Epson Equity II Product Support Bulletin page 11

HDD Controller WD1002A-WX1 (8-bit)
Model number --------
Jumper
W1
W2
W3
W4
W5
W6
W7
W8
* No jumper pins - 1 and 2 are connected by a PCB board etch.
FACTORY SETTINGS
Position Description
Not used.
N / A
Not used.
N / A
BIOS ROM is enabled (on controller).
1 to 2
Device address 320H.
2 to 3
BIOS ROM size (32K or 64K).
* hard-wired 1 to 2
Reduced write current (< = 8 heads).
2 to 3
IRQ 5.
* hard-wired 1 to 2
Disk controller I. D. (set to be the first).
2 to 3
-- Extra jumper