Purpose: Serial - byte input
Call address: $FFA5 (hex) 65445 (decimal)
Preparation:
Registers: none Memory: system map Flags: none Calls: TALK TKSA (if necessary)Results:
Registers: .A = data byte Memory: STATUS ($90) Flags: none
Description: ACPTR is a low-level serial I/O utility to accept a single byte from the current serial bus TALKer using full handshaking. To prepare for this routine, a device must first have been established as a TALKer (see TALK) and passed a secondary address if necessary (see TKSA). The byte is returned in .A. (Most applications should use the higher-level I/O routines; see BASIN and GETIN).
EXAMPLE:
JSR $FFA5 ;input a byte from serial bus STA data