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From: DXB132@psuvm.psu.edu
Newsgroups: comp.sys.amiga.hardware
Subject: Re: PAL grounding mod for A1000, multi-serial board
Message-ID: <91050.142519DXB132@psuvm.psu.edu>
Date: 19 Feb 91 19:25:19 GMT
References: <ben.4958@epmooch.UUCP>
Organization: Penn State University
Lines: 21

In article <ben.4958@epmooch.UUCP>, ben@epmooch.UUCP (Rev. Ben A. Mesander)
says:

>I've built the two-port version of the multi-I/O board in the Feb. Amazing
>computing. When I try to boot with it installed, DF0: runs erraticaly,
>flashes its LED on and off, double-steps, chatters, etc. In the directions
>to the board, it says if this happens, I need the A1000 PAL grounding mod.

Well, it says that grounding your PALs help in general whenever you add
anything to your A1000. However to really solve your problem you need to
run additional power and ground lines (as described in the manual) to the
board. This is should reduce or eliminate the problem. (Grounding PALs
will help, to be sure, but it's not the major problem).

Now my own question: Is there a CMOS version of the 6526 or 8520 ??
Would it help reduce noise problems?

-- Dan Babcock

[I don't have the PAL grounding docs handy; hopefully someone out there
does!]