On Oct 11, 10:46, Zane H. Healy wrote:
> Subject: Re: RQDX2 & 3 jumpers
> Bruce Lane spoke:
> > I've posted jumper and cabling details of the RQDX2 and RQDX3 to my
web
> Great! This answers some of my questions. Now to show what an ingrate I
> am, does anyone have any info on the following jumpers:
>
> W12..W17
These set the starting "logical unit number" for board, as a binary number
(W12=LSB, W17+MSB). If you have multiple RQDXn boards, you'd typcally set
the second card to start with LUN 4, the third with LUN 8, etc. Jumper out
= 0, jumper in = 1.
> W23 -- I think this is for what kind of cabinet that the card is
in.
No, it controls the HEADSEL 3 and REDUCWRTI signals. W23 has 4 posts
numbeerd 1..4. Factory setting is 1-2 jumpered on early firmware, 1-2 and
3-4 for version 2 firmware (ROMs 23-243E5/23-244E5) or later.
Alternatively, you can jumper 2-3, which has the effect of connecting
HEADSEL 3 to pin 9 of J1, and REDUCWRTI to pin 22. That allows you to use
hard drives with more than 8 heads.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Sun Oct 11 1998 - 14:06:10 BST