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DDM INPUT ANYTHING SOURCE.txt
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2003-06-12
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*************************************
* *
* *
* DUNCAN'S INPUT ANYTHING *
* *
*THIS ROUTINE IS A SIMPLE MACHINE *
*LANGUAGE VERSION OF THE INPUT *
*ANYTHING SUBROUTINES. IT ALLOWS *
*THE ENTRY OF A STRING VARIABLE *
*WITHOUT CHECKING COMMAS, COLONS, *
*OR CONTROL CHARACTERS. A <RETURN> *
*TERMINATES THE ENTRY. *
* TO CALL FROM APPLESOFT BASIC, USE *
*THE FOLLOWING TYPE OF CODE: *
* *
*100 CALL 768,A$ *
* *
* THIS WILL CALL THE ROUTINE AT *
* $0300 (768.) AND RETURN THE *
* ENTERED STRING IN THE VARIABLE A$ *
* *
*************************************
*
*
*
CHKCOM EQU $DEBE ;CHECKS FOR COMMA
PTRGET EQU $DFE3 ;GETS VARIABLE NAME
CHKSTR EQU $DD6C ;SYNERR <> $
FORPNT EQU $85 ;VARIABLE PNTR
INLIN EQU $D52C ;INPUT TO BUFFER
BUFHI EQU $02 ;BUFFER = $200
BUFLO EQU $00
RTNCHR EQU $8D ;RETURN CHAR
MAKSTR EQU $E3E9 ;MAKE A STRING
SAVVAR EQU $DA9A ;SAVE A VARIABLE
*
* ROUTINE IS RELOCATABLE IF DESIRED
*
ORG $0300
*
*
*
JSR CHKCOM ;CHECK FOR COMMA
JSR PTRGET ;GET VARAIBLE ADDR
JSR CHKSTR ;MAKE SURE A STRING
STA FORPNT ;STORE ADDR OF
STY FORPNT+1 ;STRING FOR LATER
JSR INLIN ;GET INPUT STRING
LDA #BUFLO ;A,Y -> BUFFER FOR
LDY #BUFHI ;MAKSTR, X IS THE
LDX #RTNCHR ;END CHARACTER
JSR MAKSTR ;INPUT TO STRING
JSR SAVVAR ;MOVE TO VARIABLE
RTS ;ALL DONE, RETURN