1.4.1.7 - Norsk Data hardware - ND-500

Description

• The CPU controller #2 in the ND-500/2 CPU.
• This takes care of ND-100 communication, prefetch, micro clock, external arithmetic control.
• Typical position is #13 in the ND-500/2 crate.
• Print: C   ECO: R
• Print: J   ECO: R
• PCB size 405 x 280 mm, 4 layers
• Release date xx. xxx. xxxx

Chipset

• 04300A
• AM25LS2569 - 4 Bit Up/Down Counter x 8 pieces

LEDs

• LD2 (red) - Micro Info register bit 1
• LD1 (yellow) - Micro Info register bit 0
• LD3 (yellow) - The micro clock is running

Straps

• TP1
• TP2
• TP3

Switches

• None

Connectors

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