lt530a.asm

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;p123 lt530A.asm(STDCALL)


        .MODEL SMALL

CHECKSUMD PROTO    STDCALL,A1:word,A2:word
        .STACK 256
        .DATA
COUNT   EQU 10
ARRAY   DB 12H,25H,0F0H,0A3H,3,68H,71H,0CAH,0FFH,90H
RESULT  DB ?
        .CODE
        .STARTUP

        INVOKE CHECKSUMD,COUNT,OFFSET ARRAY

        MOV RESULT,AL
        .EXIT 0

;-------------------------------------------

CHECKSUMD PROC stdcall USES BX CX,c1:word,a4:word
        MOV BX,a4
        MOV CX,c1
        XOR AL,AL
SUMD:   ADD AL,[BX]
        INC BX
        LOOP SUMD
        RET
CHECKSUMD ENDP
        END