Category : Files from Magazines
Archive   : ITP9010.ZIP
Filename : CPU.PAS

 
Output of file : CPU.PAS contained in archive : ITP9010.ZIP
PROGRAM Cpu;

TYPE
SysInfo = OBJECT
FUNCTION GetCpuId: Integer;
END;

{$F+}FUNCTION SysInfo.GetCpuId: Integer;{$F-}

BEGIN

INLINE( {Inline assembler code to identify the CPU TYPE}

$9C/ { pushf ;save Flags register }
$5B/ { pop bx ;Store Flags in BX }
$81/$E3/$FF/$0F/ { and bx,$0fff ;clear bits 12-15 }
$53/ { push bx ;restore to stack }
$9D/ { popf ;pop word into Flags reg }
$9C/ { pushf ;store Flags on stack }
$58/ { pop ax ;recover Flags word }
$25/$00/$F0/ { and ax,$0f000 ;if bits 12-15 are set, }
$3D/$00/$F0/ { cmp ax,$0f000 ; the proc. is an 8086 }
$74/$19/ { jz is8086 }
$81/$CB/$00/$F0/ { or bx,$0f000 ;try to set 12-15 bits }
$53/ { push bx ;store on stack }
$9D/ { popf ;pop word into the Flags }
$9C/ { pushf ;store Flags on stack }
$58/ { pop ax ;recover Flags word }
$25/$00/$F0/ { and ax,$0f000 ;if bits 12-15 cleared }
$74/$06/ { jz is80286 ; the proc. is an 80286 }
{is80386: }
$B8/$82/$01/ { mov ax,386 ;else proc. is a 386 CPU }
$E9/$09/$00/ { jmp done ;set as a 386 CPU }
{is80286: }
$B8/$1E/$01/ { mov ax,286 ;set the 80286 indicator }
$E9/$03/$00/ { jmp done }
{is8086: }
$B8/$56/$00/ { mov ax,86 ;set the 8086 indicator }
{done: }
$89/$EC/ { mov sp,bp ;restore sp }
$5D/ { pop bp ;restore bp }
$CA/$04/$00); { retf 4 ;pop ptr to self }

END;

VAR
CpuNbr : Integer;
SI : SysInfo;

BEGIN
WriteLn('CPU Identification Routine');
CpuNbr := SI.GetCpuId;
Write('You are using a ');
CASE CpuNbr OF
86 : Write('8086');
286 : Write('80286');
386 : Write('80386');
END;
WriteLn(' Cpu');
END.


  3 Responses to “Category : Files from Magazines
Archive   : ITP9010.ZIP
Filename : CPU.PAS

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/