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From: yetsko@interlan.interlan.com (Mike Yetsko)
Newsgroups: comp.sys.tandy
Subject: Re: HELP!!!!!
Message-ID: <YETSKO.90Dec4133423@interlan.interlan.com>
Date: 4 Dec 90 18:34:23 GMT
References: <1990Dec2.185437.16693@isc.rit.edu>
Reply-To: yetsko@interlan.interlan.com
Organization: Racal InterLan, Inc., Boxborough, MA (1-800-LAN-TALK)
Lines: 20
In-reply-to: drj1736@ritvax.isc.rit.edu's message of 2 Dec 90 18:45:23 GMT

Depends on what memory board you have.  Is it a board with 64K chips, and 
you added a second board?  Or is it a single memory board with 256K chips
and a double row of pins for a header connector right near the card-edge
connector (i.e., a "PLUS" board)?

If it is a "PLUS" board, the jumpers are labeled 64/256 for the left, 
and 256/512 for the right.  I will have to check, but the left jumper is
for selection of 64K cs 256K RAM chips.  This was so Tandy could have a 
128K memory board for early HD system.  If you have 256K chips, then 
you can have either 256K or 512K, depending on if you have one or 2 rows
stuffed.  

If you were asking about the physical orientation all jumpers (you should
have little push on shorting blocks, NOT a wire jumper) is vertical as
the boards are plugged into the chassis.  

I have both boards as home, so I can check.  But what board(s) are you
working with, and what is on them?

Mike Yetsko