From e5503e2f4fe1c7ccc46c493a1596fb0e416f678e Mon Sep 17 00:00:00 2001 From: notaz Date: Sat, 1 Sep 2007 21:34:13 +0000 Subject: [PATCH] memhandlers slightly improved git-svn-id: file:///home/notaz/opt/svn/PicoDrive@234 be3aeb3a-fb24-0410-a615-afba39da0efa --- Pico/Memory.c | 37 ++++++- Pico/Memory.s | 206 +++++++++++++++++++++++++++++++++++++- Pico/MemoryCmn.c | 217 ++++++++++++++++++---------------------- Pico/PicoInt.h | 17 ++-- Pico/cd/Memory.s | 11 +- cpu/DrZ80/drz80.s | 29 +++--- platform/linux/Makefile | 3 + 7 files changed, 365 insertions(+), 155 deletions(-) diff --git a/Pico/Memory.c b/Pico/Memory.c index ec31ea2..828360c 100644 --- a/Pico/Memory.c +++ b/Pico/Memory.c @@ -26,6 +26,7 @@ extern unsigned int lastSSRamWrite; // used by serial SRAM code #ifdef _ASM_MEMORY_C u32 PicoRead8(u32 a); u32 PicoRead16(u32 a); +void PicoWrite8(u32 a,u8 d); void PicoWriteRomHW_SSF2(u32 a,u32 d); void PicoWriteRomHW_in1 (u32 a,u32 d); #endif @@ -110,6 +111,38 @@ PICO_INTERNAL_ASM void PicoMemReset(void) // ----------------------------------------------------------------- +int PadRead(int i) +{ + int pad,value,data_reg; + pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU + data_reg=Pico.ioports[i+1]; + + // orr the bits, which are set as output + value = data_reg&(Pico.ioports[i+4]|0x80); + + if(PicoOpt & 0x20) { // 6 button gamepad enabled + int phase = Pico.m.padTHPhase[i]; + + if(phase == 2 && !(data_reg&0x40)) { // TH + value|=(pad&0xc0)>>2; // ?0SA 0000 + return value; + } else if(phase == 3) { + if(data_reg&0x40) + value|=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ + else + value|=((pad&0xc0)>>2)|0x0f; // ?0SA 1111 + return value; + } + } + + if(data_reg&0x40) // TH + value|=(pad&0x3f); // ?1CB RLDU + else value|=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU + + return value; // will mirror later +} + + #ifndef _ASM_MEMORY_C // address must already be checked static int SRAMRead(u32 a) @@ -399,7 +432,8 @@ PICO_INTERNAL_ASM u32 CPU_CALL PicoRead32(u32 a) // ----------------------------------------------------------------- // Write Ram -static void CPU_CALL PicoWrite8(u32 a,u8 d) +#ifndef _ASM_MEMORY_C +PICO_INTERNAL_ASM void CPU_CALL PicoWrite8(u32 a,u8 d) { #ifdef __debug_io dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); @@ -416,6 +450,7 @@ static void CPU_CALL PicoWrite8(u32 a,u8 d) a&=0xffffff; OtherWrite8(a,d,8); } +#endif void CPU_CALL PicoWrite16(u32 a,u16 d) { diff --git a/Pico/Memory.s b/Pico/Memory.s index fecdb0d..a3f2bdc 100644 --- a/Pico/Memory.s +++ b/Pico/Memory.s @@ -7,6 +7,7 @@ @ All Rights Reserved +.include "port_config.s" .text @@ -140,7 +141,10 @@ m_read32_table: .global PicoRead8 .global PicoRead16 .global PicoRead32 +.global PicoWrite8 .global PicoWriteRomHW_SSF2 +.global m_m68k_read8_misc +.global m_m68k_write8_misc PicoMemReset: @@ -359,12 +363,70 @@ m_read8_rom12: @ 0x900000 - 0x97ffff m_read8_rom13: @ 0x980000 - 0x9fffff m_read8_rom 0x13 + +m_m68k_read8_misc: m_read8_misc: - bic r2, r0, #0x00ff - bic r2, r2, #0xbf00 - cmp r2, #0xa00000 @ Z80 RAM? - ldreq r2, =z80Read8 + bic r2, r0, #0x001f @ most commonly we get i/o port read, + cmp r2, #0xa10000 @ so check for it first + bne m_read8_misc2 +m_read8_misc_io: + ands r0, r0, #0x1e + beq m_read8_misc_hwreg + cmp r0, #4 + ldrle r2, =PadRead + movlt r0, #0 + moveq r0, #1 + bxle r2 + ldr r3, =(Pico+0x22000) + mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a]) + ldrb r0, [r3, r0] + bx lr + +m_read8_misc_hwreg: + ldr r3, =(Pico+0x22200) + ldrb r0, [r3, #0x0f] @ Pico.m.hardware + bx lr + +m_read8_misc2: + mov r2, #0xa10000 @ games also like to poll busreq, + orr r2, r2, #0x001100 @ so we'll try it now + cmp r0, r2 + ldreq r2, =z80ReadBusReq + bxeq r2 + + and r2, r0, #0xff0000 @ finally it might be + cmp r2, #0xa00000 @ z80 area + bne m_read8_misc3 + tst r0, #0x4000 + ldreq r2, =z80Read8 @ z80 RAM bxeq r2 + and r2, r0, #0x6000 + cmp r2, #0x4000 + mvnne r0, #0 + bxne lr @ invalid +.if EXTERNAL_YM2612 + ldr r1, =PicoOpt + ldr r1, [r1] + tst r1, #1 + beq m_read8_fake_ym2612 + tst r1, #0x200 + ldreq r2, =YM2612Read_ + ldrne r2, =YM2612Read_940 +.else + ldr r2, =YM2612Read_ +.endif + bx r2 @ ym2612 + +m_read8_fake_ym2612: + ldr r3, =(Pico+0x22200) + ldrb r0, [r3, #8] @ Pico.m.rotate + add r1, r0, #1 + strb r1, [r3, #8] + and r0, r0, #3 + bx lr + +m_read8_misc3: + @ if everything else fails, use generic handler stmfd sp!,{r0,lr} bic r0, r0, #1 mov r1, #8 @@ -374,6 +436,7 @@ m_read8_misc: moveq r0, r0, lsr #8 bx lr + m_read8_vdp: tst r0, #0x70000 tsteq r0, #0x000e0 @@ -738,3 +801,138 @@ pwr_banking: bx lr +@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +@ Here we only handle most often used locations, +@ everything else is passed to generic handlers + +PicoWrite8: @ u32 a, u8 d + bic r0, r0, #0xff000000 + and r2, r0, #0x00e00000 + cmp r2, #0x00e00000 @ RAM? + ldr r3, =Pico + biceq r0, r0, #0x00ff0000 + eoreq r0, r0, #1 + streqb r1, [r3, r0] + bxeq lr + +m_m68k_write8_misc: + bic r2, r0, #0x1f @ most commonly we get i/o port write, + cmp r2, #0xa10000 @ so check for it first + bne m_write8_misc2 +m_write8_io: + ldr r2, =PicoOpt + and r0, r0, #0x1e + ldr r2, [r2] + ldr r3, =(Pico+0x22000) @ Pico.ioports + tst r2, #0x20 @ 6 button pad? + streqb r1, [r3, r0, lsr #1] + bxeq lr + cmp r0, #2 + cmpne r0, #4 + bne m_write8_io_done @ not likely to happen + add r2, r3, #0x200 @ Pico+0x22200 + mov r12,#0 + cmp r0, #2 + streqb r12,[r2,#0x18] + strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0 + tst r1, #0x40 @ TH + beq m_write8_io_done + ldrb r12,[r3, r0, lsr #1] + tst r12,#0x40 + bne m_write8_io_done + cmp r0, #2 + ldreqb r12,[r2,#0x0a] + ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase + add r12,r12,#1 + streqb r12,[r2,#0x0a] + strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase +m_write8_io_done: + strb r1, [r3, r0, lsr #1] + bx lr + + +m_write8_misc2: + and r2, r0, #0xff0000 + cmp r2, #0xa00000 @ z80 area? + bne m_write8_not_z80 + tst r0, #0x4000 + bne m_write8_z80_not_ram + ldr r3, =(Pico+0x20000) @ Pico.zram + add r2, r3, #0x02200 @ Pico+0x22200 + ldrb r2, [r2, #9] @ Pico.m.z80Run + bic r0, r0, #0xff0000 + bic r0, r0, #0x00e000 + tst r2, #1 + streqb r1, [r3, r0] @ zram + bx lr + +m_write8_z80_not_ram: + and r2, r0, #0x6000 + cmp r2, #0x4000 + bne m_write8_z80_not_ym2612 + ldr r2, =PicoOpt + and r0, r0, #3 + ldr r2, [r2] + tst r2, #1 + bxeq lr + stmfd sp!,{lr} +.if EXTERNAL_YM2612 + tst r2, #0x200 + ldreq r2, =YM2612Write_ + ldrne r2, =YM2612Write_940 + mov lr, pc + bx r2 +.else + bl YM2612Write_ +.endif + ldr r2, =emustatus + ldmfd sp!,{lr} + ldr r1, [r2] + orr r1, r0, r2 + str r1, [r2] @ emustatus|=YM2612Write(a&3, d); + bx lr + +m_write8_z80_not_ym2612: @ not too likely + mov r2, r0, lsl #17 + bic r2, r2, #6<<17 + mov r3, #0x7f00 + orr r3, r3, #0x0011 + cmp r3, r2, lsr #17 @ psg @ z80 area? + beq m_write8_psg + and r2, r0, #0x7f00 + cmp r2, #0x6000 @ bank register? + bxne lr @ invalid write + +m_write8_z80_bank_reg: + ldr r3, =(Pico+0x22208) @ Pico.m + ldrh r2, [r3, #0x0a] + mov r1, r1, lsr #8 + orr r2, r1, r2, lsr #1 + bic r2, r2, #0xfe00 + strh r2, [r3, #0x0a] + bx lr + + +m_write8_not_z80: + and r2, r0, #0xe70000 + cmp r2, #0xc00000 @ VDP area? + bne m_write8_misc4 + and r2, r0, #0xf9 + cmp r2, #0x11 + bne m_write8_misc4 +m_write8_psg: + ldr r2, =PicoOpt + mov r0, r1 + ldr r2, [r2] + tst r2, #2 + bxeq lr + ldr r2, =SN76496Write + bx r2 + + +m_write8_misc4: + @ passthrough + ldr r2, =OtherWrite8 + bx r2 + diff --git a/Pico/MemoryCmn.c b/Pico/MemoryCmn.c index 09710be..b93ac69 100644 --- a/Pico/MemoryCmn.c +++ b/Pico/MemoryCmn.c @@ -15,38 +15,6 @@ u32 OtherRead16End(u32 a, int realsize); static void OtherWrite8End(u32 a,u32 d,int realsize); #endif -static int PadRead(int i) -{ - int pad=0,value=0,TH; - pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU - TH=Pico.ioports[i+1]&0x40; - - if(PicoOpt & 0x20) { // 6 button gamepad enabled - int phase = Pico.m.padTHPhase[i]; - - if(phase == 2 && !TH) { - value=(pad&0xc0)>>2; // ?0SA 0000 - goto end; - } else if(phase == 3 && TH) { - value=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ - goto end; - } else if(phase == 3 && !TH) { - value=((pad&0xc0)>>2)|0x0f; // ?0SA 1111 - goto end; - } - } - - if(TH) value=(pad&0x3f); // ?1CB RLDU - else value=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU - - end: - - // orr the bits, which are set as output - value |= Pico.ioports[i+1]&Pico.ioports[i+4]; - - return value; // will mirror later -} - #ifndef _ASM_MEMORY_C static @@ -78,32 +46,64 @@ u8 z80Read8(u32 a) return Pico.zram[a]; } - #ifndef _ASM_MEMORY_C static #endif -u32 OtherRead16(u32 a, int realsize) +u32 z80ReadBusReq(void) { - u32 d=0; + u32 d=Pico.m.z80Run&1; + if (!d) { + // needed by buggy Terminator (Sega CD) + int stop_before = SekCyclesDone() - z80stopCycle; + dprintf("stop before: %i", stop_before); + if (stop_before > 0 && stop_before <= 32) // Gens uses 16 here + d = 1; // bus not yet available + } + // |=0x80 for Shadow of the Beast & Super Offroad + return d|0x80; +} - if ((a&0xff0000)==0xa00000) { - if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped) - if ((a&0x6000)==0x4000) { // 0x4000-0x5fff, Fudge if disabled - if(PicoOpt&1) d=YM2612Read(); - else d=Pico.m.rotate++&3; - dprintf("read ym2612: %04x", d); - goto end; +#ifndef _ASM_MEMORY_C +static +#endif +void z80WriteBusReq(u32 d) +{ + d&=1; d^=1; + if(!d) { + // this is for a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III) + if (Pico.m.z80Run) { + int lineCycles; + z80stopCycle = SekCyclesDone(); + if (Pico.m.z80Run&2) + lineCycles=(488-SekCyclesLeft)&0x1ff; + else lineCycles=z80stopCycle-z80startCycle; // z80 was started at current line + if (lineCycles > 0 && lineCycles <= 488) { + dprintf("zrun: %i/%i cycles", lineCycles, (lineCycles>>1)-(lineCycles>>5)); + lineCycles=(lineCycles>>1)-(lineCycles>>5); + z80_run(lineCycles); + } } - d=0xffff; - goto end; + } else { + z80startCycle = SekCyclesDone(); + //if(Pico.m.scanline != -1) } + dprintf("set_zrun: %02x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), /*mz80GetRegisterValue(NULL, 0),*/ SekPc); + Pico.m.z80Run=(u8)d; +} + +#ifndef _ASM_MEMORY_C +static +#endif +u32 OtherRead16(u32 a, int realsize) +{ + u32 d=0; if ((a&0xffffe0)==0xa10000) { // I/O ports a=(a>>1)&0xf; switch(a) { case 0: d=Pico.m.hardware; break; // Hardware value (Version register) - case 1: d=PadRead(0); d|=Pico.ioports[1]&0x80; break; - case 2: d=PadRead(1); d|=Pico.ioports[2]&0x80; break; + case 1: d=PadRead(0); break; + case 2: d=PadRead(1); break; default: d=Pico.ioports[a]; break; // IO ports can be used as RAM } d|=d<<8; @@ -112,21 +112,23 @@ u32 OtherRead16(u32 a, int realsize) // |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers if (a==0xa11100) { // z80 busreq - d=Pico.m.z80Run&1; -#if 1 - if (!d) { - // needed by buggy Terminator (Sega CD) - int stop_before = SekCyclesDone() - z80stopCycle; - dprintf("stop before: %i", stop_before); - if (stop_before > 0 && stop_before <= 32) // Gens uses 16 here - d = 1; // bus not yet available - } -#endif - d=(d<<8)|0x8000|Pico.m.rotate++; + d=(z80ReadBusReq()<<8)|Pico.m.rotate++; dprintf("get_zrun: %04x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), SekPc); goto end; } + if ((a&0xff0000)==0xa00000) { + if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped) + if ((a&0x6000)==0x4000) { // 0x4000-0x5fff, Fudge if disabled + if(PicoOpt&1) d=YM2612Read(); + else d=Pico.m.rotate++&3; + dprintf("read ym2612: %04x", d); + goto end; + } + d=0xffff; + goto end; + } + #ifndef _ASM_MEMORY_C if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; } #endif @@ -137,63 +139,41 @@ end: return d; } - -//extern UINT32 mz80GetRegisterValue(void *, UINT32); +static void IoWrite8(u32 a, u32 d) +{ + a=(a>>1)&0xf; + // 6 button gamepad: if TH went from 0 to 1, gamepad changes state + if(PicoOpt&0x20) { + if(a==1) { + Pico.m.padDelay[0] = 0; + if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++; + } + else if(a==2) { + Pico.m.padDelay[1] = 0; + if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++; + } + } + Pico.ioports[a]=(u8)d; // IO ports can be used as RAM +} #ifndef _ASM_CD_MEMORY_C static #endif -void OtherWrite8(u32 a,u32 d,int realsize) +void OtherWrite8(u32 a,u32 d) { +#ifndef _ASM_MEMORY_C if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound - if ((a&0xffffe0)==0xa10000) { // I/O ports - a=(a>>1)&0xf; - // 6 button gamepad: if TH went from 0 to 1, gamepad changes state - if(PicoOpt&0x20) { - if(a==1) { - Pico.m.padDelay[0] = 0; - if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++; - } - else if(a==2) { - Pico.m.padDelay[1] = 0; - if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++; - } - } - Pico.ioports[a]=(u8)d; // IO ports can be used as RAM - return; - } - if (a==0xa11100) { - //int lineCycles=(488-SekCyclesLeft)&0x1ff; - d&=1; d^=1; - if(!d) { - // this is for a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III) - if (Pico.m.z80Run) { - int lineCycles; - z80stopCycle = SekCyclesDone(); - if (Pico.m.z80Run&2) - lineCycles=(488-SekCyclesLeft)&0x1ff; - else lineCycles=z80stopCycle-z80startCycle; // z80 was started at current line - if (lineCycles > 0 && lineCycles <= 488) { - dprintf("zrun: %i/%i cycles", lineCycles, (lineCycles>>1)-(lineCycles>>5)); - lineCycles=(lineCycles>>1)-(lineCycles>>5); - z80_run(lineCycles); - } - } - } else { - z80startCycle = SekCyclesDone(); - //if(Pico.m.scanline != -1) - } - dprintf("set_zrun: %02x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), /*mz80GetRegisterValue(NULL, 0),*/ SekPc); - Pico.m.z80Run=(u8)d; return; - } + if ((a&0xffffe0)==0xa10000) { IoWrite8(a, d); return; } // I/O ports +#endif + if (a==0xa11100) { z80WriteBusReq(d); return; } if (a==0xa11200) { dprintf("write z80Reset: %02x", d); if(!(d&1)) z80_reset(); return; } - +#ifndef _ASM_MEMORY_C if ((a&0xff7f00)==0xa06000) // Z80 BANK register { Pico.m.z80_bank68k>>=1; @@ -201,13 +181,13 @@ void OtherWrite8(u32 a,u32 d,int realsize) Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one return; } - +#endif if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored return; } - OtherWrite8End(a, d, realsize); + OtherWrite8End(a, d, 8); } @@ -217,29 +197,22 @@ static void OtherWrite16(u32 a,u32 d) { if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } + if (a==0xa11100) { z80WriteBusReq(d>>8); return; } + if (a==0xa11200) { dprintf("write z80reset: %04x", d); if(!(d&0x100)) z80_reset(); return; } + if ((a&0xffffe0)==0xa10000) { IoWrite8(a, d); return; } // I/O ports if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only) - - if ((a&0xffffe0)==0xa10000) { // I/O ports - a=(a>>1)&0xf; - // 6 button gamepad: if TH went from 0 to 1, gamepad changes state - if(PicoOpt&0x20) { - if(a==1) { - Pico.m.padDelay[0] = 0; - if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++; - } - else if(a==2) { - Pico.m.padDelay[1] = 0; - if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++; - } - } - Pico.ioports[a]=(u8)d; // IO ports can be used as RAM + if ((a&0xe700f8)==0xc00010||(a&0xff7ff8)==0xa07f10) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound + if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound (??) + if ((a&0xff7f00)==0xa06000) // Z80 BANK register + { + Pico.m.z80_bank68k>>=1; + Pico.m.z80_bank68k|=(d&1)<<8; + Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one return; } - if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; } - if (a==0xa11200) { dprintf("write z80reset: %04x", d); if(!(d&0x100)) z80_reset(); return; } - OtherWrite8(a, d>>8, 16); - OtherWrite8(a+1,d&0xff, 16); + OtherWrite8End(a, d>>8, 16); + OtherWrite8End(a+1,d&0xff, 16); } diff --git a/Pico/PicoInt.h b/Pico/PicoInt.h index d98a900..e922943 100644 --- a/Pico/PicoInt.h +++ b/Pico/PicoInt.h @@ -154,17 +154,17 @@ struct PicoMisc { unsigned char rotate; unsigned char z80Run; - unsigned char padTHPhase[2]; // phase of gamepad TH switches - short scanline; // 0 to 261||311; -1 in fast mode - char dirtyPal; // Is the palette dirty (1 - change @ this frame, 2 - some time before) - unsigned char hardware; // Hardware value for country - unsigned char pal; // 1=PAL 0=NTSC - unsigned char sram_reg; // SRAM mode register. bit0: allow read? bit1: deny write? bit2: EEPROM? bit4: detected? (header or by access) - unsigned short z80_bank68k; + unsigned char padTHPhase[2]; // 02 phase of gamepad TH switches + short scanline; // 04 0 to 261||311; -1 in fast mode + char dirtyPal; // 06 Is the palette dirty (1 - change @ this frame, 2 - some time before) + unsigned char hardware; // 07 Hardware value for country + unsigned char pal; // 08 1=PAL 0=NTSC + unsigned char sram_reg; // SRAM mode register. bit0: allow read? bit1: deny write? bit2: EEPROM? bit4: detected? (header or by access) + unsigned short z80_bank68k; // 0a unsigned short z80_lastaddr; // this is for Z80 faking unsigned char z80_fakeval; unsigned char pad0; - unsigned char padDelay[2]; // gamepad phase time outs, so we count a delay + unsigned char padDelay[2]; // 10 gamepad phase time outs, so we count a delay unsigned short sram_addr; // EEPROM address register unsigned char sram_cycle; // EEPROM SRAM cycle number unsigned char sram_slave; // EEPROM slave word for X24C02 and better SRAMs @@ -297,6 +297,7 @@ PICO_INTERNAL int PicoInitPc(unsigned int pc); PICO_INTERNAL_ASM unsigned int CPU_CALL PicoRead32(unsigned int a); PICO_INTERNAL void PicoMemSetup(void); PICO_INTERNAL_ASM void PicoMemReset(void); +PICO_INTERNAL int PadRead(int i); PICO_INTERNAL unsigned char z80_read(unsigned short a); PICO_INTERNAL unsigned short z80_read16(unsigned short a); PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a); diff --git a/Pico/cd/Memory.s b/Pico/cd/Memory.s index cedab28..7b19e61 100644 --- a/Pico/cd/Memory.s +++ b/Pico/cd/Memory.s @@ -139,6 +139,8 @@ m_s68k_decode_write_table: .extern PicoCpuS68k .extern s68k_poll_detect .extern SN76496Write +.extern m_m68k_read8_misc +.extern m_m68k_write8_misc @ r0=reg3, r1-r3=temp @@ -502,7 +504,7 @@ m_m68k_read8_system_io: bic r2, r0, #0xfe0000 bic r2, r2, #0x3f cmp r2, #0x012000 - bne m_m68k_read8_misc + bne m_m68k_read8_misc @ now from Pico/Memory.s ldr r1, =(Pico+0x22200) and r0, r0, #0x3f @@ -588,7 +590,7 @@ m_m68k_read8_hi: ldrb r0, [r1, r0] bx lr - +/* m_m68k_read8_misc: bic r2, r0, #0x00ff bic r2, r2, #0xbf00 @@ -604,7 +606,7 @@ m_m68k_read8_misc: tst r1, #1 moveq r0, r0, lsr #8 bx lr - +*/ m_m68k_read8_vdp: tst r0, #0x70000 @@ -1116,7 +1118,8 @@ m_m68k_write8_system_io: cmp r2, #0x012000 beq m68k_reg_write8 mov r2, #8 - b OtherWrite8 +@ b OtherWrite8 + b m_m68k_write8_misc m_m68k_write8_vdp: diff --git a/cpu/DrZ80/drz80.s b/cpu/DrZ80/drz80.s index eba8b95..53f4c98 100644 --- a/cpu/DrZ80/drz80.s +++ b/cpu/DrZ80/drz80.s @@ -111,40 +111,37 @@ DrZ80Ver: .long 0x0001 .if DRZ80_FOR_PICODRIVE .macro YM2612Read_and_ret8 - stmfd sp!,{r3,r12,lr} + stmfd sp!,{r3,r12,lr} .if EXTERNAL_YM2612 ldr r1,=PicoOpt ldr r1,[r1] tst r1,#0x200 - bne 10f - bl YM2612Read_ - ldmfd sp!,{r3,r12,pc} -10: - bl YM2612Read_940 + ldrne r2, =YM2612Read_940 + ldreq r2, =YM2612Read_ + mov lr,pc + bx r2 .else bl YM2612Read_ .endif - ldmfd sp!,{r3,r12,pc} + ldmfd sp!,{r3,r12,pc} .endm .macro YM2612Read_and_ret16 - stmfd sp!,{r3,r12,lr} + stmfd sp!,{r3,r12,lr} .if EXTERNAL_YM2612 ldr r0,=PicoOpt ldr r0,[r0] tst r0,#0x200 - bne 10f - bl YM2612Read_ - orr r0,r0,r0,lsl #8 - ldmfd sp!,{r3,r12,pc} -10: - bl YM2612Read_940 + ldrne r2, =YM2612Read_940 + ldreq r2, =YM2612Read_ + mov lr,pc + bx r2 orr r0,r0,r0,lsl #8 .else bl YM2612Read_ orr r0,r0,r0,lsl #8 .endif - ldmfd sp!,{r3,r12,pc} + ldmfd sp!,{r3,r12,pc} .endm pico_z80_read8: @ addr @@ -173,7 +170,7 @@ pico_z80_read8: @ addr cmp r1,#2 @ YM2612 (0x4000-0x5fff) bne 0f and r0,r0,#3 - YM2612Read_and_ret8 + YM2612Read_and_ret8 0: cmp r0,#0x4000 movge r0,#0xff diff --git a/platform/linux/Makefile b/platform/linux/Makefile index 880c27d..015da6e 100644 --- a/platform/linux/Makefile +++ b/platform/linux/Makefile @@ -74,6 +74,9 @@ PicoDrive : $(OBJS) ../gp2x/helix/helix_mp3_x86.a @$(GCC) $(COPT) $^ $(LDFLAGS) -lm -lpng -Wl,-Map=PicoDrive.map -o $@ +../../cpu/musashi/m68kops.c : + @make -C ../../cpu/musashi + ../../cpu/mz80/mz80.o : ../../cpu/mz80/mz80.asm @echo $@ @nasm -f elf $< -o $@ -- 2.39.2