Mercurial > repos > blastem
annotate multi_game.c @ 1863:d60f2d7c02a5
Differentiate between the full Sega mapper and the SRAM only one. Fixes crash on save state load for Phantasy Star IV and other games that use the same mapper
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Tue, 14 May 2019 23:20:35 -0700 |
parents | adb62000d296 |
children |
rev | line source |
---|---|
1416
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1 #include "genesis.h" |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
2 |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
3 void *write_multi_game_b(uint32_t address, void *vcontext, uint8_t value) |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
4 { |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
5 m68k_context *context = vcontext; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
6 genesis_context *gen = context->system; |
1444
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
7 gen->bank_regs[0] = address; |
1416
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
8 uint32_t base = (address & 0x3F) << 16, start = 0, end = 0x400000; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
9 //find the memmap chunk, so we can properly mask the base value |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
10 for (int i = 0; i < context->options->gen.memmap_chunks; i++) |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
11 { |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
12 if (context->options->gen.memmap[i].flags & MMAP_PTR_IDX) { |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
13 base &= context->options->gen.memmap[i].mask; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
14 start = context->options->gen.memmap[i].start; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
15 end = context->options->gen.memmap[i].end; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
16 break; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
17 } |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
18 } |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
19 context->mem_pointers[gen->mapper_start_index] = gen->cart + base/2; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
20 m68k_invalidate_code_range(context, start, end); |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
21 return vcontext; |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
22 } |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
23 |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
24 void *write_multi_game_w(uint32_t address, void *context, uint16_t value) |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
25 { |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
26 return write_multi_game_b(address, context, value); |
11ac0b511cff
Support a couple of bootleg X-in-1 carts
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
27 } |
1444
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
28 |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
29 void multi_game_serialize(genesis_context *gen, serialize_buffer *buf) |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
30 { |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
31 save_int8(buf, gen->bank_regs[0]); |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
32 } |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
33 |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
34 void multi_game_deserialize(deserialize_buffer *buf, genesis_context *gen) |
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
35 { |
1446
adb62000d296
Pass the correct context pointer to write handlers in mapper deserialize functions
Michael Pavone <pavone@retrodev.com>
parents:
1444
diff
changeset
|
36 write_multi_game_b(load_int8(buf), gen->m68k, 0); |
1444
14a2834d010c
Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents:
1416
diff
changeset
|
37 } |