大连网站制作姚喜运成都百度网站排名优化

提供1个子程序:

　　1. CPU型号检测 CPUTYPE

无输入参数，返回值AX指示CPU类型(报歉,当时最新CPU型号只有80486)

函数的返回值详细描述如下

CPUTYPE PROC　　FAR ;OUT: AX=01, 8086; AX=02, 80286; AX=03, 80386; AX=04, 80486 UP;

; more source code at http://www.ahjoe.com/source/srcdown.aspPUBLIC  CPUTYPECODE    SEGMENTASSUME  CS:CODE
CPUTYPE PROC    FAR
;OUT: AX=01, 8086; AX=02, 80286; AX=03, 80386; AX=04, 80486 UP;PUSH    BXPUSHFPOP     AXMOV     BX, AXAND     AX, 0FFFH       ; CLEAR b15-b12PUSH    AXPOPFPUSHFPOP     AXAND     AH, 0F0HJNZ     IS8086MOV     AX, BXOR      AX, 0F000H      ; SET b15-b12PUSH    AXPOPFPUSHFPOP     AXAND     AH, 0F0HJZ      IS80286MOV     BX, SPAND     SP, NOT 3DB      66HPUSHFDB      66HPOP     AXDB      66HOR      AX, 0DW      4DB      66HPUSH    AXDB      66HPOPFDB      66HPUSHFDB      66HPOP     AXDB      66HTEST    AX, 0DW      4JZ      IS80386JMP     IS80486IS8086:MOV     AX, 01POP     BXRETFIS80286:MOV     AX, 02POP     BXRETFIS80386:MOV     AX, 03MOV     SP, BXPOP     BXRETFIS80486:DB      66HAND     AX, NOT 0DW      NOT 4DB      66HPUSH    AXDB      66HPOPFMOV     AX, 04MOV     SP, BXPOP     BXRETF
CPUTYPE ENDPCODE    ENDSEND     CPUTYPE