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- @ vim:filetype=armasm
- @ memory handlers with banking support for SSF II - The New Challengers
- @ mostly based on Gens code
- @ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas
- @ All Rights Reserved
- .include "port_config.s"
- .text
- .align 4
- @ default jump tables
- m_read8_def_table:
- .long m_read8_rom0 @ 0x000000 - 0x07FFFF
- .long m_read8_rom1 @ 0x080000 - 0x0FFFFF
- .long m_read8_rom2 @ 0x100000 - 0x17FFFF
- .long m_read8_rom3 @ 0x180000 - 0x1FFFFF
- .long m_read8_rom4 @ 0x200000 - 0x27FFFF
- .long m_read8_rom5 @ 0x280000 - 0x2FFFFF
- .long m_read8_rom6 @ 0x300000 - 0x37FFFF
- .long m_read8_rom7 @ 0x380000 - 0x3FFFFF
- .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
- .long m_read8_romC @ 0x600000 - 0x67FFFF
- .long m_read8_romD @ 0x680000 - 0x6FFFFF
- .long m_read8_romE @ 0x700000 - 0x77FFFF
- .long m_read8_romF @ 0x780000 - 0x7FFFFF
- .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
- .long m_read_null @ 0xB80000 - 0xBFFFFF
- .long m_read8_vdp @ 0xC00000 - 0xC7FFFF
- .long m_read8_vdp @ 0xC80000 - 0xCFFFFF
- .long m_read8_vdp @ 0xD00000 - 0xD7FFFF
- .long m_read8_vdp @ 0xD80000 - 0xDFFFFF
- .long m_read8_ram @ 0xE00000 - 0xE7FFFF
- .long m_read8_ram @ 0xE80000 - 0xEFFFFF
- .long m_read8_ram @ 0xF00000 - 0xF7FFFF
- .long m_read8_ram @ 0xF80000 - 0xFFFFFF
- m_read16_def_table:
- .long m_read16_rom0 @ 0x000000 - 0x07FFFF
- .long m_read16_rom1 @ 0x080000 - 0x0FFFFF
- .long m_read16_rom2 @ 0x100000 - 0x17FFFF
- .long m_read16_rom3 @ 0x180000 - 0x1FFFFF
- .long m_read16_rom4 @ 0x200000 - 0x27FFFF
- .long m_read16_rom5 @ 0x280000 - 0x2FFFFF
- .long m_read16_rom6 @ 0x300000 - 0x37FFFF
- .long m_read16_rom7 @ 0x380000 - 0x3FFFFF
- .long m_read16_rom8 @ 0x400000 - 0x47FFFF
- .long m_read16_rom9 @ 0x480000 - 0x4FFFFF
- .long m_read16_romA @ 0x500000 - 0x57FFFF
- .long m_read16_romB @ 0x580000 - 0x5FFFFF
- .long m_read16_romC @ 0x600000 - 0x67FFFF
- .long m_read16_romD @ 0x680000 - 0x6FFFFF
- .long m_read16_romE @ 0x700000 - 0x77FFFF
- .long m_read16_romF @ 0x780000 - 0x7FFFFF
- .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
- .long m_read_null @ 0xB80000 - 0xBFFFFF
- .long m_read16_vdp @ 0xC00000 - 0xC7FFFF
- .long m_read16_vdp @ 0xC80000 - 0xCFFFFF
- .long m_read16_vdp @ 0xD00000 - 0xD7FFFF
- .long m_read16_vdp @ 0xD80000 - 0xDFFFFF
- .long m_read16_ram @ 0xE00000 - 0xE7FFFF
- .long m_read16_ram @ 0xE80000 - 0xEFFFFF
- .long m_read16_ram @ 0xF00000 - 0xF7FFFF
- .long m_read16_ram @ 0xF80000 - 0xFFFFFF
- m_read32_def_table:
- .long m_read32_rom0 @ 0x000000 - 0x07FFFF
- .long m_read32_rom1 @ 0x080000 - 0x0FFFFF
- .long m_read32_rom2 @ 0x100000 - 0x17FFFF
- .long m_read32_rom3 @ 0x180000 - 0x1FFFFF
- .long m_read32_rom4 @ 0x200000 - 0x27FFFF
- .long m_read32_rom5 @ 0x280000 - 0x2FFFFF
- .long m_read32_rom6 @ 0x300000 - 0x37FFFF
- .long m_read32_rom7 @ 0x380000 - 0x3FFFFF
- .long m_read32_rom8 @ 0x400000 - 0x47FFFF
- .long m_read32_rom9 @ 0x480000 - 0x4FFFFF
- .long m_read32_romA @ 0x500000 - 0x57FFFF
- .long m_read32_romB @ 0x580000 - 0x5FFFFF
- .long m_read32_romC @ 0x600000 - 0x67FFFF
- .long m_read32_romD @ 0x680000 - 0x6FFFFF
- .long m_read32_romE @ 0x700000 - 0x77FFFF
- .long m_read32_romF @ 0x780000 - 0x7FFFFF
- .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
- .long m_read_null @ 0xB80000 - 0xBFFFFF
- .long m_read32_vdp @ 0xC00000 - 0xC7FFFF
- .long m_read32_vdp @ 0xC80000 - 0xCFFFFF
- .long m_read32_vdp @ 0xD00000 - 0xD7FFFF
- .long m_read32_vdp @ 0xD80000 - 0xDFFFFF
- .long m_read32_ram @ 0xE00000 - 0xE7FFFF
- .long m_read32_ram @ 0xE80000 - 0xEFFFFF
- .long m_read32_ram @ 0xF00000 - 0xF7FFFF
- .long m_read32_ram @ 0xF80000 - 0xFFFFFF
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- .bss
- .align 4
- @.section .bss, "brw"
- @.data
- @ used tables
- m_read8_table:
- .skip 32*4
- m_read16_table:
- .skip 32*4
- m_read32_table:
- .skip 32*4
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- .text
- .align 4
- .global PicoMemReset
- .global PicoRead8
- .global PicoRead16
- .global PicoRead32
- .global PicoWrite8
- .global PicoWriteRomHW_SSF2
- .global m_m68k_read8_misc
- .global m_m68k_write8_misc
- PicoMemReset:
- ldr r12,=(Pico+0x22204)
- ldr r12,[r12] @ romsize
- add r12,r12,#0x80000
- sub r12,r12,#1
- mov r12,r12,lsr #19
- ldr r0, =m_read8_table
- ldr r1, =m_read8_def_table
- mov r2, #32
- 1:
- ldr r3, [r1], #4
- str r3, [r0], #4
- subs r2, r2, #1
- bne 1b
- ldr r0, =m_read16_table
- ldr r1, =m_read16_def_table
- mov r2, #32
- 1:
- subs r2, r2, #1
- ldr r3, [r1], #4
- str r3, [r0], #4
- bne 1b
- ldr r0, =m_read32_table
- ldr r1, =m_read32_def_table
- mov r2, #32
- 1:
- subs r2, r2, #1
- ldr r3, [r1], #4
- str r3, [r0], #4
- bne 1b
- @ update memhandlers according to ROM size
- ldr r1, =m_read8_above_rom
- ldr r0, =m_read8_table
- mov r2, #20
- 1:
- sub r2, r2, #1
- cmp r2, r12
- blt 2f
- cmp r2, #4
- beq 1b @ do not touch the SRAM area
- str r1, [r0, r2, lsl #2]
- b 1b
- 2:
- ldr r1, =m_read16_above_rom
- ldr r0, =m_read16_table
- mov r2, #20
- 1:
- sub r2, r2, #1
- cmp r2, r12
- blt 2f
- cmp r2, #4
- beq 1b
- str r1, [r0, r2, lsl #2]
- b 1b
- 2:
- ldr r1, =m_read32_above_rom
- ldr r0, =m_read32_table
- mov r2, #20
- 1:
- sub r2, r2, #1
- cmp r2, r12
- blt 2f
- cmp r2, #4
- beq 1b
- str r1, [r0, r2, lsl #2]
- b 1b
- 2:
- bx lr
- .pool
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- PicoRead8: @ u32 a
- ldr r2, =m_read8_table
- bic r0, r0, #0xff000000
- and r1, r0, #0x00f80000
- ldr pc, [r2, r1, lsr #17]
- PicoRead16: @ u32 a
- ldr r2, =m_read16_table
- bic r0, r0, #0xff000000
- and r1, r0, #0x00f80000
- ldr pc, [r2, r1, lsr #17]
- PicoRead32: @ u32 a
- ldr r2, =m_read32_table
- bic r0, r0, #0xff000000
- and r1, r0, #0x00f80000
- ldr pc, [r2, r1, lsr #17]
- .pool
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- m_read_null:
- mov r0, #0
- bx lr
- .macro m_read8_rom sect
- ldr r1, =(Pico+0x22200)
- bic r0, r0, #0xf80000
- ldr r1, [r1]
- .if \sect
- orr r0, r0, #0x080000*\sect
- .endif
- eor r0, r0, #1
- ldrb r0, [r1, r0]
- bx lr
- .endm
- m_read8_rom0: @ 0x000000 - 0x07ffff
- m_read8_rom 0
- m_read8_rom1: @ 0x080000 - 0x0fffff
- m_read8_rom 1
- m_read8_rom2: @ 0x100000 - 0x17ffff
- m_read8_rom 2
- m_read8_rom3: @ 0x180000 - 0x1fffff
- m_read8_rom 3
- m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area
- ldr r2, =(SRam)
- ldr r3, =(Pico+0x22200)
- ldr r1, [r2, #8] @ SRam.end
- bic r0, r0, #0xf80000
- orr r0, r0, #0x200000
- cmp r0, r1
- bgt m_read8_nosram
- ldr r1, [r2, #4] @ SRam.start
- cmp r0, r1
- blt m_read8_nosram
- ldrb r1, [r3, #0x11] @ Pico.m.sram_reg
- tst r1, #5
- bne SRAMRead
- m_read8_nosram:
- ldr r1, [r3, #4] @ romsize
- cmp r0, r1
- movgt r0, #0
- bxgt lr @ bad location
- ldr r1, [r3]
- eor r0, r0, #1
- ldrb r0, [r1, r0]
- bx lr
- m_read8_rom5: @ 0x280000 - 0x2fffff
- m_read8_rom 5
- m_read8_rom6: @ 0x300000 - 0x37ffff
- m_read8_rom 6
- m_read8_rom7: @ 0x380000 - 0x3fffff
- m_read8_rom 7
- m_read8_rom8: @ 0x400000 - 0x47ffff
- m_read8_rom 8
- m_read8_rom9: @ 0x480000 - 0x4fffff
- m_read8_rom 9
- m_read8_romA: @ 0x500000 - 0x57ffff
- m_read8_rom 0xA
- m_read8_romB: @ 0x580000 - 0x5fffff
- m_read8_rom 0xB
- m_read8_romC: @ 0x600000 - 0x67ffff
- m_read8_rom 0xC
- m_read8_romD: @ 0x680000 - 0x6fffff
- m_read8_rom 0xD
- m_read8_romE: @ 0x700000 - 0x77ffff
- m_read8_rom 0xE
- 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, #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
- movlt r0, #0
- moveq r0, #1
- ble PadRead
- 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
- beq z80ReadBusReq
- and r2, r0, #0xff0000 @ finally it might be
- cmp r2, #0xa00000 @ z80 area
- bne m_read8_misc3
- tst r0, #0x4000
- beq z80Read8 @ z80 RAM
- and r2, r0, #0x6000
- cmp r2, #0x4000
- mvnne r0, #0
- bxne lr @ invalid
- b ym2612_read_local_68k
- 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
- bl OtherRead16
- ldmfd sp!,{r1,lr}
- tst r1, #1
- moveq r0, r0, lsr #8
- bx lr
- m_read8_vdp:
- tst r0, #0x70000
- tsteq r0, #0x000e0
- bxne lr @ invalid read
- b PicoVideoRead8
- m_read8_ram:
- ldr r1, =Pico
- bic r0, r0, #0xff0000
- eor r0, r0, #1
- ldrb r0, [r1, r0]
- bx lr
- m_read8_above_rom:
- @ might still be SRam (Micro Machines, HardBall '95)
- ldr r2, =(SRam)
- ldr r3, =(Pico+0x22200)
- ldr r1, [r2, #8] @ SRam.end
- cmp r0, r1
- bgt m_read8_ar_nosram
- ldr r1, [r2, #4] @ SRam.start
- cmp r0, r1
- blt m_read8_ar_nosram
- ldrb r1, [r3, #0x11] @ Pico.m.sram_reg
- tst r1, #5
- bne SRAMRead
- m_read8_ar_nosram:
- ldr r2, =PicoRead16Hook
- stmfd sp!,{r0,lr}
- ldr r2, [r2]
- bic r0, r0, #1
- mov r1, #8
- mov lr, pc
- bx r2
- ldmfd sp!,{r1,lr}
- tst r1, #1
- moveq r0, r0, lsr #8
- bx lr
- .pool
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- .macro m_read16_rom sect
- ldr r1, =(Pico+0x22200)
- bic r0, r0, #0xf80000
- ldr r1, [r1]
- bic r0, r0, #1
- .if \sect
- orr r0, r0, #0x080000*\sect
- .endif
- ldrh r0, [r1, r0]
- bx lr
- .endm
- m_read16_rom0: @ 0x000000 - 0x07ffff
- m_read16_rom 0
- m_read16_rom1: @ 0x080000 - 0x0fffff
- m_read16_rom 1
- m_read16_rom2: @ 0x100000 - 0x17ffff
- m_read16_rom 2
- m_read16_rom3: @ 0x180000 - 0x1fffff
- m_read16_rom 3
- m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)
- ldr r2, =(SRam)
- ldr r3, =(Pico+0x22200)
- ldr r1, [r2, #8] @ SRam.end
- bic r0, r0, #0xf80000
- bic r0, r0, #1
- orr r0, r0, #0x200000
- cmp r0, r1
- bgt m_read16_nosram
- ldr r1, [r2, #4] @ SRam.start
- cmp r0, r1
- blt m_read16_nosram
- ldrb r1, [r3, #0x11] @ Pico.m.sram_reg
- tst r1, #5
- beq m_read16_nosram
- stmfd sp!,{lr}
- bl SRAMRead16
- ldmfd sp!,{pc}
- m_read16_nosram:
- ldr r1, [r3, #4] @ romsize
- cmp r0, r1
- movgt r0, #0
- bxgt lr @ bad location
- ldr r1, [r3] @ 1ci
- ldrh r0, [r1, r0]
- bx lr
- m_read16_rom5: @ 0x280000 - 0x2fffff
- m_read16_rom 5
- m_read16_rom6: @ 0x300000 - 0x37ffff
- m_read16_rom 6
- m_read16_rom7: @ 0x380000 - 0x3fffff
- m_read16_rom 7
- m_read16_rom8: @ 0x400000 - 0x47ffff
- m_read16_rom 8
- m_read16_rom9: @ 0x480000 - 0x4fffff
- m_read16_rom 9
- m_read16_romA: @ 0x500000 - 0x57ffff
- m_read16_rom 0xA
- m_read16_romB: @ 0x580000 - 0x5fffff
- m_read16_rom 0xB
- m_read16_romC: @ 0x600000 - 0x67ffff
- m_read16_rom 0xC
- m_read16_romD: @ 0x680000 - 0x6fffff
- m_read16_rom 0xD
- m_read16_romE: @ 0x700000 - 0x77ffff
- m_read16_rom 0xE
- 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
- b OtherRead16
- m_read16_vdp:
- tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)
- tsteq r0, #0x000e0
- bxne lr @ invalid read
- bic r0, r0, #1
- b PicoVideoRead
- m_read16_ram:
- ldr r1, =Pico
- bic r0, r0, #0xff0000
- bic r0, r0, #1
- ldrh r0, [r1, r0]
- bx lr
- m_read16_above_rom:
- @ might still be SRam
- ldr r2, =(SRam)
- ldr r3, =(Pico+0x22200)
- ldr r1, [r2, #8] @ SRam.end
- bic r0, r0, #1
- cmp r0, r1
- bgt m_read16_ar_nosram
- ldr r1, [r2, #4] @ SRam.start
- cmp r0, r1
- blt m_read16_ar_nosram
- ldrb r1, [r3, #0x11] @ Pico.m.sram_reg
- tst r1, #5
- beq m_read16_ar_nosram
- stmfd sp!,{lr}
- bl SRAMRead16
- ldmfd sp!,{pc}
- m_read16_ar_nosram:
- ldr r2, =PicoRead16Hook
- ldr r2, [r2]
- mov r1, #16
- bx r2
- .pool
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- .macro m_read32_rom sect
- ldr r1, =(Pico+0x22200)
- bic r0, r0, #0xf80000
- ldr r1, [r1]
- bic r0, r0, #1
- .if \sect
- orr r0, r0, #0x080000*\sect
- .endif
- ldrh r0, [r1, r0]!
- ldrh r1, [r1, #2] @ 1ci
- orr r0, r1, r0, lsl #16
- bx lr
- .endm
- m_read32_rom0: @ 0x000000 - 0x07ffff
- m_read32_rom 0
- m_read32_rom1: @ 0x080000 - 0x0fffff
- m_read32_rom 1
- m_read32_rom2: @ 0x100000 - 0x17ffff
- m_read32_rom 2
- m_read32_rom3: @ 0x180000 - 0x1fffff
- m_read32_rom 3
- m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)
- ldr r2, =(SRam)
- ldr r3, =(Pico+0x22200)
- ldr r1, [r2, #8] @ SRam.end
- bic r0, r0, #0xf80000
- bic r0, r0, #1
- orr r0, r0, #0x200000
- cmp r0, r1
- bgt m_read32_nosram
- ldr r1, [r2, #4] @ SRam.start
- cmp r0, r1
- blt m_read32_nosram
- ldrb r1, [r3, #0x11] @ Pico.m.sram_reg
- tst r1, #5
- beq m_read32_nosram
- stmfd sp!,{r0,lr}
- bl SRAMRead16
- ldmfd sp!,{r1,lr}
- stmfd sp!,{r0,lr}
- add r0, r1, #2
- bl SRAMRead16
- ldmfd sp!,{r1,lr}
- orr r0, r0, r1, lsl #16
- bx lr
- m_read32_nosram:
- ldr r1, [r3, #4] @ romsize
- cmp r0, r1
- movgt r0, #0
- bxgt lr @ bad location
- ldr r1, [r3] @ (1ci)
- ldrh r0, [r1, r0]!
- ldrh r1, [r1, #2] @ (2ci)
- orr r0, r1, r0, lsl #16
- bx lr
- m_read32_rom5: @ 0x280000 - 0x2fffff
- m_read32_rom 5
- m_read32_rom6: @ 0x300000 - 0x37ffff
- m_read32_rom 6
- m_read32_rom7: @ 0x380000 - 0x3fffff
- m_read32_rom 7
- m_read32_rom8: @ 0x400000 - 0x47ffff
- m_read32_rom 8
- m_read32_rom9: @ 0x480000 - 0x4fffff
- m_read32_rom 9
- m_read32_romA: @ 0x500000 - 0x57ffff
- m_read32_rom 0xA
- m_read32_romB: @ 0x580000 - 0x5fffff
- m_read32_rom 0xB
- m_read32_romC: @ 0x600000 - 0x67ffff
- m_read32_rom 0xC
- m_read32_romD: @ 0x680000 - 0x6fffff
- m_read32_rom 0xD
- m_read32_romE: @ 0x700000 - 0x77ffff
- m_read32_rom 0xE
- 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}
- mov r1, #32
- bl OtherRead16
- mov r1, r0
- ldmfd sp!,{r0}
- stmfd sp!,{r1}
- add r0, r0, #2
- mov r1, #32
- bl OtherRead16
- ldmfd sp!,{r1,lr}
- orr r0, r0, r1, lsl #16
- bx lr
- m_read32_vdp:
- tst r0, #0x70000
- tsteq r0, #0x000e0
- bxne lr @ invalid read
- bic r0, r0, #1
- add r1, r0, #2
- stmfd sp!,{r1,lr}
- bl PicoVideoRead
- swp r0, r0, [sp]
- bl PicoVideoRead
- ldmfd sp!,{r1,lr}
- orr r0, r0, r1, lsl #16
- bx lr
- m_read32_ram:
- ldr r1, =Pico
- bic r0, r0, #0xff0000
- bic r0, r0, #1
- ldrh r0, [r1, r0]!
- ldrh r1, [r1, #2] @ 2ci
- orr r0, r1, r0, lsl #16
- bx lr
- m_read32_above_rom:
- ldr r2, =PicoRead16Hook
- bic r0, r0, #1
- ldr r2, [r2]
- mov r1, #32
- stmfd sp!,{r0,r2,lr}
- mov lr, pc
- bx r2
- mov r1, r0
- ldmfd sp!,{r0,r2}
- stmfd sp!,{r1}
- add r0, r0, #2
- mov r1, #32
- mov lr, pc
- bx r2
- ldmfd sp!,{r1,lr}
- orr r0, r0, r1, lsl #16
- bx lr
- .pool
- @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- PicoWriteRomHW_SSF2: @ u32 a, u32 d
- and r0, r0, #0xe
- movs r0, r0, lsr #1
- bne pwr_banking
- @ sram register
- ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg
- ldrb r0, [r2]
- and r1, r1, #3
- bic r0, r0, #3
- orr r0, r0, r1
- strb r0, [r2]
- bx lr
- pwr_banking:
- and r1, r1, #0x1f
- ldr r3, =m_read8_def_table
- ldr r2, =m_read8_table
- ldr r12, [r3, r1, lsl #2]
- str r12, [r2, r0, lsl #2]
- ldr r3, =m_read16_def_table
- ldr r2, =m_read16_table
- ldr r12, [r3, r1, lsl #2]
- str r12, [r2, r0, lsl #2]
- ldr r3, =m_read32_def_table
- ldr r2, =m_read32_table
- ldr r12, [r3, r1, lsl #2]
- str r12, [r2, r0, lsl #2]
-
- 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
- ldr r2, =SekCycleCnt
- streqb r1, [r3, r0] @ zram
- ldr r0, [r2]
- add r0, r0, #2 @ hack?
- str r0, [r2]
- bx lr
- m_write8_z80_not_ram:
- and r2, r0, #0x6000
- cmp r2, #0x4000
- bne m_write8_z80_not_ym2612
- ldr r3, =PicoOpt
- and r0, r0, #3
- ldr r3, [r3]
- mov r2, #0 @ is_from_z80 = 0
- tst r3, #1
- bxeq lr
- stmfd sp!,{lr}
- and r1, r1, #0xff
- bl ym2612_write_local
- ldr r2, =emustatus
- ldmfd sp!,{lr}
- ldr r1, [r2]
- and r0, r0, #1
- orr r1, r0, r1
- str r1, [r2] @ emustatus|=ym2612_write_local(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, lsl #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 OtherWrite8 @ passthrough
- and r2, r0, #0xf9
- cmp r2, #0x11
- bne OtherWrite8
- m_write8_psg:
- ldr r2, =PicoOpt
- and r0, r1, #0xff
- ldr r2, [r2]
- tst r2, #2
- bxeq lr
- b SN76496Write
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