// F02298 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx B_Z0 - Z0
// ------------------------------------------------------------
-#include <SDL.h>
+//#include <SDL.h>
#include "tom.h"
+#include "video.h"
#include "gpu.h"
#include "objectp.h"
#include "cry2rgb.h"
#define BG 0x58
#define INT1 0xE0
+// Arbitrary video cutoff values (i.e., first/last visible spots on a TV, in HC ticks)
+/*#define LEFT_VISIBLE_HC 208
+#define RIGHT_VISIBLE_HC 1528//*/
+#define LEFT_VISIBLE_HC 208
+#define RIGHT_VISIBLE_HC 1488
+
//This can be defined in the makefile as well...
//(It's easier to do it here, though...)
//#define TOM_DEBUG
render_xxx_scanline_fn * scanline_render[8];
+// Screen info for various games...
+/*
+Doom
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 123
+TOM: Vertical Display Begin written by M68K: 25
+TOM: Vertical Display End written by M68K: 2047
+TOM: Video Mode written by M68K: 0EC1. PWIDTH = 8, MODE = 16 BPP CRY, flags: BGEN (VC = 5)
+Also does PWIDTH = 4...
+Vertical resolution: 238 lines
+
+Rayman
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 123
+TOM: Vertical Display Begin written by M68K: 25
+TOM: Vertical Display End written by M68K: 2047
+TOM: Vertical Interrupt written by M68K: 507
+TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 92)
+TOM: Horizontal Display Begin 1 written by M68K: 208
+TOM: Horizontal Display End written by M68K: 1670
+Display starts at 31, then 52!
+Vertical resolution: 238 lines
+
+Atari Karts
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 123
+TOM: Vertical Display Begin written by M68K: 25
+TOM: Vertical Display End written by M68K: 2047
+TOM: Video Mode written by GPU: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 4)
+TOM: Video Mode written by GPU: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 508)
+Display starts at 31 (PWIDTH = 4), 24 (PWIDTH = 5)
+
+Iron Soldier
+TOM: Vertical Interrupt written by M68K: 2047
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 0)
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 123
+TOM: Vertical Display Begin written by M68K: 25
+TOM: Vertical Display End written by M68K: 2047
+TOM: Vertical Interrupt written by M68K: 507
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 369)
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 510)
+TOM: Video Mode written by M68K: 06C3. PWIDTH = 4, MODE = 24 BPP RGB, flags: BGEN (VC = 510)
+Display starts at 31
+Vertical resolution: 238 lines
+[Seems to be a problem between the horizontal positioning of the 16-bit CRY & 24-bit RGB]
+
+JagMania
+TOM: Horizontal Period written by M68K: 844 (+1*2 = 1690)
+TOM: Horizontal Blank Begin written by M68K: 1713
+TOM: Horizontal Blank End written by M68K: 125
+TOM: Horizontal Display End written by M68K: 1696
+TOM: Horizontal Display Begin 1 written by M68K: 166
+TOM: Vertical Period written by M68K: 523 (non-interlaced)
+TOM: Vertical Blank End written by M68K: 24
+TOM: Vertical Display Begin written by M68K: 46
+TOM: Vertical Display End written by M68K: 496
+TOM: Vertical Blank Begin written by M68K: 500
+TOM: Vertical Sync written by M68K: 517
+TOM: Vertical Interrupt written by M68K: 497
+TOM: Video Mode written by M68K: 04C1. PWIDTH = 3, MODE = 16 BPP CRY, flags: BGEN (VC = 270)
+Display starts at 55
+
+Double Dragon V
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 123
+TOM: Vertical Display Begin written by M68K: 25
+TOM: Vertical Display End written by M68K: 2047
+TOM: Vertical Interrupt written by M68K: 507
+TOM: Video Mode written by M68K: 06C7. PWIDTH = 4, MODE = 16 BPP RGB, flags: BGEN (VC = 9)
+
+Dino Dudes
+TOM: Horizontal Display End written by M68K: 1823
+TOM: Horizontal Display Begin 1 written by M68K: 45
+TOM: Vertical Display Begin written by M68K: 40
+TOM: Vertical Display End written by M68K: 2047
+TOM: Vertical Interrupt written by M68K: 491
+TOM: Video Mode written by M68K: 06C1. PWIDTH = 4, MODE = 16 BPP CRY, flags: BGEN (VC = 398)
+Display starts at 11 (123 - 45 = 78, 78 / 4 = 19 pixels to skip)
+Width is 417, so maybe width of 379 would be good (starting at 123, ending at 1639)
+Vertical resolution: 238 lines
+
+Flashback
+TOM: Horizontal Display End written by M68K: 1727
+TOM: Horizontal Display Begin 1 written by M68K: 188
+TOM: Vertical Display Begin written by M68K: 1
+TOM: Vertical Display End written by M68K: 2047
+TOM: Vertical Interrupt written by M68K: 483
+TOM: Video Mode written by M68K: 08C7. PWIDTH = 5, MODE = 16 BPP RGB, flags: BGEN (VC = 99)
+Width would be 303 with above scheme, but border width would be 13 pixels
+
+Trevor McFur
+Vertical resolution: 238 lines
+*/
+
+
void tom_calc_cry_rgb_mix_lut(void)
{
memory_malloc_secure((void **)&tom_cry_rgb_mix_lut, 2 * 0x10000, "CRY/RGB mixed mode LUT");
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
+ //New stuff--restrict our drawing...
+ uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
+ //NOTE: May have to check HDB2 as well!
+ int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ startPos /= pwidth;
+ if (startPos < 0)
+ current_line_buffer += 2 * -startPos;
+ else
+ backbuffer += 2 * startPos, width -= startPos;
+
while (width)
{
uint16 color = (*current_line_buffer++) << 8;
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
+ //New stuff--restrict our drawing...
+ uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
+ //NOTE: May have to check HDB2 as well!
+ int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ startPos /= pwidth;
+ if (startPos < 0)
+ current_line_buffer += 2 * -startPos;
+ else
+ backbuffer += 2 * startPos, width -= startPos;
+
while (width)
{
uint16 color = (*current_line_buffer++) << 8;
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
+ //New stuff--restrict our drawing...
+ uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
+ //NOTE: May have to check HDB2 as well!
+ int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ startPos /= pwidth;
+ if (startPos < 0)
+ current_line_buffer += 4 * -startPos;
+ else
+ backbuffer += 2 * startPos, width -= startPos;
+
while (width)
{
+ // This is NOT a good 8 -> 5 bit RGB conversion! (It saturates values below 8
+ // to zero and throws away almost *half* the color resolution!)
uint16 green = (*current_line_buffer++) >> 3;
uint16 red = (*current_line_buffer++) >> 3;
current_line_buffer++;
uint16 width = tom_width;
uint8 * current_line_buffer = (uint8 *)&tom_ram_8[0x1800];
+ //New stuff--restrict our drawing...
+ uint8 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
+ //NOTE: May have to check HDB2 as well!
+ int16 startPos = GET16(tom_ram_8, HDB1) - LEFT_VISIBLE_HC; // Get start position in HC ticks
+ startPos /= pwidth;
+ if (startPos < 0)
+ current_line_buffer += 2 * -startPos;
+ else
+ backbuffer += 2 * startPos, width -= startPos;
+
while (width)
{
uint16 color = (*current_line_buffer++) << 8;
}
}
-uint32 TOMGetSDLScreenPitch(void)
-{
- extern SDL_Surface * surface;
-
- return surface->pitch;
-}
-
//
// TOM initialization
//
// return width[(GET16(tom_ram_8, VMODE) & PWIDTH) >> 9];
// Now, we just calculate it...
- uint16 hdb1 = GET16(tom_ram_8, HDB1), hde = GET16(tom_ram_8, HDE),
+/* uint16 hdb1 = GET16(tom_ram_8, HDB1), hde = GET16(tom_ram_8, HDE),
hbb = GET16(tom_ram_8, HBB), pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
// return ((hbb < hde ? hbb : hde) - hdb1) / pwidth;
//Temporary, for testing Doom...
- return ((hbb < hde ? hbb : hde) - hdb1) / (pwidth = 8 ? 4 : pwidth);
+ return ((hbb < hde ? hbb : hde) - hdb1) / (pwidth == 8 ? 4 : pwidth);*/
+
+ // To make it easier to make a quasi-fixed display size, we restrict the viewing
+ // area to an arbitrary range of the Horizontal Count.
+ uint16 pwidth = ((GET16(tom_ram_8, VMODE) & PWIDTH) >> 9) + 1;
+// return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / pwidth;
+//Temporary, for testing Doom...
+ return (RIGHT_VISIBLE_HC - LEFT_VISIBLE_HC) / (pwidth == 8 ? 4 : pwidth);
// More speculating...
// According to the JTRM, the number of potential pixels across is given by the
// which to measure HBB & HDB1/2 against when rendering LBUF (i.e., if HDB1 is 20 ticks
// to the right of the ALDL and PWIDTH is 4, then start writing the LBUF starting at
// backbuffer + 5 pixels).
+
+// That's basically what we're doing now...!
}
// *** SPECULATION ***
// It might work better to virtualize the height settings, i.e., set the vertical
// height at 240 lines and clip using the VDB and VDE/VP registers...
-// Same with the width...
+// Same with the width... [Width is pretty much virtualized now.]
uint32 tom_getVideoModeHeight(void)
{
WriteLog("TOM: Horizontal Blank End written by %s: %u\n", whoName[who], data);
if (offset == VMODE)
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));
-/*#define MODE 0x0006 // Line buffer to video generator mode
-#define BGEN 0x0080 // Background enable (CRY & RGB16 only)
-#define VARMOD 0x0100 // Mixed CRY/RGB16 mode
-#define PWIDTH 0x0E00 // Pixel width in video clock cycles (value written + 1)*/
// detect screen resolution changes
//This may go away in the future, if we do the virtualized screen thing...
+//This may go away soon!
if ((offset >= 0x28) && (offset <= 0x4F))
{
uint32 width = tom_getVideoModeWidth(), height = tom_getVideoModeHeight();
tom_real_internal_width = width;
-//This looks like an attempt to render non-square pixels (though wrong...)
-/* if (width == 640)
- {
- memcpy(scanline_render, scanline_render_stretch, sizeof(scanline_render));
- width = 320;
- }
- else
- memcpy(scanline_render, scanline_render_normal, sizeof(scanline_render));//*/
-
if ((width != tom_width) || (height != tom_height))
{
- extern SDL_Surface * surface, * mainSurface;
- extern Uint32 mainSurfaceFlags;
- static char window_title[256];
+// extern SDL_Surface * surface, * mainSurface;
+// extern Uint32 mainSurfaceFlags;
+// static char window_title[256];
tom_width = width, tom_height = height;
- SDL_FreeSurface(surface);
+ ResizeScreen(tom_width, tom_height);
+/* SDL_FreeSurface(surface);
surface = SDL_CreateRGBSurface(SDL_SWSURFACE, tom_width, tom_height,
16, 0x7C00, 0x03E0, 0x001F, 0);
if (surface == NULL)
}
sprintf(window_title, "Virtual Jaguar (%i x %i)", (int)tom_width, (int)tom_height);
-//???Should we do this??? No!
-// SDL_FreeSurface(mainSurface);
mainSurface = SDL_SetVideoMode(tom_width, tom_height, 16, mainSurfaceFlags);
if (mainSurface == NULL)
exit(1);
}
- SDL_WM_SetCaption(window_title, window_title);
+ SDL_WM_SetCaption(window_title, window_title);//*/
}
}
}
projects / virtualjaguar / blobdiff