Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!ulowell!cbmvax!adam
From: adam@cbmvax.UUCP (Adam Levin CATS)
Newsgroups: comp.sys.amiga
Subject: Re: Memory Expansion
Keywords: A2000, jumper table
Message-ID: <5373@cbmvax.UUCP>
Date: 30 Nov 88 16:18:11 GMT
References: <85@sns.UUCP>
Reply-To: adam@cbmvax.UUCP (Adam Levin CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 27


Concerning the use of an A2000 1 Meg RAM Expansion card in a B2000:
on some B2000s it works, on others it doesn't.  No guarantees.

The (J1) jumper pins are on the component side of the board and are numbered:

            ~
            |
            |          2   4   6   8  10
            |          .   .   .   .   .
            |          .   .   .   .   .
            |
            |          1   3   5   7   9
            |
            ~
            ~
            |
            +---------------------------------
                                              |_|_|_|_|_|_|_|_|_

For 512K of RAM (top row empty) short pins 3-4, 5-6, & 7-8 with 3 jumpers.
For 1M of RAM (top row filled) short pins 3-4 & 9-10 with 2 jumpers.

I personally have not been able to get more that 512K to work, but
I think I have a bad RAM chip.

	== Adam