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SiS 471: Register 69h is read/write, not read/write clear, fixes hangs in SMM on the DEC Venturis 4xx.

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OBattler
2024-05-09 01:28:54 +02:00
parent b0542322bf
commit 179c4fc279
2 changed files with 4 additions and 6 deletions
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4
src/chipset/sis_85c4xx.c
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@@ -174,9 +174,7 @@ sis_85c4xx_out(uint16_t port, uint8_t val, void *priv)
case 0x23:
if ((dev->cur_reg >= dev->reg_base) && (dev->cur_reg <= dev->reg_last)) {
valxor = val ^ dev->regs[rel_reg];
if (rel_reg == 0x19)
dev->regs[rel_reg] &= ~val;
else if (rel_reg == 0x00)
if (rel_reg == 0x00)
dev->regs[rel_reg] = (dev->regs[rel_reg] & 0x1f) | (val & 0xe0);
else
dev->regs[rel_reg] = val;