1.4.7.1 - Norsk Data - Floppy disc drives

Description

• TEAC floppy disc drive used in the OWS-12 Butterfly PC (Ericsson PC 1031)
• TEAC FD-55 GFV-17-U
• Replacement drive NEC FD1155C
• Capasity 1.2 MB
• Terminator resistor package (E3318) must only be present on last FDD in the chain, if more than one drive.
• Main PCB size 80 x 96 mm, 2 layers
• Release date xx. xxx. xxxx

Chipset

• TEAC BA6581K
• TEAC LH5060B

LEDs

• Access (red)

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

  TP1	Track 0 sensor
  TP2	ERASE gate
  TP3	The phase B magnetized period of the stepping motor
  TP4	INDEX
  TP5	Read data
  TP6	File protect sensor
  TP7	Pre-amplifier output signals
  TP8

Switches

• None

Connectors

• Floppy disc controller
• Power