4 // Originally by David Raingeard (cal2)
5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
6 // Cleanups and endian wrongness amelioration by James L. Hammons
7 // (C) 2010 Underground Software
9 // JLH = James L. Hammons <jlhamm@acm.org>
12 // --- ---------- -------------------------------------------------------------
13 // JLH 01/16/2010 Created this log ;-)
14 // JLH 01/20/2011 Change rendering to RGBA, removed unnecessary code
16 // Note: Endian wrongness probably stems from the MAME origins of this emu and
17 // the braindead way in which MAME used to handle memory. :-}
19 // Note: TOM has only a 16K memory space
21 // ------------------------------------------------------------
22 // TOM REGISTERS (Mapped by Aaron Giles)
23 // ------------------------------------------------------------
24 // F00000-F0FFFF R/W xxxxxxxx xxxxxxxx Internal Registers
25 // F00000 R/W -x-xx--- xxxxxxxx MEMCON1 - memory config reg 1
26 // -x------ -------- (CPU32 - is the CPU 32bits?)
27 // ---xx--- -------- (IOSPEED - external I/O clock cycles)
28 // -------- x------- (FASTROM - reduces ROM clock cycles)
29 // -------- -xx----- (DRAMSPEED - sets RAM clock cycles)
30 // -------- ---xx--- (ROMSPEED - sets ROM clock cycles)
31 // -------- -----xx- (ROMWIDTH - sets width of ROM: 8,16,32,64 bits)
32 // -------- -------x (ROMHI - controls ROM mapping)
33 // F00002 R/W --xxxxxx xxxxxxxx MEMCON2 - memory config reg 2
34 // --x----- -------- (HILO - image display bit order)
35 // ---x---- -------- (BIGEND - big endian addressing?)
36 // ----xxxx -------- (REFRATE - DRAM refresh rate)
37 // -------- xx------ (DWIDTH1 - DRAM1 width: 8,16,32,64 bits)
38 // -------- --xx---- (COLS1 - DRAM1 columns: 256,512,1024,2048)
39 // -------- ----xx-- (DWIDTH0 - DRAM0 width: 8,16,32,64 bits)
40 // -------- ------xx (COLS0 - DRAM0 columns: 256,512,1024,2048)
41 // F00004 R/W -----xxx xxxxxxxx HC - horizontal count
42 // -----x-- -------- (which half of the display)
43 // ------xx xxxxxxxx (10-bit counter)
44 // F00006 R/W ----xxxx xxxxxxxx VC - vertical count
45 // ----x--- -------- (which field is being generated)
46 // -----xxx xxxxxxxx (11-bit counter)
47 // F00008 R -----xxx xxxxxxxx LPH - light pen horizontal position
48 // F0000A R -----xxx xxxxxxxx LPV - light pen vertical position
49 // F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
50 // F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
51 // F00026 W -------- -------x OBF - object processor flag
52 // F00028 W ----xxxx xxxxxxxx VMODE - video mode
53 // W ----xxx- -------- (PWIDTH1-8 - width of pixel in video clock cycles)
54 // W -------x -------- (VARMOD - enable variable color resolution)
55 // W -------- x------- (BGEN - clear line buffer to BG color)
56 // W -------- -x------ (CSYNC - enable composite sync on VSYNC)
57 // W -------- --x----- (BINC - local border color if INCEN)
58 // W -------- ---x---- (INCEN - encrustation enable)
59 // W -------- ----x--- (GENLOCK - enable genlock)
60 // W -------- -----xx- (MODE - CRY16,RGB24,DIRECT16,RGB16)
61 // W -------- -------x (VIDEN - enables video)
62 // F0002A W xxxxxxxx xxxxxxxx BORD1 - border color (red/green)
63 // F0002C W -------- xxxxxxxx BORD2 - border color (blue)
64 // F0002E W ------xx xxxxxxxx HP - horizontal period
65 // F00030 W -----xxx xxxxxxxx HBB - horizontal blanking begin
66 // F00032 W -----xxx xxxxxxxx HBE - horizontal blanking end
67 // F00034 W -----xxx xxxxxxxx HSYNC - horizontal sync
68 // F00036 W ------xx xxxxxxxx HVS - horizontal vertical sync
69 // F00038 W -----xxx xxxxxxxx HDB1 - horizontal display begin 1
70 // F0003A W -----xxx xxxxxxxx HDB2 - horizontal display begin 2
71 // F0003C W -----xxx xxxxxxxx HDE - horizontal display end
72 // F0003E W -----xxx xxxxxxxx VP - vertical period
73 // F00040 W -----xxx xxxxxxxx VBB - vertical blanking begin
74 // F00042 W -----xxx xxxxxxxx VBE - vertical blanking end
75 // F00044 W -----xxx xxxxxxxx VS - vertical sync
76 // F00046 W -----xxx xxxxxxxx VDB - vertical display begin
77 // F00048 W -----xxx xxxxxxxx VDE - vertical display end
78 // F0004A W -----xxx xxxxxxxx VEB - vertical equalization begin
79 // F0004C W -----xxx xxxxxxxx VEE - vertical equalization end
80 // F0004E W -----xxx xxxxxxxx VI - vertical interrupt
81 // F00050 W xxxxxxxx xxxxxxxx PIT0 - programmable interrupt timer 0
82 // F00052 W xxxxxxxx xxxxxxxx PIT1 - programmable interrupt timer 1
83 // F00054 W ------xx xxxxxxxx HEQ - horizontal equalization end
84 // F00058 W xxxxxxxx xxxxxxxx BG - background color
85 // F000E0 R/W ---xxxxx ---xxxxx INT1 - CPU interrupt control register
86 // ---x---- -------- (C_JERCLR - clear pending Jerry ints)
87 // ----x--- -------- (C_PITCLR - clear pending PIT ints)
88 // -----x-- -------- (C_OPCLR - clear pending object processor ints)
89 // ------x- -------- (C_GPUCLR - clear pending graphics processor ints)
90 // -------x -------- (C_VIDCLR - clear pending video timebase ints)
91 // -------- ---x---- (C_JERENA - enable Jerry ints)
92 // -------- ----x--- (C_PITENA - enable PIT ints)
93 // -------- -----x-- (C_OPENA - enable object processor ints)
94 // -------- ------x- (C_GPUENA - enable graphics processor ints)
95 // -------- -------x (C_VIDENA - enable video timebase ints)
96 // F000E2 W -------- -------- INT2 - CPU interrupt resume register
97 // F00400-F005FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table A
98 // F00600-F007FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table B
99 // F00800-F00D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer A
100 // F01000-F0159F R/W xxxxxxxx xxxxxxxx LBUF - line buffer B
101 // F01800-F01D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer currently selected
102 // ------------------------------------------------------------
103 // F02000-F021FF R/W xxxxxxxx xxxxxxxx GPU control registers
104 // F02100 R/W xxxxxxxx xxxxxxxx G_FLAGS - GPU flags register
105 // R/W x------- -------- (DMAEN - DMA enable)
106 // R/W -x------ -------- (REGPAGE - register page)
107 // W --x----- -------- (G_BLITCLR - clear blitter interrupt)
108 // W ---x---- -------- (G_OPCLR - clear object processor int)
109 // W ----x--- -------- (G_PITCLR - clear PIT interrupt)
110 // W -----x-- -------- (G_JERCLR - clear Jerry interrupt)
111 // W ------x- -------- (G_CPUCLR - clear CPU interrupt)
112 // R/W -------x -------- (G_BLITENA - enable blitter interrupt)
113 // R/W -------- x------- (G_OPENA - enable object processor int)
114 // R/W -------- -x------ (G_PITENA - enable PIT interrupt)
115 // R/W -------- --x----- (G_JERENA - enable Jerry interrupt)
116 // R/W -------- ---x---- (G_CPUENA - enable CPU interrupt)
117 // R/W -------- ----x--- (IMASK - interrupt mask)
118 // R/W -------- -----x-- (NEGA_FLAG - ALU negative)
119 // R/W -------- ------x- (CARRY_FLAG - ALU carry)
120 // R/W -------- -------x (ZERO_FLAG - ALU zero)
121 // F02104 W -------- ----xxxx G_MTXC - matrix control register
122 // W -------- ----x--- (MATCOL - column/row major)
123 // W -------- -----xxx (MATRIX3-15 - matrix width)
124 // F02108 W ----xxxx xxxxxx-- G_MTXA - matrix address register
125 // F0210C W -------- -----xxx G_END - data organization register
126 // W -------- -----x-- (BIG_INST - big endian instruction fetch)
127 // W -------- ------x- (BIG_PIX - big endian pixels)
128 // W -------- -------x (BIG_IO - big endian I/O)
129 // F02110 R/W xxxxxxxx xxxxxxxx G_PC - GPU program counter
130 // F02114 R/W xxxxxxxx xx-xxxxx G_CTRL - GPU control/status register
131 // R xxxx---- -------- (VERSION - GPU version code)
132 // R/W ----x--- -------- (BUS_HOG - hog the bus!)
133 // R/W -----x-- -------- (G_BLITLAT - blitter interrupt latch)
134 // R/W ------x- -------- (G_OPLAT - object processor int latch)
135 // R/W -------x -------- (G_PITLAT - PIT interrupt latch)
136 // R/W -------- x------- (G_JERLAT - Jerry interrupt latch)
137 // R/W -------- -x------ (G_CPULAT - CPU interrupt latch)
138 // R/W -------- ---x---- (SINGLE_GO - single step one instruction)
139 // R/W -------- ----x--- (SINGLE_STEP - single step mode)
140 // R/W -------- -----x-- (FORCEINT0 - cause interrupt 0 on GPU)
141 // R/W -------- ------x- (CPUINT - send GPU interrupt to CPU)
142 // R/W -------- -------x (GPUGO - enable GPU execution)
143 // F02118-F0211B R/W xxxxxxxx xxxxxxxx G_HIDATA - high data register
144 // F0211C-F0211F R xxxxxxxx xxxxxxxx G_REMAIN - divide unit remainder
145 // F0211C W -------- -------x G_DIVCTRL - divide unit control
146 // W -------- -------x (DIV_OFFSET - 1=16.16 divide, 0=32-bit divide)
147 // ------------------------------------------------------------
149 // ------------------------------------------------------------
150 // F02200-F022FF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Blitter registers
151 // F02200 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_BASE - A1 base register
152 // F02204 W -------- ---xxxxx -xxxxxxx xxxxx-xx A1_FLAGS - A1 flags register
153 // W -------- ---x---- -------- -------- (YSIGNSUB - invert sign of Y delta)
154 // W -------- ----x--- -------- -------- (XSIGNSUB - invert sign of X delta)
155 // W -------- -----x-- -------- -------- (Y add control)
156 // W -------- ------xx -------- -------- (X add control)
157 // W -------- -------- -xxxxxx- -------- (width in 6-bit floating point)
158 // W -------- -------- -------x xx------ (ZOFFS1-6 - Z data offset)
159 // W -------- -------- -------- --xxx--- (PIXEL - pixel size)
160 // W -------- -------- -------- ------xx (PITCH1-4 - data phrase pitch)
161 // F02208 W -xxxxxxx xxxxxxxx -xxxxxxx xxxxxxxx A1_CLIP - A1 clipping size
162 // W -xxxxxxx xxxxxxxx -------- -------- (height)
163 // W -------- -------- -xxxxxxx xxxxxxxx (width)
164 // F0220C R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_PIXEL - A1 pixel pointer
165 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel value)
166 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel value)
167 // F02210 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_STEP - A1 step value
168 // W xxxxxxxx xxxxxxxx -------- -------- (Y step value)
169 // W -------- -------- xxxxxxxx xxxxxxxx (X step value)
170 // F02214 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FSTEP - A1 step fraction value
171 // W xxxxxxxx xxxxxxxx -------- -------- (Y step fraction value)
172 // W -------- -------- xxxxxxxx xxxxxxxx (X step fraction value)
173 // F02218 R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FPIXEL - A1 pixel pointer fraction
174 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel fraction value)
175 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel fraction value)
176 // F0221C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_INC - A1 increment
177 // W xxxxxxxx xxxxxxxx -------- -------- (Y increment)
178 // W -------- -------- xxxxxxxx xxxxxxxx (X increment)
179 // F02220 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FINC - A1 increment fraction
180 // W xxxxxxxx xxxxxxxx -------- -------- (Y increment fraction)
181 // W -------- -------- xxxxxxxx xxxxxxxx (X increment fraction)
182 // F02224 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_BASE - A2 base register
183 // F02228 W -------- ---xxxxx -xxxxxxx xxxxx-xx A2_FLAGS - A2 flags register
184 // W -------- ---x---- -------- -------- (YSIGNSUB - invert sign of Y delta)
185 // W -------- ----x--- -------- -------- (XSIGNSUB - invert sign of X delta)
186 // W -------- -----x-- -------- -------- (Y add control)
187 // W -------- ------xx -------- -------- (X add control)
188 // W -------- -------- -xxxxxx- -------- (width in 6-bit floating point)
189 // W -------- -------- -------x xx------ (ZOFFS1-6 - Z data offset)
190 // W -------- -------- -------- --xxx--- (PIXEL - pixel size)
191 // W -------- -------- -------- ------xx (PITCH1-4 - data phrase pitch)
192 // F0222C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_MASK - A2 window mask
193 // F02230 R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_PIXEL - A2 pixel pointer
194 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel value)
195 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel value)
196 // F02234 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_STEP - A2 step value
197 // W xxxxxxxx xxxxxxxx -------- -------- (Y step value)
198 // W -------- -------- xxxxxxxx xxxxxxxx (X step value)
199 // F02238 W -xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_CMD - command register
200 // W -x------ -------- -------- -------- (SRCSHADE - modify source intensity)
201 // W --x----- -------- -------- -------- (BUSHI - hi priority bus)
202 // W ---x---- -------- -------- -------- (BKGWREN - writeback destination)
203 // W ----x--- -------- -------- -------- (DCOMPEN - write inhibit from data comparator)
204 // W -----x-- -------- -------- -------- (BCOMPEN - write inhibit from bit coparator)
205 // W ------x- -------- -------- -------- (CMPDST - compare dest instead of src)
206 // W -------x xxx----- -------- -------- (logical operation)
207 // W -------- ---xxx-- -------- -------- (ZMODE - Z comparator mode)
208 // W -------- ------x- -------- -------- (ADDDSEL - select sum of src & dst)
209 // W -------- -------x -------- -------- (PATDSEL - select pattern data)
210 // W -------- -------- x------- -------- (TOPNEN - enable carry into top intensity nibble)
211 // W -------- -------- -x------ -------- (TOPBEN - enable carry into top intensity byte)
212 // W -------- -------- --x----- -------- (ZBUFF - enable Z updates in inner loop)
213 // W -------- -------- ---x---- -------- (GOURD - enable gouraud shading in inner loop)
214 // W -------- -------- ----x--- -------- (DSTA2 - reverses A2/A1 roles)
215 // W -------- -------- -----x-- -------- (UPDA2 - add A2 step to A2 in outer loop)
216 // W -------- -------- ------x- -------- (UPDA1 - add A1 step to A1 in outer loop)
217 // W -------- -------- -------x -------- (UPDA1F - add A1 fraction step to A1 in outer loop)
218 // W -------- -------- -------- x------- (diagnostic use)
219 // W -------- -------- -------- -x------ (CLIP_A1 - clip A1 to window)
220 // W -------- -------- -------- --x----- (DSTWRZ - enable dest Z write in inner loop)
221 // W -------- -------- -------- ---x---- (DSTENZ - enable dest Z read in inner loop)
222 // W -------- -------- -------- ----x--- (DSTEN - enables dest data read in inner loop)
223 // W -------- -------- -------- -----x-- (SRCENX - enable extra src read at start of inner)
224 // W -------- -------- -------- ------x- (SRCENZ - enables source Z read in inner loop)
225 // W -------- -------- -------- -------x (SRCEN - enables source data read in inner loop)
226 // F02238 R xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_CMD - status register
227 // R xxxxxxxx xxxxxxxx -------- -------- (inner count)
228 // R -------- -------- xxxxxxxx xxxxxx-- (diagnostics)
229 // R -------- -------- -------- ------x- (STOPPED - when stopped in collision detect)
230 // R -------- -------- -------- -------x (IDLE - when idle)
231 // F0223C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_COUNT - counters register
232 // W xxxxxxxx xxxxxxxx -------- -------- (outer loop count)
233 // W -------- -------- xxxxxxxx xxxxxxxx (inner loop count)
234 // F02240-F02247 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCD - source data register
235 // F02248-F0224F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_DSTD - destination data register
236 // F02250-F02257 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_DSTZ - destination Z register
237 // F02258-F0225F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCZ1 - source Z register 1
238 // F02260-F02267 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCZ2 - source Z register 2
239 // F02268-F0226F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_PATD - pattern data register
240 // F02270 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_IINC - intensity increment
241 // F02274 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_ZINC - Z increment
242 // F02278 W -------- -------- -------- -----xxx B_STOP - collision control
243 // W -------- -------- -------- -----x-- (STOPEN - enable blitter collision stops)
244 // W -------- -------- -------- ------x- (ABORT - abort after stop)
245 // W -------- -------- -------- -------x (RESUME - resume after stop)
246 // F0227C W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I3 - intensity 3
247 // F02280 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I2 - intensity 2
248 // F02284 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I1 - intensity 1
249 // F02288 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I0 - intensity 0
250 // F0228C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z3 - Z3
251 // F02290 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z2 - Z2
252 // F02294 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z1 - Z1
253 // F02298 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z0 - Z0
254 // ------------------------------------------------------------
258 #include <string.h> // For memset()
259 #include <stdlib.h> // For rand()
267 //#include "memory.h"
269 #include "settings.h"
271 #define NEW_TIMER_SYSTEM
273 // TOM registers (offset from $F00000)
280 #define MODE 0x0006 // Line buffer to video generator mode
281 #define BGEN 0x0080 // Background enable (CRY & RGB16 only)
282 #define VARMOD 0x0100 // Mixed CRY/RGB16 mode (only works in MODE 0!)
283 #define PWIDTH 0x0E00 // Pixel width in video clock cycles (value written + 1)
284 #define BORD1 0x2A // Border green/red values (8 BPP)
285 #define BORD2 0x2C // Border blue value (8 BPP)
286 #define HP 0x2E // Values range from 1 - 1024 (value written + 1)
289 #define HDB1 0x38 // Horizontal display begin 1
292 #define VP 0x3E // Value ranges from 1 - 2048 (value written + 1)
304 //NOTE: These arbitrary cutoffs are NOT taken into account for PAL jaguar screens. !!! FIX !!!
306 // Arbitrary video cutoff values (i.e., first/last visible spots on a TV, in HC ticks)
307 /*#define LEFT_VISIBLE_HC 208
308 #define RIGHT_VISIBLE_HC 1528//*/
309 #define LEFT_VISIBLE_HC 208
310 #define RIGHT_VISIBLE_HC 1488
311 //#define TOP_VISIBLE_VC 25
312 //#define BOTTOM_VISIBLE_VC 503
313 #define TOP_VISIBLE_VC 31
314 #define BOTTOM_VISIBLE_VC 511
316 //Are these PAL horizontals correct?
317 //They seem to be for the most part, but there are some games that seem to be
318 //shifted over to the right from this "window".
319 #define LEFT_VISIBLE_HC_PAL 208
320 #define RIGHT_VISIBLE_HC_PAL 1488
321 #define TOP_VISIBLE_VC_PAL 67
322 #define BOTTOM_VISIBLE_VC_PAL 579
324 //This can be defined in the makefile as well...
325 //(It's easier to do it here, though...)
328 uint8 tomRam8[0x4000];
329 uint32 tomWidth, tomHeight;
330 uint32 tomTimerPrescaler;
331 uint32 tomTimerDivider;
332 int32 tomTimerCounter;
333 uint16 tom_jerry_int_pending, tom_timer_int_pending, tom_object_int_pending,
334 tom_gpu_int_pending, tom_video_int_pending;
335 uint32 * TOMBackbuffer;
337 static const char * videoMode_to_str[8] =
338 { "16 BPP CRY", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB",
339 "Mixed mode", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB" };
341 typedef void (render_xxx_scanline_fn)(uint32 *);
343 // Private function prototypes
345 void tom_render_16bpp_cry_scanline(uint32 * backbuffer);
346 void tom_render_24bpp_scanline(uint32 * backbuffer);
347 void tom_render_16bpp_direct_scanline(uint32 * backbuffer);
348 void tom_render_16bpp_rgb_scanline(uint32 * backbuffer);
349 void tom_render_16bpp_cry_rgb_mix_scanline(uint32 * backbuffer);
351 //render_xxx_scanline_fn * scanline_render_normal[] =
352 render_xxx_scanline_fn * scanline_render[] =
354 tom_render_16bpp_cry_scanline,
355 tom_render_24bpp_scanline,
356 tom_render_16bpp_direct_scanline,
357 tom_render_16bpp_rgb_scanline,
358 tom_render_16bpp_cry_rgb_mix_scanline,
359 tom_render_24bpp_scanline,
360 tom_render_16bpp_direct_scanline,
361 tom_render_16bpp_rgb_scanline
364 // Screen info for various games [PAL]...
367 TOM: Horizontal Period written by M68K: 850 (+1*2 = 1702)
368 TOM: Horizontal Blank Begin written by M68K: 1711
369 TOM: Horizontal Blank End written by M68K: 158
370 TOM: Horizontal Display End written by M68K: 1696
371 TOM: Horizontal Display Begin 1 written by M68K: 166
372 TOM: Vertical Period written by M68K: 623 (non-interlaced)
373 TOM: Vertical Blank End written by M68K: 34
374 TOM: Vertical Display Begin written by M68K: 46
375 TOM: Vertical Display End written by M68K: 526
376 TOM: Vertical Blank Begin written by M68K: 600
377 TOM: Vertical Sync written by M68K: 618
378 TOM: Horizontal Display End written by M68K: 1665
379 TOM: Horizontal Display Begin 1 written by M68K: 203
380 TOM: Vertical Display Begin written by M68K: 38
381 TOM: Vertical Display End written by M68K: 518
382 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 151)
383 TOM: Horizontal Display End written by M68K: 1713
384 TOM: Horizontal Display Begin 1 written by M68K: 157
385 TOM: Vertical Display Begin written by M68K: 35
386 TOM: Vertical Display End written by M68K: 2047
387 Horizontal range: 157 - 1713 (width: 1557 / 4 = 389.25, / 5 = 315.4)
390 TOM: Horizontal Period written by M68K: 845 (+1*2 = 1692)
391 TOM: Horizontal Blank Begin written by M68K: 1700
392 TOM: Horizontal Blank End written by M68K: 122
393 TOM: Horizontal Display End written by M68K: 1600
394 TOM: Horizontal Display Begin 1 written by M68K: 268
395 TOM: Vertical Period written by M68K: 523 (non-interlaced)
396 TOM: Vertical Blank End written by M68K: 40
397 TOM: Vertical Display Begin written by M68K: 44
398 TOM: Vertical Display End written by M68K: 492
399 TOM: Vertical Blank Begin written by M68K: 532
400 TOM: Vertical Sync written by M68K: 513
401 TOM: Video Mode written by M68K: 04C7. PWIDTH = 3, MODE = 16 BPP RGB, flags: BGEN (VC = 461)
404 TOM: Horizontal Display End written by M68K: 1713
405 TOM: Horizontal Display Begin 1 written by M68K: 157
406 TOM: Vertical Display Begin written by M68K: 35
407 TOM: Vertical Display End written by M68K: 2047
408 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 89)
409 TOM: Horizontal Display Begin 1 written by M68K: 208
410 TOM: Horizontal Display End written by M68K: 1662
411 TOM: Vertical Display Begin written by M68K: 100
412 TOM: Vertical Display End written by M68K: 2047
413 TOM: Video Mode written by M68K: 07C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN VARMOD (VC = 205)
414 Horizontal range: 208 - 1662 (width: 1455 / 4 = 363.5)
417 TOM: Vertical Display Begin written by M68K: 96
418 TOM: Vertical Display End written by M68K: 2047
419 TOM: Horizontal Display Begin 1 written by M68K: 239
420 TOM: Horizontal Display End written by M68K: 1692
421 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 378)
422 TOM: Vertical Display Begin written by M68K: 44
423 TOM: Vertical Display End written by M68K: 2047
424 TOM: Horizontal Display Begin 1 written by M68K: 239
425 TOM: Horizontal Display End written by M68K: 1692
426 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 559)
427 TOM: Vertical Display Begin written by M68K: 84
428 TOM: Vertical Display End written by M68K: 2047
429 TOM: Horizontal Display Begin 1 written by M68K: 239
430 TOM: Horizontal Display End written by M68K: 1692
431 TOM: Vertical Display Begin written by M68K: 44
432 TOM: Vertical Display End written by M68K: 2047
433 TOM: Horizontal Display Begin 1 written by M68K: 239
434 TOM: Horizontal Display End written by M68K: 1692
435 Horizontal range: 239 - 1692 (width: 1454 / 4 = 363.5)
439 // Screen info for various games [NTSC]...
442 TOM: Horizontal Display End written by M68K: 1727
443 TOM: Horizontal Display Begin 1 written by M68K: 123
444 TOM: Vertical Display Begin written by M68K: 25
445 TOM: Vertical Display End written by M68K: 2047
446 TOM: Video Mode written by M68K: 0EC1. PWIDTH = 8, MODE = 16 BPP CRY, flags: BGEN (VC = 5)
447 Also does PWIDTH = 4...
448 Vertical resolution: 238 lines
451 TOM: Horizontal Display End written by M68K: 1727
452 TOM: Horizontal Display Begin 1 written by M68K: 123
453 TOM: Vertical Display Begin written by M68K: 25
454 TOM: Vertical Display End written by M68K: 2047
455 TOM: Vertical Interrupt written by M68K: 507
456 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 92)
457 TOM: Horizontal Display Begin 1 written by M68K: 208
458 TOM: Horizontal Display End written by M68K: 1670
459 Display starts at 31, then 52!
460 Vertical resolution: 238 lines
463 TOM: Horizontal Display End written by M68K: 1727
464 TOM: Horizontal Display Begin 1 written by M68K: 123
465 TOM: Vertical Display Begin written by M68K: 25
466 TOM: Vertical Display End written by M68K: 2047
467 TOM: Video Mode written by GPU: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 4)
468 TOM: Video Mode written by GPU: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 508)
469 Display starts at 31 (PWIDTH = 4), 24 (PWIDTH = 5)
472 TOM: Vertical Interrupt written by M68K: 2047
473 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 0)
474 TOM: Horizontal Display End written by M68K: 1727
475 TOM: Horizontal Display Begin 1 written by M68K: 123
476 TOM: Vertical Display Begin written by M68K: 25
477 TOM: Vertical Display End written by M68K: 2047
478 TOM: Vertical Interrupt written by M68K: 507
479 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 369)
480 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 510)
481 TOM: Video Mode written by M68K: 06C3. PWIDTH = 4, MODE = 24 BPP RGB, flags: BGEN (VC = 510)
483 Vertical resolution: 238 lines
484 [Seems to be a problem between the horizontal positioning of the 16-bit CRY & 24-bit RGB]
487 TOM: Horizontal Period written by M68K: 844 (+1*2 = 1690)
488 TOM: Horizontal Blank Begin written by M68K: 1713
489 TOM: Horizontal Blank End written by M68K: 125
490 TOM: Horizontal Display End written by M68K: 1696
491 TOM: Horizontal Display Begin 1 written by M68K: 166
492 TOM: Vertical Period written by M68K: 523 (non-interlaced)
493 TOM: Vertical Blank End written by M68K: 24
494 TOM: Vertical Display Begin written by M68K: 46
495 TOM: Vertical Display End written by M68K: 496
496 TOM: Vertical Blank Begin written by M68K: 500
497 TOM: Vertical Sync written by M68K: 517
498 TOM: Vertical Interrupt written by M68K: 497
499 TOM: Video Mode written by M68K: 04C1. PWIDTH = 3, MODE = 16 BPP CRY, flags: BGEN (VC = 270)
503 TOM: Horizontal Display End written by M68K: 1727
504 TOM: Horizontal Display Begin 1 written by M68K: 123
505 TOM: Vertical Display Begin written by M68K: 25
506 TOM: Vertical Display End written by M68K: 2047
507 TOM: Vertical Interrupt written by M68K: 507
508 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 9)
511 TOM: Horizontal Display End written by M68K: 1823
512 TOM: Horizontal Display Begin 1 written by M68K: 45
513 TOM: Vertical Display Begin written by M68K: 40
514 TOM: Vertical Display End written by M68K: 2047
515 TOM: Vertical Interrupt written by M68K: 491
516 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 398)
517 Display starts at 11 (123 - 45 = 78, 78 / 4 = 19 pixels to skip)
518 Width is 417, so maybe width of 379 would be good (starting at 123, ending at 1639)
519 Vertical resolution: 238 lines
522 TOM: Horizontal Display End written by M68K: 1727
523 TOM: Horizontal Display Begin 1 written by M68K: 188
524 TOM: Vertical Display Begin written by M68K: 1
525 TOM: Vertical Display End written by M68K: 2047
526 TOM: Vertical Interrupt written by M68K: 483
527 TOM: Video Mode written by M68K: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 99)
528 Width would be 303 with above scheme, but border width would be 13 pixels
531 Vertical resolution: 238 lines
534 uint32 RGB16ToRGB32[0x10000];
535 uint32 CRY16ToRGB32[0x10000];
536 uint32 MIX16ToRGB32[0x10000];
538 #warning "This is not endian-safe. !!! FIX !!!"
539 void TOMFillLookupTables(void)
541 // NOTE: Jaguar 16-bit (non-CRY) color is RBG 556 like so:
542 // RRRR RBBB BBGG GGGG
543 for(uint32 i=0; i<0x10000; i++)
544 //hm. RGB16ToRGB32[i] = 0xFF000000
545 // | ((i & 0xF100) >> 8) | ((i & 0xE000) >> 13)
546 // | ((i & 0x07C0) << 13) | ((i & 0x0700) << 8)
547 // | ((i & 0x003F) << 10) | ((i & 0x0030) << 4);
548 RGB16ToRGB32[i] = 0x000000FF
549 | ((i & 0xF100) << 16) // Red
550 | ((i & 0x003F) << 18) // Green
551 | ((i & 0x07C0) << 5); // Blue
553 for(uint32 i=0; i<0x10000; i++)
555 uint32 cyan = (i & 0xF000) >> 12,
556 red = (i & 0x0F00) >> 8,
557 intensity = (i & 0x00FF);
559 uint32 r = (((uint32)redcv[cyan][red]) * intensity) >> 8,
560 g = (((uint32)greencv[cyan][red]) * intensity) >> 8,
561 b = (((uint32)bluecv[cyan][red]) * intensity) >> 8;
563 //hm. CRY16ToRGB32[i] = 0xFF000000 | (b << 16) | (g << 8) | r;
564 CRY16ToRGB32[i] = 0x000000FF | (r << 24) | (g << 16) | (b << 8);
565 MIX16ToRGB32[i] = (i & 0x01 ? RGB16ToRGB32[i] : CRY16ToRGB32[i]);
569 void TOMSetPendingJERRYInt(void)
571 tom_jerry_int_pending = 1;
574 void TOMSetPendingTimerInt(void)
576 tom_timer_int_pending = 1;
579 void TOMSetPendingObjectInt(void)
581 tom_object_int_pending = 1;
584 void TOMSetPendingGPUInt(void)
586 tom_gpu_int_pending = 1;
589 void TOMSetPendingVideoInt(void)
591 tom_video_int_pending = 1;
594 uint8 * TOMGetRamPointer(void)
599 uint8 TOMGetVideoMode(void)
601 uint16 vmode = GET16(tomRam8, VMODE);
602 return ((vmode & VARMOD) >> 6) | ((vmode & MODE) >> 1);
605 //Used in only one place (and for debug purposes): OBJECTP.CPP
606 #warning "Used in only one place (and for debug purposes): OBJECTP.CPP !!! FIX !!!"
607 uint16 TOMGetVDB(void)
609 return GET16(tomRam8, VDB);
613 // 16 BPP CRY/RGB mixed mode rendering
615 void tom_render_16bpp_cry_rgb_mix_scanline(uint32 * backbuffer)
617 //CHANGED TO 32BPP RENDERING
618 uint16 width = tomWidth;
619 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
621 //New stuff--restrict our drawing...
622 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
623 //NOTE: May have to check HDB2 as well!
624 // Get start position in HC ticks
625 int16 startPos = GET16(tomRam8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL);
628 current_line_buffer += 2 * -startPos;
630 //This case doesn't properly handle the "start on the right side of virtual screen" case
631 //Dunno why--looks Ok...
632 //What *is* for sure wrong is that it doesn't copy the linebuffer's BG pixels...
633 //This should likely be 4 instead of 2 (?--not sure)
634 backbuffer += 2 * startPos, width -= startPos;
638 uint16 color = (*current_line_buffer++) << 8;
639 color |= *current_line_buffer++;
640 *backbuffer++ = MIX16ToRGB32[color];
646 // 16 BPP CRY mode rendering
648 void tom_render_16bpp_cry_scanline(uint32 * backbuffer)
650 //CHANGED TO 32BPP RENDERING
651 uint16 width = tomWidth;
652 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
654 //New stuff--restrict our drawing...
655 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
656 //NOTE: May have to check HDB2 as well!
657 int16 startPos = GET16(tomRam8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL);// Get start position in HC ticks
660 current_line_buffer += 2 * -startPos;
662 //This should likely be 4 instead of 2 (?--not sure)
663 backbuffer += 2 * startPos, width -= startPos;
667 uint16 color = (*current_line_buffer++) << 8;
668 color |= *current_line_buffer++;
669 *backbuffer++ = CRY16ToRGB32[color];
675 // 24 BPP mode rendering
677 void tom_render_24bpp_scanline(uint32 * backbuffer)
679 //CHANGED TO 32BPP RENDERING
680 uint16 width = tomWidth;
681 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
683 //New stuff--restrict our drawing...
684 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
685 //NOTE: May have to check HDB2 as well!
686 int16 startPos = GET16(tomRam8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL); // Get start position in HC ticks
689 current_line_buffer += 4 * -startPos;
691 //This should likely be 4 instead of 2 (?--not sure)
692 backbuffer += 2 * startPos, width -= startPos;
696 uint32 g = *current_line_buffer++;
697 uint32 r = *current_line_buffer++;
698 current_line_buffer++;
699 uint32 b = *current_line_buffer++;
700 //hm. *backbuffer++ = 0xFF000000 | (b << 16) | (g << 8) | r;
701 *backbuffer++ = 0x000000FF | (r << 24) | (g << 16) | (b << 8);
706 //Seems to me that this is NOT a valid mode--the JTRM seems to imply that you would need
707 //extra hardware outside of the Jaguar console to support this!
709 // 16 BPP direct mode rendering
711 void tom_render_16bpp_direct_scanline(uint32 * backbuffer)
713 uint16 width = tomWidth;
714 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
718 uint16 color = (*current_line_buffer++) << 8;
719 color |= *current_line_buffer++;
720 *backbuffer++ = color >> 1;
726 // 16 BPP RGB mode rendering
728 void tom_render_16bpp_rgb_scanline(uint32 * backbuffer)
730 //CHANGED TO 32BPP RENDERING
731 // 16 BPP RGB: 0-5 green, 6-10 blue, 11-15 red
733 uint16 width = tomWidth;
734 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
736 //New stuff--restrict our drawing...
737 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
738 //NOTE: May have to check HDB2 as well!
739 int16 startPos = GET16(tomRam8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL); // Get start position in HC ticks
743 current_line_buffer += 2 * -startPos;
745 //This should likely be 4 instead of 2 (?--not sure)
746 backbuffer += 2 * startPos, width -= startPos;
750 uint32 color = (*current_line_buffer++) << 8;
751 color |= *current_line_buffer++;
752 *backbuffer++ = RGB16ToRGB32[color];
758 void TOMResetBackbuffer(uint32 * backbuffer)
760 TOMBackbuffer = backbuffer;
764 // Process a single scanline
766 uint32 tomDeviceWidth;//kludge
767 void TOMExecScanline(uint16 scanline, bool render)
769 bool inActiveDisplayArea = true;
771 //Interlacing is still not handled correctly here... !!! FIX !!!
772 if (scanline & 0x01) // Execute OP only on even lines (non-interlaced only!)
775 //Hm, it seems that the OP needs to execute from zero, so let's try it:
776 // And it works! But need to do some optimizations in the OP to keep it from attempting
777 // to do a scanline render in the non-display area... [DONE]
779 if (scanline >= (uint16)GET16(tomRam8, VDB) && scanline < (uint16)GET16(tomRam8, VDE))
783 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
784 uint8 bgHI = tomRam8[BG], bgLO = tomRam8[BG + 1];
786 // Clear line buffer with BG
787 if (GET16(tomRam8, VMODE) & BGEN) // && (CRY or RGB16)...
788 for(uint32 i=0; i<720; i++)
789 *current_line_buffer++ = bgHI, *current_line_buffer++ = bgLO;
791 OPProcessList(scanline, render);
795 inActiveDisplayArea = false;
797 inActiveDisplayArea =
798 (scanline >= (uint16)GET16(tomRam8, VDB) && scanline < (uint16)GET16(tomRam8, VDE)
801 if (scanline < (uint16)GET16(tomRam8, VDE))
803 if (render)//With JaguarExecuteNew() this is always true...
805 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
806 uint8 bgHI = tomRam8[BG], bgLO = tomRam8[BG + 1];
808 // Clear line buffer with BG
809 if (GET16(tomRam8, VMODE) & BGEN) // && (CRY or RGB16)...
810 for(uint32 i=0; i<720; i++)
811 *current_line_buffer++ = bgHI, *current_line_buffer++ = bgLO;
813 // OPProcessList(scanline, render);
814 //This seems to take care of it...
815 OPProcessList(scanline, inActiveDisplayArea);
820 // Try to take PAL into account...
822 uint16 topVisible = (vjs.hardwareTypeNTSC ? TOP_VISIBLE_VC : TOP_VISIBLE_VC_PAL),
823 bottomVisible = (vjs.hardwareTypeNTSC ? BOTTOM_VISIBLE_VC : BOTTOM_VISIBLE_VC_PAL);
825 // Here's our virtualized scanline code...
827 if (scanline >= topVisible && scanline < bottomVisible)
829 if (inActiveDisplayArea)
831 //NOTE: The following doesn't put BORDER color on the sides... !!! FIX !!!
832 #warning "The following doesn't put BORDER color on the sides... !!! FIX !!!"
833 if (vjs.renderType == RT_NORMAL)
834 scanline_render[TOMGetVideoMode()](TOMBackbuffer);
838 tom_render_16bpp_cry_scanline,
839 tom_render_24bpp_scanline,
840 tom_render_16bpp_direct_scanline,
841 tom_render_16bpp_rgb_scanline,
842 tom_render_16bpp_cry_rgb_mix_scanline,
843 tom_render_24bpp_scanline,
844 tom_render_16bpp_direct_scanline,
845 tom_render_16bpp_rgb_scanline
847 #define MODE 0x0006 // Line buffer to video generator mode
848 #define VARMOD 0x0100 // Mixed CRY/RGB16 mode (only works in MODE 0!)
850 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
851 uint8 mode = ((GET16(tomRam8, VMODE) & MODE) >> 1);
852 bool varmod = GET16(tomRam8, VMODE) & VARMOD;
853 //The video texture line buffer ranges from 0 to 1279, with its left edge starting at
854 //LEFT_VISIBLE_HC. So, we need to start writing into the backbuffer at HDB1, using pwidth
855 //as our scaling factor. The way it generates its image on a real TV!
857 //So, for example, if HDB1 is less than LEFT_VISIBLE_HC, then we have to figure out where
858 //in the VTLB that we start writing pixels from the Jaguar line buffer (VTLB start=0,
862 // 24 BPP mode rendering
864 void tom_render_24bpp_scanline(uint32 * backbuffer)
866 //CHANGED TO 32BPP RENDERING
867 uint16 width = tomWidth;
868 uint8 * current_line_buffer = (uint8 *)&tomRam8[0x1800];
870 //New stuff--restrict our drawing...
871 uint8 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
872 //NOTE: May have to check HDB2 as well!
873 int16 startPos = GET16(tomRam8, HDB1) - (vjs.hardwareTypeNTSC ? LEFT_VISIBLE_HC : LEFT_VISIBLE_HC_PAL); // Get start position in HC ticks
876 current_line_buffer += 4 * -startPos;
878 //This should likely be 4 instead of 2 (?--not sure)
879 backbuffer += 2 * startPos, width -= startPos;
883 uint32 g = *current_line_buffer++;
884 uint32 r = *current_line_buffer++;
885 current_line_buffer++;
886 uint32 b = *current_line_buffer++;
887 *backbuffer++ = 0xFF000000 | (b << 16) | (g << 8) | r;
897 // If outside of VDB & VDE, then display the border color
898 uint32 * currentLineBuffer = TOMBackbuffer;
899 uint8 g = tomRam8[BORD1], r = tomRam8[BORD1 + 1], b = tomRam8[BORD2 + 1];
900 //Hm. uint32 pixel = 0xFF000000 | (b << 16) | (g << 8) | r;
901 uint32 pixel = 0x000000FF | (r << 24) | (g << 16) | (b << 8);
903 for(uint32 i=0; i<tomWidth; i++)
904 *currentLineBuffer++ = pixel;
907 #warning "!!! Need to move this to an interface file !!! FIX !!!"
908 // TOMBackbuffer += GetSDLScreenWidthInPixels();
909 TOMBackbuffer += tomDeviceWidth;
914 // TOM initialization
918 TOMFillLookupTables();
928 WriteLog("TOM: Resolution %i x %i %s\n", TOMGetVideoModeWidth(), TOMGetVideoModeHeight(),
929 videoMode_to_str[TOMGetVideoMode()]);
930 // WriteLog("\ntom: object processor:\n");
931 // WriteLog("tom: pointer to object list: 0x%.8x\n",op_get_list_pointer());
932 // WriteLog("tom: INT1=0x%.2x%.2x\n",TOMReadByte(0xf000e0),TOMReadByte(0xf000e1));
935 // memory_free(tomRam8);
936 // memory_free(tom_cry_rgb_mix_lut);
939 uint32 TOMGetVideoModeWidth(void)
941 //These widths are pretty bogus. Should use HDB1/2 & HDE/HBB & PWIDTH to calc the width...
942 // uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 166 };
943 //Temporary, for testing Doom...
944 // uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 332 };
946 // Note that the following PWIDTH values have the following pixel aspect ratios:
947 // PWIDTH = 1 -> 0.25:1 (1:4) pixels (X:Y ratio)
948 // PWIDTH = 2 -> 0.50:1 (1:2) pixels
949 // PWIDTH = 3 -> 0.75:1 (3:4) pixels
950 // PWIDTH = 4 -> 1.00:1 (1:1) pixels
951 // PWIDTH = 5 -> 1.25:1 (5:4) pixels
952 // PWIDTH = 6 -> 1.50:1 (3:2) pixels
953 // PWIDTH = 7 -> 1.75:1 (7:4) pixels
954 // PWIDTH = 8 -> 2.00:1 (2:1) pixels
956 // Also note that the JTRM says that PWIDTH of 4 gives pixels that are "about" square--
957 // this implies that the other modes have pixels that are *not* square!
958 // Also, I seriously doubt that you will see any games that use PWIDTH = 1!
960 // NOTE: Even though the PWIDTH value is + 1, here we're using a zero-based index and
961 // so we don't bother to add one...
962 // return width[(GET16(tomRam8, VMODE) & PWIDTH) >> 9];
964 // Now, we just calculate it...
965 /* uint16 hdb1 = GET16(tomRam8, HDB1), hde = GET16(tomRam8, HDE),
966 hbb = GET16(tomRam8, HBB), pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
967 // return ((hbb < hde ? hbb : hde) - hdb1) / pwidth;
968 //Temporary, for testing Doom...
969 return ((hbb < hde ? hbb : hde) - hdb1) / (pwidth == 8 ? 4 : pwidth);*/
971 // To make it easier to make a quasi-fixed display size, we restrict the viewing
972 // area to an arbitrary range of the Horizontal Count.
973 uint16 pwidth = ((GET16(tomRam8, VMODE) & PWIDTH) >> 9) + 1;
974 return (vjs.hardwareTypeNTSC ? RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC : RIGHT_VISIBLE_HC_PAL - LEFT_VISIBLE_HC_PAL) / pwidth;
975 //Temporary, for testing Doom...
976 // return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 8 ? 4 : pwidth);
977 //// return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 4 ? 8 : pwidth);
979 // More speculating...
980 // According to the JTRM, the number of potential pixels across is given by the
981 // Horizontal Period (HP - in NTSC this is 845). The Horizontal Count counts from
982 // zero to this value twice per scanline (the high bit is set on the second count).
983 // HBE and HBB define the absolute "black" limits of the screen, while HDB1/2 and
984 // HDE determine the extent of the OP "on" time. I.e., when the OP is turned on by
985 // HDB1, it starts fetching the line from position 0 in LBUF.
987 // The trick, it would seem, is to figure out how long the typical visible scanline
988 // of a TV is in HP ticks and limit the visible area to that (divided by PWIDTH, of
989 // course). Using that length, we can establish an "absolute left display limit" with
990 // which to measure HBB & HDB1/2 against when rendering LBUF (i.e., if HDB1 is 20 ticks
991 // to the right of the ALDL and PWIDTH is 4, then start writing the LBUF starting at
992 // backbuffer + 5 pixels).
994 // That's basically what we're doing now...!
997 // *** SPECULATION ***
998 // It might work better to virtualize the height settings, i.e., set the vertical
999 // height at 240 lines and clip using the VDB and VDE/VP registers...
1000 // Same with the width... [Width is pretty much virtualized now.]
1002 // Now that that the width is virtualized, let's virtualize the height. :-)
1003 uint32 TOMGetVideoModeHeight(void)
1005 // uint16 vmode = GET16(tomRam8, VMODE);
1006 // uint16 vbe = GET16(tomRam8, VBE);
1007 // uint16 vbb = GET16(tomRam8, VBB);
1008 // uint16 vdb = GET16(tomRam8, VDB);
1009 // uint16 vde = GET16(tomRam8, VDE);
1010 // uint16 vp = GET16(tomRam8, VP);
1012 /* if (vde == 0xFFFF)
1015 // return 227;//WAS:(vde/*-vdb*/) >> 1;
1016 // The video mode height probably works this way:
1017 // VC counts from 0 to VP. VDB starts the OP. Either when
1018 // VDE is reached or VP, the OP is stopped. Let's try it...
1019 // Also note that we're conveniently ignoring interlaced display modes...!
1020 // return ((vde > vp ? vp : vde) - vdb) >> 1;
1021 // return ((vde > vbb ? vbb : vde) - vdb) >> 1;
1022 //Let's try from the Vertical Blank interval...
1024 // return (vbb - vbe) >> 1; // Again, doesn't take interlacing into account...
1025 // This of course doesn't take interlacing into account. But I haven't seen any
1026 // Jaguar software that takes advantage of it either...
1027 //Also, doesn't reflect PAL Jaguar either... !!! FIX !!! [DONE]
1028 // return 240; // Set virtual screen height to 240 lines...
1029 return (vjs.hardwareTypeNTSC ? 240 : 256);
1034 // Now PAL friendly!
1040 memset(tomRam8, 0x00, 0x4000);
1042 if (vjs.hardwareTypeNTSC)
1044 SET16(tomRam8, MEMCON1, 0x1861);
1045 SET16(tomRam8, MEMCON2, 0x35CC);
1046 SET16(tomRam8, HP, 844); // Horizontal Period (1-based; HP=845)
1047 SET16(tomRam8, HBB, 1713); // Horizontal Blank Begin
1048 SET16(tomRam8, HBE, 125); // Horizontal Blank End
1049 SET16(tomRam8, HDE, 1665); // Horizontal Display End
1050 SET16(tomRam8, HDB1, 203); // Horizontal Display Begin 1
1051 SET16(tomRam8, VP, 523); // Vertical Period (1-based; in this case VP = 524)
1052 SET16(tomRam8, VBE, 24); // Vertical Blank End
1053 SET16(tomRam8, VDB, 38); // Vertical Display Begin
1054 SET16(tomRam8, VDE, 518); // Vertical Display End
1055 SET16(tomRam8, VBB, 500); // Vertical Blank Begin
1056 SET16(tomRam8, VS, 517); // Vertical Sync
1057 SET16(tomRam8, VMODE, 0x06C1);
1061 SET16(tomRam8, MEMCON1, 0x1861);
1062 SET16(tomRam8, MEMCON2, 0x35CC);
1063 SET16(tomRam8, HP, 850); // Horizontal Period
1064 SET16(tomRam8, HBB, 1711); // Horizontal Blank Begin
1065 SET16(tomRam8, HBE, 158); // Horizontal Blank End
1066 SET16(tomRam8, HDE, 1665); // Horizontal Display End
1067 SET16(tomRam8, HDB1, 203); // Horizontal Display Begin 1
1068 SET16(tomRam8, VP, 623); // Vertical Period (1-based; in this case VP = 624)
1069 SET16(tomRam8, VBE, 34); // Vertical Blank End
1070 SET16(tomRam8, VDB, 38); // Vertical Display Begin
1071 SET16(tomRam8, VDE, 518); // Vertical Display End
1072 SET16(tomRam8, VBB, 600); // Vertical Blank Begin
1073 SET16(tomRam8, VS, 618); // Vertical Sync
1074 SET16(tomRam8, VMODE, 0x06C1);
1080 tom_jerry_int_pending = 0;
1081 tom_timer_int_pending = 0;
1082 tom_object_int_pending = 0;
1083 tom_gpu_int_pending = 0;
1084 tom_video_int_pending = 0;
1086 tomTimerPrescaler = 0; // TOM PIT is disabled
1087 tomTimerDivider = 0;
1088 tomTimerCounter = 0;
1092 // TOM byte access (read)
1094 uint8 TOMReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
1096 //???Is this needed???
1097 // It seems so. Perhaps it's the +$8000 offset being written to (32-bit interface)?
1098 // However, the 32-bit interface is WRITE ONLY, so that can't be it...
1099 // Also, the 68K CANNOT make use of the 32-bit interface, since its bus width is only 16-bits...
1100 // offset &= 0xFF3FFF;
1103 WriteLog("TOM: Reading byte at %06X for %s\n", offset, whoName[who]);
1106 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1107 return GPUReadByte(offset, who);
1108 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1109 return GPUReadByte(offset, who);
1110 /* else if ((offset >= 0xF00010) && (offset < 0xF00028))
1111 return OPReadByte(offset, who);*/
1112 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1113 return BlitterReadByte(offset, who);
1114 else if (offset == 0xF00050)
1115 return tomTimerPrescaler >> 8;
1116 else if (offset == 0xF00051)
1117 return tomTimerPrescaler & 0xFF;
1118 else if (offset == 0xF00052)
1119 return tomTimerDivider >> 8;
1120 else if (offset == 0xF00053)
1121 return tomTimerDivider & 0xFF;
1123 return tomRam8[offset & 0x3FFF];
1127 // TOM word access (read)
1129 uint16 TOMReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
1131 //???Is this needed???
1132 // offset &= 0xFF3FFF;
1134 WriteLog("TOM: Reading word at %06X for %s\n", offset, whoName[who]);
1136 if (offset >= 0xF02000 && offset <= 0xF020FF)
1137 WriteLog("TOM: Read attempted from GPU register file by %s (unimplemented)!\n", whoName[who]);
1139 if (offset == 0xF000E0)
1141 // For reading, should only return the lower 5 bits...
1142 uint16 data = (tom_jerry_int_pending << 4) | (tom_timer_int_pending << 3)
1143 | (tom_object_int_pending << 2) | (tom_gpu_int_pending << 1)
1144 | (tom_video_int_pending << 0);
1145 //WriteLog("tom: interrupt status is 0x%.4x \n",data);
1148 //Shoud be handled by the jaguar main loop now... And it is! ;-)
1149 /* else if (offset == 0xF00006) // VC
1150 // What if we're in interlaced mode?
1151 // According to docs, in non-interlace mode VC is ALWAYS even...
1152 // return (tom_scanline << 1);// + 1;
1153 //But it's causing Rayman to be fucked up... Why???
1154 //Because VC is even in NI mode when calling the OP! That's why!
1155 return (tom_scanline << 1) + 1;//*/
1157 // F00004 R/W -----xxx xxxxxxxx HC - horizontal count
1158 // -----x-- -------- (which half of the display)
1159 // ------xx xxxxxxxx (10-bit counter)
1161 // This is a kludge to get the HC working somewhat... What we really should do here
1162 // is check what the global time is at the time of the read and calculate the correct HC...
1164 else if (offset == 0xF00004)
1165 return rand() & 0x03FF;
1166 else if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE + 0x20))
1167 return GPUReadWord(offset, who);
1168 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE + 0x1000))
1169 return GPUReadWord(offset, who);
1170 /* else if ((offset >= 0xF00010) && (offset < 0xF00028))
1171 return OPReadWord(offset, who);*/
1172 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1173 return BlitterReadWord(offset, who);
1174 else if (offset == 0xF00050)
1175 return tomTimerPrescaler;
1176 else if (offset == 0xF00052)
1177 return tomTimerDivider;
1180 return (TOMReadByte(offset, who) << 8) | TOMReadByte(offset + 1, who);
1183 #define TOM_STRICT_MEMORY_ACCESS
1185 // TOM byte access (write)
1187 void TOMWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
1190 WriteLog("TOM: Writing byte %02X at %06X", data, offset);
1192 //???Is this needed???
1193 // Perhaps on the writes--32-bit writes that is! And masked with FF7FFF...
1194 #ifndef TOM_STRICT_MEMORY_ACCESS
1197 // "Fast" (32-bit only) write access to the GPU
1198 // if ((offset >= 0xF0A100) && (offset <= 0xF0BFFF))
1199 if ((offset >= 0xF08000) && (offset <= 0xF0BFFF))
1203 WriteLog(" -->[%06X] by %s\n", offset, whoName[who]);
1206 #ifdef TOM_STRICT_MEMORY_ACCESS
1207 // Sanity check ("Aww, there ain't no Sanity Clause...")
1208 if ((offset < 0xF00000) || (offset > 0xF03FFF))
1212 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1214 GPUWriteByte(offset, data, who);
1217 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1219 GPUWriteByte(offset, data, who);
1222 /* else if ((offset >= 0xF00010) && (offset < 0xF00028))
1224 OPWriteByte(offset, data, who);
1227 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1229 BlitterWriteByte(offset, data, who);
1232 else if (offset == 0xF00050)
1234 tomTimerPrescaler = (tomTimerPrescaler & 0x00FF) | (data << 8);
1238 else if (offset == 0xF00051)
1240 tomTimerPrescaler = (tomTimerPrescaler & 0xFF00) | data;
1244 else if (offset == 0xF00052)
1246 tomTimerDivider = (tomTimerDivider & 0x00FF) | (data << 8);
1250 else if (offset == 0xF00053)
1252 tomTimerDivider = (tomTimerDivider & 0xFF00) | data;
1256 else if (offset >= 0xF00400 && offset <= 0xF007FF) // CLUT (A & B)
1258 // Writing to one CLUT writes to the other
1259 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
1260 tomRam8[offset] = data, tomRam8[offset + 0x200] = data;
1263 tomRam8[offset & 0x3FFF] = data;
1267 // TOM word access (write)
1269 void TOMWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
1272 WriteLog("TOM: Writing byte %04X at %06X", data, offset);
1274 //???Is this needed??? Yes, but we need to be more vigilant than this.
1275 #ifndef TOM_STRICT_MEMORY_ACCESS
1278 // "Fast" (32-bit only) write access to the GPU
1279 // if ((offset >= 0xF0A100) && (offset <= 0xF0BFFF))
1280 if ((offset >= 0xF08000) && (offset <= 0xF0BFFF))
1284 WriteLog(" -->[%06X] by %s\n", offset, whoName[who]);
1287 #ifdef TOM_STRICT_MEMORY_ACCESS
1289 if ((offset < 0xF00000) || (offset > 0xF03FFF))
1293 if (offset == 0xF00000 + MEMCON1)
1294 WriteLog("TOM: Memory Configuration 1 written by %s: %04X\n", whoName[who], data);
1295 if (offset == 0xF00000 + MEMCON2)
1296 WriteLog("TOM: Memory Configuration 2 written by %s: %04X\n", whoName[who], data);
1297 if (offset >= 0xF02000 && offset <= 0xF020FF)
1298 WriteLog("TOM: Write attempted to GPU register file by %s (unimplemented)!\n", whoName[who]);
1300 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1302 GPUWriteWord(offset, data, who);
1305 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1307 GPUWriteWord(offset, data, who);
1310 //What's so special about this?
1311 /* else if ((offset >= 0xF00000) && (offset < 0xF00002))
1313 TOMWriteByte(offset, data >> 8);
1314 TOMWriteByte(offset+1, data & 0xFF);
1316 /* else if ((offset >= 0xF00010) && (offset < 0xF00028))
1318 OPWriteWord(offset, data, who);
1321 else if (offset == 0xF00050)
1323 tomTimerPrescaler = data;
1327 else if (offset == 0xF00052)
1329 tomTimerDivider = data;
1333 else if (offset == 0xF000E0)
1337 tom_video_int_pending = 0;
1339 tom_gpu_int_pending = 0;
1341 tom_object_int_pending = 0;
1343 tom_timer_int_pending = 0;
1345 tom_jerry_int_pending = 0;
1349 else if ((offset >= 0xF02200) && (offset <= 0xF0229F))
1351 BlitterWriteWord(offset, data, who);
1354 else if (offset >= 0xF00400 && offset <= 0xF007FE) // CLUT (A & B)
1356 // Writing to one CLUT writes to the other
1357 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
1358 // Watch out for unaligned writes here! (Not fixed yet)
1359 #warning "!!! Watch out for unaligned writes here !!! FIX !!!"
1360 SET16(tomRam8, offset, data);
1361 SET16(tomRam8, offset + 0x200, data);
1365 if (offset == 0x28) // VMODE (Why? Why not OBF?)
1366 //Actually, we should check to see if the Enable bit of VMODE is set before doing this... !!! FIX !!!
1367 #warning "Actually, we should check to see if the Enable bit of VMODE is set before doing this... !!! FIX !!!"
1368 objectp_running = 1;
1370 if (offset >= 0x30 && offset <= 0x4E)
1371 data &= 0x07FF; // These are (mostly) 11-bit registers
1372 if (offset == 0x2E || offset == 0x36 || offset == 0x54)
1373 data &= 0x03FF; // These are all 10-bit registers
1375 // Fix a lockup bug... :-P
1376 TOMWriteByte(0xF00000 | offset, data >> 8, who);
1377 TOMWriteByte(0xF00000 | (offset+1), data & 0xFF, who);
1380 WriteLog("TOM: Vertical Display Begin written by %s: %u\n", whoName[who], data);
1382 WriteLog("TOM: Vertical Display End written by %s: %u\n", whoName[who], data);
1384 WriteLog("TOM: Vertical Period written by %s: %u (%sinterlaced)\n", whoName[who], data, (data & 0x01 ? "non-" : ""));
1386 WriteLog("TOM: Horizontal Display Begin 1 written by %s: %u\n", whoName[who], data);
1388 WriteLog("TOM: Horizontal Display End written by %s: %u\n", whoName[who], data);
1390 WriteLog("TOM: Horizontal Period written by %s: %u (+1*2 = %u)\n", whoName[who], data, (data + 1) * 2);
1392 WriteLog("TOM: Vertical Blank Begin written by %s: %u\n", whoName[who], data);
1394 WriteLog("TOM: Vertical Blank End written by %s: %u\n", whoName[who], data);
1396 WriteLog("TOM: Vertical Sync written by %s: %u\n", whoName[who], data);
1398 WriteLog("TOM: Vertical Interrupt written by %s: %u\n", whoName[who], data);
1400 WriteLog("TOM: Horizontal Blank Begin written by %s: %u\n", whoName[who], data);
1402 WriteLog("TOM: Horizontal Blank End written by %s: %u\n", whoName[who], data);
1403 if (offset == VMODE)
1404 WriteLog("TOM: Video Mode written by %s: %04X. PWIDTH = %u, MODE = %s, flags:%s%s (VC = %u)\n", whoName[who], data, ((data >> 9) & 0x07) + 1, videoMode_to_str[(data & MODE) >> 1], (data & BGEN ? " BGEN" : ""), (data & VARMOD ? " VARMOD" : ""), GET16(tomRam8, VC));
1406 WriteLog("TOM: PIT0 written by %s: %u\n", whoName[who], data);
1408 WriteLog("TOM: PIT1 written by %s: %u\n", whoName[who], data);
1409 //if (offset == INT1)
1410 // WriteLog("TOM: CPU Interrupt Control written by %s: $%04X (%s%s%s%s%s)\n", whoName[who], data, (data & 0x01 ? "Video" : ""), (data & 0x02 ? " GPU" : ""), (data & 0x04 ? " OP" : ""), (data & 0x08 ? " TOMPIT" : ""), (data & 0x10 ? " Jerry" : ""));
1412 // detect screen resolution changes
1413 //This may go away in the future, if we do the virtualized screen thing...
1414 //This may go away soon!
1415 // TOM Shouldn't be mucking around with this, it's up to the host system to properly
1416 // handle this kind of crap.
1417 // NOTE: This is needed somehow, need to get rid of the dependency on this crap.
1418 #warning "!!! Need to get rid of this dependency !!!"
1420 if ((offset >= 0x28) && (offset <= 0x4F))
1422 uint32 width = TOMGetVideoModeWidth(), height = TOMGetVideoModeHeight();
1424 if ((width != tomWidth) || (height != tomHeight))
1426 tomWidth = width, tomHeight = height;
1428 #warning "!!! TOM: ResizeScreen commented out !!!"
1429 // No need to resize anything, since we're prepared for this...
1430 // if (vjs.renderType == RT_NORMAL)
1431 // ResizeScreen(tomWidth, tomHeight);
1437 int TOMIRQEnabled(int irq)
1439 // This is the correct byte in big endian... D'oh!
1440 // return jaguar_byte_read(0xF000E1) & (1 << irq);
1441 return tomRam8[INT1 + 1/*0xE1*/] & (1 << irq);
1445 // TOM Programmable Interrupt Timer handler
1446 // NOTE: TOM's PIT is only enabled if the prescaler is != 0
1447 // The PIT only generates an interrupt when it counts down to zero, not when loaded!
1449 void TOMPITCallback(void);
1451 void TOMResetPIT(void)
1453 #ifndef NEW_TIMER_SYSTEM
1454 //Probably should *add* this amount to the counter to retain cycle accuracy! !!! FIX !!! [DONE]
1455 //Also, why +1??? 'Cause that's what it says in the JTRM...!
1456 //There is a small problem with this approach: If both the prescaler and the divider are equal
1457 //to $FFFF then the counter won't be large enough to handle it. !!! FIX !!!
1458 if (tom_timer_prescaler)
1459 tom_timer_counter += (1 + tom_timer_prescaler) * (1 + tom_timer_divider);
1460 // WriteLog("tom: reseting timer to 0x%.8x (%i)\n",tom_timer_counter,tom_timer_counter);
1462 // Need to remove previous timer from the queue, if it exists...
1463 RemoveCallback(TOMPITCallback);
1465 if (tomTimerPrescaler)
1467 double usecs = (float)(tomTimerPrescaler + 1) * (float)(tomTimerDivider + 1) * RISC_CYCLE_IN_USEC;
1468 SetCallbackTime(TOMPITCallback, usecs);
1474 // TOM Programmable Interrupt Timer handler
1475 // NOTE: TOM's PIT is only enabled if the prescaler is != 0
1477 //NOTE: This is only used by the old execution code... Safe to remove
1478 // once the timer system is stable.
1479 void TOMExecPIT(uint32 cycles)
1481 if (tomTimerPrescaler)
1483 tomTimerCounter -= cycles;
1485 if (tomTimerCounter <= 0)
1487 TOMSetPendingTimerInt();
1488 GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE); // GPUSetIRQLine does the 'IRQ enabled' checking
1490 if (TOMIRQEnabled(IRQ_TIMER))
1491 m68k_set_irq(2); // Cause a 68000 IPL 2...
1498 void TOMPITCallback(void)
1500 // INT1_RREG |= 0x08; // Set TOM PIT interrupt pending
1501 TOMSetPendingTimerInt();
1502 GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE); // It does the 'IRQ enabled' checking
1504 // if (INT1_WREG & 0x08)
1505 if (TOMIRQEnabled(IRQ_TIMER))
1506 m68k_set_irq(2); // Generate a 68K IPL 2...