47 lines
591 B
NASM
47 lines
591 B
NASM
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NAME DUMPMCB
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TITLE DUMPMCB -- Dump Memory Control Block (MCB) Chain
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CODE SEGMENT
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ORG 0100h
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ASSUME CS:CODE, DS:CODE, ES:CODE, SS:CODE
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START:
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INVARS:
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MOV AH, 52h
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INT 21h
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JC ERROR
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DB 26h ; ES:
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MOV ES, [BX-2]
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MCBNEXT:
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CALL SHOWMCB
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CMP [ES:0000], BYTE PTR 'Z'
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JZ EXIT
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MOV AX, ES
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ADD AX, [ES:0003]
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INC AX
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MOV ES, AX
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JMP SHORT MCBNEXT
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EXIT:
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XOR AL, AL
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ERROR:
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MOV AH, 4Ch
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INT 21h
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SHOWMCB:
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PUSH ES
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POP DS
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CLD
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XOR SI, SI
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MOV CX, 16
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MOV AH, 02h
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SHOWLOOP:
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LODSB
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MOV DL, AL
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INT 21h
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LOOP SHOWLOOP
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RET
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CODE ENDS
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END START
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