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r8729 Saturday 7th August, 2010 at 12:04:01 UTC by Fabio Priuli
[MAX] possible workaround for issues when loading carts not using softlist

[src/mess/machine]

c64.c

src/mess/machine/c64.c

r8728	r8729
1037	1037	const char *filetype;
1038	1038	int address = 0, new_start = 0;
1039	1039	// int lbank_end_addr = 0, hbank_end_addr = 0;
1040		UINT8 *cart = memory_region(image.device().machine, "user1");
	1040	UINT8 *temp_cart = auto_alloc_array(image.device().machine, UINT8, size);
1041	1041
1042	1042	filetype = image.filetype();
1043	1043
r8728	r8729
1051	1051	;
1052	1052
1053	1053	if (i >= ARRAY_LENGTH(c64_cbm_cart))
	1054	{
	1055	auto_free(image.device().machine, temp_cart);
1054	1056	return IMAGE_INIT_FAIL;
1055
	1057	}
	1058
1056	1059	/* Start to parse the .crt header */
1057	1060	/* 0x16-0x17 is Hardware type */
1058	1061	image.fseek(0x16, SEEK_SET);
1059		image.fread( &c64_cart_type, 2);
	1062	image.fread(&c64_cart_type, 2);
1060	1063	c64_cart_type = BIG_ENDIANIZE_INT16(c64_cart_type);
1061	1064	c64_mapper = c64_cart_type;
1062	1065
r8728	r8729
1094	1097
1095	1098	/* 0x18 is EXROM */
1096	1099	image.fseek(0x18, SEEK_SET);
1097		image.fread( &cbm_c64_exrom, 1);
	1100	image.fread(&cbm_c64_exrom, 1);
1098	1101
1099	1102	/* 0x19 is GAME */
1100		image.fread( &cbm_c64_game, 1);
	1103	image.fread(&cbm_c64_game, 1);
1101	1104
1102	1105	/* We can pass to the data: it starts from 0x40 */
1103	1106	image.fseek(0x40, SEEK_SET);
r8728	r8729
1118	1121
1119	1122	/* Start to parse the CHIP header */
1120	1123	/* First 4 bytes are the string 'CHIP' */
1121		image.fread( buffer, 6);
	1124	image.fread(buffer, 6);
1122	1125
1123	1126	/* 0x06-0x07 is the size of the CHIP block (header + data) */
1124		image.fread( &chip_size, 2);
	1127	image.fread(&chip_size, 2);
1125	1128	chip_size = BIG_ENDIANIZE_INT16(chip_size);
1126	1129
1127	1130	/* 0x08-0x09 chip type (ROM, RAM + no ROM, Flash ROM) */
1128		image.fread( buffer + 6, 2);
	1131	image.fread(buffer + 6, 2);
1129	1132
1130	1133	/* 0x0a-0x0b is the bank number of the CHIP block */
1131		image.fread( &chip_bank_index, 2);
	1134	image.fread(&chip_bank_index, 2);
1132	1135	chip_bank_index = BIG_ENDIANIZE_INT16(chip_bank_index);
1133	1136
1134	1137	/* 0x0c-0x0d is the loading address of the CHIP block */
1135		image.fread( &address, 2);
	1138	image.fread(&address, 2);
1136	1139	address = BIG_ENDIANIZE_INT16(address);
1137	1140
1138	1141	/* 0x0e-0x0f is the data size of the CHIP block (without header) */
1139		image.fread( &chip_data_size, 2);
	1142	image.fread(&chip_data_size, 2);
1140	1143	chip_data_size = BIG_ENDIANIZE_INT16(chip_data_size);
1141	1144
1142	1145	/* Print out the CHIP header! */
r8728	r8729
1149	1152	/* Does CHIP contain any data? */
1150	1153	c64_cbm_cart[i].chip = (UINT8*) image.image_malloc(chip_data_size);
1151	1154	if (!c64_cbm_cart[i].chip)
	1155	{
	1156	auto_free(image.device().machine, temp_cart);
1152	1157	return IMAGE_INIT_FAIL;
1153
	1158	}
	1159
1154	1160	/* Store data, address & size of the CHIP block */
1155	1161	c64_cbm_cart[i].addr = address;
1156	1162	c64_cbm_cart[i].index = chip_bank_index;
1157	1163	c64_cbm_cart[i].size = chip_data_size;
1158	1164	c64_cbm_cart[i].start = new_start;
1159	1165
1160		test = image.fread( c64_cbm_cart[i].chip, chip_data_size);
	1166	test = image.fread(c64_cbm_cart[i].chip, chip_data_size);
1161	1167
1162		memcpy(&cart[new_start], c64_cbm_cart[i].chip, c64_cbm_cart[i].size);
	1168	memcpy(&temp_cart[new_start], c64_cbm_cart[i].chip, c64_cbm_cart[i].size);
1163	1169	new_start += c64_cbm_cart[i].size;
1164	1170
1165	1171	if (test != chip_data_size)
	1172	{
	1173	auto_free(image.device().machine, temp_cart);
1166	1174	return IMAGE_INIT_FAIL;
1167
	1175	}
	1176
1168	1177	/* Advance to the next CHIP block */
1169	1178	i++;
1170	1179	j += chip_size;
r8728	r8729
1187	1196	/* Does cart contain any data? */
1188	1197	c64_cbm_cart[0].chip = (UINT8*) image.image_malloc(size);
1189	1198	if (!c64_cbm_cart[0].chip)
	1199	{
	1200	auto_free(image.device().machine, temp_cart);
1190	1201	return IMAGE_INIT_FAIL;
1191
	1202	}
	1203
1192	1204	/* Store data, address & size */
1193	1205	c64_cbm_cart[0].addr = address;
1194	1206	c64_cbm_cart[0].size = size;
1195	1207	c64_cbm_cart[0].start = new_start;
1196	1208
1197		test = image.fread( c64_cbm_cart[0].chip, size);
	1209	test = image.fread(c64_cbm_cart[0].chip, size);
1198	1210
1199		memcpy(&cart[new_start], c64_cbm_cart[0].chip, c64_cbm_cart[0].size);
	1211	memcpy(&temp_cart[new_start], c64_cbm_cart[0].chip, c64_cbm_cart[0].size);
1200	1212	new_start += c64_cbm_cart[0].size;
1201	1213
1202	1214	if (test != c64_cbm_cart[0].size)
	1215	{
	1216	auto_free(image.device().machine, temp_cart);
1203	1217	return IMAGE_INIT_FAIL;
	1218	}
1204	1219	}
1205	1220
1206	1221	n_banks = i;
r8728	r8729
1222	1237	switch (c64_mapper)
1223	1238	{
1224	1239	case ZAXXON:
1225		memcpy(romh, cart + 0x1000, 0x2000);
	1240	memcpy(romh, temp_cart + 0x1000, 0x2000);
1226	1241	break;
1227	1242	default:
1228	1243	if (!c64_game && c64_exrom && (n_banks == 1))
1229		memcpy(romh, cart, 0x2000);
	1244	memcpy(romh, temp_cart, 0x2000);
1230	1245	else
1231	1246	{
1232		memcpy(roml, cart + 0 * 0x2000, 0x2000);
1233		memcpy(romh, cart + 1 * 0x2000, 0x2000);
	1247	memcpy(roml, temp_cart + 0 * 0x2000, 0x2000);
	1248	memcpy(romh, temp_cart + 1 * 0x2000, 0x2000);
1234	1249	}
1235	1250	}
1236	1251
1237	1252	c64_cart_n_banks = n_banks; // this is needed so that we only set mappers if a cart is present!
1238	1253
	1254	memcpy(memory_region(image.device().machine, "user1"), temp_cart, size);
	1255	auto_free(image.device().machine, temp_cart);
1239	1256	return IMAGE_INIT_PASS;
1240	1257	}
1241	1258

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