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https://github.com/RaySollium99/picodrive.git
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sms, add missing TMS VDP modes
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kub
parent
da64996b0d
commit
22917adcff
1 changed files with 150 additions and 24 deletions
174
pico/mode4.c
174
pico/mode4.c
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@ -3,15 +3,12 @@
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* (C) notaz, 2009-2010
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* (C) kub, 2021
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*
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* currently supports VDP mode 4 (SMS and GG) and mode 2+0 (TMS)
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* currently supports VDP mode 4 (SMS and GG) and mode 3-0 (TMS)
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* modes numbered after the bit numbers used in Sega and TI documentation
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*
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* This work is licensed under the terms of MAME license.
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* See COPYING file in the top-level directory.
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*/
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/*
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* TODO:
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* - other TMS9918 modes?
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*/
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#include "pico_int.h"
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#include <platform/common/upscale.h>
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@ -55,8 +52,8 @@ static int CollisionDetect(u8 *mb, u16 sx, unsigned int pack, int zoomed)
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return col;
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}
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/* Mode 4 */
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/*========*/
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/* Mode 4 - SMS Graphics */
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/*=======================*/
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static void TileBGM4(u16 sx, int pal)
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{
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@ -333,14 +330,44 @@ static void DrawDisplayM4(int scanline)
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/* TMS Modes */
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/*===========*/
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/* Background, Graphics modes */
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/* Background */
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#define TMS_PIXELBG(x,p) \
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t = (pack>>(7-p)) & 0x01; \
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t = (pal >> (t << 2)) & 0x0f; \
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pd[x] = t;
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if (t) \
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pd[x] = t;
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static void TileNormBgGr(u16 sx, unsigned int pack, int pal)
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static void TileNormBgM1(u16 sx, unsigned int pack, int pal) /* Text */
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{
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u8 *pd = Pico.est.HighCol + sx;
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unsigned int t;
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TMS_PIXELBG(0, 0)
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TMS_PIXELBG(1, 1)
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TMS_PIXELBG(2, 2)
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TMS_PIXELBG(3, 3)
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TMS_PIXELBG(4, 4)
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TMS_PIXELBG(5, 5)
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}
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static void TileNormBgM2(u16 sx, int pal) /* Multicolor */
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{
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u8 *pd = Pico.est.HighCol + sx;
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unsigned int pack = 0xf0;
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unsigned int t;
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TMS_PIXELBG(0, 0)
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TMS_PIXELBG(1, 1)
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TMS_PIXELBG(2, 2)
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TMS_PIXELBG(3, 3)
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TMS_PIXELBG(4, 4)
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TMS_PIXELBG(5, 5)
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TMS_PIXELBG(6, 6)
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TMS_PIXELBG(7, 7)
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}
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static void TileNormBgMg(u16 sx, unsigned int pack, int pal) /* Graphics */
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{
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u8 *pd = Pico.est.HighCol + sx;
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unsigned int t;
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@ -494,11 +521,105 @@ static void DrawSpritesTMS(void)
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}
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}
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/* Mode 2 */
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/*========*/
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/* Mode 1 - Text */
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/*===============*/
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/* Draw the background into a scanline; cells, dx, tilex, ty merged to reduce registers */
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static void DrawStripM2(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty)
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static void DrawStripM1(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty)
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{
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// Draw tiles across screen:
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for (; cells_dx > 0; cells_dx += 6, tilex_ty++, cells_dx -= 0x10000)
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{
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unsigned int pack, pal;
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unsigned code;
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code = nametab[tilex_ty & 0x3f];
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pal = Pico.video.reg[7];
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pack = pattab[code << 3];
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TileNormBgM1(cells_dx, pack, pal);
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}
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}
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/* Draw a scanline */
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static void DrawDisplayM1(int scanline)
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{
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struct PicoVideo *pv = &Pico.video;
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u8 *nametab, *pattab;
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int tilex, dx, cells;
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int cellskip = 0; // XXX
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int maxcells = 40;
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// name, color, pattern table:
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nametab = PicoMem.vramb + ((pv->reg[2]<<10) & 0x3c00);
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pattab = PicoMem.vramb + ((pv->reg[4]<<11) & 0x3800);
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nametab += ((scanline>>3) * maxcells);
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pattab += (scanline & 0x7);
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tilex = cellskip & 0x1f;
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cells = maxcells - cellskip;
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dx = (cellskip << 3) + line_offset + 8;
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// tiles
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if (!(pv->debug_p & PVD_KILL_B))
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DrawStripM1(nametab, pattab, dx | (cells << 16), tilex | (scanline << 16));
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}
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/* Mode 2 - Multicolor */
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/*=====================*/
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/* Draw the background into a scanline; cells, dx, tilex, ty merged to reduce registers */
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static void DrawStripM2(const u8 *nametab, const u8 *pattab, int cells_dx, int tilex_ty)
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{
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// Draw tiles across screen:
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for (; cells_dx > 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000)
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{
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unsigned int pal;
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unsigned code;
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code = nametab[tilex_ty & 0x1f];
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pal = pattab[code << 3];
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TileNormBgM2(cells_dx, pal);
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}
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}
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/* Draw a scanline */
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static void DrawDisplayM2(int scanline)
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{
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struct PicoVideo *pv = &Pico.video;
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u8 *nametab, *pattab;
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int tilex, dx, cells;
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int cellskip = 0; // XXX
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int maxcells = 32;
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// name, color, pattern table:
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nametab = PicoMem.vramb + ((pv->reg[2]<<10) & 0x3c00);
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pattab = PicoMem.vramb + ((pv->reg[4]<<11) & 0x3800);
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nametab += (scanline>>5) << 5;
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pattab += (scanline>>2) & 0x7;
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tilex = cellskip & 0x1f;
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cells = maxcells - cellskip;
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dx = (cellskip << 3) + line_offset + 8;
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// tiles
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if (!(pv->debug_p & PVD_KILL_B))
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DrawStripM2(nametab, pattab, dx | (cells << 16), tilex | (scanline << 16));
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// sprites
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if (!(pv->debug_p & PVD_KILL_S_LO))
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DrawSpritesTMS();
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}
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/* Mode 3 - Graphics II */
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/*======================*/
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/* Draw the background into a scanline; cells, dx, tilex, ty merged to reduce registers */
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static void DrawStripM3(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty)
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{
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// Draw tiles across screen:
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for (; cells_dx > 0; cells_dx += 8, tilex_ty++, cells_dx -= 0x10000)
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@ -509,12 +630,12 @@ static void DrawStripM2(const u8 *nametab, const u8 *coltab, const u8 *pattab, i
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code = nametab[tilex_ty & 0x1f] << 3;
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pal = coltab[code];
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pack = pattab[code];
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TileNormBgGr(cells_dx, pack, pal);
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TileNormBgMg(cells_dx, pack, pal);
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}
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}
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/* Draw a scanline */
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static void DrawDisplayM2(int scanline)
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static void DrawDisplayM3(int scanline)
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{
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struct PicoVideo *pv = &Pico.video;
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u8 *nametab, *coltab, *pattab;
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@ -537,15 +658,16 @@ static void DrawDisplayM2(int scanline)
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// tiles
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if (!(pv->debug_p & PVD_KILL_B))
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DrawStripM2(nametab, coltab, pattab, dx | (cells << 16), tilex | (scanline << 16));
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DrawStripM3(nametab, coltab, pattab, dx | (cells << 16), tilex | (scanline << 16));
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// sprites
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if (!(pv->debug_p & PVD_KILL_S_LO))
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DrawSpritesTMS();
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}
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/* Mode 0 */
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/*========*/
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/* Mode 0 - Graphics I */
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/*=====================*/
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/* Draw the background into a scanline; cells, dx, tilex, ty merged to reduce registers */
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static void DrawStripM0(const u8 *nametab, const u8 *coltab, const u8 *pattab, int cells_dx, int tilex_ty)
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@ -559,7 +681,7 @@ static void DrawStripM0(const u8 *nametab, const u8 *coltab, const u8 *pattab, i
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code = nametab[tilex_ty & 0x1f];
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pal = coltab[code >> 3];
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pack = pattab[code << 3];
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TileNormBgGr(cells_dx, pack, pal);
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TileNormBgMg(cells_dx, pack, pal);
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}
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}
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@ -690,7 +812,9 @@ void PicoLineSMS(int line)
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BackFill(bgcolor, 0, &Pico.est); // bgcolor is from 2nd palette in mode 4
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if (Pico.video.reg[1] & 0x40) {
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if (Pico.video.reg[0] & 0x04) DrawDisplayM4(line);
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else if (Pico.video.reg[0] & 0x02) DrawDisplayM2(line);
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else if (Pico.video.reg[0] & 0x02) DrawDisplayM3(line);
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else if (Pico.video.reg[1] & 0x08) DrawDisplayM2(line);
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else if (Pico.video.reg[1] & 0x10) DrawDisplayM1(line);
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else DrawDisplayM0(line);
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}
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@ -705,12 +829,14 @@ norender:
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Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
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}
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/* Fixed palette for TMS9918 modes */
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/* Palette for TMS9918 mode, see https://www.smspower.org/Development/Palette */
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// RGB values: #000000 #000000 #21c842 #5edc78 #5455ed #7d76fc #d4524d #42ebf5
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// #fc5554 #ff7978 #d4c154 #e6ce80 #21b03b #c95b5a #cccccc #ffffff
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static u16 tmspal[32] = {
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// SMS palette
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0x0000, 0x0000, 0x00a0, 0x00f0, 0x0500, 0x0f00, 0x0005, 0x0ff0,
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0x000a, 0x000f, 0x0055, 0x00ff, 0x0050, 0x0f0f, 0x0555, 0x0fff,
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// TMS palette
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// 0x0000, 0x0000, 0x00a0, 0x00f0, 0x0a00, 0x0f00, 0x0005, 0x0ff0,
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// 0x000a, 0x000f, 0x0055, 0x00ff, 0x0050, 0x0f0f, 0x0555, 0x0fff,
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// GG palette
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0x0000, 0x0000, 0x04c2, 0x07d5, 0x0e55, 0x0f77, 0x045d, 0x0fe4,
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0x055f, 0x077f, 0x05cd, 0x08ce, 0x03b2, 0x0b5c, 0x0ccc, 0x0fff,
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};
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