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 // ------------------------------------------------------------
253 // TOM registers (offset from $F00000)
260 #define MODE 0x0006 // Line buffer to video generator mode
261 #define BGEN 0x0080 // Background enable (CRY & RGB16 only)
262 #define VARMOD 0x0100 // Mixed CRY/RGB16 mode (only works in MODE 0!)
263 #define PWIDTH 0x0E00 // Pixel width in video clock cycles (value written + 1)
264 #define HP 0x2E // Values range from 1 - 1024 (value written + 1)
270 #define VP 0x3E // Value ranges from 1 - 2048 (value written + 1)
280 //This can be defined in the makefile as well...
281 //(It's easier to do it here, though...)
284 extern uint32 jaguar_mainRom_crc32;
285 extern uint8 objectp_running;
287 static uint8 * tom_ram_8;
288 uint32 tom_width, tom_height, tom_real_internal_width;
289 static uint32 tom_timer_prescaler;
290 static uint32 tom_timer_divider;
291 static int32 tom_timer_counter;
292 //uint32 tom_scanline;
293 //uint32 hblankWidthInPixels = 0;
294 uint16 tom_jerry_int_pending, tom_timer_int_pending, tom_object_int_pending,
295 tom_gpu_int_pending, tom_video_int_pending;
296 uint16 * tom_cry_rgb_mix_lut;
298 static char * videoMode_to_str[8] =
299 { "16 BPP CRY", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB",
300 "Mixed mode", "24 BPP RGB", "16 BPP DIRECT", "16 BPP RGB" };
302 typedef void (render_xxx_scanline_fn)(int16 *);
304 // Private function prototypes
306 void tom_render_16bpp_cry_scanline(int16 * backbuffer);
307 void tom_render_24bpp_scanline(int16 * backbuffer);
308 void tom_render_16bpp_direct_scanline(int16 * backbuffer);
309 void tom_render_16bpp_rgb_scanline(int16 * backbuffer);
310 void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer);
312 void tom_render_16bpp_cry_stretch_scanline(int16 * backbuffer);
313 void tom_render_24bpp_stretch_scanline(int16 * backbuffer);
314 void tom_render_16bpp_direct_stretch_scanline(int16 * backbuffer);
315 void tom_render_16bpp_rgb_stretch_scanline(int16 * backbuffer);
316 void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 * backbuffer);
318 render_xxx_scanline_fn * scanline_render_normal[]=
320 tom_render_16bpp_cry_scanline,
321 tom_render_24bpp_scanline,
322 tom_render_16bpp_direct_scanline,
323 tom_render_16bpp_rgb_scanline,
324 tom_render_16bpp_cry_rgb_mix_scanline,
325 tom_render_24bpp_scanline,
326 tom_render_16bpp_direct_scanline,
327 tom_render_16bpp_rgb_scanline
330 render_xxx_scanline_fn * scanline_render_stretch[]=
332 tom_render_16bpp_cry_stretch_scanline,
333 tom_render_24bpp_stretch_scanline,
334 tom_render_16bpp_direct_stretch_scanline,
335 tom_render_16bpp_rgb_stretch_scanline,
336 tom_render_16bpp_cry_rgb_mix_stretch_scanline,
337 tom_render_24bpp_stretch_scanline,
338 tom_render_16bpp_direct_stretch_scanline,
339 tom_render_16bpp_rgb_stretch_scanline,
342 render_xxx_scanline_fn * scanline_render[8];
345 void tom_calc_cry_rgb_mix_lut(void)
347 memory_malloc_secure((void **)&tom_cry_rgb_mix_lut, 2 * 0x10000, "CRY/RGB mixed mode LUT");
349 for (uint32 i=0; i<0x10000; i++)
356 color = (color & 0x007C00) | ((color & 0x00003E0) >> 5) | ((color & 0x0000001F) << 5);
360 uint32 chrm = (color & 0xF000) >> 12,
361 chrl = (color & 0x0F00) >> 8,
363 uint16 red = (((uint32)redcv[chrm][chrl]) * y) >> 11,
364 green = (((uint32)greencv[chrm][chrl]) * y) >> 11,
365 blue = (((uint32)bluecv[chrm][chrl]) * y) >> 11;
366 color = (red << 10) | (green << 5) | blue;
368 tom_cry_rgb_mix_lut[i] = color;
372 void tom_set_pending_jerry_int(void)
374 tom_jerry_int_pending = 1;
377 void tom_set_pending_timer_int(void)
379 tom_timer_int_pending = 1;
382 void tom_set_pending_object_int(void)
384 tom_object_int_pending = 1;
387 void tom_set_pending_gpu_int(void)
389 tom_gpu_int_pending = 1;
392 void tom_set_pending_video_int(void)
394 tom_video_int_pending = 1;
397 uint8 * tom_get_ram_pointer(void)
402 uint8 tom_getVideoMode(void)
404 uint16 vmode = GET16(tom_ram_8, VMODE);
405 return ((vmode & VARMOD) >> 6) | ((vmode & MODE) >> 1);
408 //Used in only one place (and for debug purposes): OBJECTP.CPP
409 uint16 tom_get_vdb(void)
411 // This in NOT VDB!!!
412 // return GET16(tom_ram_8, VBE);
413 return GET16(tom_ram_8, VDB);
417 // 16 BPP CRY/RGB mixed mode rendering
419 void tom_render_16bpp_cry_rgb_mix_scanline(int16 * backbuffer)
421 uint16 width = tom_width;
422 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
426 uint16 color = (*current_line_buffer++) << 8;
427 color |= *current_line_buffer++;
428 *backbuffer++ = tom_cry_rgb_mix_lut[color];
434 // 16 BPP CRY mode rendering
436 void tom_render_16bpp_cry_scanline(int16 * backbuffer)
438 uint16 width = tom_width;
439 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
443 uint16 color = (*current_line_buffer++) << 8;
444 color |= *current_line_buffer++;
446 uint32 chrm = (color & 0xF000) >> 12,
447 chrl = (color & 0x0F00) >> 8,
448 y = (color & 0x00FF);
450 uint16 red = (((uint32)redcv[chrm][chrl]) * y) >> 11,
451 green = (((uint32)greencv[chrm][chrl]) * y) >> 11,
452 blue = (((uint32)bluecv[chrm][chrl]) * y) >> 11;
454 *backbuffer++ = (red << 10) | (green << 5) | blue;
460 // 24 BPP mode rendering
462 void tom_render_24bpp_scanline(int16 * backbuffer)
464 uint16 width = tom_width;
465 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
469 uint16 green = (*current_line_buffer++) >> 3;
470 uint16 red = (*current_line_buffer++) >> 3;
471 current_line_buffer++;
472 uint16 blue = (*current_line_buffer++) >> 3;
473 *backbuffer++ = (red << 10) | (green << 5) | blue;
478 //Seems to me that this is NOT a valid mode--the JTRM seems to imply that you would need
479 //extra hardware outside of the Jaguar console to support this!
481 // 16 BPP direct mode rendering
483 void tom_render_16bpp_direct_scanline(int16 * backbuffer)
485 uint16 width = tom_width;
486 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
490 uint16 color = (*current_line_buffer++) << 8;
491 color |= *current_line_buffer++;
492 *backbuffer++ = color >> 1;
498 // 16 BPP RGB mode rendering
500 void tom_render_16bpp_rgb_scanline(int16 * backbuffer)
502 uint16 width = tom_width;
503 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
507 uint16 color = (*current_line_buffer++) << 8;
508 color = (color | *current_line_buffer++) >> 1;
509 color = (color&0x7C00) | ((color&0x03E0) >> 5) | ((color&0x001F) << 5);
510 *backbuffer++ = color;
515 // This stuff may just go away by itself, especially if we do some
516 // good old OpenGL goodness...
518 void tom_render_16bpp_cry_rgb_mix_stretch_scanline(int16 *backbuffer)
520 uint16 width=tom_width;
521 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
526 color=*current_line_buffer++;
528 color|=*current_line_buffer++;
529 *backbuffer++=tom_cry_rgb_mix_lut[color];
530 current_line_buffer+=2;
535 void tom_render_16bpp_cry_stretch_scanline(int16 *backbuffer)
537 uint32 chrm, chrl, y;
539 uint16 width=tom_width;
540 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
545 color=*current_line_buffer++;
547 color|=*current_line_buffer++;
549 chrm = (color & 0xF000) >> 12;
550 chrl = (color & 0x0F00) >> 8;
551 y = (color & 0x00FF);
553 uint16 red = ((((uint32)redcv[chrm][chrl])*y)>>11);
554 uint16 green = ((((uint32)greencv[chrm][chrl])*y)>>11);
555 uint16 blue = ((((uint32)bluecv[chrm][chrl])*y)>>11);
558 color2=*current_line_buffer++;
560 color2|=*current_line_buffer++;
562 chrm = (color2 & 0xF000) >> 12;
563 chrl = (color2 & 0x0F00) >> 8;
564 y = (color2 & 0x00FF);
566 uint16 red2 = ((((uint32)redcv[chrm][chrl])*y)>>11);
567 uint16 green2 = ((((uint32)greencv[chrm][chrl])*y)>>11);
568 uint16 blue2 = ((((uint32)bluecv[chrm][chrl])*y)>>11);
571 green=(green+green2)>>1;
572 blue=(blue+blue2)>>1;
574 *backbuffer++=(red<<10)|(green<<5)|blue;
579 void tom_render_24bpp_stretch_scanline(int16 *backbuffer)
581 uint16 width=tom_width;
582 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
586 uint16 green=*current_line_buffer++;
587 uint16 red=*current_line_buffer++;
588 /*uint16 nc=*/current_line_buffer++;
589 uint16 blue=*current_line_buffer++;
593 *backbuffer++=(red<<10)|(green<<5)|blue;
594 current_line_buffer+=4;
599 void tom_render_16bpp_direct_stretch_scanline(int16 *backbuffer)
601 uint16 width=tom_width;
602 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
606 uint16 color=*current_line_buffer++;
608 color|=*current_line_buffer++;
611 current_line_buffer+=2;
616 void tom_render_16bpp_rgb_stretch_scanline(int16 *backbuffer)
618 uint16 width=tom_width;
619 uint8 *current_line_buffer=(uint8*)&tom_ram_8[0x1800];
623 uint16 color1=*current_line_buffer++;
625 color1|=*current_line_buffer++;
627 uint16 color2=*current_line_buffer++;
629 color2|=*current_line_buffer++;
631 uint16 red=(((color1&0x7c00)>>10)+((color2&0x7c00)>>10))>>1;
632 uint16 green=(((color1&0x00003e0)>>5)+((color2&0x00003e0)>>5))>>1;
633 uint16 blue=(((color1&0x0000001f))+((color2&0x0000001f)))>>1;
635 color1=(red<<10)|(blue<<5)|green;
636 *backbuffer++=color1;
642 // Process a single scanline
644 void tom_exec_scanline(int16 * backbuffer, int32 scanline, bool render)
648 uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
649 uint8 bgHI = tom_ram_8[BG], bgLO = tom_ram_8[BG + 1];
651 // Clear line buffer with BG
652 if (GET16(tom_ram_8, VMODE) & BGEN) // && (CRY or RGB16)...
653 for(uint32 i=0; i<720; i++)
654 *current_line_buffer++ = bgHI, *current_line_buffer++ = bgLO;
656 OPProcessList(scanline, render);
657 scanline_render[tom_getVideoMode()](backbuffer);
661 uint32 TOMGetSDLScreenPitch(void)
663 extern SDL_Surface * surface;
665 return surface->pitch;
669 // TOM initialization
675 //This should be done by JERRY! pcm_init();
676 memory_malloc_secure((void **)&tom_ram_8, 0x4000, "TOM RAM");
678 // Setup the non-stretchy scanline rendering...
679 memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
680 tom_calc_cry_rgb_mix_lut();
686 //This should be done by JERRY! pcm_done();
688 WriteLog("TOM: Resolution %i x %i %s\n", tom_getVideoModeWidth(), tom_getVideoModeHeight(),
689 videoMode_to_str[tom_getVideoMode()]);
690 // WriteLog("\ntom: object processor:\n");
691 // WriteLog("tom: pointer to object list: 0x%.8x\n",op_get_list_pointer());
692 // WriteLog("tom: INT1=0x%.2x%.2x\n",TOMReadByte(0xf000e0),TOMReadByte(0xf000e1));
695 memory_free(tom_ram_8);
698 /*uint32 tom_getHBlankWidthInPixels(void)
700 return hblankWidthInPixels;
703 uint32 tom_getVideoModeWidth(void)
705 //These widths are pretty bogus. Should use HDB1/2 & HDE/HBB & PWIDTH to calc the width...
706 uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 166 };
707 //Temporary, for testing Doom...
708 // uint32 width[8] = { 1330, 665, 443, 332, 266, 222, 190, 332 };
710 // Note that the following PWIDTH values have the following pixel aspect ratios:
711 // PWIDTH = 1 -> 0.25:1 pixels (X:Y ratio)
712 // PWIDTH = 2 -> 0.50:1 pixels
713 // PWIDTH = 3 -> 0.75:1 pixels
714 // PWIDTH = 4 -> 1.00:1 pixels
715 // PWIDTH = 5 -> 1.25:1 pixels
716 // PWIDTH = 6 -> 1.50:1 pixels
717 // PWIDTH = 7 -> 1.75:1 pixels
718 // PWIDTH = 8 -> 2.00:1 pixels
720 // Also note that the JTRM says that PWIDTH of 4 gives pixels that are "about" square--
721 // this implies that the other modes have pixels that are *not* square!
722 // Also, I seriously doubt that you will see any games that use PWIDTH = 1!
724 // NOTE: Even though the PWIDTH value is + 1, here we're using a zero-based index and
725 // so we don't bother to add one...
726 // return width[(GET16(tom_ram_8, VMODE) & PWIDTH) >> 9];
728 // Now, we just calculate it...
729 uint16 hdb1 = GET16(tom_ram_8, HDB1), hde = GET16(tom_ram_8, HDE),
730 hbb = GET16(tom_ram_8, HBB), pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
731 return ((hbb < hde ? hbb : hde) - hdb1) / pwidth;
733 // More speculating...
734 // According to the JTRM, the number of potential pixels across is given by the
735 // Horizontal Period (HP - in NTSC this is 845). The Horizontal Count counts from
736 // zero to this value twice per scanline (the high bit is set on the second count).
737 // HBE and HBB define the absolute "black" limits of the screen, while HDB1/2 and
738 // HDE determine the extent of the OP "on" time. I.e., when the OP is turned on by
739 // HDB1, it starts fetching the line from position 0 in LBUF.
741 // The trick, it would seem, is to figure out how long the typical visible scanline
742 // of a TV is in HP ticks and limit the visible area to that (divided by PWIDTH, of
743 // course). Using that length, we can establish an "absolute left display limit" with
744 // which to measure HBB & HDB1/2 against when rendering LBUF (i.e., if HDB1 is 20 ticks
745 // to the right of the ALDL and PWIDTH is 4, then start writing the LBUF starting at
746 // backbuffer + 5 pixels).
749 // *** SPECULATION ***
750 // It might work better to virtualize the height settings, i.e., set the vertical
751 // height at 240 lines and clip using the VDB and VDE/VP registers...
752 // Same with the width...
754 uint32 tom_getVideoModeHeight(void)
756 // uint16 vmode = GET16(tom_ram_8, VMODE);
757 uint16 vbe = GET16(tom_ram_8, VBE);
758 uint16 vbb = GET16(tom_ram_8, VBB);
759 // uint16 vdb = GET16(tom_ram_8, VDB);
760 // uint16 vde = GET16(tom_ram_8, VDE);
761 // uint16 vp = GET16(tom_ram_8, VP);
763 /* if (vde == 0xFFFF)
766 // return 227;//WAS:(vde/*-vdb*/) >> 1;
767 // The video mode height probably works this way:
768 // VC counts from 0 to VP. VDB starts the OP. Either when
769 // VDE is reached or VP, the OP is stopped. Let's try it...
770 // Also note that we're conveniently ignoring interlaced display modes...!
771 // return ((vde > vp ? vp : vde) - vdb) >> 1;
772 // return ((vde > vbb ? vbb : vde) - vdb) >> 1;
773 //Let's try from the Vertical Blank interval...
775 return (vbb - vbe) >> 1; // Again, doesn't take interlacing into account...
784 extern bool hardwareTypeNTSC;
788 //This should be done by JERRY! pcm_reset();
790 memset(tom_ram_8, 0x00, 0x4000);
792 if (hardwareTypeNTSC)
794 SET16(tom_ram_8, MEMCON1, 0x1861);
795 SET16(tom_ram_8, MEMCON2, 0x35CC);
796 SET16(tom_ram_8, HP, 844); // Horizontal Period (1-based; HP=845)
797 SET16(tom_ram_8, HBB, 1713); // Horizontal Blank Begin
798 SET16(tom_ram_8, HBE, 125); // Horizontal Blank End
799 SET16(tom_ram_8, HDE, 1665); // Horizontal Display End
800 SET16(tom_ram_8, HDB1, 203); // Horizontal Display Begin 1
801 SET16(tom_ram_8, VP, 523); // Vertical Period (1-based; in this case VP = 524)
802 SET16(tom_ram_8, VBE, 24); // Vertical Blank End
803 SET16(tom_ram_8, VDB, 38); // Vertical Display Begin
804 SET16(tom_ram_8, VDE, 518); // Vertical Display End
805 SET16(tom_ram_8, VBB, 500); // Vertical Blank Begin
806 SET16(tom_ram_8, VS, 517); // Vertical Sync
807 SET16(tom_ram_8, VMODE, 0x06C1);
811 SET16(tom_ram_8, MEMCON1, 0x1861);
812 SET16(tom_ram_8, MEMCON2, 0x35CC);
813 SET16(tom_ram_8, HP, 850); // Horizontal Period
814 SET16(tom_ram_8, HBB, 1711); // Horizontal Blank Begin
815 SET16(tom_ram_8, HBE, 158); // Horizontal Blank End
816 SET16(tom_ram_8, HDE, 1665); // Horizontal Display End
817 SET16(tom_ram_8, HDB1, 203); // Horizontal Display Begin 1
818 SET16(tom_ram_8, VP, 623); // Vertical Period (1-based; in this case VP = 624)
819 SET16(tom_ram_8, VBE, 34); // Vertical Blank End
820 SET16(tom_ram_8, VDB, 38); // Vertical Display Begin
821 SET16(tom_ram_8, VDE, 518); // Vertical Display End
822 SET16(tom_ram_8, VBB, 600); // Vertical Blank Begin
823 SET16(tom_ram_8, VS, 618); // Vertical Sync
824 SET16(tom_ram_8, VMODE, 0x06C1);
827 tom_width = tom_real_internal_width = 0;
832 // hblankWidthInPixels = GET16(tom_ram_8, HDB1) >> 1;
834 tom_jerry_int_pending = 0;
835 tom_timer_int_pending = 0;
836 tom_object_int_pending = 0;
837 tom_gpu_int_pending = 0;
838 tom_video_int_pending = 0;
840 tom_timer_prescaler = 0;
841 tom_timer_divider = 0;
842 tom_timer_counter = 0;
843 memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));
847 // TOM byte access (read)
849 uint8 TOMReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
851 //???Is this needed???
852 // It seems so. Perhaps it's the +$8000 offset being written to (32-bit interface)?
853 // However, the 32-bit interface is WRITE ONLY, so that can't be it...
854 // Also, the 68K CANNOT make use of the 32-bit interface, since its bus width is only 16-bits...
855 // offset &= 0xFF3FFF;
858 WriteLog("TOM: Reading byte at %06X\n", offset);
861 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
862 return GPUReadByte(offset, who);
863 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
864 return GPUReadByte(offset, who);
865 else if ((offset >= 0xF00010) && (offset < 0xF00028))
866 return OPReadByte(offset, who);
867 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
868 return BlitterReadByte(offset, who);
869 else if (offset == 0xF00050)
870 return tom_timer_prescaler >> 8;
871 else if (offset == 0xF00051)
872 return tom_timer_prescaler & 0xFF;
873 else if (offset == 0xF00052)
874 return tom_timer_divider >> 8;
875 else if (offset == 0xF00053)
876 return tom_timer_divider & 0xFF;
878 return tom_ram_8[offset & 0x3FFF];
882 // TOM word access (read)
884 uint16 TOMReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
886 //???Is this needed???
887 // offset &= 0xFF3FFF;
889 WriteLog("TOM: Reading word at %06X\n", offset);
891 if (offset >= 0xF02000 && offset <= 0xF020FF)
892 WriteLog("TOM: Read attempted from GPU register file by %s (unimplemented)!\n", whoName[who]);
894 if (offset == 0xF000E0)
896 uint16 data = (tom_jerry_int_pending << 4) | (tom_timer_int_pending << 3)
897 | (tom_object_int_pending << 2) | (tom_gpu_int_pending << 1)
898 | (tom_video_int_pending << 0);
899 //WriteLog("tom: interrupt status is 0x%.4x \n",data);
902 //Shoud be handled by the jaguar main loop now... And it is! ;-)
903 /* else if (offset == 0xF00006) // VC
904 // What if we're in interlaced mode?
905 // According to docs, in non-interlace mode VC is ALWAYS even...
906 // return (tom_scanline << 1);// + 1;
907 //But it's causing Rayman to be fucked up... Why???
908 //Because VC is even in NI mode when calling the OP! That's why!
909 return (tom_scanline << 1) + 1;//*/
910 else if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
911 return GPUReadWord(offset, who);
912 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
913 return GPUReadWord(offset, who);
914 else if ((offset >= 0xF00010) && (offset < 0xF00028))
915 return OPReadWord(offset, who);
916 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
917 return BlitterReadWord(offset, who);
918 else if (offset == 0xF00050)
919 return tom_timer_prescaler;
920 else if (offset == 0xF00052)
921 return tom_timer_divider;
924 return (TOMReadByte(offset, who) << 8) | TOMReadByte(offset + 1, who);
928 // TOM byte access (write)
930 void TOMWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
932 //???Is this needed???
933 // Perhaps on the writes--32-bit writes that is! And masked with FF7FFF...
937 WriteLog("TOM: Writing byte %02X at %06X\n", data, offset);
940 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
942 GPUWriteByte(offset, data, who);
945 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
947 GPUWriteByte(offset, data, who);
950 else if ((offset >= 0xF00010) && (offset < 0xF00028))
952 OPWriteByte(offset, data, who);
955 else if ((offset >= 0xF02200) && (offset < 0xF022A0))
957 BlitterWriteByte(offset, data, who);
960 else if (offset == 0xF00050)
962 tom_timer_prescaler = (tom_timer_prescaler & 0x00FF) | (data << 8);
966 else if (offset == 0xF00051)
968 tom_timer_prescaler = (tom_timer_prescaler & 0xFF00) | data;
972 else if (offset == 0xF00052)
974 tom_timer_divider = (tom_timer_divider & 0x00FF) | (data << 8);
978 else if (offset == 0xF00053)
980 tom_timer_divider = (tom_timer_divider & 0xFF00) | data;
984 else if (offset >= 0xF00400 && offset <= 0xF007FF) // CLUT (A & B)
986 // Writing to one CLUT writes to the other
987 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
988 tom_ram_8[offset] = data, tom_ram_8[offset + 0x200] = data;
991 tom_ram_8[offset & 0x3FFF] = data;
995 // TOM word access (write)
997 void TOMWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
999 //???Is this needed???
1003 WriteLog("TOM: Writing word %04X at %06X\n", data, offset);
1005 if (offset == 0xF00000 + MEMCON1)
1006 WriteLog("TOM: Memory Configuration 1 written by %s: %04X\n", whoName[who], data);
1007 if (offset == 0xF00000 + MEMCON2)
1008 WriteLog("TOM: Memory Configuration 2 written by %s: %04X\n", whoName[who], data);
1009 if (offset >= 0xF02000 && offset <= 0xF020FF)
1010 WriteLog("TOM: Write attempted to GPU register file by %s (unimplemented)!\n", whoName[who]);
1012 if ((offset >= GPU_CONTROL_RAM_BASE) && (offset < GPU_CONTROL_RAM_BASE+0x20))
1014 GPUWriteWord(offset, data, who);
1017 else if ((offset >= GPU_WORK_RAM_BASE) && (offset < GPU_WORK_RAM_BASE+0x1000))
1019 GPUWriteWord(offset, data, who);
1022 //What's so special about this?
1023 /* else if ((offset >= 0xF00000) && (offset < 0xF00002))
1025 TOMWriteByte(offset, data >> 8);
1026 TOMWriteByte(offset+1, data & 0xFF);
1028 else if ((offset >= 0xF00010) && (offset < 0xF00028))
1030 OPWriteWord(offset, data, who);
1033 else if (offset == 0xF00050)
1035 tom_timer_prescaler = data;
1039 else if (offset == 0xF00052)
1041 tom_timer_divider = data;
1045 else if (offset == 0xF000E0)
1049 tom_video_int_pending = 0;
1051 tom_gpu_int_pending = 0;
1053 tom_object_int_pending = 0;
1055 tom_timer_int_pending = 0;
1057 tom_jerry_int_pending = 0;
1059 else if ((offset >= 0xF02200) && (offset <= 0xF0229F))
1061 BlitterWriteWord(offset, data, who);
1064 else if (offset >= 0xF00400 && offset <= 0xF007FE) // CLUT (A & B)
1066 // Writing to one CLUT writes to the other
1067 offset &= 0x5FF; // Mask out $F00600 (restrict to $F00400-5FF)
1068 // Watch out for unaligned writes here! (Not fixed yet)
1069 SET16(tom_ram_8, offset, data), SET16(tom_ram_8, offset + 0x200, data);
1073 if (offset == 0x28) // VMODE (Why? Why not OBF?)
1074 objectp_running = 1;
1076 if (offset >= 0x30 && offset <= 0x4E)
1077 data &= 0x07FF; // These are (mostly) 11-bit registers
1078 if (offset == 0x2E || offset == 0x36 || offset == 0x54)
1079 data &= 0x03FF; // These are all 10-bit registers
1081 TOMWriteByte(offset, data >> 8, who);
1082 TOMWriteByte(offset+1, data & 0xFF, who);
1085 WriteLog("TOM: Vertical Display Begin written by %s: %u\n", whoName[who], data);
1087 WriteLog("TOM: Vertical Display End written by %s: %u\n", whoName[who], data);
1089 WriteLog("TOM: Vertical Period written by %s: %u (%sinterlaced)\n", whoName[who], data, (data & 0x01 ? "non-" : ""));
1091 WriteLog("TOM: Horizontal Display Begin 1 written by %s: %u\n", whoName[who], data);
1093 WriteLog("TOM: Horizontal Display End written by %s: %u\n", whoName[who], data);
1095 WriteLog("TOM: Horizontal Period written by %s: %u (+1*2 = %u)\n", whoName[who], data, (data + 1) * 2);
1097 WriteLog("TOM: Vertical Blank Begin written by %s: %u\n", whoName[who], data);
1099 WriteLog("TOM: Vertical Blank End written by %s: %u\n", whoName[who], data);
1101 WriteLog("TOM: Vertical Sync written by %s: %u\n", whoName[who], data);
1103 WriteLog("TOM: Vertical Interrupt written by %s: %u\n", whoName[who], data);
1105 WriteLog("TOM: Horizontal Blank Begin written by %s: %u\n", whoName[who], data);
1107 WriteLog("TOM: Horizontal Blank End written by %s: %u\n", whoName[who], data);
1108 if (offset == VMODE)
1109 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));
1110 /*#define MODE 0x0006 // Line buffer to video generator mode
1111 #define BGEN 0x0080 // Background enable (CRY & RGB16 only)
1112 #define VARMOD 0x0100 // Mixed CRY/RGB16 mode
1113 #define PWIDTH 0x0E00 // Pixel width in video clock cycles (value written + 1)*/
1115 // detect screen resolution changes
1116 //This may go away in the future, if we do the virtualized screen thing...
1117 if ((offset >= 0x28) && (offset <= 0x4F))
1119 uint32 width = tom_getVideoModeWidth(), height = tom_getVideoModeHeight();
1120 tom_real_internal_width = width;
1122 //This looks like an attempt to render non-square pixels (though wrong...)
1123 /* if (width == 640)
1125 memcpy(scanline_render, scanline_render_stretch, sizeof(scanline_render));
1129 memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));//*/
1131 if ((width != tom_width) || (height != tom_height))
1133 extern SDL_Surface * surface, * mainSurface;
1134 extern Uint32 mainSurfaceFlags;
1135 static char window_title[256];
1137 tom_width = width, tom_height = height;
1138 SDL_FreeSurface(surface);
1139 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, tom_width, tom_height,
1140 16, 0x7C00, 0x03E0, 0x001F, 0);
1141 if (surface == NULL)
1143 WriteLog("TOM: Could not create primary SDL surface: %s", SDL_GetError());
1147 sprintf(window_title, "Virtual Jaguar (%i x %i)", (int)tom_width, (int)tom_height);
1148 //???Should we do this??? No!
1149 // SDL_FreeSurface(mainSurface);
1150 mainSurface = SDL_SetVideoMode(tom_width, tom_height, 16, mainSurfaceFlags);
1152 if (mainSurface == NULL)
1154 WriteLog("Joystick: SDL is unable to set the video mode: %s\n", SDL_GetError());
1158 SDL_WM_SetCaption(window_title, window_title);
1163 int tom_irq_enabled(int irq)
1165 // This is the correct byte in big endian... D'oh!
1166 // return jaguar_byte_read(0xF000E1) & (1 << irq);
1167 return tom_ram_8[INT1 + 1/*0xE1*/] & (1 << irq);
1171 /*void tom_set_irq_latch(int irq, int enabled)
1173 tom_ram_8[0xE0] = (tom_ram_8[0xE0] & (~(1<<irq))) | (enabled ? (1<<irq) : 0);
1177 /*uint16 tom_irq_control_reg(void)
1179 return (tom_ram_8[0xE0] << 8) | tom_ram_8[0xE1];
1182 void tom_reset_timer(void)
1184 if (!tom_timer_prescaler || !tom_timer_divider)
1185 tom_timer_counter = 0;
1187 //Probably should *add* this amount to the counter to retain cycle accuracy! !!! FIX !!!
1189 tom_timer_counter = (1 + tom_timer_prescaler) * (1 + tom_timer_divider);
1190 // WriteLog("tom: reseting timer to 0x%.8x (%i)\n",tom_timer_counter,tom_timer_counter);
1194 // TOM Programmable Interrupt Timer handler
1196 void tom_pit_exec(uint32 cycles)
1198 if (tom_timer_counter > 0)
1200 tom_timer_counter -= cycles;
1202 if (tom_timer_counter <= 0)
1204 tom_set_pending_timer_int();
1205 GPUSetIRQLine(GPUIRQ_TIMER, ASSERT_LINE);
1206 if (tom_irq_enabled(IRQ_TIMER) && jaguar_interrupt_handler_is_valid(64))
1207 m68k_set_irq(7); // Cause a 68000 NMI...