Purpose: Send an UNTALK command
Call address: $FFAB (hex) 65451 (decimal)
Communication registers: None
Preparatory routines: None
Error returns: See READST
Stack requirements: 8
Registers affected: A
Description: This routine transmits an UNTALK command on the serial bus. All devices previously set to TALK will stop sending data when this command is received.
How to Use:
EXAMPLE:
JSR UNTALK