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The SiS 4xx chipset now no longer allow modifying the RAM amount bits of register 0x00, fixes #2306.

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OBattler
2023-11-07 06:34:04 +01:00
parent 69f5e9ae4b
commit 2cd7fe716d
1 changed files with 2 additions and 0 deletions
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src/chipset/sis_85c4xx.c
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@@ -176,6 +176,8 @@ sis_85c4xx_out(uint16_t port, uint8_t val, void *priv)
valxor = val ^ dev->regs[rel_reg];
if (rel_reg == 0x19)
dev->regs[rel_reg] &= ~val;
else if (rel_reg == 0x00)
dev->regs[rel_reg] = (dev->regs[rel_reg] & 0x1f) | (val & 0xe0);
else
dev->regs[rel_reg] = val;