Need Shugart 851 manual

From: Joe <rigdonj_at_cfl.rr.com>
Date: Tue Mar 5 10:25:23 2002

At 07:46 AM 3/5/02 -0700, you wrote:
>see below, plz.
>
>Dick
>
>----- Original Message -----
>From: "Joe" <rigdonj_at_cfl.rr.com>
>To: <classiccmp_at_classiccmp.org>
>Sent: Tuesday, March 05, 2002 6:50 AM
>Subject: Re: Need Shugart 851 manual
>
>
>> At 04:31 PM 3/4/02 -0700, Richard wrote:
>> >I'd advise you to pursue this from the controller end, initially.
>>
>> Good idea. Unfortunately the card connector is numbered 1-100 with odd
>> numbers on one side and even one the other (exactly same as S-100). But
>> it's connector is numbered A1 through A50 on one side and B1 through B50 on
>> the other. It makes things confusing! It's not something that you should
>> do when you're tired!
>>
>
>Agreed ... I'm having a little trouble with that one myself ... there are
only
>25 pairs on the cable.

  There are (or can be) 100 wires per cable.

 What do they do with the numbers greater than 25 on
>one side and 50 on the other?

   There are 50 contacts per side. All the odd numbered wires are on the A
side and all the even numbered ones are on the B side. But here's one place
that it gets very weird, A1 is pin 99 and A50 is pin 1 !!! The same thing
happens on the B side, B1 is pin 100 and B50 is pin 2!

   I came up with a couple of formulas to help figure out the wire numbers.
Wire # for contact Ax is (51-x)*2 and the wire # for contact Bx is
((51-x)*2)-1. I *think* that's right! it was late when I was working on it.


>
>Perhaps you'll want to give up on using th '85x's on the Intel box and use
>80x's instead. There will be a cleaner path for you to follow, though,
>clearly, it won't be totally obvious.

   I would use 800s if I had any but it seems like all I can find are 85xs
:-/ I've got two extra 800s but they've been out in the weather and they
look nasty!

   Joe

>
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Received on Tue Mar 05 2002 - 10:25:23 GMT