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https://github.com/RaySollium99/picodrive.git
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gfx chip faker, hint vector
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@20 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
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ab0607f7e4
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d1df87866b
5 changed files with 217 additions and 10 deletions
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@ -161,6 +161,7 @@ struct PicoSRAM
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// MCD
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#include "cd/cd_sys.h"
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#include "cd/LC89510.h"
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#include "cd/gfx_cd.h"
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struct mcd_misc
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{
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@ -183,6 +184,7 @@ typedef struct
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CDD cdd;
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CDC cdc;
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_scd scd;
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Rot_Comp rot_comp;
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struct mcd_misc m;
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} mcd_state;
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@ -24,8 +24,8 @@ typedef unsigned int u32;
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//#define __debug_io
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//#define __debug_io2
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#define rdprintf dprintf
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//#define rdprintf(...)
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//#define rdprintf dprintf
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#define rdprintf(...)
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// -----------------------------------------------------------------
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@ -61,7 +61,7 @@ static u32 m68k_reg_read16(u32 a)
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dprintf("m68k reserved read");
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goto end;
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case 0xC:
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dprintf("m68k stopwatch read");
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dprintf("m68k stopwatch timer read");
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break;
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}
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@ -118,9 +118,11 @@ static void m68k_reg_write8(u32 a, u32 d)
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return;
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case 6:
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*((char *)&Pico_mcd->m.hint_vector+1) = d;
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Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
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return;
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case 7:
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*(char *)&Pico_mcd->m.hint_vector = d;
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Pico_mcd->bios[0x72] = d;
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return;
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case 0xe:
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//dprintf("m68k: comm flag: %02x", d);
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@ -162,7 +164,10 @@ static u32 s68k_reg_read16(u32 a)
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d = Read_CDC_Host(1); // Gens returns 0 here on byte reads
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goto end;
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case 0xC:
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dprintf("s68k stopwatch read");
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dprintf("s68k stopwatch timer read");
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break;
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case 0x30:
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dprintf("s68k int3 timer read");
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break;
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case 0x34: // fader
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d = 0; // no busy bit
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@ -210,6 +215,12 @@ static void s68k_reg_write8(u32 a, u32 d)
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case 0xa:
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dprintf("s68k set CDC dma addr");
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break;
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case 0xc:
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dprintf("s68k set stopwatch timer");
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break;
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case 0x31:
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dprintf("s68k set int3 timer");
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break;
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case 0x33: // IRQ mask
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dprintf("s68k irq mask: %02x", d);
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if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {
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@ -32,6 +32,7 @@ int PicoResetMCD(int hard)
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{
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// clear everything except BIOS
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memset(Pico_mcd->prg_ram, 0, sizeof(mcd_state) - sizeof(Pico_mcd->bios));
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*(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6)
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PicoMCD |= 2; // s68k reset pending
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Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset
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counter75hz = 0;
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@ -209,6 +210,9 @@ static int PicoFrameHintsMCD(void)
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counter75hz -= counter75hz_lim;
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Check_CD_Command();
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}
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if (Pico_mcd->rot_comp.Reg_58 & 0x8000)
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gfx_cd_update();
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}
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// draw a frame just after vblank in alternative render mode
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169
Pico/cd/gfx_cd.c
169
Pico/cd/gfx_cd.c
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@ -2,10 +2,83 @@
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#include "../PicoInt.h"
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#define rot_comp Pico_mcd->rot_comp
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static int Table_Rot_Time[] =
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{
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0x00054000, 0x00048000, 0x00040000, 0x00036000, //; 008-032 ; briefing - sprite
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0x0002E000, 0x00028000, 0x00024000, 0x00022000, //; 036-064 ; arbre souvent
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0x00021000, 0x00020000, 0x0001E000, 0x0001B800, //; 068-096 ; map thunderstrike
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0x00019800, 0x00017A00, 0x00015C00, 0x00013E00, //; 100-128 ; logo défoncé
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0x00012000, 0x00011800, 0x00011000, 0x00010800, //; 132-160 ; briefing - map
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0x00010000, 0x0000F800, 0x0000F000, 0x0000E800, //; 164-192
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0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800, //; 196-224
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0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800, //; 228-256 ; batman visage
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0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00, //; 260-288
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0x00009C00, 0x00009B00, 0x00009A00, 0x00009900, //; 292-320
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0x00009800, 0x00009700, 0x00009600, 0x00009500, //; 324-352
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0x00009400, 0x00009300, 0x00009200, 0x00009100, //; 356-384
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0x00009000, 0x00008F00, 0x00008E00, 0x00008D00, //; 388-416
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0x00008C00, 0x00008B00, 0x00008A00, 0x00008900, //; 420-448
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0x00008800, 0x00008700, 0x00008600, 0x00008500, //; 452-476
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0x00008400, 0x00008300, 0x00008200, 0x00008100, //; 480-512
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};
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#if 1*0
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typedef struct
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{
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unsigned int Reg_58; // Stamp_Size
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unsigned int Reg_5A;
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unsigned int Reg_5C;
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unsigned int Reg_5E;
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unsigned int Reg_60;
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unsigned int Reg_62;
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unsigned int Reg_64; // V_Dot
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unsigned int Reg_66;
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unsigned int Stamp_Map_Adr;
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unsigned int Buffer_Adr;
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unsigned int Vector_Adr;
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unsigned int Jmp_Adr;
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unsigned int Float_Part;
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unsigned int Draw_Speed;
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unsigned int XS;
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unsigned int YS;
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unsigned int DXS;
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unsigned int DYS;
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unsigned int XD;
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unsigned int YD;
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unsigned int XD_Mul;
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unsigned int H_Dot;
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} Rot_Comp;
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#endif
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static void gfx_cd_start(void)
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{
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dprintf("gfx_cd_start()");
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int upd_len;
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dprintf("gfx_cd_start()");
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upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
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upd_len = Table_Rot_Time[upd_len];
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rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
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rot_comp.Reg_58 |= 0x8000; // Stamp_Size, we start a new GFX operation
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gfx_cd_update();
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}
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static void gfx_completed(void)
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{
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rot_comp.Reg_58 &= 0x7fff; // Stamp_Size
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rot_comp.Reg_64 = 0;
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if (Pico_mcd->s68k_regs[0x33] & (1<<1))
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{
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dprintf("gfx_cd irq 1");
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@ -13,18 +86,70 @@ static void gfx_cd_start(void)
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}
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}
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//static void gfx_do(void)
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//{
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//}
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void gfx_cd_update(void)
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{
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unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
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int jobs;
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dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
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if (!*V_Dot)
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{
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// ...
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gfx_completed();
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return;
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}
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jobs = rot_comp.Float_Part >> 16;
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if (!jobs)
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{
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rot_comp.Float_Part += rot_comp.Draw_Speed;
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return;
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}
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rot_comp.Float_Part &= 0xffff;
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rot_comp.Float_Part += rot_comp.Draw_Speed;
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while (jobs--)
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{
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// jmp [Jmp_Adr]:
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(*V_Dot)--; // dec byte [V_Dot]
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if (!*V_Dot)
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{
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// GFX_Completed:
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gfx_completed();
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return;
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}
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}
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}
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unsigned int gfx_cd_read(unsigned int a)
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{
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dprintf("gfx_cd_read(%x)", a);
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unsigned int d = 0;
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switch (a) {
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case 0x58: d = rot_comp.Reg_58; break;
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case 0x5A: d = rot_comp.Reg_5A; break;
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case 0x5C: d = rot_comp.Reg_5C; break;
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case 0x5E: d = rot_comp.Reg_5E; break;
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case 0x60: d = rot_comp.Reg_60; break;
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case 0x62: d = rot_comp.Reg_62; break;
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case 0x64: d = rot_comp.Reg_64; break;
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case 0x66: break;
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default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
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}
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dprintf("gfx_cd_read(%02x) = %04x", a, d);
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// switch (a) {
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// case 2:
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// return;
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return 0;
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}
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@ -33,10 +158,42 @@ void gfx_cd_write(unsigned int a, unsigned int d)
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dprintf("gfx_cd_write(%x, %04x)", a, d);
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switch (a) {
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case 0x66:
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case 0x58: // .Reg_Stamp_Size
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rot_comp.Reg_58 = d & 7;
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return;
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case 0x5A: // .Reg_Stamp_Adr
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rot_comp.Reg_5A = d & 0xffe0;
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return;
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case 0x5C: // .Reg_IM_VCell_Size
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rot_comp.Reg_5C = d & 0x1f;
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return;
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case 0x5E: // .Reg_IM_Adr
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rot_comp.Reg_5E = d & 0xFFF8;
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return;
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case 0x60: // .Reg_IM_Offset
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rot_comp.Reg_60 = d & 0x3f;
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return;
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case 0x62: // .Reg_IM_HDot_Size
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rot_comp.Reg_62 = d & 0x1ff;
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return;
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case 0x64: // .Reg_IM_VDot_Size
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rot_comp.Reg_64 = d & 0xff; // V_Dot, must be 32bit?
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return;
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case 0x66: // .Reg_Vector_Adr
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rot_comp.Reg_66 = d & 0xfffe;
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if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
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gfx_cd_start();
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return;
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default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
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}
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}
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@ -1,3 +1,34 @@
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#ifndef _GFX_CD_H
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#define _GFX_CD_H
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typedef struct
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{
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unsigned int Reg_58; // Stamp_Size
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unsigned int Reg_5A;
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unsigned int Reg_5C;
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unsigned int Reg_5E;
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unsigned int Reg_60;
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unsigned int Reg_62;
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unsigned int Reg_64; // V_Dot
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unsigned int Reg_66;
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unsigned int Stamp_Map_Adr;
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unsigned int Buffer_Adr;
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unsigned int Vector_Adr;
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unsigned int Jmp_Adr;
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unsigned int Float_Part;
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unsigned int Draw_Speed;
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unsigned int XS;
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unsigned int YS;
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unsigned int DXS;
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unsigned int DYS;
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unsigned int XD;
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unsigned int YD;
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unsigned int XD_Mul;
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unsigned int H_Dot;
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} Rot_Comp;
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void gfx_cd_update(void);
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@ -5,3 +36,5 @@ void gfx_cd_update(void);
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unsigned int gfx_cd_read(unsigned int a);
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void gfx_cd_write(unsigned int a, unsigned int d);
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#endif // _GFX_CD_H
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