Appendix A
Command Summary
Command Code Description
Bit Set An Set bit n (1 thru 40)
Bit Clear Bn Clear bit n (1 thru 40)
Bus Output G0 Input and Output port data sent on talk
G1 Only Input port data sent on talk
G2 Only Output port data sent on talk
Configure C0 All ports are inputs
C1 Port 1 is an output, ports 2 thru 5 are inputs
C2 Ports 1 and 2 are outputs, ports 3 thru 5 are inputs
C3 Ports 1 thru 3 are outputs, ports 4 and 5 are inputs
C4 Ports 1 thru 4 are outputs, port 5 is an input
C5 All ports are outputs
Data Dn..Z Data to be outputted is entered after "D" and
terminated by "Z"
Data Ready R0 Data is read when system is addressed to talk
R1 Data is latched on EDR transition
EOI K0 EOI enabled
K1 EOI disabled
Execute X Execute preceding command string
Format F0 ASCII Hexadecimal
F1 ASCII Character
F2 ASCII Binary
F3 ASCII Decimal
F4 Binary
F5 High Speed Binary
Handshake H0 Pulse the Clear line
H1 Pulse the Strobe line
H2 Pulse the Trigger line
Inhibit Q0 Clear Inhibit line
Q1 Set Inhibit line
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