1.4.7.1 - Norsk Data - Floppy disc drives

Description

• NEC floppy disc drive used in the OWS-12 Butterfly PC (Ericsson PC 1031)
• NEC FD-1155C
• Replacement drive TEAC FD-55
• Capasity 1.2 MB
• Terminator resistor package (pos. RN1) must only be present on last FDD in the chain, if more than one drive.
• Main PCB size 124 x 194 mm, 2 layers
• Release date xx. xxx. xxxx

Chipset

• FDN101
• MC2871A

LEDs

• Access (Yellow)

Straps

• Default ND jumper settings as used in the OWS-12:

  DC/RY		Closed		O=O		O
  DS0		Open		O  O
  DS1		Closed		O=O
  DS2		Open		O  O
  DS3		Open		O  O
  FG		Open		O  O
  HG		Closed		O		O=O
  HL		Open		O  O
  IU		Open		O  O
  LG		Closed		O=O		O
  ML		Open		O  O
  RE		Open		O  O
  U1		Open		O  O
  U2		Closed		O=O
  XT		Open		O  O

• TP - Test Points

  G	Test point ground, two places
  TP1
  TP2
  TP3
  TP4
  TP5
  TP6
  TP7
  TP8

Switches

• None

Connectors

• Floppy disc controller
• Power