5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
6 // Cleanups and endian wrongness amelioration by James L. Hammons
7 // Note: Endian wrongness probably stems from the MAME origins of this emu and
8 // the braindead way in which MAME handles memory. :-)
10 // Note: TOM has only a 16K memory space
12 // ------------------------------------------------------------
13 // TOM REGISTERS (Mapped by Aaron Giles)
14 // ------------------------------------------------------------
15 // F00000-F0FFFF R/W xxxxxxxx xxxxxxxx Internal Registers
16 // F00000 R/W -x-xx--- xxxxxxxx MEMCON1 - memory config reg 1
17 // -x------ -------- (CPU32 - is the CPU 32bits?)
18 // ---xx--- -------- (IOSPEED - external I/O clock cycles)
19 // -------- x------- (FASTROM - reduces ROM clock cycles)
20 // -------- -xx----- (DRAMSPEED - sets RAM clock cycles)
21 // -------- ---xx--- (ROMSPEED - sets ROM clock cycles)
22 // -------- -----xx- (ROMWIDTH - sets width of ROM: 8,16,32,64 bits)
23 // -------- -------x (ROMHI - controls ROM mapping)
24 // F00002 R/W --xxxxxx xxxxxxxx MEMCON2 - memory config reg 2
25 // --x----- -------- (HILO - image display bit order)
26 // ---x---- -------- (BIGEND - big endian addressing?)
27 // ----xxxx -------- (REFRATE - DRAM refresh rate)
28 // -------- xx------ (DWIDTH1 - DRAM1 width: 8,16,32,64 bits)
29 // -------- --xx---- (COLS1 - DRAM1 columns: 256,512,1024,2048)
30 // -------- ----xx-- (DWIDTH0 - DRAM0 width: 8,16,32,64 bits)
31 // -------- ------xx (COLS0 - DRAM0 columns: 256,512,1024,2048)
32 // F00004 R/W -----xxx xxxxxxxx HC - horizontal count
33 // -----x-- -------- (which half of the display)
34 // ------xx xxxxxxxx (10-bit counter)
35 // F00006 R/W ----xxxx xxxxxxxx VC - vertical count
36 // ----x--- -------- (which field is being generated)
37 // -----xxx xxxxxxxx (11-bit counter)
38 // F00008 R -----xxx xxxxxxxx LPH - light pen horizontal position
39 // F0000A R -----xxx xxxxxxxx LPV - light pen vertical position
40 // F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
41 // F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
42 // F00026 W -------- -------x OBF - object processor flag
43 // F00028 W ----xxxx xxxxxxxx VMODE - video mode
44 // W ----xxx- -------- (PWIDTH1-8 - width of pixel in video clock cycles)
45 // W -------x -------- (VARMOD - enable variable color resolution)
46 // W -------- x------- (BGEN - clear line buffer to BG color)
47 // W -------- -x------ (CSYNC - enable composite sync on VSYNC)
48 // W -------- --x----- (BINC - local border color if INCEN)
49 // W -------- ---x---- (INCEN - encrustation enable)
50 // W -------- ----x--- (GENLOCK - enable genlock)
51 // W -------- -----xx- (MODE - CRY16,RGB24,DIRECT16,RGB16)
52 // W -------- -------x (VIDEN - enables video)
53 // F0002A W xxxxxxxx xxxxxxxx BORD1 - border color (red/green)
54 // F0002C W -------- xxxxxxxx BORD2 - border color (blue)
55 // F0002E W ------xx xxxxxxxx HP - horizontal period
56 // F00030 W -----xxx xxxxxxxx HBB - horizontal blanking begin
57 // F00032 W -----xxx xxxxxxxx HBE - horizontal blanking end
58 // F00034 W -----xxx xxxxxxxx HSYNC - horizontal sync
59 // F00036 W ------xx xxxxxxxx HVS - horizontal vertical sync
60 // F00038 W -----xxx xxxxxxxx HDB1 - horizontal display begin 1
61 // F0003A W -----xxx xxxxxxxx HDB2 - horizontal display begin 2
62 // F0003C W -----xxx xxxxxxxx HDE - horizontal display end
63 // F0003E W -----xxx xxxxxxxx VP - vertical period
64 // F00040 W -----xxx xxxxxxxx VBB - vertical blanking begin
65 // F00042 W -----xxx xxxxxxxx VBE - vertical blanking end
66 // F00044 W -----xxx xxxxxxxx VS - vertical sync
67 // F00046 W -----xxx xxxxxxxx VDB - vertical display begin
68 // F00048 W -----xxx xxxxxxxx VDE - vertical display end
69 // F0004A W -----xxx xxxxxxxx VEB - vertical equalization begin
70 // F0004C W -----xxx xxxxxxxx VEE - vertical equalization end
71 // F0004E W -----xxx xxxxxxxx VI - vertical interrupt
72 // F00050 W xxxxxxxx xxxxxxxx PIT0 - programmable interrupt timer 0
73 // F00052 W xxxxxxxx xxxxxxxx PIT1 - programmable interrupt timer 1
74 // F00054 W ------xx xxxxxxxx HEQ - horizontal equalization end
75 // F00058 W xxxxxxxx xxxxxxxx BG - background color
76 // F000E0 R/W ---xxxxx ---xxxxx INT1 - CPU interrupt control register
77 // ---x---- -------- (C_JERCLR - clear pending Jerry ints)
78 // ----x--- -------- (C_PITCLR - clear pending PIT ints)
79 // -----x-- -------- (C_OPCLR - clear pending object processor ints)
80 // ------x- -------- (C_GPUCLR - clear pending graphics processor ints)
81 // -------x -------- (C_VIDCLR - clear pending video timebase ints)
82 // -------- ---x---- (C_JERENA - enable Jerry ints)
83 // -------- ----x--- (C_PITENA - enable PIT ints)
84 // -------- -----x-- (C_OPENA - enable object processor ints)
85 // -------- ------x- (C_GPUENA - enable graphics processor ints)
86 // -------- -------x (C_VIDENA - enable video timebase ints)
87 // F000E2 W -------- -------- INT2 - CPU interrupt resume register
88 // F00400-F005FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table A
89 // F00600-F007FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table B
90 // F00800-F00D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer A
91 // F01000-F0159F R/W xxxxxxxx xxxxxxxx LBUF - line buffer B
92 // F01800-F01D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer currently selected
93 // ------------------------------------------------------------
94 // F02000-F021FF R/W xxxxxxxx xxxxxxxx GPU control registers
95 // F02100 R/W xxxxxxxx xxxxxxxx G_FLAGS - GPU flags register
96 // R/W x------- -------- (DMAEN - DMA enable)
97 // R/W -x------ -------- (REGPAGE - register page)
98 // W --x----- -------- (G_BLITCLR - clear blitter interrupt)
99 // W ---x---- -------- (G_OPCLR - clear object processor int)
100 // W ----x--- -------- (G_PITCLR - clear PIT interrupt)
101 // W -----x-- -------- (G_JERCLR - clear Jerry interrupt)
102 // W ------x- -------- (G_CPUCLR - clear CPU interrupt)
103 // R/W -------x -------- (G_BLITENA - enable blitter interrupt)
104 // R/W -------- x------- (G_OPENA - enable object processor int)
105 // R/W -------- -x------ (G_PITENA - enable PIT interrupt)
106 // R/W -------- --x----- (G_JERENA - enable Jerry interrupt)
107 // R/W -------- ---x---- (G_CPUENA - enable CPU interrupt)
108 // R/W -------- ----x--- (IMASK - interrupt mask)
109 // R/W -------- -----x-- (NEGA_FLAG - ALU negative)
110 // R/W -------- ------x- (CARRY_FLAG - ALU carry)
111 // R/W -------- -------x (ZERO_FLAG - ALU zero)
112 // F02104 W -------- ----xxxx G_MTXC - matrix control register
113 // W -------- ----x--- (MATCOL - column/row major)
114 // W -------- -----xxx (MATRIX3-15 - matrix width)
115 // F02108 W ----xxxx xxxxxx-- G_MTXA - matrix address register
116 // F0210C W -------- -----xxx G_END - data organization register
117 // W -------- -----x-- (BIG_INST - big endian instruction fetch)
118 // W -------- ------x- (BIG_PIX - big endian pixels)
119 // W -------- -------x (BIG_IO - big endian I/O)
120 // F02110 R/W xxxxxxxx xxxxxxxx G_PC - GPU program counter
121 // F02114 R/W xxxxxxxx xx-xxxxx G_CTRL - GPU control/status register
122 // R xxxx---- -------- (VERSION - GPU version code)
123 // R/W ----x--- -------- (BUS_HOG - hog the bus!)
124 // R/W -----x-- -------- (G_BLITLAT - blitter interrupt latch)
125 // R/W ------x- -------- (G_OPLAT - object processor int latch)
126 // R/W -------x -------- (G_PITLAT - PIT interrupt latch)
127 // R/W -------- x------- (G_JERLAT - Jerry interrupt latch)
128 // R/W -------- -x------ (G_CPULAT - CPU interrupt latch)
129 // R/W -------- ---x---- (SINGLE_GO - single step one instruction)
130 // R/W -------- ----x--- (SINGLE_STEP - single step mode)
131 // R/W -------- -----x-- (FORCEINT0 - cause interrupt 0 on GPU)
132 // R/W -------- ------x- (CPUINT - send GPU interrupt to CPU)
133 // R/W -------- -------x (GPUGO - enable GPU execution)
134 // F02118-F0211B R/W xxxxxxxx xxxxxxxx G_HIDATA - high data register
135 // F0211C-F0211F R xxxxxxxx xxxxxxxx G_REMAIN - divide unit remainder
136 // F0211C W -------- -------x G_DIVCTRL - divide unit control
137 // W -------- -------x (DIV_OFFSET - 1=16.16 divide, 0=32-bit divide)
138 // ------------------------------------------------------------
140 // ------------------------------------------------------------
141 // F02200-F022FF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Blitter registers
142 // F02200 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_BASE - A1 base register
143 // F02204 W -------- ---xxxxx -xxxxxxx xxxxx-xx A1_FLAGS - A1 flags register
144 // W -------- ---x---- -------- -------- (YSIGNSUB - invert sign of Y delta)
145 // W -------- ----x--- -------- -------- (XSIGNSUB - invert sign of X delta)
146 // W -------- -----x-- -------- -------- (Y add control)
147 // W -------- ------xx -------- -------- (X add control)
148 // W -------- -------- -xxxxxx- -------- (width in 6-bit floating point)
149 // W -------- -------- -------x xx------ (ZOFFS1-6 - Z data offset)
150 // W -------- -------- -------- --xxx--- (PIXEL - pixel size)
151 // W -------- -------- -------- ------xx (PITCH1-4 - data phrase pitch)
152 // F02208 W -xxxxxxx xxxxxxxx -xxxxxxx xxxxxxxx A1_CLIP - A1 clipping size
153 // W -xxxxxxx xxxxxxxx -------- -------- (height)
154 // W -------- -------- -xxxxxxx xxxxxxxx (width)
155 // F0220C R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_PIXEL - A1 pixel pointer
156 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel value)
157 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel value)
158 // F02210 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_STEP - A1 step value
159 // W xxxxxxxx xxxxxxxx -------- -------- (Y step value)
160 // W -------- -------- xxxxxxxx xxxxxxxx (X step value)
161 // F02214 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FSTEP - A1 step fraction value
162 // W xxxxxxxx xxxxxxxx -------- -------- (Y step fraction value)
163 // W -------- -------- xxxxxxxx xxxxxxxx (X step fraction value)
164 // F02218 R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FPIXEL - A1 pixel pointer fraction
165 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel fraction value)
166 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel fraction value)
167 // F0221C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_INC - A1 increment
168 // W xxxxxxxx xxxxxxxx -------- -------- (Y increment)
169 // W -------- -------- xxxxxxxx xxxxxxxx (X increment)
170 // F02220 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A1_FINC - A1 increment fraction
171 // W xxxxxxxx xxxxxxxx -------- -------- (Y increment fraction)
172 // W -------- -------- xxxxxxxx xxxxxxxx (X increment fraction)
173 // F02224 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_BASE - A2 base register
174 // F02228 W -------- ---xxxxx -xxxxxxx xxxxx-xx A2_FLAGS - A2 flags register
175 // W -------- ---x---- -------- -------- (YSIGNSUB - invert sign of Y delta)
176 // W -------- ----x--- -------- -------- (XSIGNSUB - invert sign of X delta)
177 // W -------- -----x-- -------- -------- (Y add control)
178 // W -------- ------xx -------- -------- (X add control)
179 // W -------- -------- -xxxxxx- -------- (width in 6-bit floating point)
180 // W -------- -------- -------x xx------ (ZOFFS1-6 - Z data offset)
181 // W -------- -------- -------- --xxx--- (PIXEL - pixel size)
182 // W -------- -------- -------- ------xx (PITCH1-4 - data phrase pitch)
183 // F0222C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_MASK - A2 window mask
184 // F02230 R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_PIXEL - A2 pixel pointer
185 // R/W xxxxxxxx xxxxxxxx -------- -------- (Y pixel value)
186 // R/W -------- -------- xxxxxxxx xxxxxxxx (X pixel value)
187 // F02234 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx A2_STEP - A2 step value
188 // W xxxxxxxx xxxxxxxx -------- -------- (Y step value)
189 // W -------- -------- xxxxxxxx xxxxxxxx (X step value)
190 // F02238 W -xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_CMD - command register
191 // W -x------ -------- -------- -------- (SRCSHADE - modify source intensity)
192 // W --x----- -------- -------- -------- (BUSHI - hi priority bus)
193 // W ---x---- -------- -------- -------- (BKGWREN - writeback destination)
194 // W ----x--- -------- -------- -------- (DCOMPEN - write inhibit from data comparator)
195 // W -----x-- -------- -------- -------- (BCOMPEN - write inhibit from bit coparator)
196 // W ------x- -------- -------- -------- (CMPDST - compare dest instead of src)
197 // W -------x xxx----- -------- -------- (logical operation)
198 // W -------- ---xxx-- -------- -------- (ZMODE - Z comparator mode)
199 // W -------- ------x- -------- -------- (ADDDSEL - select sum of src & dst)
200 // W -------- -------x -------- -------- (PATDSEL - select pattern data)
201 // W -------- -------- x------- -------- (TOPNEN - enable carry into top intensity nibble)
202 // W -------- -------- -x------ -------- (TOPBEN - enable carry into top intensity byte)
203 // W -------- -------- --x----- -------- (ZBUFF - enable Z updates in inner loop)
204 // W -------- -------- ---x---- -------- (GOURD - enable gouraud shading in inner loop)
205 // W -------- -------- ----x--- -------- (DSTA2 - reverses A2/A1 roles)
206 // W -------- -------- -----x-- -------- (UPDA2 - add A2 step to A2 in outer loop)
207 // W -------- -------- ------x- -------- (UPDA1 - add A1 step to A1 in outer loop)
208 // W -------- -------- -------x -------- (UPDA1F - add A1 fraction step to A1 in outer loop)
209 // W -------- -------- -------- x------- (diagnostic use)
210 // W -------- -------- -------- -x------ (CLIP_A1 - clip A1 to window)
211 // W -------- -------- -------- --x----- (DSTWRZ - enable dest Z write in inner loop)
212 // W -------- -------- -------- ---x---- (DSTENZ - enable dest Z read in inner loop)
213 // W -------- -------- -------- ----x--- (DSTEN - enables dest data read in inner loop)
214 // W -------- -------- -------- -----x-- (SRCENX - enable extra src read at start of inner)
215 // W -------- -------- -------- ------x- (SRCENZ - enables source Z read in inner loop)
216 // W -------- -------- -------- -------x (SRCEN - enables source data read in inner loop)
217 // F02238 R xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_CMD - status register
218 // R xxxxxxxx xxxxxxxx -------- -------- (inner count)
219 // R -------- -------- xxxxxxxx xxxxxx-- (diagnostics)
220 // R -------- -------- -------- ------x- (STOPPED - when stopped in collision detect)
221 // R -------- -------- -------- -------x (IDLE - when idle)
222 // F0223C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_COUNT - counters register
223 // W xxxxxxxx xxxxxxxx -------- -------- (outer loop count)
224 // W -------- -------- xxxxxxxx xxxxxxxx (inner loop count)
225 // F02240-F02247 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCD - source data register
226 // F02248-F0224F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_DSTD - destination data register
227 // F02250-F02257 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_DSTZ - destination Z register
228 // F02258-F0225F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCZ1 - source Z register 1
229 // F02260-F02267 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_SRCZ2 - source Z register 2
230 // F02268-F0226F W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_PATD - pattern data register
231 // F02270 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_IINC - intensity increment
232 // F02274 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_ZINC - Z increment
233 // F02278 W -------- -------- -------- -----xxx B_STOP - collision control
234 // W -------- -------- -------- -----x-- (STOPEN - enable blitter collision stops)
235 // W -------- -------- -------- ------x- (ABORT - abort after stop)
236 // W -------- -------- -------- -------x (RESUME - resume after stop)
237 // F0227C W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I3 - intensity 3
238 // F02280 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I2 - intensity 2
239 // F02284 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I1 - intensity 1
240 // F02288 W -------- xxxxxxxx xxxxxxxx xxxxxxxx B_I0 - intensity 0
241 // F0228C W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z3 - Z3
242 // F02290 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z2 - Z2
243 // F02294 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z1 - Z1
244 // F02298 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z0 - Z0
245 // ------------------------------------------------------------
254 // TOM registers (offset from $F00000)
261 #define MODE 0x0006 // Line buffer to video generator mode
262 #define BGEN 0x0080 // Background enable (CRY & RGB16 only)
263 #define VARMOD 0x0100 // Mixed CRY/RGB16 mode (only works in MODE 0!)
264 #define PWIDTH 0x0E00 // Pixel width in video clock cycles (value written + 1)
265 #define HP 0x2E // Values range from 1 - 1024 (value written + 1)
271 #define VP 0x3E // Value ranges from 1 - 2048 (value written + 1)
281 // Arbitrary video cutoff values (i.e., first/last visible spots on a TV, in HC ticks)
282 /*#define LEFT_VISIBLE_HC 208
283 #define RIGHT_VISIBLE_HC 1528//*/
284 #define LEFT_VISIBLE_HC 208
285 #define RIGHT_VISIBLE_HC 1488
287 //This can be defined in the makefile as well...
288 //(It's easier to do it here, though...)
291 extern uint32 jaguar_mainRom_crc32;
292 extern uint8 objectp_running;
294 static uint8 * tom_ram_8;
295 uint32 tom_width, tom_height, tom_real_internal_width;
296 static uint32 tom_timer_prescaler;
297 static uint32 tom_timer_divider;
298 static int32 tom_timer_counter;
299 //uint32 tom_scanline;
300 //uint32 hblankWidthInPixels = 0;
301 uint16 tom_jerry_int_pending, tom_timer_int_pending, tom_object_int_pending,
302 tom_gpu_int_pending, tom_video_int_pending;
303 uint16 * tom_cry_rgb_mix_lut;
305 static char * videoMode_to_str[8] =
306 { "16 BPP CRY", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB",
307 "Mixed mode", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB" };
309 typedef void (render_xxx_scanline_fn)(int16 *);
311 // Private function prototypes
313 void tom_render_16bpp_cry_scanline(int16 * backbuffer);
314 void tom_render_24bpp_scanline(int16 * backbuffer);
315 void tom_render_16bpp_direct_scanline(int16 * backbuffer);
316 void tom_render_16bpp_rgb_scanline(int16 * backbuffer);
317 void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer);
319 void tom_render_16bpp_cry_stretch_scanline(int16 * backbuffer);
320 void tom_render_24bpp_stretch_scanline(int16 * backbuffer);
321 void tom_render_16bpp_direct_stretch_scanline(int16 * backbuffer);
322 void tom_render_16bpp_rgb_stretch_scanline(int16 * backbuffer);
323 void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 * backbuffer);
325 render_xxx_scanline_fn * scanline_render_normal[]=
327 tom_render_16bpp_cry_scanline,
328 tom_render_24bpp_scanline,
329 tom_render_16bpp_direct_scanline,
330 tom_render_16bpp_rgb_scanline,
331 tom_render_16bpp_cry_rgb_mix_scanline,
332 tom_render_24bpp_scanline,
333 tom_render_16bpp_direct_scanline,
334 tom_render_16bpp_rgb_scanline
337 render_xxx_scanline_fn * scanline_render_stretch[]=
339 tom_render_16bpp_cry_stretch_scanline,
340 tom_render_24bpp_stretch_scanline,
341 tom_render_16bpp_direct_stretch_scanline,
342 tom_render_16bpp_rgb_stretch_scanline,
343 tom_render_16bpp_cry_rgb_mix_stretch_scanline,
344 tom_render_24bpp_stretch_scanline,
345 tom_render_16bpp_direct_stretch_scanline,
346 tom_render_16bpp_rgb_stretch_scanline,
349 render_xxx_scanline_fn * scanline_render[8];
352 // Screen info for various games...
355 TOM: Horizontal Display End written by M68K: 1727
356 TOM: Horizontal Display Begin 1 written by M68K: 123
357 TOM: Vertical Display Begin written by M68K: 25
358 TOM: Vertical Display End written by M68K: 2047
359 TOM: Video Mode written by M68K: 0EC1. PWIDTH = 8, MODE = 16 BPP CRY, flags: BGEN (VC = 5)
360 Also does PWIDTH = 4...
361 Vertical resolution: 238 lines
364 TOM: Horizontal Display End written by M68K: 1727
365 TOM: Horizontal Display Begin 1 written by M68K: 123
366 TOM: Vertical Display Begin written by M68K: 25
367 TOM: Vertical Display End written by M68K: 2047
368 TOM: Vertical Interrupt written by M68K: 507
369 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 92)
370 TOM: Horizontal Display Begin 1 written by M68K: 208
371 TOM: Horizontal Display End written by M68K: 1670
372 Display starts at 31, then 52!
373 Vertical resolution: 238 lines
376 TOM: Horizontal Display End written by M68K: 1727
377 TOM: Horizontal Display Begin 1 written by M68K: 123
378 TOM: Vertical Display Begin written by M68K: 25
379 TOM: Vertical Display End written by M68K: 2047
380 TOM: Video Mode written by GPU: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 4)
381 TOM: Video Mode written by GPU: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 508)
382 Display starts at 31 (PWIDTH = 4), 24 (PWIDTH = 5)
385 TOM: Vertical Interrupt written by M68K: 2047
386 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 0)
387 TOM: Horizontal Display End written by M68K: 1727
388 TOM: Horizontal Display Begin 1 written by M68K: 123
389 TOM: Vertical Display Begin written by M68K: 25
390 TOM: Vertical Display End written by M68K: 2047
391 TOM: Vertical Interrupt written by M68K: 507
392 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 369)
393 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 510)
394 TOM: Video Mode written by M68K: 06C3. PWIDTH = 4, MODE = 24 BPP RGB, flags: BGEN (VC = 510)
396 Vertical resolution: 238 lines
397 [Seems to be a problem between the horizontal positioning of the 16-bit CRY & 24-bit RGB]
400 TOM: Horizontal Period written by M68K: 844 (+1*2 = 1690)
401 TOM: Horizontal Blank Begin written by M68K: 1713
402 TOM: Horizontal Blank End written by M68K: 125
403 TOM: Horizontal Display End written by M68K: 1696
404 TOM: Horizontal Display Begin 1 written by M68K: 166
405 TOM: Vertical Period written by M68K: 523 (non-interlaced)
406 TOM: Vertical Blank End written by M68K: 24
407 TOM: Vertical Display Begin written by M68K: 46
408 TOM: Vertical Display End written by M68K: 496
409 TOM: Vertical Blank Begin written by M68K: 500
410 TOM: Vertical Sync written by M68K: 517
411 TOM: Vertical Interrupt written by M68K: 497
412 TOM: Video Mode written by M68K: 04C1. PWIDTH = 3, MODE = 16 BPP CRY, flags: BGEN (VC = 270)
416 TOM: Horizontal Display End written by M68K: 1727
417 TOM: Horizontal Display Begin 1 written by M68K: 123
418 TOM: Vertical Display Begin written by M68K: 25
419 TOM: Vertical Display End written by M68K: 2047
420 TOM: Vertical Interrupt written by M68K: 507
421 TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 9)
424 TOM: Horizontal Display End written by M68K: 1823
425 TOM: Horizontal Display Begin 1 written by M68K: 45
426 TOM: Vertical Display Begin written by M68K: 40
427 TOM: Vertical Display End written by M68K: 2047
428 TOM: Vertical Interrupt written by M68K: 491
429 TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 398)
430 Display starts at 11 (123 - 45 = 78, 78 / 4 = 19 pixels to skip)
431 Width is 417, so maybe width of 379 would be good (starting at 123, ending at 1639)
432 Vertical resolution: 238 lines
435 TOM: Horizontal Display End written by M68K: 1727
436 TOM: Horizontal Display Begin 1 written by M68K: 188
437 TOM: Vertical Display Begin written by M68K: 1
438 TOM: Vertical Display End written by M68K: 2047
439 TOM: Vertical Interrupt written by M68K: 483
440 TOM: Video Mode written by M68K: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 99)
441 Width would be 303 with above scheme, but border width would be 13 pixels
444 Vertical resolution: 238 lines
448 void tom_calc_cry_rgb_mix_lut(void)
450 memory_malloc_secure((void **)&tom_cry_rgb_mix_lut, 2 * 0x10000, "CRY/RGB mixed mode LUT");
452 for (uint32 i=0; i<0x10000; i++)
459 color = (color & 0x007C00) | ((color & 0x00003E0) >> 5) | ((color & 0x0000001F) << 5);
463 uint32 chrm = (color & 0xF000) >> 12,
464 chrl = (color & 0x0F00) >> 8,
466 uint16 red = (((uint32)redcv[chrm][chrl]) * y) >> 11,
467 green = (((uint32)greencv[chrm][chrl]) * y) >> 11,
468 blue = (((uint32)bluecv[chrm][chrl]) * y) >> 11;
469 color = (red << 10) | (green << 5) | blue;
471 tom_cry_rgb_mix_lut[i] = color;
475 void tom_set_pending_jerry_int(void)
477 tom_jerry_int_pending = 1;
480 void tom_set_pending_timer_int(void)
482 tom_timer_int_pending = 1;
485 void tom_set_pending_object_int(void)
487 tom_object_int_pending = 1;
490 void tom_set_pending_gpu_int(void)
492 tom_gpu_int_pending = 1;
495 void tom_set_pending_video_int(void)
497 tom_video_int_pending = 1;
500 uint8 * tom_get_ram_pointer(void)
505 uint8 tom_getVideoMode(void)
507 uint16 vmode = GET16(tom_ram_8, VMODE);
508 return ((vmode & VARMOD) >> 6) | ((vmode & MODE) >> 1);
511 //Used in only one place (and for debug purposes): OBJECTP.CPP
512 uint16 tom_get_vdb(void)
514 // This in NOT VDB!!!
515 // return GET16(tom_ram_8, VBE);
516 return GET16(tom_ram_8, VDB);
520 // 16 BPP CRY/RGB mixed mode rendering
522 void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer)
524 uint16 width = tom_width;
525 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
527 //New stuff--restrict our drawing...
528 uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
529 //NOTE: May have to check HDB2 as well!
530 int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
533 current_line_buffer += 2 * -startPos;
535 backbuffer += 2 * startPos, width -= startPos;
539 uint16 color = (*current_line_buffer++) << 8;
540 color |= *current_line_buffer++;
541 *backbuffer++ = tom_cry_rgb_mix_lut[color];
547 // 16 BPP CRY mode rendering
549 void tom_render_16bpp_cry_scanline(int16 * backbuffer)
551 uint16 width = tom_width;
552 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
554 //New stuff--restrict our drawing...
555 uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
556 //NOTE: May have to check HDB2 as well!
557 int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
560 current_line_buffer += 2 * -startPos;
562 backbuffer += 2 * startPos, width -= startPos;
566 uint16 color = (*current_line_buffer++) << 8;
567 color |= *current_line_buffer++;
569 uint32 chrm = (color & 0xF000) >> 12,
570 chrl = (color & 0x0F00) >> 8,
571 y = (color & 0x00FF);
573 uint16 red = (((uint32)redcv[chrm][chrl]) * y) >> 11,
574 green = (((uint32)greencv[chrm][chrl]) * y) >> 11,
575 blue = (((uint32)bluecv[chrm][chrl]) * y) >> 11;
577 *backbuffer++ = (red << 10) | (green << 5) | blue;
583 // 24 BPP mode rendering
585 void tom_render_24bpp_scanline(int16 * backbuffer)
587 uint16 width = tom_width;
588 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
590 //New stuff--restrict our drawing...
591 uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
592 //NOTE: May have to check HDB2 as well!
593 int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
596 current_line_buffer += 4 * -startPos;
598 backbuffer += 2 * startPos, width -= startPos;
602 // This is NOT a good 8 -> 5 bit RGB conversion! (It saturates values below 8
603 // to zero and throws away almost *half* the color resolution!)
604 uint16 green = (*current_line_buffer++) >> 3;
605 uint16 red = (*current_line_buffer++) >> 3;
606 current_line_buffer++;
607 uint16 blue = (*current_line_buffer++) >> 3;
608 *backbuffer++ = (red << 10) | (green << 5) | blue;
613 //Seems to me that this is NOT a valid mode--the JTRM seems to imply that you would need
614 //extra hardware outside of the Jaguar console to support this!
616 // 16 BPP direct mode rendering
618 void tom_render_16bpp_direct_scanline(int16 * backbuffer)
620 uint16 width = tom_width;
621 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
625 uint16 color = (*current_line_buffer++) << 8;
626 color |= *current_line_buffer++;
627 *backbuffer++ = color >> 1;
633 // 16 BPP RGB mode rendering
635 void tom_render_16bpp_rgb_scanline(int16 * backbuffer)
637 uint16 width = tom_width;
638 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
640 //New stuff--restrict our drawing...
641 uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
642 //NOTE: May have to check HDB2 as well!
643 int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
646 current_line_buffer += 2 * -startPos;
648 backbuffer += 2 * startPos, width -= startPos;
652 uint16 color = (*current_line_buffer++) << 8;
653 color = (color | *current_line_buffer++) >> 1;
654 color = (color&0x7C00) | ((color&0x03E0) >> 5) | ((color&0x001F) << 5);
655 *backbuffer++ = color;
660 // This stuff may just go away by itself, especially if we do some
661 // good old OpenGL goodness...
663 void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 *backbuffer)
665 uint16 width=tom_width;
666 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
671 color=*current_line_buffer++;
673 color|=*current_line_buffer++;
674 *backbuffer++=tom_cry_rgb_mix_lut[color];
675 current_line_buffer+=2;
680 void tom_render_16bpp_cry_stretch_scanline(int16 *backbuffer)
682 uint32 chrm, chrl, y;
684 uint16 width=tom_width;
685 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
690 color=*current_line_buffer++;
692 color|=*current_line_buffer++;
694 chrm = (color & 0xF000) >> 12;
695 chrl = (color & 0x0F00) >> 8;
696 y = (color & 0x00FF);
698 uint16 red = ((((uint32)redcv[chrm][chrl])*y)>>11);
699 uint16 green = ((((uint32)greencv[chrm][chrl])*y)>>11);
700 uint16 blue = ((((uint32)bluecv[chrm][chrl])*y)>>11);
703 color2=*current_line_buffer++;
705 color2|=*current_line_buffer++;
707 chrm = (color2 & 0xF000) >> 12;
708 chrl = (color2 & 0x0F00) >> 8;
709 y = (color2 & 0x00FF);
711 uint16 red2 = ((((uint32)redcv[chrm][chrl])*y)>>11);
712 uint16 green2 = ((((uint32)greencv[chrm][chrl])*y)>>11);
713 uint16 blue2 = ((((uint32)bluecv[chrm][chrl])*y)>>11);
716 green=(green+green2)>>1;
717 blue=(blue+blue2)>>1;
719 *backbuffer++=(red<<10)|(green<<5)|blue;
724 void tom_render_24bpp_stretch_scanline(int16 *backbuffer)
726 uint16 width=tom_width;
727 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
731 uint16 green=*current_line_buffer++;
732 uint16 red=*current_line_buffer++;
733 /*uint16 nc=*/current_line_buffer++;
734 uint16 blue=*current_line_buffer++;
738 *backbuffer++=(red<<10)|(green<<5)|blue;
739 current_line_buffer+=4;
744 void tom_render_16bpp_direct_stretch_scanline(int16 *backbuffer)
746 uint16 width=tom_width;
747 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
751 uint16 color=*current_line_buffer++;
753 color|=*current_line_buffer++;
756 current_line_buffer+=2;
761 void tom_render_16bpp_rgb_stretch_scanline(int16 *backbuffer)
763 uint16 width=tom_width;
764 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
768 uint16 color1=*current_line_buffer++;
770 color1|=*current_line_buffer++;
772 uint16 color2=*current_line_buffer++;
774 color2|=*current_line_buffer++;
776 uint16 red=(((color1&0x7c00)>>10)+((color2&0x7c00)>>10))>>1;
777 uint16 green=(((color1&0x00003e0)>>5)+((color2&0x00003e0)>>5))>>1;
778 uint16 blue=(((color1&0x0000001f))+((color2&0x0000001f)))>>1;
780 color1=(red<<10)|(blue<<5)|green;
781 *backbuffer++=color1;
787 // Process a single scanline
789 void tom_exec_scanline(int16 * backbuffer, int32 scanline, bool render)
793 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
794 uint8 bgHI = tom_ram_8[BG], bgLO = tom_ram_8[BG + 1];
796 // Clear line buffer with BG
797 if (GET16(tom_ram_8, VMODE) & BGEN) // && (CRY or RGB16)...
798 for(uint32 i=0; i<720; i++)
799 *current_line_buffer++ = bgHI, *current_line_buffer++ = bgLO;
801 OPProcessList(scanline, render);
802 scanline_render[tom_getVideoMode()](backbuffer);
807 // TOM initialization
813 //This should be done by JERRY! pcm_init();
814 memory_malloc_secure((void **)&tom_ram_8, 0x4000, "TOM RAM");
816 // Setup the non-stretchy scanline rendering...
817 memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
818 tom_calc_cry_rgb_mix_lut();
824 //This should be done by JERRY! pcm_done();
826 WriteLog("TOM: Resolution %i x %i %s\n", tom_getVideoModeWidth(), tom_getVideoModeHeight(),
827 videoMode_to_str[tom_getVideoMode()]);
828 // WriteLog("\ntom: object processor:\n");
829 // WriteLog("tom: pointer to object list: 0x%.8x\n",op_get_list_pointer());
830 // WriteLog("tom: INT1=0x%.2x%.2x\n",TOMReadByte(0xf000e0),TOMReadByte(0xf000e1));
833 memory_free(tom_ram_8);
836 /*uint32 tom_getHBlankWidthInPixels(void)
838 return hblankWidthInPixels;
841 uint32 tom_getVideoModeWidth(void)
843 //These widths are pretty bogus. Should use HDB1/2 & HDE/HBB & PWIDTH to calc the width...
844 // uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 166 };
845 //Temporary, for testing Doom...
846 // uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 332 };
848 // Note that the following PWIDTH values have the following pixel aspect ratios:
849 // PWIDTH = 1 -> 0.25:1 (1:4) pixels (X:Y ratio)
850 // PWIDTH = 2 -> 0.50:1 (1:2) pixels
851 // PWIDTH = 3 -> 0.75:1 (3:4) pixels
852 // PWIDTH = 4 -> 1.00:1 (1:1) pixels
853 // PWIDTH = 5 -> 1.25:1 (5:4) pixels
854 // PWIDTH = 6 -> 1.50:1 (3:2) pixels
855 // PWIDTH = 7 -> 1.75:1 (7:4) pixels
856 // PWIDTH = 8 -> 2.00:1 (2:1) pixels
858 // Also note that the JTRM says that PWIDTH of 4 gives pixels that are "about" square--
859 // this implies that the other modes have pixels that are *not* square!
860 // Also, I seriously doubt that you will see any games that use PWIDTH = 1!
862 // NOTE: Even though the PWIDTH value is + 1, here we're using a zero-based index and
863 // so we don't bother to add one...
864 // return width[(GET16(tom_ram_8, VMODE) & PWIDTH) >> 9];
866 // Now, we just calculate it...
867 /* uint16 hdb1 = GET16(tom_ram_8, HDB1), hde = GET16(tom_ram_8, HDE),
868 hbb = GET16(tom_ram_8, HBB), pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
869 // return ((hbb < hde ? hbb : hde) - hdb1) / pwidth;
870 //Temporary, for testing Doom...
871 return ((hbb < hde ? hbb : hde) - hdb1) / (pwidth == 8 ? 4 : pwidth);*/
873 // To make it easier to make a quasi-fixed display size, we restrict the viewing
874 // area to an arbitrary range of the Horizontal Count.
875 uint16 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
876 // return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / pwidth;
877 //Temporary, for testing Doom...
878 return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 8 ? 4 : pwidth);
880 // More speculating...
881 // According to the JTRM, the number of potential pixels across is given by the
882 // Horizontal Period (HP - in NTSC this is 845). The Horizontal Count counts from
883 // zero to this value twice per scanline (the high bit is set on the second count).
884 // HBE and HBB define the absolute "black" limits of the screen, while HDB1/2 and
885 // HDE determine the extent of the OP "on" time. I.e., when the OP is turned on by
886 // HDB1, it starts fetching the line from position 0 in LBUF.
888 // The trick, it would seem, is to figure out how long the typical visible scanline
889 // of a TV is in HP ticks and limit the visible area to that (divided by PWIDTH, of
890 // course). Using that length, we can establish an "absolute left display limit" with
891 // which to measure HBB & HDB1/2 against when rendering LBUF (i.e., if HDB1 is 20 ticks
892 // to the right of the ALDL and PWIDTH is 4, then start writing the LBUF starting at
893 // backbuffer + 5 pixels).
895 // That's basically what we're doing now...!
898 // *** SPECULATION ***
899 // It might work better to virtualize the height settings, i.e., set the vertical
900 // height at 240 lines and clip using the VDB and VDE/VP registers...
901 // Same with the width... [Width is pretty much virtualized now.]
903 uint32 tom_getVideoModeHeight(void)
905 // uint16 vmode = GET16(tom_ram_8, VMODE);
906 uint16 vbe = GET16(tom_ram_8, VBE);
907 uint16 vbb = GET16(tom_ram_8, VBB);
908 // uint16 vdb = GET16(tom_ram_8, VDB);
909 // uint16 vde = GET16(tom_ram_8, VDE);
910 // uint16 vp = GET16(tom_ram_8, VP);
912 /* if (vde == 0xFFFF)
915 // return 227;//WAS:(vde/*-vdb*/) >> 1;
916 // The video mode height probably works this way:
917 // VC counts from 0 to VP. VDB starts the OP. Either when
918 // VDE is reached or VP, the OP is stopped. Let's try it...
919 // Also note that we're conveniently ignoring interlaced display modes...!
920 // return ((vde > vp ? vp : vde) - vdb) >> 1;
921 // return ((vde > vbb ? vbb : vde) - vdb) >> 1;
922 //Let's try from the Vertical Blank interval...
924 return (vbb - vbe) >> 1; // Again, doesn't take interlacing into account...
933 extern bool hardwareTypeNTSC;
937 //This should be done by JERRY! pcm_reset();
939 memset(tom_ram_8, 0x00, 0x4000);
941 if (hardwareTypeNTSC)
943 SET16(tom_ram_8, MEMCON1, 0x1861);
944 SET16(tom_ram_8, MEMCON2, 0x35CC);
945 SET16(tom_ram_8, HP, 844); // Horizontal Period (1-based; HP=845)
946 SET16(tom_ram_8, HBB, 1713); // Horizontal Blank Begin
947 SET16(tom_ram_8, HBE, 125); // Horizontal Blank End
948 SET16(tom_ram_8, HDE, 1665); // Horizontal Display End
949 SET16(tom_ram_8, HDB1, 203); // Horizontal Display Begin 1
950 SET16(tom_ram_8, VP, 523); // Vertical Period (1-based; in this case VP = 524)
951 SET16(tom_ram_8, VBE, 24); // Vertical Blank End
952 SET16(tom_ram_8, VDB, 38); // Vertical Display Begin
953 SET16(tom_ram_8, VDE, 518); // Vertical Display End
954 SET16(tom_ram_8, VBB, 500); // Vertical Blank Begin
955 SET16(tom_ram_8, VS, 517); // Vertical Sync
956 SET16(tom_ram_8, VMODE, 0x06C1);
960 SET16(tom_ram_8, MEMCON1, 0x1861);
961 SET16(tom_ram_8, MEMCON2, 0x35CC);
962 SET16(tom_ram_8, HP, 850); // Horizontal Period
963 SET16(tom_ram_8, HBB, 1711); // Horizontal Blank Begin
964 SET16(tom_ram_8, HBE, 158); // Horizontal Blank End
965 SET16(tom_ram_8, HDE, 1665); // Horizontal Display End
966 SET16(tom_ram_8, HDB1, 203); // Horizontal Display Begin 1
967 SET16(tom_ram_8, VP, 623); // Vertical Period (1-based; in this case VP = 624)
968 SET16(tom_ram_8, VBE, 34); // Vertical Blank End
969 SET16(tom_ram_8, VDB, 38); // Vertical Display Begin
970 SET16(tom_ram_8, VDE, 518); // Vertical Display End
971 SET16(tom_ram_8, VBB, 600); // Vertical Blank Begin
972 SET16(tom_ram_8, VS, 618); // Vertical Sync
973 SET16(tom_ram_8, VMODE, 0x06C1);
976 tom_width = tom_real_internal_width = 0;
981 // hblankWidthInPixels = GET16(tom_ram_8, HDB1) >> 1;
983 tom_jerry_int_pending = 0;
984 tom_timer_int_pending = 0;
985 tom_object_int_pending = 0;
986 tom_gpu_int_pending = 0;
987 tom_video_int_pending = 0;
989 tom_timer_prescaler = 0;
990 tom_timer_divider = 0;
991 tom_timer_counter = 0;
992 memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
996 // TOM byte access (read)
998 uint8 TOMReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
1000 //???Is this needed???
1001 // It seems so. Perhaps it's the +$8000 offset being written to (32-bit interface)?
1002 // However, the 32-bit interface is WRITE ONLY, so that can't be it...
1003 // Also, the 68K CANNOT make use of the 32-bit interface, since its bus width is only 16-bits...
1004 // offset &= 0xFF3FFF;
1007 WriteLog("TOM: Reading byte at %06X\n", offset);
1010 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1011 return GPUReadByte(offset, who);
1012 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1013 return GPUReadByte(offset, who);
1014 else if ((offset >= 0xF00010) && (offset < 0xF00028))
1015 return OPReadByte(offset, who);
1016 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1017 return BlitterReadByte(offset, who);
1018 else if (offset == 0xF00050)
1019 return tom_timer_prescaler >> 8;
1020 else if (offset == 0xF00051)
1021 return tom_timer_prescaler & 0xFF;
1022 else if (offset == 0xF00052)
1023 return tom_timer_divider >> 8;
1024 else if (offset == 0xF00053)
1025 return tom_timer_divider & 0xFF;
1027 return tom_ram_8[offset & 0x3FFF];
1031 // TOM word access (read)
1033 uint16 TOMReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
1035 //???Is this needed???
1036 // offset &= 0xFF3FFF;
1038 WriteLog("TOM: Reading word at %06X\n", offset);
1040 if (offset >= 0xF02000 && offset <= 0xF020FF)
1041 WriteLog("TOM: Read attempted from GPU register file by %s (unimplemented)!\n", whoName[who]);
1043 if (offset == 0xF000E0)
1045 uint16 data = (tom_jerry_int_pending << 4) | (tom_timer_int_pending << 3)
1046 | (tom_object_int_pending << 2) | (tom_gpu_int_pending << 1)
1047 | (tom_video_int_pending << 0);
1048 //WriteLog("tom: interrupt status is 0x%.4x \n",data);
1051 //Shoud be handled by the jaguar main loop now... And it is! ;-)
1052 /* else if (offset == 0xF00006) // VC
1053 // What if we're in interlaced mode?
1054 // According to docs, in non-interlace mode VC is ALWAYS even...
1055 // return (tom_scanline << 1);// + 1;
1056 //But it's causing Rayman to be fucked up... Why???
1057 //Because VC is even in NI mode when calling the OP! That's why!
1058 return (tom_scanline << 1) + 1;//*/
1059 else if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1060 return GPUReadWord(offset, who);
1061 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1062 return GPUReadWord(offset, who);
1063 else if ((offset >= 0xF00010) && (offset < 0xF00028))
1064 return OPReadWord(offset, who);
1065 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1066 return BlitterReadWord(offset, who);
1067 else if (offset == 0xF00050)
1068 return tom_timer_prescaler;
1069 else if (offset == 0xF00052)
1070 return tom_timer_divider;
1073 return (TOMReadByte(offset, who) << 8) | TOMReadByte(offset + 1, who);
1077 // TOM byte access (write)
1079 void TOMWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
1081 //???Is this needed???
1082 // Perhaps on the writes--32-bit writes that is! And masked with FF7FFF...
1086 WriteLog("TOM: Writing byte %02X at %06X\n", data, offset);
1089 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1091 GPUWriteByte(offset, data, who);
1094 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1096 GPUWriteByte(offset, data, who);
1099 else if ((offset >= 0xF00010) && (offset < 0xF00028))
1101 OPWriteByte(offset, data, who);
1104 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
1106 BlitterWriteByte(offset, data, who);
1109 else if (offset == 0xF00050)
1111 tom_timer_prescaler = (tom_timer_prescaler & 0x00FF) | (data << 8);
1115 else if (offset == 0xF00051)
1117 tom_timer_prescaler = (tom_timer_prescaler & 0xFF00) | data;
1121 else if (offset == 0xF00052)
1123 tom_timer_divider = (tom_timer_divider & 0x00FF) | (data << 8);
1127 else if (offset == 0xF00053)
1129 tom_timer_divider = (tom_timer_divider & 0xFF00) | data;
1133 else if (offset >= 0xF00400 && offset <= 0xF007FF) // CLUT (A & B)
1135 // Writing to one CLUT writes to the other
1136 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
1137 tom_ram_8[offset] = data, tom_ram_8[offset + 0x200] = data;
1140 tom_ram_8[offset & 0x3FFF] = data;
1144 // TOM word access (write)
1146 void TOMWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
1148 //???Is this needed???
1152 WriteLog("TOM: Writing word %04X at %06X\n", data, offset);
1154 if (offset == 0xF00000 + MEMCON1)
1155 WriteLog("TOM: Memory Configuration 1 written by %s: %04X\n", whoName[who], data);
1156 if (offset == 0xF00000 + MEMCON2)
1157 WriteLog("TOM: Memory Configuration 2 written by %s: %04X\n", whoName[who], data);
1158 if (offset >= 0xF02000 && offset <= 0xF020FF)
1159 WriteLog("TOM: Write attempted to GPU register file by %s (unimplemented)!\n", whoName[who]);
1161 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1163 GPUWriteWord(offset, data, who);
1166 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1168 GPUWriteWord(offset, data, who);
1171 //What's so special about this?
1172 /* else if ((offset >= 0xF00000) && (offset < 0xF00002))
1174 TOMWriteByte(offset, data >> 8);
1175 TOMWriteByte(offset+1, data & 0xFF);
1177 else if ((offset >= 0xF00010) && (offset < 0xF00028))
1179 OPWriteWord(offset, data, who);
1182 else if (offset == 0xF00050)
1184 tom_timer_prescaler = data;
1188 else if (offset == 0xF00052)
1190 tom_timer_divider = data;
1194 else if (offset == 0xF000E0)
1198 tom_video_int_pending = 0;
1200 tom_gpu_int_pending = 0;
1202 tom_object_int_pending = 0;
1204 tom_timer_int_pending = 0;
1206 tom_jerry_int_pending = 0;
1208 else if ((offset >= 0xF02200) && (offset <= 0xF0229F))
1210 BlitterWriteWord(offset, data, who);
1213 else if (offset >= 0xF00400 && offset <= 0xF007FE) // CLUT (A & B)
1215 // Writing to one CLUT writes to the other
1216 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
1217 // Watch out for unaligned writes here! (Not fixed yet)
1218 SET16(tom_ram_8, offset, data), SET16(tom_ram_8, offset + 0x200, data);
1222 if (offset == 0x28) // VMODE (Why? Why not OBF?)
1223 objectp_running = 1;
1225 if (offset >= 0x30 && offset <= 0x4E)
1226 data &= 0x07FF; // These are (mostly) 11-bit registers
1227 if (offset == 0x2E || offset == 0x36 || offset == 0x54)
1228 data &= 0x03FF; // These are all 10-bit registers
1230 TOMWriteByte(offset, data >> 8, who);
1231 TOMWriteByte(offset+1, data & 0xFF, who);
1234 WriteLog("TOM: Vertical Display Begin written by %s: %u\n", whoName[who], data);
1236 WriteLog("TOM: Vertical Display End written by %s: %u\n", whoName[who], data);
1238 WriteLog("TOM: Vertical Period written by %s: %u (%sinterlaced)\n", whoName[who], data, (data & 0x01 ? "non-" : ""));
1240 WriteLog("TOM: Horizontal Display Begin 1 written by %s: %u\n", whoName[who], data);
1242 WriteLog("TOM: Horizontal Display End written by %s: %u\n", whoName[who], data);
1244 WriteLog("TOM: Horizontal Period written by %s: %u (+1*2 = %u)\n", whoName[who], data, (data + 1) * 2);
1246 WriteLog("TOM: Vertical Blank Begin written by %s: %u\n", whoName[who], data);
1248 WriteLog("TOM: Vertical Blank End written by %s: %u\n", whoName[who], data);
1250 WriteLog("TOM: Vertical Sync written by %s: %u\n", whoName[who], data);
1252 WriteLog("TOM: Vertical Interrupt written by %s: %u\n", whoName[who], data);
1254 WriteLog("TOM: Horizontal Blank Begin written by %s: %u\n", whoName[who], data);
1256 WriteLog("TOM: Horizontal Blank End written by %s: %u\n", whoName[who], data);
1257 if (offset == VMODE)
1258 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(tom_ram_8, VC));
1260 // detect screen resolution changes
1261 //This may go away in the future, if we do the virtualized screen thing...
1262 //This may go away soon!
1263 if ((offset >= 0x28) && (offset <= 0x4F))
1265 uint32 width = tom_getVideoModeWidth(), height = tom_getVideoModeHeight();
1266 tom_real_internal_width = width;
1268 if ((width != tom_width) || (height != tom_height))
1270 // extern SDL_Surface * surface, * mainSurface;
1271 // extern Uint32 mainSurfaceFlags;
1272 // static char window_title[256];
1274 tom_width = width, tom_height = height;
1275 ResizeScreen(tom_width, tom_height);
1276 /* SDL_FreeSurface(surface);
1277 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, tom_width, tom_height,
1278 16, 0x7C00, 0x03E0, 0x001F, 0);
1279 if (surface == NULL)
1281 WriteLog("TOM: Could not create primary SDL surface: %s", SDL_GetError());
1285 sprintf(window_title, "Virtual Jaguar (%i x %i)", (int)tom_width, (int)tom_height);
1286 mainSurface = SDL_SetVideoMode(tom_width, tom_height, 16, mainSurfaceFlags);
1288 if (mainSurface == NULL)
1290 WriteLog("Joystick: SDL is unable to set the video mode: %s\n", SDL_GetError());
1294 SDL_WM_SetCaption(window_title, window_title);//*/
1299 int tom_irq_enabled(int irq)
1301 // This is the correct byte in big endian... D'oh!
1302 // return jaguar_byte_read(0xF000E1) & (1 << irq);
1303 return tom_ram_8[INT1 + 1/*0xE1*/] & (1 << irq);
1307 /*void tom_set_irq_latch(int irq, int enabled)
1309 tom_ram_8[0xE0] = (tom_ram_8[0xE0] & (~(1<<irq))) | (enabled ? (1<<irq) : 0);
1313 /*uint16 tom_irq_control_reg(void)
1315 return (tom_ram_8[0xE0] << 8) | tom_ram_8[0xE1];
1318 void tom_reset_timer(void)
1320 if (!tom_timer_prescaler || !tom_timer_divider)
1321 tom_timer_counter = 0;
1323 //Probably should *add* this amount to the counter to retain cycle accuracy! !!! FIX !!!
1325 tom_timer_counter = (1 + tom_timer_prescaler) * (1 + tom_timer_divider);
1326 // WriteLog("tom: reseting timer to 0x%.8x (%i)\n",tom_timer_counter,tom_timer_counter);
1330 // TOM Programmable Interrupt Timer handler
1332 void tom_pit_exec(uint32 cycles)
1334 if (tom_timer_counter > 0)
1336 tom_timer_counter -= cycles;
1338 if (tom_timer_counter <= 0)
1340 tom_set_pending_timer_int();
1341 GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE);
1342 if (tom_irq_enabled(IRQ_TIMER) && jaguar_interrupt_handler_is_valid(64))
1343 m68k_set_irq(7); // Cause a 68000 NMI...