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Isolate 440BX special behavior to devbranch

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This commit is contained in:
RichardG867
2020-07-24 15:02:59 -03:00
parent 763b61c469
commit e8f2fb0915
1 changed files with 4 additions and 0 deletions
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4
src/chipset/intel_4x0.c
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@@ -443,8 +443,10 @@ i4x0_write(int func, int addr, uint8_t val, void *priv)
break;
case INTEL_440BX: case INTEL_440ZX:
regs[0x51] = (regs[0x50] & 0x70) | (val & 0x8f);
#if defined(DEV_BRANCH) && defined(USE_VIRTUALPC)
if (!strcmp(machines[machine].internal_name, "vpc2007"))
regs[0x51] |= 0x10; /* Virtual PC 2007 BIOS requires a reserved bus speed bit to be set */
#endif
break;
case INTEL_440GX:
regs[0x51] = (regs[0x50] & 0x88) | (val & 0x08);
@@ -1554,8 +1556,10 @@ static void
regs[0x51] |= 0x20;
else if ((cpu_busspeed > 66666667) && (cpu_busspeed <= 100000000))
regs[0x51] |= 0x00;
#if defined(DEV_BRANCH) && defined(USE_VIRTUALPC)
if (!strcmp(machines[machine].internal_name, "vpc2007"))
regs[0x51] |= 0x10; /* Virtual PC 2007 BIOS requires a reserved bus speed bit to be set */
#endif
regs[0x57] = 0x28; /* 4 DIMMs, SDRAM */
regs[0x58] = 0x03;
regs[0x60] = regs[0x61] = regs[0x62] = regs[0x63] = regs[0x64] = regs[0x65] = regs[0x66] = regs[0x67] = 0x01;