; This file is a specialized form of filter to change any EOF codes
; in a text file into spaces so they are readable by XYWrite

inpchar
	mov bx, 0	;stdin
	mov cx, 1	;read 1 byte
	mov ah, 3fh	;read file/device function
	mov dx, offset inbuff
	int 21h
	or ax, ax	;zero means no characters read
	jz eof

	mov al, inbuff	;get character read
	cmp al, 1ah
	jne norep
	mov al, 20h

norep
	mov outbuff, al
	mov bx, 1	;stdout
	mov cx, 1	;write one byte
	mov dx, offset outbuff
	mov ah, 40h	;write file/device function
	int 21h

	jmps inpchar

eof
	mov ah, 4ch
	int 21h

inbuff	db '1'
outbuff	db '2'