3 # memory handlers with banking support for SSF II - The New Challengers
4 # mostly based on Gens code
6 # (c) Copyright 2007, Grazvydas "notaz" Ignotas
19 .long m_read8_rom0 # 0x000000 - 0x07FFFF
20 .long m_read8_rom1 # 0x080000 - 0x0FFFFF
21 .long m_read8_rom2 # 0x100000 - 0x17FFFF
22 .long m_read8_rom3 # 0x180000 - 0x1FFFFF
23 .long m_read8_rom4 # 0x200000 - 0x27FFFF
24 .long m_read8_rom5 # 0x280000 - 0x2FFFFF
25 .long m_read8_rom6 # 0x300000 - 0x37FFFF
26 .long m_read8_rom7 # 0x380000 - 0x3FFFFF
27 .long m_read8_rom8 # 0x400000 - 0x47FFFF - for all those large ROM hacks
28 .long m_read8_rom9 # 0x480000 - 0x4FFFFF
29 .long m_read8_romA # 0x500000 - 0x57FFFF
30 .long m_read8_romB # 0x580000 - 0x5FFFFF
31 .long m_read8_romC # 0x600000 - 0x67FFFF
32 .long m_read8_romD # 0x680000 - 0x6FFFFF
33 .long m_read8_romE # 0x700000 - 0x77FFFF
34 .long m_read8_romF # 0x780000 - 0x7FFFFF
35 .long m_read8_rom10 # 0x800000 - 0x87FFFF
36 .long m_read8_rom11 # 0x880000 - 0x8FFFFF
37 .long m_read8_rom12 # 0x900000 - 0x97FFFF
38 .long m_read8_rom13 # 0x980000 - 0x9FFFFF
39 .long m_read8_misc # 0xA00000 - 0xA7FFFF
40 .long m_read_null # 0xA80000 - 0xAFFFFF
41 .long m_read_null # 0xB00000 - 0xB7FFFF
42 .long m_read_null # 0xB80000 - 0xBFFFFF
43 .long m_read8_vdp # 0xC00000 - 0xC7FFFF
44 .long m_read8_vdp # 0xC80000 - 0xCFFFFF
45 .long m_read8_vdp # 0xD00000 - 0xD7FFFF
46 .long m_read8_vdp # 0xD80000 - 0xDFFFFF
47 .long m_read8_ram # 0xE00000 - 0xE7FFFF
48 .long m_read8_ram # 0xE80000 - 0xEFFFFF
49 .long m_read8_ram # 0xF00000 - 0xF7FFFF
50 .long m_read8_ram # 0xF80000 - 0xFFFFFF
53 .long m_read16_rom0 # 0x000000 - 0x07FFFF
54 .long m_read16_rom1 # 0x080000 - 0x0FFFFF
55 .long m_read16_rom2 # 0x100000 - 0x17FFFF
56 .long m_read16_rom3 # 0x180000 - 0x1FFFFF
57 .long m_read16_rom4 # 0x200000 - 0x27FFFF
58 .long m_read16_rom5 # 0x280000 - 0x2FFFFF
59 .long m_read16_rom6 # 0x300000 - 0x37FFFF
60 .long m_read16_rom7 # 0x380000 - 0x3FFFFF
61 .long m_read16_rom8 # 0x400000 - 0x47FFFF
62 .long m_read16_rom9 # 0x480000 - 0x4FFFFF
63 .long m_read16_romA # 0x500000 - 0x57FFFF
64 .long m_read16_romB # 0x580000 - 0x5FFFFF
65 .long m_read16_romC # 0x600000 - 0x67FFFF
66 .long m_read16_romD # 0x680000 - 0x6FFFFF
67 .long m_read16_romE # 0x700000 - 0x77FFFF
68 .long m_read16_romF # 0x780000 - 0x7FFFFF
69 .long m_read16_rom10 # 0x800000 - 0x87FFFF
70 .long m_read16_rom11 # 0x880000 - 0x8FFFFF
71 .long m_read16_rom12 # 0x900000 - 0x97FFFF
72 .long m_read16_rom13 # 0x980000 - 0x9FFFFF
73 .long m_read16_misc # 0xA00000 - 0xA7FFFF
74 .long m_read_null # 0xA80000 - 0xAFFFFF
75 .long m_read_null # 0xB00000 - 0xB7FFFF
76 .long m_read_null # 0xB80000 - 0xBFFFFF
77 .long m_read16_vdp # 0xC00000 - 0xC7FFFF
78 .long m_read16_vdp # 0xC80000 - 0xCFFFFF
79 .long m_read16_vdp # 0xD00000 - 0xD7FFFF
80 .long m_read16_vdp # 0xD80000 - 0xDFFFFF
81 .long m_read16_ram # 0xE00000 - 0xE7FFFF
82 .long m_read16_ram # 0xE80000 - 0xEFFFFF
83 .long m_read16_ram # 0xF00000 - 0xF7FFFF
84 .long m_read16_ram # 0xF80000 - 0xFFFFFF
87 .long m_read32_rom0 # 0x000000 - 0x07FFFF
88 .long m_read32_rom1 # 0x080000 - 0x0FFFFF
89 .long m_read32_rom2 # 0x100000 - 0x17FFFF
90 .long m_read32_rom3 # 0x180000 - 0x1FFFFF
91 .long m_read32_rom4 # 0x200000 - 0x27FFFF
92 .long m_read32_rom5 # 0x280000 - 0x2FFFFF
93 .long m_read32_rom6 # 0x300000 - 0x37FFFF
94 .long m_read32_rom7 # 0x380000 - 0x3FFFFF
95 .long m_read32_rom8 # 0x400000 - 0x47FFFF
96 .long m_read32_rom9 # 0x480000 - 0x4FFFFF
97 .long m_read32_romA # 0x500000 - 0x57FFFF
98 .long m_read32_romB # 0x580000 - 0x5FFFFF
99 .long m_read32_romC # 0x600000 - 0x67FFFF
100 .long m_read32_romD # 0x680000 - 0x6FFFFF
101 .long m_read32_romE # 0x700000 - 0x77FFFF
102 .long m_read32_romF # 0x780000 - 0x7FFFFF
103 .long m_read32_rom10 # 0x800000 - 0x87FFFF
104 .long m_read32_rom11 # 0x880000 - 0x8FFFFF
105 .long m_read32_rom12 # 0x900000 - 0x97FFFF
106 .long m_read32_rom13 # 0x980000 - 0x9FFFFF
107 .long m_read32_misc # 0xA00000 - 0xA7FFFF
108 .long m_read_null # 0xA80000 - 0xAFFFFF
109 .long m_read_null # 0xB00000 - 0xB7FFFF
110 .long m_read_null # 0xB80000 - 0xBFFFFF
111 .long m_read32_vdp # 0xC00000 - 0xC7FFFF
112 .long m_read32_vdp # 0xC80000 - 0xCFFFFF
113 .long m_read32_vdp # 0xD00000 - 0xD7FFFF
114 .long m_read32_vdp # 0xD80000 - 0xDFFFFF
115 .long m_read32_ram # 0xE00000 - 0xE7FFFF
116 .long m_read32_ram # 0xE80000 - 0xEFFFFF
117 .long m_read32_ram # 0xF00000 - 0xF7FFFF
118 .long m_read32_ram # 0xF80000 - 0xFFFFFF
121 # #############################################################################
137 # #############################################################################
146 .global PicoWriteRomHW_SSF2
148 .global m_read8_def_table
149 .global m_read8_table
151 .macro PicoMemResetCopyDef dst_table src_table
152 lui $t0, %hi(\dst_table)
153 addiu $t0, %lo(\dst_table)
154 lui $t1, %hi(\src_table)
155 addiu $t1, %lo(\src_table)
167 .macro PicoMemResetRomArea dst_table ar_label
168 lui $t0, %hi(\dst_table)
169 addiu $t0, %lo(\dst_table)
170 lui $t1, %hi(\ar_label)
171 addiu $t1, %lo(\ar_label)
177 beq $t2, $t4, 1b # do not touch the SRAM area
186 lui $v1, %hi(Pico+0x22204)
187 lw $v1, %lo(Pico+0x22204)($v1) # romsize
193 PicoMemResetCopyDef m_read8_table m_read8_def_table
194 PicoMemResetCopyDef m_read16_table m_read16_def_table
195 PicoMemResetCopyDef m_read32_table m_read32_def_table
197 # update memhandlers according to ROM size
199 PicoMemResetRomArea m_read8_table m_read8_above_rom
200 PicoMemResetRomArea m_read16_table m_read16_above_rom
201 PicoMemResetRomArea m_read32_table m_read32_above_rom
206 # #############################################################################
208 .macro PicoReadJump table
212 lw $t0, %lo(\table)($t0)
219 PicoReadJump m_read8_table
222 PicoReadJump m_read16_table
225 PicoReadJump m_read32_table
227 # #############################################################################
235 addiu $v0, $0, 0xffff
237 # loads &Pico.rom to $t3
238 .macro m_read_rom_try_sram is200000 size
241 lui $t3, %hi(Pico+0x22200)
242 lw $t1, 8($t2) # SRam.end
250 addiu $t3, %lo(Pico+0x22200)
251 lw $t1, 4($t2) # SRam.start
255 lb $t1, 0x11($t3) # Pico.m.sram_reg
291 .macro m_read8_rom sect
292 lui $t0, %hi(Pico+0x22200)
293 lw $t0, %lo(Pico+0x22200)($t0) # rom
306 m_read8_rom0: # 0x000000 - 0x07ffff
309 m_read8_rom1: # 0x080000 - 0x0fffff
312 m_read8_rom2: # 0x100000 - 0x17ffff
315 m_read8_rom3: # 0x180000 - 0x1fffff
318 m_read8_rom4: # 0x200000 - 0x27ffff, SRAM area
319 m_read_rom_try_sram 1 8
320 lw $t1, 4($t3) # romsize
322 blez $t4, m_read_null
329 m_read8_rom5: # 0x280000 - 0x2fffff
332 m_read8_rom6: # 0x300000 - 0x37ffff
335 m_read8_rom7: # 0x380000 - 0x3fffff
338 m_read8_rom8: # 0x400000 - 0x47ffff
341 m_read8_rom9: # 0x480000 - 0x4fffff
344 m_read8_romA: # 0x500000 - 0x57ffff
347 m_read8_romB: # 0x580000 - 0x5fffff
350 m_read8_romC: # 0x600000 - 0x67ffff
353 m_read8_romD: # 0x680000 - 0x6fffff
356 m_read8_romE: # 0x700000 - 0x77ffff
359 m_read8_romF: # 0x780000 - 0x7fffff
362 m_read8_rom10: # 0x800000 - 0x87ffff
365 m_read8_rom11: # 0x880000 - 0x8fffff
368 m_read8_rom12: # 0x900000 - 0x97ffff
371 m_read8_rom13: # 0x980000 - 0x9fffff
379 bne $t0, $t1, m_read8_misc2
382 beqz $t0, m_read8_misc_hwreg
384 bgtz $t1, m_read8_misc_ioports
392 lui $v0, %hi(Pico+0x2220f)
394 lb $v0, %lo(Pico+0x2220f)($v0)
396 m_read8_misc_ioports:
397 lui $v0, %hi(Pico+0x22000)
400 lb $v0, %lo(Pico+0x22000)($v0)
405 bne $a0, $t0, m_read8_misc3
410 addiu $t0, 0xff60 # expecting 0xa0 to get 0
411 bnez $t0, m_read8_misc4
414 andi $t0, $a0, 0x4000
415 bnez $t0, m_read8_z80_misc
416 andi $t0, $a0, 0x6000
420 addiu $t0, 0xc000 # expecting 0x4000 to get 0
421 bnez $t0, m_read_neg1 # invalid
423 lui $t0, %hi(PicoOpt)
424 lw $t0, %lo(PicoOpt)($t0)
426 beqz $t0, m_read8_fake_ym2612
427 lui $t0, %hi(Pico+0x22208)
432 lb $v0, %lo(Pico+0x22208)($t0) # Pico.m.rotate
435 sb $t1, %lo(Pico+0x22208)($t0)
437 # delay slot friendly
438 .macro m_read8_call16 funcname
441 li $a1, 8 # not always needed, but shouln't cause problems
442 j \funcname # odd address
456 # if everything else fails, use generic handler
457 m_read8_call16 OtherRead16
463 bnez $t0, m_read_null # invalid address
464 m_read8_call16 PicoVideoRead
471 lb $v0, %lo(Pico)($t0)
474 # might still be SRam (Micro Machines, HardBall '95)
475 m_read_rom_try_sram 0 8
476 m_read8_call16 OtherRead16End
478 # #############################################################################
480 .macro m_read16_rom sect
481 lui $t0, %hi(Pico+0x22200)
482 lw $t0, %lo(Pico+0x22200)($t0) # rom
495 m_read16_rom0: # 0x000000 - 0x07ffff
498 m_read16_rom1: # 0x080000 - 0x0fffff
501 m_read16_rom2: # 0x100000 - 0x17ffff
504 m_read16_rom3: # 0x180000 - 0x1fffff
507 m_read16_rom4: # 0x200000 - 0x27ffff, SRAM area
508 m_read_rom_try_sram 1 16
509 lw $t1, 4($t3) # romsize
511 blez $t4, m_read_null
518 m_read16_rom5: # 0x280000 - 0x2fffff
521 m_read16_rom6: # 0x300000 - 0x37ffff
524 m_read16_rom7: # 0x380000 - 0x3fffff
527 m_read16_rom8: # 0x400000 - 0x47ffff
530 m_read16_rom9: # 0x480000 - 0x4fffff
533 m_read16_romA: # 0x500000 - 0x57ffff
536 m_read16_romB: # 0x580000 - 0x5fffff
539 m_read16_romC: # 0x600000 - 0x67ffff
542 m_read16_romD: # 0x680000 - 0x6fffff
545 m_read16_romE: # 0x700000 - 0x77ffff
548 m_read16_romF: # 0x780000 - 0x7fffff
551 m_read16_rom10: # 0x800000 - 0x87ffff
554 m_read16_rom11: # 0x880000 - 0x8fffff
557 m_read16_rom12: # 0x900000 - 0x97ffff
560 m_read16_rom13: # 0x980000 - 0x9fffff
572 bnez $t0, m_read_null # invalid address
582 lh $v0, %lo(Pico)($t0)
585 # might still be SRam
586 m_read_rom_try_sram 0 16
590 # #############################################################################
592 .macro m_read32_rom sect
593 lui $t0, %hi(Pico+0x22200)
594 lw $t0, %lo(Pico+0x22200)($t0) # rom
609 m_read32_rom0: # 0x000000 - 0x07ffff
612 m_read32_rom1: # 0x080000 - 0x0fffff
615 m_read32_rom2: # 0x100000 - 0x17ffff
618 m_read32_rom3: # 0x180000 - 0x1fffff
621 m_read32_rom4: # 0x200000 - 0x27ffff, SRAM area
622 m_read_rom_try_sram 1 32
623 lw $t1, 4($t3) # romsize
625 blez $t4, m_read_null
634 m_read32_rom5: # 0x280000 - 0x2fffff
637 m_read32_rom6: # 0x300000 - 0x37ffff
640 m_read32_rom7: # 0x380000 - 0x3fffff
643 m_read32_rom8: # 0x400000 - 0x47ffff
646 m_read32_rom9: # 0x480000 - 0x4fffff
649 m_read32_romA: # 0x500000 - 0x57ffff
652 m_read32_romB: # 0x580000 - 0x5fffff
655 m_read32_romC: # 0x600000 - 0x67ffff
658 m_read32_romD: # 0x680000 - 0x6fffff
661 m_read32_romE: # 0x700000 - 0x77ffff
664 m_read32_romF: # 0x780000 - 0x7fffff
667 m_read32_rom10: # 0x800000 - 0x87ffff
670 m_read32_rom11: # 0x880000 - 0x8fffff
673 m_read32_rom12: # 0x900000 - 0x97ffff
676 m_read32_rom13: # 0x980000 - 0x9fffff
679 .macro m_read32_call16 func need_a1=0
705 m_read32_call16 OtherRead16, 1
711 bnez $t0, m_read_null # invalid address
713 m_read32_call16 PicoVideoRead
719 lh $v1, %lo(Pico)($t0)
720 lh $v0, %lo(Pico+2)($t0)
725 # might still be SRam
726 m_read_rom_try_sram 0 32
728 m_read32_call16 OtherRead16End
730 # #############################################################################
732 .macro PicoWriteRomHW_SSF2_ls def_table table
733 lui $t3, %hi(\def_table)
735 lw $t0, %lo(\def_table)($t3)
738 sw $t0, %lo(\table)($t2)
741 PicoWriteRomHW_SSF2: # u32 a, u32 d
743 bnez $a0, pwr_banking
746 lui $t0, %hi(Pico+0x22211)
747 lb $t1, %lo(Pico+0x22211)($t0) # Pico.m.sram_reg
750 sb $t1, %lo(Pico+0x22211)($t0)
755 PicoWriteRomHW_SSF2_ls m_read8_def_table m_read8_table
756 PicoWriteRomHW_SSF2_ls m_read16_def_table m_read16_table
757 PicoWriteRomHW_SSF2_ls m_read32_def_table m_read32_table