• Part: WD1004-27x
  • Description: Winchester Disk Controller Boards
  • Manufacturer: Western Digital
  • Size: 88.24 KB
WD1004-27x Datasheet (PDF) Download
Western Digital
WD1004-27x

Key Features

  • These boards are described below
  • Also the WD1004-27X board can be used as a secondary controller
  • The WD1004A-27X board cannot be used as a secondary controller
  • DAISY CHAIN CABLE CONNECTIONS 2–5 B JUMPERS The WD1004 board has a row of jumper pins at W17 to W22 and W25 to W28
  • The WD1004A board has a row of jumper pins at W25 to W28
  • Jumper Functions (W17 to W22, R23, and W25 to W28) The following list explains the jumper functions
  • B–1 Default Values Tables B-l through B-5 list the jumper settings
  • Default factory settings are marked with a "†" symbol
  • Select BIOS ROM R23 Select BIOS in out† selects external BIOS selects internal BIOS Table B-4
  • Select Sectors and Configuration Option W25 W26 Table Sectors Translate in† out out in RLL RLL 17 26 yes no Dynamic no yes Table B-5