Universal interface for PC AT keyborard.
Supports following models:
ZX Spectrum - port #FE,
Sam Coupé - 3 extra key columns in #F9 port and 1 row in #FFFE port,
Byte - 2 extra key columns in #FE port (bits 5 and 7),
Elwro 800 Junior - 2 extra key columns in #FE port (bits 5 and 7) and 2 rows in #FF7F and #FFFB ports,
Purposes and possibilities:
PC AT keyboard conversion.
PC Mouse to Kempston Mouse conversion.
PC Mouse to Sam Mouse conversion.
Programmable line interrupts as in Sam Coupé.
Programmable keyboard layouts: stored in serial EEPROM,
can be reprogramed from computer or the chip can be replaced.
Macro keys - even large BASIC programs can be entered
with one key press.
The mouse port can be used also for RS232 serial
- AT keyboard interface for ZX81 by Kai Fisher.