+++ /dev/null
-#*
-#* memory handlers with banking support
-#* (C) notaz, 2007-2008
-#*
-#* This work is licensed under the terms of MAME license.
-#* See COPYING file in the top-level directory.
-#*
-
-# OUT OF DATE
-
-.set noreorder
-.set noat
-
-.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
-
-# 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 PicoWriteRomHW_SSF2
-
-.global m_read8_def_table
-.global m_read8_table
-
-.macro PicoMemResetCopyDef dst_table src_table
- lui $t0, %hi(\dst_table)
- addiu $t0, %lo(\dst_table)
- lui $t1, %hi(\src_table)
- addiu $t1, %lo(\src_table)
- li $t2, 32
-1:
- lw $t3, 0($t1)
- sw $t3, 0($t0)
- addiu $t2, -1
- addiu $t1, 4
- bnez $t2, 1b
- addiu $t0, 4
-.endm
-
-# $t4 = 4
-.macro PicoMemResetRomArea dst_table ar_label
- lui $t0, %hi(\dst_table)
- addiu $t0, %lo(\dst_table)
- lui $t1, %hi(\ar_label)
- addiu $t1, %lo(\ar_label)
- li $t2, 20
-1:
- beq $t2, $v1, 2f
- addiu $t2, -1
- sll $t3, $t2, 2
- beq $t2, $t4, 1b # do not touch the SRAM area
- addu $t3, $t0
- j 1b
- sw $t1, 0($t3)
-2:
-.endm
-
-
-PicoMemReset:
- lui $v1, %hi(Pico+0x22204)
- lw $v1, %lo(Pico+0x22204)($v1) # romsize
- lui $t0, 8
- addu $v1, $t0
- addiu $v1, -1
- srl $v1, 19
-
- PicoMemResetCopyDef m_read8_table m_read8_def_table
- PicoMemResetCopyDef m_read16_table m_read16_def_table
- PicoMemResetCopyDef m_read32_table m_read32_def_table
-
- # update memhandlers according to ROM size
- li $t4, 4
- PicoMemResetRomArea m_read8_table m_read8_above_rom
- PicoMemResetRomArea m_read16_table m_read16_above_rom
- PicoMemResetRomArea m_read32_table m_read32_above_rom
-
- jr $ra
- nop
-
-# #############################################################################
-
-.macro PicoReadJump table
- lui $t0, %hi(\table)
- srl $t1, $a0, 19
- ins $t0, $t1, 2, 5
- lw $t0, %lo(\table)($t0)
- ins $a0, $0, 24, 8
- jr $t0
- nop
-.endm
-
-PicoRead8: # u32 a
- PicoReadJump m_read8_table
-
-PicoRead16: # u32 a
- PicoReadJump m_read16_table
-
-PicoRead32: # u32 a
- PicoReadJump m_read32_table
-
-# #############################################################################
-
-m_read_null:
- jr $ra
- li $v0, 0
-
-m_read_neg1:
- jr $ra
- addiu $v0, $0, 0xffff
-
-# loads &Pico.rom to $t3
-.macro m_read_rom_try_sram is200000 size
- lui $t2, %hi(SRam)
- addiu $t2, %lo(SRam)
- lui $t3, %hi(Pico+0x22200)
- lw $t1, 8($t2) # SRam.end
-.if \is200000
- ins $a0, $0, 19, 13
- lui $t4, 0x20
- or $a0, $t4
-.endif
- subu $t4, $a0, $t1
- bgtz $t4, 1f
- addiu $t3, %lo(Pico+0x22200)
- lw $t1, 4($t2) # SRam.start
- subu $t4, $t1, $a0
- bgtz $t4, 1f
- nop
- lb $t1, 0x11($t3) # Pico.m.sram_reg
- andi $t4, $t1, 5
- beqz $t4, 1f
- nop
-.if \size == 8
- j SRAMRead
- nop
-.elseif \size == 16
- sw $ra, -4($sp)
- jal SRAMRead16
- addiu $sp, -4
- lw $ra, 0($sp)
- jr $ra
- addiu $sp, 4
-.else
- addiu $sp, -8
- sw $ra, 0($sp)
- sw $a0, 4($sp)
- jal SRAMRead16
- nop
- lw $a0, 4($sp)
- sw $v0, 4($sp)
- jal SRAMRead16
- addiu $a0, 2
- lw $v1, 4($sp)
- lw $ra, 0($sp)
- addiu $sp, 8
- jr $ra
- ins $v0, $v1, 16, 16
-.endif
-# m_read_nosram:
-1:
-.endm
-
-.macro m_read8_rom sect
- lui $t0, %hi(Pico+0x22200)
- lw $t0, %lo(Pico+0x22200)($t0) # rom
- xori $a0, 1
- ins $a0, $0, 19, 13
-.if \sect
- lui $t1, 8*\sect
- addu $a0, $t1
-.endif
- addu $t0, $a0
- jr $ra
- lb $v0, 0($t0)
-.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
- m_read_rom_try_sram 1 8
- lw $t1, 4($t3) # romsize
- subu $t4, $t1, $a0
- blez $t4, m_read_null
- lw $t1, 0($t3) # rom
- xori $a0, 1
- addu $t1, $a0
- jr $ra
- lb $v0, 0($t1)
-
-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_read8_misc:
- srl $t0, $a0, 5
- sll $t0, $t0, 5
- lui $t1, 0xa1
- bne $t0, $t1, m_read8_misc2
- andi $t0, $a0, 0x1e
-m_read8_misc_io:
- beqz $t0, m_read8_misc_hwreg
- sub $t1, $t0, 4
- bgtz $t1, m_read8_misc_ioports
- nop
- slti $a0, $t0, 4
- xori $a0, 1
- j PadRead
- nop
-
-m_read8_misc_hwreg:
- lui $v0, %hi(Pico+0x2220f)
- jr $ra
- lb $v0, %lo(Pico+0x2220f)($v0)
-
-m_read8_misc_ioports:
- lui $v0, %hi(Pico+0x22000)
- ins $v0, $t0, 0, 5
- jr $ra
- lb $v0, %lo(Pico+0x22000)($v0)
-
-m_read8_misc2:
- lui $t0, 0xa1
- ori $t0, 0x1100
- bne $a0, $t0, m_read8_misc3
- srl $t0, $a0, 16
- j z80ReadBusReq
-
-m_read8_misc3:
- addiu $t0, 0xff60 # expecting 0xa0 to get 0
- bnez $t0, m_read8_misc4
-
- # z80 area
- andi $t0, $a0, 0x4000
- bnez $t0, m_read8_z80_misc
- andi $t0, $a0, 0x6000
- j z80Read8 # z80 RAM
-
-m_read8_z80_misc:
- addiu $t0, 0xc000 # expecting 0x4000 to get 0
- bnez $t0, m_read_neg1 # invalid
- nop
- j ym2612_read_local_68k
- nop
-
-m_read8_fake_ym2612:
- lb $v0, %lo(Pico+0x22208)($t0) # Pico.m.rotate
- addiu $t1, $v0, 1
- jr $ra
- sb $t1, %lo(Pico+0x22208)($t0)
-
-# delay slot friendly
-.macro m_read8_call16 funcname is_func_ptr=0
-.if \is_func_ptr
- lui $t1, %hi(\funcname)
- lw $t1, %lo(\funcname)($t1)
-.endif
- andi $t0, $a0, 1
- beqz $t0, 1f
- li $a1, 8 # not always needed, but shouln't cause problems
-.if \is_func_ptr
- jr $t1
-.else
- j \funcname # odd address
-.endif
- nop
-1:
- addiu $sp, -4
- sw $ra, 0($sp)
-.if \is_func_ptr
- jalr $t1
-.else
- jal \funcname
-.endif
- xori $a0, 1
- lw $ra, 0($sp)
- addiu $sp, 4
- jr $ra
- srl $v0, 8
-.endm
-
-m_read8_misc4:
- # if everything else fails, use generic handler
- m_read8_call16 OtherRead16
-
-m_read8_vdp:
- ext $t0, $a0, 16, 3
- andi $t1, $a0, 0xe0
- or $t0, $t1
- bnez $t0, m_read_null # invalid address
- nop
- j PicoRead8_vdp
- nop
-
-m_read8_ram:
- lui $t0, %hi(Pico)
- ins $t0, $a0, 0, 16
- xori $t0, 1
- jr $ra
- lb $v0, %lo(Pico)($t0)
-
-m_read8_above_rom:
- # might still be SRam (Micro Machines, HardBall '95)
- m_read_rom_try_sram 0 8
- m_read8_call16 PicoRead16Hook 1
-
-# #############################################################################
-
-.macro m_read16_rom sect
- lui $t0, %hi(Pico+0x22200)
- lw $t0, %lo(Pico+0x22200)($t0) # rom
- ins $a0, $0, 0, 1
- ins $a0, $0, 19, 13
-.if \sect
- lui $t1, 8*\sect
- addu $a0, $t1
-.endif
- addu $t0, $a0
- jr $ra
- lh $v0, 0($t0)
-.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
- m_read_rom_try_sram 1 16
- lw $t1, 4($t3) # romsize
- subu $t4, $t1, $a0
- blez $t4, m_read_null
- lw $t1, 0($t3) # rom
- ins $a0, $0, 0, 1
- addu $t1, $a0
- jr $ra
- lh $v0, 0($t1)
-
-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:
- ins $a0, $0, 0, 1
- j OtherRead16
- li $a1, 16
-
-m_read16_vdp:
- ext $t0, $a0, 16, 3
- andi $t1, $a0, 0xe0
- or $t0, $t1
- bnez $t0, m_read_null # invalid address
- ins $a0, $0, 0, 1
- j PicoVideoRead
- nop
-
-m_read16_ram:
- lui $t0, %hi(Pico)
- ins $a0, $0, 0, 1
- ins $t0, $a0, 0, 16
- jr $ra
- lh $v0, %lo(Pico)($t0)
-
-m_read16_above_rom:
- # might still be SRam
- m_read_rom_try_sram 0 16
- lui $t1, %hi(PicoRead16Hook)
- lw $t1, %lo(PicoRead16Hook)($t1)
- jr $t1
- ins $a0, $0, 0, 1
-
-# #############################################################################
-
-.macro m_read32_rom sect
- lui $t0, %hi(Pico+0x22200)
- lw $t0, %lo(Pico+0x22200)($t0) # rom
- ins $a0, $0, 0, 1
- ins $a0, $0, 19, 13
-.if \sect
- lui $t1, 8*\sect
- addu $a0, $t1
-.endif
- addu $t0, $a0
- lh $v1, 0($t0)
- lh $v0, 2($t0)
- jr $ra
- ins $v0, $v1, 16, 16
-.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
- m_read_rom_try_sram 1 32
- lw $t1, 4($t3) # romsize
- subu $t4, $t1, $a0
- blez $t4, m_read_null
- lw $t1, 0($t3) # rom
- ins $a0, $0, 0, 1
- addu $t1, $a0
- lh $v1, 0($t1)
- lh $v0, 2($t1)
- jr $ra
- ins $v0, $v1, 16, 16
-
-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
-
-.macro m_read32_call16 func need_a1=0
- addiu $sp, -8
- sw $ra, 0($sp)
- sw $s0, 4($sp)
-.if \need_a1
- li $a1, 16
-.endif
- jal \func
- move $s0, $a0
-
- addu $a0, $s0, 2
-.if \need_a1
- li $a1, 16
-.endif
- jal \func
- move $s0, $v0
-
- ins $v0, $s0, 16, 16
- lw $ra, 0($sp)
- lw $s0, 4($sp)
- jr $ra
- addiu $sp, 8
-.endm
-
-m_read32_misc:
- ins $a0, $0, 0, 1
- m_read32_call16 OtherRead16, 1
-
-m_read32_vdp:
- ext $t0, $a0, 16, 3
- andi $t1, $a0, 0xe0
- or $t0, $t1
- bnez $t0, m_read_null # invalid address
- ins $a0, $0, 0, 1
- m_read32_call16 PicoVideoRead
-
-m_read32_ram:
- lui $t0, %hi(Pico)
- ins $a0, $0, 0, 1
- ins $t0, $a0, 0, 16
- lh $v1, %lo(Pico)($t0)
- lh $v0, %lo(Pico+2)($t0)
- jr $ra
- ins $v0, $v1, 16, 16
-
-m_read32_above_rom:
- # might still be SRam
- m_read_rom_try_sram 0 32
- ins $a0, $0, 0, 1
- lui $t1, %hi(PicoRead16Hook)
- lw $t1, %lo(PicoRead16Hook)($t1)
- addiu $sp, -4*3
- sw $ra, 0($sp)
- sw $s0, 4($sp)
- sw $t1, 8($sp)
- jalr $t1
- move $s0, $a0
-
- lw $t1, 8($sp)
- addu $a0, $s0, 2
- jalr $t1
- move $s0, $v0
-
- ins $v0, $s0, 16, 16
- lw $ra, 0($sp)
- lw $s0, 4($sp)
- jr $ra
- addiu $sp, 4*3
-
-# #############################################################################
-
-.macro PicoWriteRomHW_SSF2_ls def_table table
- lui $t3, %hi(\def_table)
- ins $t3, $a1, 2, 5
- lw $t0, %lo(\def_table)($t3)
- lui $t2, %hi(\table)
- ins $t2, $a0, 2, 3
- sw $t0, %lo(\table)($t2)
-.endm
-
-PicoWriteRomHW_SSF2: # u32 a, u32 d
- ext $a0, $a0, 1, 3
- bnez $a0, pwr_banking
-
- # sram register
- lui $t0, %hi(Pico+0x22211)
- lb $t1, %lo(Pico+0x22211)($t0) # Pico.m.sram_reg
- ins $t1, $a1, 0, 2
- jr $ra
- sb $t1, %lo(Pico+0x22211)($t0)
-
-pwr_banking:
- andi $a1, 0x1f
-
- PicoWriteRomHW_SSF2_ls m_read8_def_table m_read8_table
- PicoWriteRomHW_SSF2_ls m_read16_def_table m_read16_table
- PicoWriteRomHW_SSF2_ls m_read32_def_table m_read32_table
-
- jr $ra
- nop
-
-# vim:filetype=mips
notaz.gp2x.de / picodrive.git / blobdiff