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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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3
include/cpu.h
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@ -96,6 +96,9 @@ bool Interrupt(Bitu num);
bool CPU_IRET(bool use32);
bool CPU_SetSegGeneral(SegNames seg,Bitu value);
void CPU_CPUID(void);
//Flag Handling
Bitu get_CF(void);
Bitu get_AF(void);

3
src/cpu/core_full/load.h
View file

@ -388,6 +388,9 @@ l_M_Ed:
case D_AAS:
AAS();
goto nextopcode;
case D_CPUID:
CPU_CPUID();
goto nextopcode;
default:
LOG(LOG_CPU|LOG_ERROR,"LOAD:Unhandled code %d opcode %X",inst.code.load,inst.entry);
break;

4
src/cpu/core_full/optable.h
View file

@ -294,7 +294,7 @@ static OpCode OpCodeTable[1024]={
/* 0x1a0 - 0x1a7 */
{L_SEG ,0 ,S_PUSHw ,fs },{L_POPw ,0 ,S_SEGI ,fs },
{0 ,0 ,0 ,0 },{L_MODRM ,O_BTw ,0 ,0 },
{D_CPUID ,0 ,0 ,0 },{L_MODRM ,O_BTw ,0 ,0 },
{L_MODRM ,O_DSHLw ,S_Ew,M_EwGwIb },{L_MODRM ,O_DSHLw ,S_Ew ,M_EwGwCL },
{0 ,0 ,0 ,0 },{0 ,0 ,0 ,0 },
/* 0x1a8 - 0x1af */
@ -651,7 +651,7 @@ static OpCode OpCodeTable[1024]={
/* 0x3a0 - 0x3a7 */
{L_SEG ,0 ,S_PUSHd ,fs },{L_POPd ,0 ,S_SEGI ,fs },
{0 ,0 ,0 ,0 },{L_MODRM ,O_BTd ,0 ,0 },
{D_CPUID ,0 ,0 ,0 },{L_MODRM ,O_BTd ,0 ,0 },
{L_MODRM ,O_DSHLd ,S_Ed,M_EdGdIb },{L_MODRM ,O_DSHLd ,S_Ed ,M_EdGdCL },
{0 ,0 ,0 ,0 },{0 ,0 ,0 ,0 },
/* 0x3a8 - 0x3af */

1
src/cpu/core_full/support.h
View file

@ -42,6 +42,7 @@ enum {
D_RETFw,D_RETFd,
D_RETFwIw,D_RETFdIw,
D_CPUID,
};

23
src/cpu/cpu.cpp
View file

@ -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;