1.4.1.7 - Norsk Data hardware - ND-500

Description

• One of the four CPU slice's in the ND-500/2 CPU.
• Using six of the famous and versatile 74181 ALU chips.
• Using 20 pieces of RAM chips, 16 x 4 bits x 20 pieces (total 160 bytes).
• On the PCB version B there is one ECO that is not done very nicely.
• Typical positions are #19, #20, #21 and #22 in the ND-500/2 crate.
• Print: B   ECO: G
• Print: D   ECO: G
• PCB size 405 x 280 mm, 6 layers
• Release date xx. xxx. xxxx

Chipset

• SN74189 - SRAM x 20 pieces
• SN74181 - ALU x 6 pieces

LEDs

• None

Straps

• None

Switches

• None

Connectors

• Trace port

• (A) Standard ND-500 bus
• (B) Standard ND-500 bus
• (C) Standard ND-500 bus
• (D) Standard ND-500 bus