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Summary of Contents for Western Digital WD1004A-WXI
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Page 1: Read This First
READ THIS FIRST INSTALLATION GUIDE WD1004A-WXl Winchester Disk Controller Board FEBRUARY 1989... -
Page 2: Identify Drive
IDENTIFY DRIVE The WD1004A-WX1 board works with any hard disk drive that has the ST506/412 drive interface and no more than 1024 cylinders and 16 heads. The Seagate 225 hard disk drive unit is such a drive. Look in your drive manual to verify that you have an ST506/412 MFM drive or check with your dealer. - Page 3 Only Memory. The BIOS ROM is a program on a computer chip that tells your computer how to operate devices attached to your computer. Some XT compatible computers do not operate with the Western Digital BIOS ROM because of an incompatibility. Most of these computers are listed in Ap- pendix A.
- Page 4 FIGURE 1-1 WD1004A-WXl CONNECTOR AND JUMPER LOCATIONS...
- Page 5 FIGURE 2-1. DAISY CHAIN CABLE CONNECTIONS 2–5...
- Page 6 W19 & W20 selects factory drive tables for the second hard disk W21 and W22 select the controller and BIOS address ranges R23 enables or disables the Western Digital BIOS ROM on the WD1004A board W25 and W26 always OUT...
- Page 7 Default Values Tables B-1 through B-4 list the jumper settings. Default factory settings are marked with a “†” symbol. Table B-1. Pre-selected Drive Tables Table First Drive Second Drive Capacity Heads Cylinders Number W17 W18 W19 W20 21MB 10MB 10MB †...
- Page 8 Table B-3. Select BIOS ROM Select BIOS disable Western Digital BIOS (allows external BIOS selection) † enable Western Digital BIOS (selects internal BIOS) Table B-4. Select Hardware Interrupt (IRQ) Select IRQ selects IRQ2 † selects IRQ5 B–3...
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