3108

This article is a stub. You can improve NDWiki by expanding it.

3108 PIOC/256 (Programmable Input Output Controller) is an ND-100 I/O card with four full duplex serial lines. The hardware is based on an MC 68000 CPU, four Z80 SIO and 256 kbyte ram. There is also a smaller version with only 128 kbyte ram.

Switches and indicators

The card has three thumb wheel switches numbered 3,2,1 from the top of the card. It has also three LED indicators, LD1 and LD2 red and LD3 yellow.

• thumbwheel (position 12J) - PIOC number switch
• thumbwheel (position 9J) - bank number (least significant)
• thumbwheel (position 7J) - bank number (most significant)
• LED 3 (yellow) - active memory cycle
• LED 1 (red) - MC 68000 reset
• LED 2 (red) - MC 68000 halt

Connectors

The A and B connectors are used for I/O, the C connector is used for the ND-100 Bus.

Reference

• Norsk Data Document ND–02.003.01 PIOC HARDWARE REFERENCE MANUAL
• Norsk Data Document ND–02.004.01 PIOC HARDWARE REFERENCE MANUAL ND-865-867
• Norsk Data Document ND–30.008.3 EN ND-100 Hardware Maintenance , page 246