Apollo 150 III, 120 III user manual Digital I/O Programming, Example

User Manual version 2305

The Digital I/O is of TTL interface. It is controlled via software programming.

Digital I/O Programming

Input/output address:		208H
In_Data 0~3=SD0~SD1
Out_Data 0~3 SD4~SD7
EXAMPLE:
10	REM Digital I/O example program
20	X = INP (&H208)	REM INPUT Digital I/O port
		for 4 bit
30	X = OUT (&H208)	REM OUTPUT Digital I/O port
		for 4 bit

60END

100Return

Port 208H Definition

APOLLO 120/150 III 4-49