40 Meg Hard Disk Card  (250-4059A)       Settings       Faxback Doc. # 3041

The 25-4059/A Uses the WD1002-27X controller and looks alot like the 20 meg
controller board. This controller is an RLL and not a MFM style controller,
the jumpers in some places do different things.

SETTINGS FOR TANDY 1000 /A /SX /TX

    W3  jumpered      Enable 64K BIOS ROM
    W4  2-3           I/O port 320
    W5  unused        Trace between 1 and 2 is installed
    W6  1-2           RWC disable
    W7  2-3           IRQ 2, S1-7 must be on
    W8  2-3           BIOS address C800Hex
    W9  off           No translate mode

    S1-6              Jumped ALWAYS!!!
    S1-7              IRQ 2, W7 must be jumped 2-3

All other jumpers on S1 are open (off)

SETTINGS FOR TANDY 1200 1000 SL SL/2 TL TL/2 

Are the same as for the 3000/4000 series computer except for S1-8 should be
off (off=XT style computer).  *SEE BELOW

SETTINGS FOR TANDY 3000/4000

    W3  jumpered      Enable 64K BIOS ROM
    W4  2-3           I/O port 320
    W5  unused        Trace between 1 and 2 installed
    W6  1-2           RWC Disable
    W7  1-2           IRQ 5, S1-7 must be off
    W8  2-3           BIOS address C800Hex
    W9  off           No translate mode

    S1-6              Jumped ALWAYS!!!
    S1-8              Jumped = AT class computer

* S1-8           off = XT style computer

All other jumpers on S1 are open (off)

Installation Note: Recommended expansion slot closest to power supply and


information on media map (bad cylinders and heads) should be documented
(written down) prior to install.

(dkh-08/06/93)