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- CR EQU 13 ;Carriage return
- LF EQU 10 ;Line feed
-
- .MODEL SMALL
- .CODE
-
- PUBLIC CLEAR_SCREEN
- ;-----------------------------------------------------------------------;
- ; This procedure clears the entire screen. ;
- ;-----------------------------------------------------------------------;
- CLEAR_SCREEN PROC
- PUSH AX
- PUSH BX
- PUSH CX
- PUSH DX
- XOR AL,AL ;Blank entire window
- XOR CX,CX ;Upper left corner is at (0,0)
- MOV DH,24 ;Bottom line of screen is line 24
- MOV DL,79 ;Right side is at column 79
- MOV BH,7 ;Use normal attribute for blanks
- MOV AH,6 ;Call for SCROLL-UP function
- INT 10h ;Clear the window
- POP DX
- POP CX
- POP BX
- POP AX
- RET
- CLEAR_SCREEN ENDP
-
-
- PUBLIC GOTO_XY
- ;-----------------------------------------------------------------------;
- ; This procedure moves the cursor ;
- ; ;
- ; On entry: DH Row (Y) ;
- ; DL Column (X) ;
- ;-----------------------------------------------------------------------;
- GOTO_XY PROC
- PUSH AX
- PUSH BX
- MOV BH,0 ;Display page 0
- MOV AH,2 ;Call for SET CURSOR POSITION
- INT 10h
- POP BX
- POP AX
- RET
- GOTO_XY ENDP
-
- PUBLIC SEND_CRLF
- ;-----------------------------------------------------------------------;
- ; This routine just sends a carriage return-line feed pair to the ;
- ; display, using the DOS routines so that scrolling will be handled ;
- ; correctly. ;
- ;-----------------------------------------------------------------------;
- SEND_CRLF PROC
- PUSH AX
- PUSH DX
- MOV AH,2
- MOV DL,CR
- INT 21h
- MOV DL,LF
- INT 21h
- POP DX
- POP AX
- RET
- SEND_CRLF ENDP
-
-
- END