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+# vim:filetype=mips
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+
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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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+
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+# (c) Copyright 2007, Grazvydas "notaz" Ignotas
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+# All Rights Reserved
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+
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+
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+.set noreorder
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+.set noat
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+
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+.text
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+.align 4
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+
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+# default jump tables
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+
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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 - for all those large ROM hacks
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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_read8_rom10 # 0x800000 - 0x87FFFF
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+ .long m_read8_rom11 # 0x880000 - 0x8FFFFF
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+ .long m_read8_rom12 # 0x900000 - 0x97FFFF
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+ .long m_read8_rom13 # 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_read8_vdp # 0xD00000 - 0xD7FFFF
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+ .long m_read8_vdp # 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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+
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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_read16_rom10 # 0x800000 - 0x87FFFF
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+ .long m_read16_rom11 # 0x880000 - 0x8FFFFF
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+ .long m_read16_rom12 # 0x900000 - 0x97FFFF
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+ .long m_read16_rom13 # 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_read16_vdp # 0xC80000 - 0xCFFFFF
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+ .long m_read16_vdp # 0xD00000 - 0xD7FFFF
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+ .long m_read16_vdp # 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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+
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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_read32_rom10 # 0x800000 - 0x87FFFF
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+ .long m_read32_rom11 # 0x880000 - 0x8FFFFF
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+ .long m_read32_rom12 # 0x900000 - 0x97FFFF
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+ .long m_read32_rom13 # 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_read32_vdp # 0xC80000 - 0xCFFFFF
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+ .long m_read32_vdp # 0xD00000 - 0xD7FFFF
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+ .long m_read32_vdp # 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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+
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+# #############################################################################
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+
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+.bss
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+.align 4
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+
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+# used tables
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+m_read8_table:
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+ .skip 32*4
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+
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+m_read16_table:
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+ .skip 32*4
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+
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+m_read32_table:
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+ .skip 32*4
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+
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+
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+# #############################################################################
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+
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+.text
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+.align 4
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+
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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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+
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+.global m_read8_def_table
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+.global m_read8_table
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+
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+.macro PicoMemResetCopyDef dst_table src_table
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+ lui $t0, %hi(\dst_table)
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+ addiu $t0, %lo(\dst_table)
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+ lui $t1, %hi(\src_table)
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+ addiu $t1, %lo(\src_table)
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+ li $t2, 32
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+1:
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+ lw $t3, 0($t1)
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+ sw $t3, 0($t0)
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+ addiu $t2, -1
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+ addiu $t1, 4
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+ bnez $t2, 1b
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+ addiu $t0, 4
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+.endm
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+
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+# $t4 = 4
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+.macro PicoMemResetRomArea dst_table ar_label
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+ lui $t0, %hi(\dst_table)
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+ addiu $t0, %lo(\dst_table)
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+ lui $t1, %hi(\ar_label)
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+ addiu $t1, %lo(\ar_label)
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+ li $t2, 20
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+1:
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+ beq $t2, $v1, 2f
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+ addiu $t2, -1
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+ sll $t3, $t2, 2
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+ beq $t2, $t4, 1b # do not touch the SRAM area
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+ addu $t3, $t0
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+ j 1b
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+ sw $t1, 0($t3)
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+2:
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+.endm
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+
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+
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+PicoMemReset:
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+ lui $v1, %hi(Pico+0x22204)
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+ lw $v1, %lo(Pico+0x22204)($v1) # romsize
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+ lui $t0, 8
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+ addu $v1, $t0
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+ addiu $v1, -1
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+ srl $v1, 19
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+
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+ PicoMemResetCopyDef m_read8_table m_read8_def_table
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+ PicoMemResetCopyDef m_read16_table m_read16_def_table
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+ PicoMemResetCopyDef m_read32_table m_read32_def_table
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+
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+ # update memhandlers according to ROM size
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+ li $t4, 4
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+ PicoMemResetRomArea m_read8_table m_read8_above_rom
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+ PicoMemResetRomArea m_read16_table m_read16_above_rom
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+ PicoMemResetRomArea m_read32_table m_read32_above_rom
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+
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+ jr $ra
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+ nop
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+
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+# #############################################################################
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+
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+.macro PicoReadJump table
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+ lui $t0, %hi(\table)
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+ srl $t1, $a0, 19
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+ ins $t0, $t1, 2, 5
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+ lw $t0, %lo(\table)($t0)
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+ ins $a0, $0, 24, 8
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+ jr $t0
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+ nop
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+.endm
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+
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+PicoRead8: # u32 a
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+ PicoReadJump m_read8_table
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+
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+PicoRead16: # u32 a
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+ PicoReadJump m_read16_table
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+
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+PicoRead32: # u32 a
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+ PicoReadJump m_read32_table
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+
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+# #############################################################################
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+
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+m_read_null:
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+ jr $ra
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+ li $v0, 0
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+
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+m_read_neg1:
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+ jr $ra
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+ addiu $v0, $0, 0xffff
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+
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+# loads &Pico.rom to $t3
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+.macro m_read_rom_try_sram is200000 size
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+ lui $t2, %hi(SRam)
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+ addiu $t2, %lo(SRam)
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+ lui $t3, %hi(Pico+0x22200)
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+ lw $t1, 8($t2) # SRam.end
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+.if \is200000
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+ ins $a0, $0, 19, 13
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+ lui $t4, 0x20
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+ or $a0, $t4
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+.endif
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+ subu $t4, $a0, $t1
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+ bgtz $t4, 1f
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+ addiu $t3, %lo(Pico+0x22200)
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+ lw $t1, 4($t2) # SRam.start
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+ subu $t4, $t1, $a0
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+ bgtz $t4, 1f
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+ nop
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+ lb $t1, 0x11($t3) # Pico.m.sram_reg
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+ andi $t4, $t1, 5
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+ beqz $t4, 1f
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+ nop
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+.if \size == 8
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+ j SRAMRead
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+ nop
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+.elseif \size == 16
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+ addiu $sp, -4
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+ jal SRAMRead
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+ sw $ra, 0($sp)
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+ lw $ra, 0($sp)
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+ addiu $sp, 4
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+ jr $ra
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+ ins $v0, $v0, 8, 8
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+.else
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+ addiu $sp, -8
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+ sw $a0, 4($sp)
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+ jal SRAMRead
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+ sw $ra, 0($sp)
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+ lw $a0, 4($sp)
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+ sw $v0, 4($sp)
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+ jal SRAMRead
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+ addiu $a0, 2
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+ lw $v1, 4($sp)
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+ lw $ra, 0($sp)
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+ addiu $sp, 8
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+ ins $v0, $v1, 16, 16
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+ sll $t0, $v0, 8
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+ jr $ra
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+ or $v0, $t0
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+.endif
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+# m_read_nosram:
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+1:
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+.endm
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+
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+.macro m_read8_rom sect
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+ lui $t0, %hi(Pico+0x22200)
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+ lw $t0, %lo(Pico+0x22200)($t0) # rom
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+ xori $a0, 1
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+ ins $a0, $0, 19, 13
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+.if \sect
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+ lui $t1, 8*\sect
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+ addu $a0, $t1
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+.endif
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+ addu $t0, $a0
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+ jr $ra
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+ lb $v0, 0($t0)
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+.endm
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+
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+
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+m_read8_rom0: # 0x000000 - 0x07ffff
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+ m_read8_rom 0
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+
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+m_read8_rom1: # 0x080000 - 0x0fffff
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+ m_read8_rom 1
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+
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+m_read8_rom2: # 0x100000 - 0x17ffff
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+ m_read8_rom 2
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+
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+m_read8_rom3: # 0x180000 - 0x1fffff
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+ m_read8_rom 3
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+
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+m_read8_rom4: # 0x200000 - 0x27ffff, SRAM area
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+ m_read_rom_try_sram 1 8
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+ lw $t1, 4($t3) # romsize
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+ subu $t4, $t1, $a0
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+ blez $t4, m_read_null
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+ lw $t1, 0($t3) # rom
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+ xori $a0, 1
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+ addu $t1, $a0
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+ jr $ra
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+ lb $v0, 0($t1)
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+
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+m_read8_rom5: # 0x280000 - 0x2fffff
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+ m_read8_rom 5
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+
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+m_read8_rom6: # 0x300000 - 0x37ffff
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+ m_read8_rom 6
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+
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+m_read8_rom7: # 0x380000 - 0x3fffff
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+ m_read8_rom 7
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+
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+m_read8_rom8: # 0x400000 - 0x47ffff
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+ m_read8_rom 8
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+
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+m_read8_rom9: # 0x480000 - 0x4fffff
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+ m_read8_rom 9
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+
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+m_read8_romA: # 0x500000 - 0x57ffff
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+ m_read8_rom 0xA
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+
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+m_read8_romB: # 0x580000 - 0x5fffff
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+ m_read8_rom 0xB
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+
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+m_read8_romC: # 0x600000 - 0x67ffff
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+ m_read8_rom 0xC
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+
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+m_read8_romD: # 0x680000 - 0x6fffff
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+ m_read8_rom 0xD
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+
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+m_read8_romE: # 0x700000 - 0x77ffff
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+ m_read8_rom 0xE
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+
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+m_read8_romF: # 0x780000 - 0x7fffff
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+ m_read8_rom 0xF
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+
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+m_read8_rom10: # 0x800000 - 0x87ffff
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+ m_read8_rom 0x10
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+
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+m_read8_rom11: # 0x880000 - 0x8fffff
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+ 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
|
|
|
+
|
|
|
+ lui $t0, %hi(PicoOpt)
|
|
|
+ lw $t0, %lo(PicoOpt)($t0)
|
|
|
+ andi $t0, 1
|
|
|
+ beqz $t0, m_read8_fake_ym2612
|
|
|
+ lui $t0, %hi(Pico+0x22208)
|
|
|
+ j YM2612Read_
|
|
|
+ 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
|
|
|
+ andi $t0, $a0, 1
|
|
|
+ beqz $t0, 1f
|
|
|
+ li $a1, 8 # not always needed, but shouln't cause problems
|
|
|
+ j \funcname # odd address
|
|
|
+ nop
|
|
|
+1:
|
|
|
+ addiu $sp, -4
|
|
|
+ sw $ra, 0($sp)
|
|
|
+ jal \funcname
|
|
|
+ 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
|
|
|
+ m_read8_call16 PicoVideoRead
|
|
|
+
|
|
|
+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 OtherRead16End
|
|
|
+
|
|
|
+# #############################################################################
|
|
|
+
|
|
|
+.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
|
|
|
+ j OtherRead16End
|
|
|
+ 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
|
|
|
+ m_read32_call16 OtherRead16End
|
|
|
+
|
|
|
+# #############################################################################
|
|
|
+
|
|
|
+.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
|
|
|
+
|