Cromemco PRI Rev B (020-0023) board ...

[Walt Perko]

Hi,

Does the board you have 74LS374 ICs or 74LS373 ICs ???  

This is supposed to be the PINOUTs for the 74LS373 board:  

J1 Pinout (Port 54h)

Pin Signal Direction
1 STROBE OUT
2 DATA0 OUT
3 DATA1 OUT
4 DATA2 OUT
5 DATA3 OUT
6 DATA4 OUT
7 DATA5 OUT
8 DATA6 OUT
9 DATA7 OUT
10 ACK IN
11 BUSY IN
12 PAPER END IN
13 SELECT IN
14 AUTO FEED OUT
15 ERROR IN
16 INIT OUT
17 SELECT IN OUT
18-25 GROUND —


Software access:

Port Function
54h OUT write data
54h IN read status


J2 Pinout (Ports 5A–5C)

Pin Signal Direction
1 DATA0 OUT
2 DATA1 OUT
3 DATA2 OUT
4 DATA3 OUT
5 DATA4 OUT
6 DATA5 OUT
7 DATA6 OUT
8 DATA7 OUT
9 STROBE OUT
10 BUSY IN
11 READY IN
12 RIBBON UP OUT
13 RIBBON DOWN OUT
14 CARRIER MOTION OUT
15-25 GROUND


Ports:

Port Function
5A OUT data
5A IN status
5B OUT carrier motion
5C OUT control strobes