X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.s;h=a3f2bdc61f4deaaa5fadc590a162e3e4da893dc3;hb=e5503e2f4fe1c7ccc46c493a1596fb0e416f678e;hp=1c259f23e862da4b6412043314cf693c7d34a7e8;hpb=721cd3963fa4ba82ca218345e8f543703dc46c90;p=picodrive.git diff --git a/Pico/Memory.s b/Pico/Memory.s index 1c259f2..a3f2bdc 100644 --- a/Pico/Memory.s +++ b/Pico/Memory.s @@ -3,10 +3,11 @@ @ memory handlers with banking support for SSF II - The New Challengers @ mostly based on Gens code -@ (c) Copyright 2006, notaz +@ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas @ All Rights Reserved +.include "port_config.s" .text @@ -21,7 +22,7 @@ m_read8_def_table: .long m_read8_rom5 @ 0x280000 - 0x2FFFFF .long m_read8_rom6 @ 0x300000 - 0x37FFFF .long m_read8_rom7 @ 0x380000 - 0x3FFFFF - .long m_read8_rom8 @ 0x400000 - 0x47FFFF + .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks .long m_read8_rom9 @ 0x480000 - 0x4FFFFF .long m_read8_romA @ 0x500000 - 0x57FFFF .long m_read8_romB @ 0x580000 - 0x5FFFFF @@ -29,10 +30,10 @@ m_read8_def_table: .long m_read8_romD @ 0x680000 - 0x6FFFFF .long m_read8_romE @ 0x700000 - 0x77FFFF .long m_read8_romF @ 0x780000 - 0x7FFFFF - .long m_read_null @ 0x800000 - 0x87FFFF - .long m_read_null @ 0x880000 - 0x8FFFFF - .long m_read_null @ 0x900000 - 0x97FFFF - .long m_read_null @ 0x980000 - 0x9FFFFF + .long m_read8_rom10 @ 0x800000 - 0x87FFFF + .long m_read8_rom11 @ 0x880000 - 0x8FFFFF + .long m_read8_rom12 @ 0x900000 - 0x97FFFF + .long m_read8_rom13 @ 0x980000 - 0x9FFFFF .long m_read8_misc @ 0xA00000 - 0xA7FFFF .long m_read_null @ 0xA80000 - 0xAFFFFF .long m_read_null @ 0xB00000 - 0xB7FFFF @@ -63,10 +64,10 @@ m_read16_def_table: .long m_read16_romD @ 0x680000 - 0x6FFFFF .long m_read16_romE @ 0x700000 - 0x77FFFF .long m_read16_romF @ 0x780000 - 0x7FFFFF - .long m_read_null @ 0x800000 - 0x87FFFF - .long m_read_null @ 0x880000 - 0x8FFFFF - .long m_read_null @ 0x900000 - 0x97FFFF - .long m_read_null @ 0x980000 - 0x9FFFFF + .long m_read16_rom10 @ 0x800000 - 0x87FFFF + .long m_read16_rom11 @ 0x880000 - 0x8FFFFF + .long m_read16_rom12 @ 0x900000 - 0x97FFFF + .long m_read16_rom13 @ 0x980000 - 0x9FFFFF .long m_read16_misc @ 0xA00000 - 0xA7FFFF .long m_read_null @ 0xA80000 - 0xAFFFFF .long m_read_null @ 0xB00000 - 0xB7FFFF @@ -97,10 +98,10 @@ m_read32_def_table: .long m_read32_romD @ 0x680000 - 0x6FFFFF .long m_read32_romE @ 0x700000 - 0x77FFFF .long m_read32_romF @ 0x780000 - 0x7FFFFF - .long m_read_null @ 0x800000 - 0x87FFFF - .long m_read_null @ 0x880000 - 0x8FFFFF - .long m_read_null @ 0x900000 - 0x97FFFF - .long m_read_null @ 0x980000 - 0x9FFFFF + .long m_read32_rom10 @ 0x800000 - 0x87FFFF + .long m_read32_rom11 @ 0x880000 - 0x8FFFFF + .long m_read32_rom12 @ 0x900000 - 0x97FFFF + .long m_read32_rom13 @ 0x980000 - 0x9FFFFF .long m_read32_misc @ 0xA00000 - 0xA7FFFF .long m_read_null @ 0xA80000 - 0xAFFFFF .long m_read_null @ 0xB00000 - 0xB7FFFF @@ -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: @@ -329,7 +333,6 @@ m_read8_rom8: @ 0x400000 - 0x47ffff m_read8_rom9: @ 0x480000 - 0x4fffff m_read8_rom 9 -@ is any ROM using that much? m_read8_romA: @ 0x500000 - 0x57ffff m_read8_rom 0xA @@ -348,12 +351,82 @@ m_read8_romE: @ 0x700000 - 0x77ffff m_read8_romF: @ 0x780000 - 0x7fffff m_read8_rom 0xF +m_read8_rom10: @ 0x800000 - 0x87ffff + m_read8_rom 0x10 + +m_read8_rom11: @ 0x880000 - 0x8fffff + m_read8_rom 0x11 + +m_read8_rom12: @ 0x900000 - 0x97ffff + m_read8_rom 0x12 + +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 @@ -363,6 +436,7 @@ m_read8_misc: moveq r0, r0, lsr #8 bx lr + m_read8_vdp: tst r0, #0x70000 tsteq r0, #0x000e0 @@ -468,7 +542,6 @@ m_read16_rom8: @ 0x400000 - 0x47ffff m_read16_rom9: @ 0x480000 - 0x4fffff m_read16_rom 9 -@ is any ROM using that much? m_read16_romA: @ 0x500000 - 0x57ffff m_read16_rom 0xA @@ -487,6 +560,18 @@ m_read16_romE: @ 0x700000 - 0x77ffff m_read16_romF: @ 0x780000 - 0x7fffff m_read16_rom 0xF +m_read16_rom10: @ 0x800000 - 0x87ffff + m_read16_rom 0x10 + +m_read16_rom11: @ 0x880000 - 0x8fffff + m_read16_rom 0x11 + +m_read16_rom12: @ 0x900000 - 0x97ffff + m_read16_rom 0x12 + +m_read16_rom13: @ 0x980000 - 0x9fffff + m_read16_rom 0x13 + m_read16_misc: bic r0, r0, #1 mov r1, #16 @@ -595,7 +680,6 @@ m_read32_rom8: @ 0x400000 - 0x47ffff m_read32_rom9: @ 0x480000 - 0x4fffff m_read32_rom 9 -@ is any ROM using that much? m_read32_romA: @ 0x500000 - 0x57ffff m_read32_rom 0xA @@ -614,6 +698,18 @@ m_read32_romE: @ 0x700000 - 0x77ffff m_read32_romF: @ 0x780000 - 0x7fffff m_read32_rom 0xF +m_read32_rom10: @ 0x800000 - 0x87ffff + m_read32_rom 0x10 + +m_read32_rom11: @ 0x880000 - 0x8fffff + m_read32_rom 0x11 + +m_read32_rom12: @ 0x900000 - 0x97ffff + m_read32_rom 0x12 + +m_read32_rom13: @ 0x980000 - 0x9fffff + m_read32_rom 0x13 + m_read32_misc: bic r0, r0, #1 stmfd sp!,{r0,lr} @@ -705,3 +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 +