SETNAM

Description:

This routine is used to set up the file name for the OPEN, SAVE or LOAD routines. The accumulator must be loaded with the length of the file name. The X and Y registers must be loaded with the address of the file name, in standard 6502 low-byte/high-byte format. The address can be any valid memory address in the system where a string of characters for the file name is stored. If no file name is desired, the accumulator must be set to 0, representing a zero file length. The X and Y registers can be set to any memory address in that case.

How to Use:

1. Load the accumulator with the length of the file name.
2. Load the X index register with the low order address of the file name.
3. Load the Y index register with the high order address.
4. Call this routine.

EXAMPLE:

       LDA #NAME2-NAME  ;LOAD LENGTH OF FILE NAME
       LDX #<NAME       ;LOAD ADDRESS OF FILE NAME
       LDY #>NAME
       JSR SETNAM
 NAME  .BYT 'FILE NAME'
 NAME2 ;