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https://github.com/RaySollium99/picodrive.git
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initial import
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa
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704
Pico/Memory.s
Normal file
704
Pico/Memory.s
Normal file
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@ -0,0 +1,704 @@
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@ memory handlers with banking support for SSF II - The New Challengers
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@ mostly based on Gens code
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@ (c) Copyright 2006, notaz
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@ All Rights Reserved
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.text
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@ default jump tables
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m_read8_def_table:
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.long m_read8_rom0 @ 0x000000 - 0x07FFFF
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.long m_read8_rom1 @ 0x080000 - 0x0FFFFF
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.long m_read8_rom2 @ 0x100000 - 0x17FFFF
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.long m_read8_rom3 @ 0x180000 - 0x1FFFFF
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.long m_read8_rom4 @ 0x200000 - 0x27FFFF
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.long m_read8_rom5 @ 0x280000 - 0x2FFFFF
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.long m_read8_rom6 @ 0x300000 - 0x37FFFF
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.long m_read8_rom7 @ 0x380000 - 0x3FFFFF
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.long m_read8_rom8 @ 0x400000 - 0x47FFFF
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.long m_read8_rom9 @ 0x480000 - 0x4FFFFF
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.long m_read8_romA @ 0x500000 - 0x57FFFF
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.long m_read8_romB @ 0x580000 - 0x5FFFFF
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.long m_read8_romC @ 0x600000 - 0x67FFFF
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.long m_read8_romD @ 0x680000 - 0x6FFFFF
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.long m_read8_romE @ 0x700000 - 0x77FFFF
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.long m_read8_romF @ 0x780000 - 0x7FFFFF
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.long m_read_null @ 0x800000 - 0x87FFFF
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.long m_read_null @ 0x880000 - 0x8FFFFF
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.long m_read_null @ 0x900000 - 0x97FFFF
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.long m_read_null @ 0x980000 - 0x9FFFFF
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.long m_read8_misc @ 0xA00000 - 0xA7FFFF
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.long m_read_null @ 0xA80000 - 0xAFFFFF
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.long m_read_null @ 0xB00000 - 0xB7FFFF
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.long m_read_null @ 0xB80000 - 0xBFFFFF
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.long m_read8_vdp @ 0xC00000 - 0xC7FFFF
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.long m_read8_vdp @ 0xC80000 - 0xCFFFFF
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.long m_read_null @ 0xD00000 - 0xD7FFFF
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.long m_read_null @ 0xD80000 - 0xDFFFFF
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.long m_read8_ram @ 0xE00000 - 0xE7FFFF
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.long m_read8_ram @ 0xE80000 - 0xEFFFFF
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.long m_read8_ram @ 0xF00000 - 0xF7FFFF
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.long m_read8_ram @ 0xF80000 - 0xFFFFFF
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m_read16_def_table:
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.long m_read16_rom0 @ 0x000000 - 0x07FFFF
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.long m_read16_rom1 @ 0x080000 - 0x0FFFFF
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.long m_read16_rom2 @ 0x100000 - 0x17FFFF
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.long m_read16_rom3 @ 0x180000 - 0x1FFFFF
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.long m_read16_rom4 @ 0x200000 - 0x27FFFF
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.long m_read16_rom5 @ 0x280000 - 0x2FFFFF
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.long m_read16_rom6 @ 0x300000 - 0x37FFFF
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.long m_read16_rom7 @ 0x380000 - 0x3FFFFF
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.long m_read16_rom8 @ 0x400000 - 0x47FFFF
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.long m_read16_rom9 @ 0x480000 - 0x4FFFFF
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.long m_read16_romA @ 0x500000 - 0x57FFFF
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.long m_read16_romB @ 0x580000 - 0x5FFFFF
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.long m_read16_romC @ 0x600000 - 0x67FFFF
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.long m_read16_romD @ 0x680000 - 0x6FFFFF
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.long m_read16_romE @ 0x700000 - 0x77FFFF
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.long m_read16_romF @ 0x780000 - 0x7FFFFF
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.long m_read_null @ 0x800000 - 0x87FFFF
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.long m_read_null @ 0x880000 - 0x8FFFFF
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.long m_read_null @ 0x900000 - 0x97FFFF
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.long m_read_null @ 0x980000 - 0x9FFFFF
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.long m_read16_misc @ 0xA00000 - 0xA7FFFF
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.long m_read_null @ 0xA80000 - 0xAFFFFF
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.long m_read_null @ 0xB00000 - 0xB7FFFF
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.long m_read_null @ 0xB80000 - 0xBFFFFF
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.long m_read16_vdp @ 0xC00000 - 0xC7FFFF
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.long m_read_null @ 0xC80000 - 0xCFFFFF
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.long m_read_null @ 0xD00000 - 0xD7FFFF
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.long m_read_null @ 0xD80000 - 0xDFFFFF
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.long m_read16_ram @ 0xE00000 - 0xE7FFFF
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.long m_read16_ram @ 0xE80000 - 0xEFFFFF
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.long m_read16_ram @ 0xF00000 - 0xF7FFFF
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.long m_read16_ram @ 0xF80000 - 0xFFFFFF
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m_read32_def_table:
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.long m_read32_rom0 @ 0x000000 - 0x07FFFF
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.long m_read32_rom1 @ 0x080000 - 0x0FFFFF
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.long m_read32_rom2 @ 0x100000 - 0x17FFFF
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.long m_read32_rom3 @ 0x180000 - 0x1FFFFF
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.long m_read32_rom4 @ 0x200000 - 0x27FFFF
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.long m_read32_rom5 @ 0x280000 - 0x2FFFFF
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.long m_read32_rom6 @ 0x300000 - 0x37FFFF
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.long m_read32_rom7 @ 0x380000 - 0x3FFFFF
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.long m_read32_rom8 @ 0x400000 - 0x47FFFF
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.long m_read32_rom9 @ 0x480000 - 0x4FFFFF
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.long m_read32_romA @ 0x500000 - 0x57FFFF
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.long m_read32_romB @ 0x580000 - 0x5FFFFF
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.long m_read32_romC @ 0x600000 - 0x67FFFF
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.long m_read32_romD @ 0x680000 - 0x6FFFFF
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.long m_read32_romE @ 0x700000 - 0x77FFFF
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.long m_read32_romF @ 0x780000 - 0x7FFFFF
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.long m_read_null @ 0x800000 - 0x87FFFF
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.long m_read_null @ 0x880000 - 0x8FFFFF
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.long m_read_null @ 0x900000 - 0x97FFFF
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.long m_read_null @ 0x980000 - 0x9FFFFF
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.long m_read32_misc @ 0xA00000 - 0xA7FFFF
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.long m_read_null @ 0xA80000 - 0xAFFFFF
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.long m_read_null @ 0xB00000 - 0xB7FFFF
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.long m_read_null @ 0xB80000 - 0xBFFFFF
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.long m_read32_vdp @ 0xC00000 - 0xC7FFFF
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.long m_read_null @ 0xC80000 - 0xCFFFFF
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.long m_read_null @ 0xD00000 - 0xD7FFFF
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.long m_read_null @ 0xD80000 - 0xDFFFFF
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.long m_read32_ram @ 0xE00000 - 0xE7FFFF
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.long m_read32_ram @ 0xE80000 - 0xEFFFFF
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.long m_read32_ram @ 0xF00000 - 0xF7FFFF
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.long m_read32_ram @ 0xF80000 - 0xFFFFFF
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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.bss
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@.section .bss, "brw"
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@.data
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@ used tables
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m_read8_table:
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.skip 32*4
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m_read16_table:
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.skip 32*4
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m_read32_table:
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.skip 32*4
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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.text
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.global PicoMemReset
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.global PicoRead8
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.global PicoRead16
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.global PicoRead32
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.global PicoWriteRomHW_SSF2
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PicoMemReset:
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ldr r12,=(Pico+0x22204)
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ldr r12,[r12] @ romsize
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add r12,r12,#0x80000
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sub r12,r12,#1
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mov r12,r12,lsr #19
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ldr r0, =m_read8_table
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ldr r1, =m_read8_def_table
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mov r2, #32
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1:
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ldr r3, [r1], #4
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str r3, [r0], #4
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subs r2, r2, #1
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bne 1b
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ldr r0, =m_read16_table
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ldr r1, =m_read16_def_table
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mov r2, #32
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1:
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subs r2, r2, #1
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ldr r3, [r1], #4
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str r3, [r0], #4
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bne 1b
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ldr r0, =m_read32_table
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ldr r1, =m_read32_def_table
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mov r2, #32
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1:
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subs r2, r2, #1
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ldr r3, [r1], #4
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str r3, [r0], #4
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bne 1b
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@ update memhandlers according to ROM size
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ldr r1, =m_read8_above_rom
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ldr r0, =m_read8_table
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mov r2, #16
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1:
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sub r2, r2, #1
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cmp r2, r12
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blt 2f
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cmp r2, #4
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beq 1b @ do not touch the SRAM area
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str r1, [r0, r2, lsl #2]
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b 1b
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2:
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ldr r1, =m_read16_above_rom
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ldr r0, =m_read16_table
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mov r2, #16
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1:
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sub r2, r2, #1
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cmp r2, r12
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blt 2f
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cmp r2, #4
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beq 1b
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str r1, [r0, r2, lsl #2]
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b 1b
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2:
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ldr r1, =m_read32_above_rom
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ldr r0, =m_read32_table
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mov r2, #16
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1:
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sub r2, r2, #1
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cmp r2, r12
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blt 2f
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cmp r2, #4
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beq 1b
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str r1, [r0, r2, lsl #2]
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b 1b
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2:
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bx lr
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.pool
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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PicoRead8: @ u32 a
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ldr r2, =m_read8_table
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bic r0, r0, #0xff000000
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and r1, r0, #0x00f80000
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ldr pc, [r2, r1, lsr #17]
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PicoRead16: @ u32 a
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ldr r2, =m_read16_table
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bic r0, r0, #0xff000000
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and r1, r0, #0x00f80000
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ldr pc, [r2, r1, lsr #17]
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PicoRead32: @ u32 a
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ldr r2, =m_read32_table
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bic r0, r0, #0xff000000
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and r1, r0, #0x00f80000
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ldr pc, [r2, r1, lsr #17]
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.pool
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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m_read_null:
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mov r0, #0
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bx lr
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.macro m_read8_rom sect
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ldr r1, =(Pico+0x22200)
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bic r0, r0, #0xf80000
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ldr r1, [r1]
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.if \sect
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orr r0, r0, #0x080000*\sect
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.endif
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eor r0, r0, #1
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ldrb r0, [r1, r0]
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bx lr
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.endm
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m_read8_rom0: @ 0x000000 - 0x07ffff
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m_read8_rom 0
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m_read8_rom1: @ 0x080000 - 0x0fffff
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m_read8_rom 1
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m_read8_rom2: @ 0x100000 - 0x17ffff
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m_read8_rom 2
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m_read8_rom3: @ 0x180000 - 0x1fffff
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m_read8_rom 3
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m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area
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ldr r2, =(SRam)
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ldr r3, =(Pico+0x22200)
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ldr r1, [r2, #8] @ SRam.end
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bic r0, r0, #0xf80000
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orr r0, r0, #0x200000
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cmp r0, r1
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bgt m_read8_nosram
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ldr r1, [r2, #4] @ SRam.start (1ci)
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cmp r0, r1
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blt m_read8_nosram
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ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)
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sub r12,r0, #0x200000
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tst r1, #0x10
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bne m_read8_detected
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cmp r12,#1
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ble m_read8_detected
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tst r1, #1
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orrne r1, r1, #0x10
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strneb r1, [r3, #0x11]
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m_read8_detected:
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tst r1, #4 @ EEPROM read?
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ldrne r0, =SRAMReadEEPROM @ (1ci if ne)
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bxne r0
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m_read8_noteeprom:
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tst r1, #1
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beq m_read8_nosram
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ldr r3, [r2] @ SRam.data
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ldr r2, [r2, #4] @ SRam.start (1ci)
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sub r3, r3, r2
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ldrb r0, [r3, r0]
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bx lr
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m_read8_nosram:
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ldr r1, [r3, #4] @ 1ci
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cmp r0, r1
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movgt r0, #0
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bxgt lr @ bad location
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ldr r1, [r3]
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eor r0, r0, #1
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ldrb r0, [r1, r0]
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bx lr
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m_read8_rom5: @ 0x280000 - 0x2fffff
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m_read8_rom 5
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m_read8_rom6: @ 0x300000 - 0x37ffff
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m_read8_rom 6
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m_read8_rom7: @ 0x380000 - 0x3fffff
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m_read8_rom 7
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m_read8_rom8: @ 0x400000 - 0x47ffff
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m_read8_rom 8
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m_read8_rom9: @ 0x480000 - 0x4fffff
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m_read8_rom 9
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@ is any ROM using that much?
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m_read8_romA: @ 0x500000 - 0x57ffff
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m_read8_rom 0xA
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m_read8_romB: @ 0x580000 - 0x5fffff
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m_read8_rom 0xB
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m_read8_romC: @ 0x600000 - 0x67ffff
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m_read8_rom 0xC
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m_read8_romD: @ 0x680000 - 0x6fffff
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m_read8_rom 0xD
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m_read8_romE: @ 0x700000 - 0x77ffff
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m_read8_rom 0xE
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m_read8_romF: @ 0x780000 - 0x7fffff
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m_read8_rom 0xF
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m_read8_misc:
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bic r2, r0, #0x00ff
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bic r2, r2, #0xbf00
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cmp r2, #0xa00000 @ Z80 RAM?
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ldreq r2, =z80Read8
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bxeq r2
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stmfd sp!,{r0,lr}
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bic r0, r0, #1
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mov r1, #8
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bl OtherRead16
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ldmfd sp!,{r1,lr}
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tst r1, #1
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moveq r0, r0, lsr #8
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bx lr
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m_read8_vdp:
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tst r0, #0x70000
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tsteq r0, #0x000e0
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bxne lr @ invalid read
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stmfd sp!,{r0,lr}
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bic r0, r0, #1
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bl PicoVideoRead
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ldmfd sp!,{r1,lr}
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tst r1, #1
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moveq r0, r0, lsr #8
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bx lr
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m_read8_ram:
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ldr r1, =Pico
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bic r0, r0, #0xff0000
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eor r0, r0, #1
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ldrb r0, [r1, r0]
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bx lr
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m_read8_above_rom:
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stmfd sp!,{r0,lr}
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bic r0, r0, #1
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mov r1, #8
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bl UnusualRead16
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ldmfd sp!,{r1,lr}
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tst r1, #1
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moveq r0, r0, lsr #8
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bx lr
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.pool
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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.macro m_read16_rom sect
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ldr r1, =(Pico+0x22200)
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bic r0, r0, #0xf80000
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ldr r1, [r1]
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bic r0, r0, #1
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.if \sect
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orr r0, r0, #0x080000*\sect
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.endif
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ldrh r0, [r1, r0]
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bx lr
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.endm
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m_read16_rom0: @ 0x000000 - 0x07ffff
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m_read16_rom 0
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m_read16_rom1: @ 0x080000 - 0x0fffff
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m_read16_rom 1
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m_read16_rom2: @ 0x100000 - 0x17ffff
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m_read16_rom 2
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m_read16_rom3: @ 0x180000 - 0x1fffff
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m_read16_rom 3
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|
||||
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
|
||||
ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)
|
||||
tst r1, #1
|
||||
beq m_read16_nosram
|
||||
ldr r1, [r2, #4] @ SRam.start (1ci)
|
||||
cmp r0, r1
|
||||
blt m_read16_nosram
|
||||
ldr r2, [r2] @ SRam.data (1ci)
|
||||
sub r2, r2, r1
|
||||
ldrh r0, [r2, r0] @ 2ci
|
||||
and r1, r0, #0xff
|
||||
mov r0, r0, lsr #8
|
||||
orr r0, r0, r1, lsl #8
|
||||
bx lr
|
||||
m_read16_nosram:
|
||||
ldr r1, [r3, #4] @ 1ci
|
||||
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
|
||||
|
||||
@ is any ROM using that much?
|
||||
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_misc:
|
||||
mov r1, #16
|
||||
ldr r2, =OtherRead16
|
||||
bic r0, r0, #1
|
||||
bx r2
|
||||
|
||||
m_read16_vdp:
|
||||
tst r0, #0x70000
|
||||
tsteq r0, #0x000e0
|
||||
bxne lr @ invalid read
|
||||
ldr r1, =PicoVideoRead
|
||||
bic r0, r0, #1
|
||||
bx r1
|
||||
|
||||
m_read16_ram:
|
||||
ldr r1, =Pico
|
||||
bic r0, r0, #0xff0000
|
||||
bic r0, r0, #1
|
||||
ldrh r0, [r1, r0]
|
||||
bx lr
|
||||
|
||||
m_read16_above_rom:
|
||||
mov r1, #16
|
||||
ldr r2, =UnusualRead16
|
||||
bic r0, r0, #1
|
||||
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
|
||||
ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)
|
||||
tst r1, #1
|
||||
beq m_read32_nosram
|
||||
ldr r1, [r2, #4] @ SRam.start (1ci)
|
||||
cmp r0, r1
|
||||
blt m_read32_nosram
|
||||
ldr r2, [r2] @ SRam.data (1ci)
|
||||
sub r2, r2, r1
|
||||
ldrh r0, [r2, r0]! @ (1ci)
|
||||
ldrh r1, [r2, #2]
|
||||
orr r0, r0, r0, lsl #16
|
||||
mov r0, r0, ror #8
|
||||
mov r0, r0, lsl #16
|
||||
orr r0, r0, r1, lsr #8
|
||||
and r1, r1, #0xff
|
||||
orr r0, r0, r1, lsl #8
|
||||
bx lr
|
||||
m_read32_nosram:
|
||||
ldr r1, [r3, #4] @ (1ci)
|
||||
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
|
||||
|
||||
@ is any ROM using that much?
|
||||
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_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
|
||||
stmfd sp!,{r0,lr}
|
||||
bl PicoVideoRead
|
||||
mov r1, r0
|
||||
ldmfd sp!,{r0}
|
||||
stmfd sp!,{r1}
|
||||
add r0, r0, #2
|
||||
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:
|
||||
bic r0, r0, #1
|
||||
stmfd sp!,{r0,lr}
|
||||
mov r1, #32
|
||||
bl UnusualRead16
|
||||
mov r1, r0
|
||||
ldmfd sp!,{r0}
|
||||
stmfd sp!,{r1}
|
||||
add r0, r0, #2
|
||||
mov r1, #32
|
||||
bl UnusualRead16
|
||||
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
|
||||
and r1, r1, #3
|
||||
strb r1, [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
|
||||
Loading…
Add table
Add a link
Reference in a new issue