1.4.1.5 - Norsk Data hardware - ND-100

Description

• Disc controller for connecting one or two ST-506 (AT) discs. ND was using Micropolis 1304 formated as 23MB or 45MB and Micropolis 1325 formated as 28MB, 45MB or 74MB.
• Using 4 piece of FIFO buffer chips, 16 x 4 bits x 4 piece (total 32 bytes).
• Print: B   ECO: L
• Print: E   ECO: L
• Print: J   ECO: L
• Print: K   ECO: L
• PCB size 367 x 280 mm, 4 layers
• Release date 12. Jan. 1987

Chipset

• 300012 PROM
  • Microprogram 01200B
• 9403 - FIFO x 4 pieces
• AD558 - DAC

LEDs

• LD7 - ?? (yellow)
• WCO on (yellow): See switch in position J15
• LD1 - Read (yellow)
• LD2 - Write (yellow)
• LD3 - Parity (yellow)
• LD4 - Compare (yellow)
• LD5 - Active (yellow)
• LD6 - Error (red)

Straps

• None

Switches

• SW1 (J15) - Switch the WCO (Write preCOmpensation) on/off
• TH1 (J9) - Device number (missing entries are illegal):
  

  No.	Device name	Device no.	Ident.	Log. dev. no.
  0	Disk system 1	500B	1B	1224B
  1	Disk system 2	510B	5B	1231B

Connectors

• (A) Control lines
• (B) Data lines
• (C) Standard ND-100 system bus