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CPUID Instruction

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@936
This commit is contained in:
Sjoerd van der Berg 2003-04-16 16:34:37 +00:00
parent df814b12ce
commit 2639d29db8
5 changed files with 30 additions and 4 deletions
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23
src/cpu/cpu.cpp
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@ -569,11 +569,30 @@ bool CPU_SetSegGeneral(SegNames seg,Bitu value) {
return false;
}
void CPU_CPUID(void) {
switch (reg_eax) {
case 0: /* Vendor ID String and maximum level? */
reg_eax=0;
reg_ebx=('G'<< 24) || ('e' << 16) || ('n' << 8) || 'u';
reg_edx=('i'<< 24) || ('n' << 16) || ('e' << 8) || 'T';
reg_ecx=('n'<< 24) || ('t' << 16) || ('e' << 8) || 'l';
break;
case 1: /* get processor type/family/model/stepping and feature flags */
reg_eax=0x402; /* intel 486 sx? */
reg_ebx=0; /* Not Supported */
reg_ecx=0; /* No features */
reg_edx=0; /* Nothing either */
break;
default:
LOG(LOG_CPU|LOG_ERROR,"Unhandled CPUID Function %x",reg_eax);
break;
}
}
void CPU_Real_16_Slow_Start(void);
void CPU_Core_Full_Start(void);
void SetCPU16bit()
{
cpu.state=0;