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comparison realtec.c @ 1444:14a2834d010c

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Save/restore mapper state in native save states
author Michael Pavone <pavone@retrodev.com>
date Sun, 27 Aug 2017 18:15:00 -0700
parents 11ac0b511cff
children adb62000d296
comparison
equal deleted inserted replaced
1443:93c1b056ccdd 1444:14a2834d010c
18 return 0; 18 return 0;
19 } 19 }
20 return memcmp(rom + 0x7E100, "SEGA", 4) == 0; 20 return memcmp(rom + 0x7E100, "SEGA", 4) == 0;
21 } 21 }
22 22
23 static realtec *get_realtec(genesis_context *gen)
24 {
25 if (!gen->extra) {
26 gen->extra = gen->m68k->mem_pointers[0];
27 }
28 return gen->extra;
29 }
30
23 static void *realtec_write_b(uint32_t address, void *context, uint8_t value) 31 static void *realtec_write_b(uint32_t address, void *context, uint8_t value)
24 { 32 {
25 if (address & 1) { 33 if (address & 1) {
26 return context; 34 return context;
27 } 35 }
28 m68k_context *m68k = context; 36 m68k_context *m68k = context;
29 genesis_context *gen = m68k->system; 37 genesis_context *gen = m68k->system;
30 if (!gen->extra) { 38 realtec *r = get_realtec(gen);
31 gen->extra = m68k->mem_pointers[0];
32 }
33 realtec *r = gen->extra;
34 uint32_t offset = address >> 13; 39 uint32_t offset = address >> 13;
35 uint8_t dirty = 0;
36 if (offset < 3 && r->regs[offset] != value) { 40 if (offset < 3 && r->regs[offset] != value) {
37 r->regs[offset] = value; 41 r->regs[offset] = value;
38 //other regs are only 3 bits, so assume 3 for this one too 42 //other regs are only 3 bits, so assume 3 for this one too
39 uint32_t size = (r->regs[1] & 0x7) << 17; 43 uint32_t size = (r->regs[1] & 0x7) << 17;
40 uint32_t start = (r->regs[2] & 7) << 17 | (r->regs[0] & 6) << 19; 44 uint32_t start = (r->regs[2] & 7) << 17 | (r->regs[0] & 6) << 19;
57 } 61 }
58 62
59 static void *realtec_write_w(uint32_t address, void *context, uint16_t value) 63 static void *realtec_write_w(uint32_t address, void *context, uint16_t value)
60 { 64 {
61 return realtec_write_b(address, context, value >> 8); 65 return realtec_write_b(address, context, value >> 8);
66 }
67
68 void realtec_serialize(genesis_context *gen, serialize_buffer *buf)
69 {
70 realtec *r = get_realtec(gen);
71 save_buffer8(buf, r->regs, sizeof(r->regs));
72 }
73
74 void realtec_deserialize(deserialize_buffer *buf, genesis_context *gen)
75 {
76 realtec *r = get_realtec(gen);
77 for (int i = 0; i < sizeof(r->regs); i++)
78 {
79 realtec_write_b(i << 13, gen, load_int8(buf));
80 }
62 } 81 }
63 82
64 rom_info realtec_configure_rom(uint8_t *rom, uint32_t rom_size, memmap_chunk const *base_map, uint32_t base_chunks) 83 rom_info realtec_configure_rom(uint8_t *rom, uint32_t rom_size, memmap_chunk const *base_map, uint32_t base_chunks)
65 { 84 {
66 rom_info info; 85 rom_info info;
102 info.save_buffer = NULL; 121 info.save_buffer = NULL;
103 info.num_eeprom = 0; 122 info.num_eeprom = 0;
104 info.eeprom_map = NULL; 123 info.eeprom_map = NULL;
105 info.rom = rom; 124 info.rom = rom;
106 info.rom_size = rom_size; 125 info.rom_size = rom_size;
126 info.mapper_type = MAPPER_REALTEC;
107 info.is_save_lock_on = 0; 127 info.is_save_lock_on = 0;
108 info.port1_override = info.port2_override = info.ext_override = info.mouse_mode = NULL; 128 info.port1_override = info.port2_override = info.ext_override = info.mouse_mode = NULL;
109 info.map_chunks = base_chunks + 2; 129 info.map_chunks = base_chunks + 2;
110 info.map = calloc(sizeof(memmap_chunk), info.map_chunks); 130 info.map = calloc(sizeof(memmap_chunk), info.map_chunks);
111 info.map[0].mask = sizeof(r->rom_space)-1; 131 info.map[0].mask = sizeof(r->rom_space)-1;