3ec29f01 |
1 | # vim:filetype=mips |
2 | |
3 | # memory handlers with banking support for SSF II - The New Challengers |
4 | # mostly based on Gens code |
5 | |
6 | # (c) Copyright 2007, Grazvydas "notaz" Ignotas |
7 | # All Rights Reserved |
8 | |
9 | |
10 | .set noreorder |
11 | .set noat |
12 | |
13 | .text |
14 | .align 4 |
15 | |
16 | # default jump tables |
17 | |
18 | m_read8_def_table: |
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 |
51 | |
52 | m_read16_def_table: |
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 |
85 | |
86 | m_read32_def_table: |
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 |
119 | |
120 | |
121 | # ############################################################################# |
122 | |
123 | .bss |
124 | .align 4 |
125 | |
126 | # used tables |
127 | m_read8_table: |
128 | .skip 32*4 |
129 | |
130 | m_read16_table: |
131 | .skip 32*4 |
132 | |
133 | m_read32_table: |
134 | .skip 32*4 |
135 | |
136 | |
137 | # ############################################################################# |
138 | |
139 | .text |
140 | .align 4 |
141 | |
142 | .global PicoMemReset |
143 | .global PicoRead8 |
144 | .global PicoRead16 |
145 | .global PicoRead32 |
146 | .global PicoWriteRomHW_SSF2 |
147 | |
148 | .global m_read8_def_table |
149 | .global m_read8_table |
150 | |
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) |
156 | li $t2, 32 |
157 | 1: |
158 | lw $t3, 0($t1) |
159 | sw $t3, 0($t0) |
160 | addiu $t2, -1 |
161 | addiu $t1, 4 |
162 | bnez $t2, 1b |
163 | addiu $t0, 4 |
164 | .endm |
165 | |
166 | # $t4 = 4 |
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) |
172 | li $t2, 20 |
173 | 1: |
174 | beq $t2, $v1, 2f |
175 | addiu $t2, -1 |
176 | sll $t3, $t2, 2 |
177 | beq $t2, $t4, 1b # do not touch the SRAM area |
178 | addu $t3, $t0 |
179 | j 1b |
180 | sw $t1, 0($t3) |
181 | 2: |
182 | .endm |
183 | |
184 | |
185 | PicoMemReset: |
186 | lui $v1, %hi(Pico+0x22204) |
187 | lw $v1, %lo(Pico+0x22204)($v1) # romsize |
188 | lui $t0, 8 |
189 | addu $v1, $t0 |
190 | addiu $v1, -1 |
191 | srl $v1, 19 |
192 | |
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 |
196 | |
197 | # update memhandlers according to ROM size |
198 | li $t4, 4 |
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 |
202 | |
203 | jr $ra |
204 | nop |
205 | |
206 | # ############################################################################# |
207 | |
208 | .macro PicoReadJump table |
209 | lui $t0, %hi(\table) |
210 | srl $t1, $a0, 19 |
211 | ins $t0, $t1, 2, 5 |
212 | lw $t0, %lo(\table)($t0) |
213 | ins $a0, $0, 24, 8 |
214 | jr $t0 |
215 | nop |
216 | .endm |
217 | |
218 | PicoRead8: # u32 a |
219 | PicoReadJump m_read8_table |
220 | |
221 | PicoRead16: # u32 a |
222 | PicoReadJump m_read16_table |
223 | |
224 | PicoRead32: # u32 a |
225 | PicoReadJump m_read32_table |
226 | |
227 | # ############################################################################# |
228 | |
229 | m_read_null: |
230 | jr $ra |
231 | li $v0, 0 |
232 | |
233 | m_read_neg1: |
234 | jr $ra |
235 | addiu $v0, $0, 0xffff |
236 | |
237 | # loads &Pico.rom to $t3 |
238 | .macro m_read_rom_try_sram is200000 size |
239 | lui $t2, %hi(SRam) |
240 | addiu $t2, %lo(SRam) |
241 | lui $t3, %hi(Pico+0x22200) |
242 | lw $t1, 8($t2) # SRam.end |
243 | .if \is200000 |
244 | ins $a0, $0, 19, 13 |
245 | lui $t4, 0x20 |
246 | or $a0, $t4 |
247 | .endif |
248 | subu $t4, $a0, $t1 |
249 | bgtz $t4, 1f |
250 | addiu $t3, %lo(Pico+0x22200) |
251 | lw $t1, 4($t2) # SRam.start |
252 | subu $t4, $t1, $a0 |
253 | bgtz $t4, 1f |
254 | nop |
255 | lb $t1, 0x11($t3) # Pico.m.sram_reg |
256 | andi $t4, $t1, 5 |
257 | beqz $t4, 1f |
258 | nop |
259 | .if \size == 8 |
260 | j SRAMRead |
261 | nop |
262 | .elseif \size == 16 |
9dc09829 |
263 | sw $ra, -4($sp) |
264 | jal SRAMRead16 |
3ec29f01 |
265 | addiu $sp, -4 |
3ec29f01 |
266 | lw $ra, 0($sp) |
3ec29f01 |
267 | jr $ra |
9dc09829 |
268 | addiu $sp, 4 |
3ec29f01 |
269 | .else |
270 | addiu $sp, -8 |
3ec29f01 |
271 | sw $ra, 0($sp) |
9dc09829 |
272 | sw $a0, 4($sp) |
273 | jal SRAMRead16 |
274 | nop |
3ec29f01 |
275 | lw $a0, 4($sp) |
276 | sw $v0, 4($sp) |
9dc09829 |
277 | jal SRAMRead16 |
3ec29f01 |
278 | addiu $a0, 2 |
279 | lw $v1, 4($sp) |
280 | lw $ra, 0($sp) |
281 | addiu $sp, 8 |
3ec29f01 |
282 | jr $ra |
9dc09829 |
283 | ins $v0, $v1, 16, 16 |
3ec29f01 |
284 | .endif |
285 | # m_read_nosram: |
286 | 1: |
287 | .endm |
288 | |
289 | .macro m_read8_rom sect |
290 | lui $t0, %hi(Pico+0x22200) |
291 | lw $t0, %lo(Pico+0x22200)($t0) # rom |
292 | xori $a0, 1 |
293 | ins $a0, $0, 19, 13 |
294 | .if \sect |
295 | lui $t1, 8*\sect |
296 | addu $a0, $t1 |
297 | .endif |
298 | addu $t0, $a0 |
299 | jr $ra |
300 | lb $v0, 0($t0) |
301 | .endm |
302 | |
303 | |
304 | m_read8_rom0: # 0x000000 - 0x07ffff |
305 | m_read8_rom 0 |
306 | |
307 | m_read8_rom1: # 0x080000 - 0x0fffff |
308 | m_read8_rom 1 |
309 | |
310 | m_read8_rom2: # 0x100000 - 0x17ffff |
311 | m_read8_rom 2 |
312 | |
313 | m_read8_rom3: # 0x180000 - 0x1fffff |
314 | m_read8_rom 3 |
315 | |
316 | m_read8_rom4: # 0x200000 - 0x27ffff, SRAM area |
317 | m_read_rom_try_sram 1 8 |
318 | lw $t1, 4($t3) # romsize |
319 | subu $t4, $t1, $a0 |
320 | blez $t4, m_read_null |
321 | lw $t1, 0($t3) # rom |
322 | xori $a0, 1 |
323 | addu $t1, $a0 |
324 | jr $ra |
325 | lb $v0, 0($t1) |
326 | |
327 | m_read8_rom5: # 0x280000 - 0x2fffff |
328 | m_read8_rom 5 |
329 | |
330 | m_read8_rom6: # 0x300000 - 0x37ffff |
331 | m_read8_rom 6 |
332 | |
333 | m_read8_rom7: # 0x380000 - 0x3fffff |
334 | m_read8_rom 7 |
335 | |
336 | m_read8_rom8: # 0x400000 - 0x47ffff |
337 | m_read8_rom 8 |
338 | |
339 | m_read8_rom9: # 0x480000 - 0x4fffff |
340 | m_read8_rom 9 |
341 | |
342 | m_read8_romA: # 0x500000 - 0x57ffff |
343 | m_read8_rom 0xA |
344 | |
345 | m_read8_romB: # 0x580000 - 0x5fffff |
346 | m_read8_rom 0xB |
347 | |
348 | m_read8_romC: # 0x600000 - 0x67ffff |
349 | m_read8_rom 0xC |
350 | |
351 | m_read8_romD: # 0x680000 - 0x6fffff |
352 | m_read8_rom 0xD |
353 | |
354 | m_read8_romE: # 0x700000 - 0x77ffff |
355 | m_read8_rom 0xE |
356 | |
357 | m_read8_romF: # 0x780000 - 0x7fffff |
358 | m_read8_rom 0xF |
359 | |
360 | m_read8_rom10: # 0x800000 - 0x87ffff |
361 | m_read8_rom 0x10 |
362 | |
363 | m_read8_rom11: # 0x880000 - 0x8fffff |
364 | m_read8_rom 0x11 |
365 | |
366 | m_read8_rom12: # 0x900000 - 0x97ffff |
367 | m_read8_rom 0x12 |
368 | |
369 | m_read8_rom13: # 0x980000 - 0x9fffff |
370 | m_read8_rom 0x13 |
371 | |
372 | |
373 | m_read8_misc: |
374 | srl $t0, $a0, 5 |
375 | sll $t0, $t0, 5 |
376 | lui $t1, 0xa1 |
377 | bne $t0, $t1, m_read8_misc2 |
378 | andi $t0, $a0, 0x1e |
379 | m_read8_misc_io: |
380 | beqz $t0, m_read8_misc_hwreg |
381 | sub $t1, $t0, 4 |
382 | bgtz $t1, m_read8_misc_ioports |
383 | nop |
384 | slti $a0, $t0, 4 |
385 | xori $a0, 1 |
386 | j PadRead |
387 | nop |
388 | |
389 | m_read8_misc_hwreg: |
390 | lui $v0, %hi(Pico+0x2220f) |
391 | jr $ra |
392 | lb $v0, %lo(Pico+0x2220f)($v0) |
393 | |
394 | m_read8_misc_ioports: |
395 | lui $v0, %hi(Pico+0x22000) |
396 | ins $v0, $t0, 0, 5 |
397 | jr $ra |
398 | lb $v0, %lo(Pico+0x22000)($v0) |
399 | |
400 | m_read8_misc2: |
401 | lui $t0, 0xa1 |
402 | ori $t0, 0x1100 |
403 | bne $a0, $t0, m_read8_misc3 |
404 | srl $t0, $a0, 16 |
405 | j z80ReadBusReq |
406 | |
407 | m_read8_misc3: |
408 | addiu $t0, 0xff60 # expecting 0xa0 to get 0 |
409 | bnez $t0, m_read8_misc4 |
410 | |
411 | # z80 area |
412 | andi $t0, $a0, 0x4000 |
413 | bnez $t0, m_read8_z80_misc |
414 | andi $t0, $a0, 0x6000 |
415 | j z80Read8 # z80 RAM |
416 | |
417 | m_read8_z80_misc: |
418 | addiu $t0, 0xc000 # expecting 0x4000 to get 0 |
419 | bnez $t0, m_read_neg1 # invalid |
420 | |
421 | lui $t0, %hi(PicoOpt) |
422 | lw $t0, %lo(PicoOpt)($t0) |
423 | andi $t0, 1 |
43e6eaad |
424 | bnez $t0, ym2612_read_local_68k |
425 | nop |
3ec29f01 |
426 | |
427 | m_read8_fake_ym2612: |
428 | lb $v0, %lo(Pico+0x22208)($t0) # Pico.m.rotate |
429 | addiu $t1, $v0, 1 |
430 | jr $ra |
431 | sb $t1, %lo(Pico+0x22208)($t0) |
432 | |
433 | # delay slot friendly |
0ffefdb8 |
434 | .macro m_read8_call16 funcname is_func_ptr=0 |
435 | .if \is_func_ptr |
436 | lui $t1, %hi(\funcname) |
437 | lw $t1, %lo(\funcname)($t1) |
438 | .endif |
3ec29f01 |
439 | andi $t0, $a0, 1 |
440 | beqz $t0, 1f |
441 | li $a1, 8 # not always needed, but shouln't cause problems |
0ffefdb8 |
442 | .if \is_func_ptr |
443 | jr $t1 |
444 | .else |
3ec29f01 |
445 | j \funcname # odd address |
0ffefdb8 |
446 | .endif |
3ec29f01 |
447 | nop |
448 | 1: |
449 | addiu $sp, -4 |
450 | sw $ra, 0($sp) |
0ffefdb8 |
451 | .if \is_func_ptr |
452 | jalr $t1 |
453 | .else |
3ec29f01 |
454 | jal \funcname |
0ffefdb8 |
455 | .endif |
3ec29f01 |
456 | xori $a0, 1 |
457 | lw $ra, 0($sp) |
458 | addiu $sp, 4 |
459 | jr $ra |
460 | srl $v0, 8 |
461 | .endm |
462 | |
463 | m_read8_misc4: |
464 | # if everything else fails, use generic handler |
465 | m_read8_call16 OtherRead16 |
466 | |
467 | m_read8_vdp: |
468 | ext $t0, $a0, 16, 3 |
469 | andi $t1, $a0, 0xe0 |
470 | or $t0, $t1 |
471 | bnez $t0, m_read_null # invalid address |
9761a7d0 |
472 | nop |
473 | j PicoVideoRead8 |
474 | nop |
3ec29f01 |
475 | |
476 | m_read8_ram: |
477 | lui $t0, %hi(Pico) |
478 | ins $t0, $a0, 0, 16 |
479 | xori $t0, 1 |
480 | jr $ra |
481 | lb $v0, %lo(Pico)($t0) |
482 | |
483 | m_read8_above_rom: |
484 | # might still be SRam (Micro Machines, HardBall '95) |
485 | m_read_rom_try_sram 0 8 |
0ffefdb8 |
486 | m_read8_call16 PicoRead16Hook 1 |
3ec29f01 |
487 | |
488 | # ############################################################################# |
489 | |
490 | .macro m_read16_rom sect |
491 | lui $t0, %hi(Pico+0x22200) |
492 | lw $t0, %lo(Pico+0x22200)($t0) # rom |
493 | ins $a0, $0, 0, 1 |
494 | ins $a0, $0, 19, 13 |
495 | .if \sect |
496 | lui $t1, 8*\sect |
497 | addu $a0, $t1 |
498 | .endif |
499 | addu $t0, $a0 |
500 | jr $ra |
501 | lh $v0, 0($t0) |
502 | .endm |
503 | |
504 | |
505 | m_read16_rom0: # 0x000000 - 0x07ffff |
506 | m_read16_rom 0 |
507 | |
508 | m_read16_rom1: # 0x080000 - 0x0fffff |
509 | m_read16_rom 1 |
510 | |
511 | m_read16_rom2: # 0x100000 - 0x17ffff |
512 | m_read16_rom 2 |
513 | |
514 | m_read16_rom3: # 0x180000 - 0x1fffff |
515 | m_read16_rom 3 |
516 | |
517 | m_read16_rom4: # 0x200000 - 0x27ffff, SRAM area |
518 | m_read_rom_try_sram 1 16 |
519 | lw $t1, 4($t3) # romsize |
520 | subu $t4, $t1, $a0 |
521 | blez $t4, m_read_null |
522 | lw $t1, 0($t3) # rom |
523 | ins $a0, $0, 0, 1 |
524 | addu $t1, $a0 |
525 | jr $ra |
526 | lh $v0, 0($t1) |
527 | |
528 | m_read16_rom5: # 0x280000 - 0x2fffff |
529 | m_read16_rom 5 |
530 | |
531 | m_read16_rom6: # 0x300000 - 0x37ffff |
532 | m_read16_rom 6 |
533 | |
534 | m_read16_rom7: # 0x380000 - 0x3fffff |
535 | m_read16_rom 7 |
536 | |
537 | m_read16_rom8: # 0x400000 - 0x47ffff |
538 | m_read16_rom 8 |
539 | |
540 | m_read16_rom9: # 0x480000 - 0x4fffff |
541 | m_read16_rom 9 |
542 | |
543 | m_read16_romA: # 0x500000 - 0x57ffff |
544 | m_read16_rom 0xA |
545 | |
546 | m_read16_romB: # 0x580000 - 0x5fffff |
547 | m_read16_rom 0xB |
548 | |
549 | m_read16_romC: # 0x600000 - 0x67ffff |
550 | m_read16_rom 0xC |
551 | |
552 | m_read16_romD: # 0x680000 - 0x6fffff |
553 | m_read16_rom 0xD |
554 | |
555 | m_read16_romE: # 0x700000 - 0x77ffff |
556 | m_read16_rom 0xE |
557 | |
558 | m_read16_romF: # 0x780000 - 0x7fffff |
559 | m_read16_rom 0xF |
560 | |
561 | m_read16_rom10: # 0x800000 - 0x87ffff |
562 | m_read16_rom 0x10 |
563 | |
564 | m_read16_rom11: # 0x880000 - 0x8fffff |
565 | m_read16_rom 0x11 |
566 | |
567 | m_read16_rom12: # 0x900000 - 0x97ffff |
568 | m_read16_rom 0x12 |
569 | |
570 | m_read16_rom13: # 0x980000 - 0x9fffff |
571 | m_read16_rom 0x13 |
572 | |
573 | m_read16_misc: |
574 | ins $a0, $0, 0, 1 |
575 | j OtherRead16 |
576 | li $a1, 16 |
577 | |
578 | m_read16_vdp: |
579 | ext $t0, $a0, 16, 3 |
580 | andi $t1, $a0, 0xe0 |
581 | or $t0, $t1 |
582 | bnez $t0, m_read_null # invalid address |
583 | ins $a0, $0, 0, 1 |
584 | j PicoVideoRead |
585 | nop |
586 | |
587 | m_read16_ram: |
588 | lui $t0, %hi(Pico) |
589 | ins $a0, $0, 0, 1 |
590 | ins $t0, $a0, 0, 16 |
591 | jr $ra |
592 | lh $v0, %lo(Pico)($t0) |
593 | |
594 | m_read16_above_rom: |
595 | # might still be SRam |
596 | m_read_rom_try_sram 0 16 |
0ffefdb8 |
597 | lui $t1, %hi(PicoRead16Hook) |
598 | lw $t1, %lo(PicoRead16Hook)($t1) |
599 | jr $t1 |
3ec29f01 |
600 | ins $a0, $0, 0, 1 |
601 | |
602 | # ############################################################################# |
603 | |
604 | .macro m_read32_rom sect |
605 | lui $t0, %hi(Pico+0x22200) |
606 | lw $t0, %lo(Pico+0x22200)($t0) # rom |
607 | ins $a0, $0, 0, 1 |
608 | ins $a0, $0, 19, 13 |
609 | .if \sect |
610 | lui $t1, 8*\sect |
611 | addu $a0, $t1 |
612 | .endif |
613 | addu $t0, $a0 |
614 | lh $v1, 0($t0) |
615 | lh $v0, 2($t0) |
616 | jr $ra |
617 | ins $v0, $v1, 16, 16 |
618 | .endm |
619 | |
620 | |
621 | m_read32_rom0: # 0x000000 - 0x07ffff |
622 | m_read32_rom 0 |
623 | |
624 | m_read32_rom1: # 0x080000 - 0x0fffff |
625 | m_read32_rom 1 |
626 | |
627 | m_read32_rom2: # 0x100000 - 0x17ffff |
628 | m_read32_rom 2 |
629 | |
630 | m_read32_rom3: # 0x180000 - 0x1fffff |
631 | m_read32_rom 3 |
632 | |
633 | m_read32_rom4: # 0x200000 - 0x27ffff, SRAM area |
634 | m_read_rom_try_sram 1 32 |
635 | lw $t1, 4($t3) # romsize |
636 | subu $t4, $t1, $a0 |
637 | blez $t4, m_read_null |
638 | lw $t1, 0($t3) # rom |
639 | ins $a0, $0, 0, 1 |
640 | addu $t1, $a0 |
641 | lh $v1, 0($t1) |
642 | lh $v0, 2($t1) |
643 | jr $ra |
644 | ins $v0, $v1, 16, 16 |
645 | |
646 | m_read32_rom5: # 0x280000 - 0x2fffff |
647 | m_read32_rom 5 |
648 | |
649 | m_read32_rom6: # 0x300000 - 0x37ffff |
650 | m_read32_rom 6 |
651 | |
652 | m_read32_rom7: # 0x380000 - 0x3fffff |
653 | m_read32_rom 7 |
654 | |
655 | m_read32_rom8: # 0x400000 - 0x47ffff |
656 | m_read32_rom 8 |
657 | |
658 | m_read32_rom9: # 0x480000 - 0x4fffff |
659 | m_read32_rom 9 |
660 | |
661 | m_read32_romA: # 0x500000 - 0x57ffff |
662 | m_read32_rom 0xA |
663 | |
664 | m_read32_romB: # 0x580000 - 0x5fffff |
665 | m_read32_rom 0xB |
666 | |
667 | m_read32_romC: # 0x600000 - 0x67ffff |
668 | m_read32_rom 0xC |
669 | |
670 | m_read32_romD: # 0x680000 - 0x6fffff |
671 | m_read32_rom 0xD |
672 | |
673 | m_read32_romE: # 0x700000 - 0x77ffff |
674 | m_read32_rom 0xE |
675 | |
676 | m_read32_romF: # 0x780000 - 0x7fffff |
677 | m_read32_rom 0xF |
678 | |
679 | m_read32_rom10: # 0x800000 - 0x87ffff |
680 | m_read32_rom 0x10 |
681 | |
682 | m_read32_rom11: # 0x880000 - 0x8fffff |
683 | m_read32_rom 0x11 |
684 | |
685 | m_read32_rom12: # 0x900000 - 0x97ffff |
686 | m_read32_rom 0x12 |
687 | |
688 | m_read32_rom13: # 0x980000 - 0x9fffff |
689 | m_read32_rom 0x13 |
690 | |
691 | .macro m_read32_call16 func need_a1=0 |
692 | addiu $sp, -8 |
693 | sw $ra, 0($sp) |
694 | sw $s0, 4($sp) |
695 | .if \need_a1 |
696 | li $a1, 16 |
697 | .endif |
698 | jal \func |
699 | move $s0, $a0 |
700 | |
701 | addu $a0, $s0, 2 |
702 | .if \need_a1 |
703 | li $a1, 16 |
704 | .endif |
705 | jal \func |
706 | move $s0, $v0 |
707 | |
708 | ins $v0, $s0, 16, 16 |
709 | lw $ra, 0($sp) |
710 | lw $s0, 4($sp) |
711 | jr $ra |
712 | addiu $sp, 8 |
713 | .endm |
714 | |
715 | m_read32_misc: |
716 | ins $a0, $0, 0, 1 |
717 | m_read32_call16 OtherRead16, 1 |
718 | |
719 | m_read32_vdp: |
720 | ext $t0, $a0, 16, 3 |
721 | andi $t1, $a0, 0xe0 |
722 | or $t0, $t1 |
723 | bnez $t0, m_read_null # invalid address |
724 | ins $a0, $0, 0, 1 |
725 | m_read32_call16 PicoVideoRead |
726 | |
727 | m_read32_ram: |
728 | lui $t0, %hi(Pico) |
729 | ins $a0, $0, 0, 1 |
730 | ins $t0, $a0, 0, 16 |
731 | lh $v1, %lo(Pico)($t0) |
732 | lh $v0, %lo(Pico+2)($t0) |
733 | jr $ra |
734 | ins $v0, $v1, 16, 16 |
735 | |
736 | m_read32_above_rom: |
737 | # might still be SRam |
738 | m_read_rom_try_sram 0 32 |
739 | ins $a0, $0, 0, 1 |
0ffefdb8 |
740 | lui $t1, %hi(PicoRead16Hook) |
741 | lw $t1, %lo(PicoRead16Hook)($t1) |
742 | addiu $sp, -4*3 |
743 | sw $ra, 0($sp) |
744 | sw $s0, 4($sp) |
745 | sw $t1, 8($sp) |
746 | jalr $t1 |
747 | move $s0, $a0 |
748 | |
749 | lw $t1, 8($sp) |
750 | addu $a0, $s0, 2 |
751 | jalr $t1 |
752 | move $s0, $v0 |
753 | |
754 | ins $v0, $s0, 16, 16 |
755 | lw $ra, 0($sp) |
756 | lw $s0, 4($sp) |
757 | jr $ra |
758 | addiu $sp, 4*3 |
3ec29f01 |
759 | |
760 | # ############################################################################# |
761 | |
762 | .macro PicoWriteRomHW_SSF2_ls def_table table |
763 | lui $t3, %hi(\def_table) |
764 | ins $t3, $a1, 2, 5 |
765 | lw $t0, %lo(\def_table)($t3) |
766 | lui $t2, %hi(\table) |
767 | ins $t2, $a0, 2, 3 |
768 | sw $t0, %lo(\table)($t2) |
769 | .endm |
770 | |
771 | PicoWriteRomHW_SSF2: # u32 a, u32 d |
772 | ext $a0, $a0, 1, 3 |
773 | bnez $a0, pwr_banking |
774 | |
775 | # sram register |
776 | lui $t0, %hi(Pico+0x22211) |
777 | lb $t1, %lo(Pico+0x22211)($t0) # Pico.m.sram_reg |
778 | ins $t1, $a1, 0, 2 |
779 | jr $ra |
780 | sb $t1, %lo(Pico+0x22211)($t0) |
781 | |
782 | pwr_banking: |
783 | andi $a1, 0x1f |
784 | |
785 | PicoWriteRomHW_SSF2_ls m_read8_def_table m_read8_table |
786 | PicoWriteRomHW_SSF2_ls m_read16_def_table m_read16_table |
787 | PicoWriteRomHW_SSF2_ls m_read32_def_table m_read32_table |
788 | |
789 | jr $ra |
790 | nop |
791 | |