1.4.1.7 - Norsk Data hardware - ND-500

Description

• Arithmetic in the ND-500/2 CPU.
• The usage of the SN74S558N IC is mentioned in the Monolithic Memories - LSI DATABOOK "as many as 34 parts used in one super-minicomputer (NORD-500 from Norsk Data). In an other chapter explaining floating-point multiply (IBM-long-format, 56 bits mantissa), as examples of computers using this format, we are listed together with mainframes as:
  • Cray
  • IBM S/360 and S/370
  • Amdahl 470
  • Data General Eclipse
  • NORD-500 :-)
• Typical position is #25 in the ND-500/2 crate.
• Print: C   ECO: D
• PCB size 405 x 280 mm, 4 layers
• Release date xx. xxx. xxxx

Chipset

• 09800A x 64 pieces
• AM25S558 or
  MMI67558 or
  SN74S558 - Multiplier x 28 pieces.

LEDs

• None

Straps

• None

Switches

• None

Connectors

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