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Introduce some one-off memory fixes for poorly-written kracks

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This commit is contained in:
Aaron Culliney 2018-11-11 08:00:43 -08:00
parent ae5a2c4d61
commit f235dd6d7c
2 changed files with 28 additions and 1 deletions
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1
src/misc.c
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@ -41,6 +41,7 @@ CrashHandler_s *crashHandler = NULL;
static void _init_common(void) {
data_dir = STRDUP(CONFIG_DATADIR PATH_SEPARATOR PACKAGE_NAME);
log_init();
srandom((unsigned int)time(NULL));
LOG("Initializing common...");
}

28
src/vm.c
View File

@ -1090,13 +1090,39 @@ static void _initialize_apple_ii_memory(void) {
}
// Stripe words of main memory on machine reset ...
// NOTE: cracked version of J---- will lock up without this
// NOTE: cracked version of Joust will lock up without this
for (unsigned int i = 0; i < 0xC000;) {
apple_ii_64k[0][i++] = 0xFF;
apple_ii_64k[0][i++] = 0xFF;
i += 2;
}
#if !CPU_TRACING && !VIDEO_TRACING
// certain memory locations randomized at cold-boot ...
for (uint16_t addr = 0x0000; addr < 0xC000; addr += 0x200)
{
uint16_t word;
word = random();
apple_ii_64k[0][addr + 0x28] = (word >> 0) & 0xFF;
apple_ii_64k[0][addr + 0x29] = (word >> 8) & 0xFF;
word = random();
apple_ii_64k[0][addr + 0x68] = (word >> 0) & 0xFF;
apple_ii_64k[0][addr + 0x69] = (word >> 8) & 0xFF;
}
// memory initialization workarounds ...
{
// https://github.com/AppleWin/AppleWin/issues/206
// work around cold-booting bug in "Pooyan" which expects RNDL and RNDH to be non-zero
// "Dung Beetles, Ms. PacMan, Pooyan, Star Cruiser, Star Thief, Invas. Force.dsk"
uint16_t word = (uint16_t)random();
apple_ii_64k[0][0x4E] = 0x20 | ((word >> 0) & 0xFF);
apple_ii_64k[0][0x4F] = 0x20 | ((word >> 8) & 0xFF);
}
#endif
for (unsigned int i = 0; i < 8192; i++) {
language_card[0][i] = language_card[1][i] = 0;
}