FCB unavailable

汤凯旋

data segment
MA DB 10
LEN  DB ?
buffer db 10 dup(0)
data ends
assume cs:code,ds:data
code segment
start:
     mov ax,data
     mov ds,ax
     LEA DX,MA
     mov ah,0ah
     int 21h
     mov cx,0h
     mov cl,len
     lea bx,buffer
again:mov al,[bx]
      sub al,30h
      cmp al,9
      jbe l5
      CMP AL,16H
     JBE L6
      SUB AL,27H
      JMP L5
      
L6: SUB AL,7H
   
l5: mov [bx],al
    inc bx
    loop again
  LEA BX,BUFFER
  MOV AH,[BX]
INC BX
MOV AL,[BX]
MOV CL,4
SHL AH,CL
XOR AH,AL
MOV DH,AH
INC BX
MOV AH,[BX]
INC BX
MOV AL,[BX]
SHL AH,CL
XOR AH,AL
MOV DL,AH
MOV BX,DX
MOV DX,0H
MOV CX,16
NEXT:SHL BX,1
JC ONE
MOV DL,30H
JMP EXIT
ONE:MOV DL,31H
EXIT :MOV AH,21H
INT 21H
DEC CX
JNZ NEXT

    mov ah,4ch
    int 21h   
    code ends
    end  start
      
debug   调试时出现  FCB unavailable        Abort, Fail?

565123

http://support.microsoft.com/kb/95877/en-us

看看吧