DMP Electronics eBOX-3350MX-AP Manual do Utilizador descarregar pdf (Página 111)

386SX Single Chip PC Jan Yin Chan Electronics Co.,LTD.

DM&P M6117D : System on a chip

Page 110

Jan Yin Chan Electronics Co,. LTD. M6117D 386SX Single Chip PC

8F-1,No.22,Wuchyuan 2RD.,Hsin Chuang city Taipei Hsien, Taiwan, R.O.C. Tel: 886-(02) 2298-0770 Fax: (02) 2299-1883

Example F: How to check M6117D hardware version.

; Please use TASM to compiler the following program.

; Execute under DOS environment.

;

.286

.model small

.code

Start proc c

mov ax,0c513h ; Unlock configuration register

call writechip

mov ax,0036h

call readchip ; Bit 2,1,0 = 010 b

and al,00000111b

cmp al,00000010b

je setflag

stc ; If Error return carry flag is 1.

jmp exitdos

setflag:

clc ; if OK return carry flag is 0.

exitdos:

mov ax,4c00h

int 21h

endp

readchip proc c

out 22h,al

nop

in al,23h

nop

ret

endp

writechip proc c

out 22h,al

nop

xchg ah,al

out 23h,al

nop

xchg ah,al

ret

endp

end

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