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From: root@mgbo.toppoint.de (Michael Goeckel)
Newsgroups: comp.sys.amiga.introduction
Subject: Re:  Is this the right place for "Idiot" articials
Message-ID: <root.3304@mgbo.toppoint.de>
Date: 15 Jan 91 23:12:38 GMT
Lines: 26

>In article <H112706.91Jan10113451@lehtori.tut.fi> h112706@lehtori.tut.fi (Herranen Henrik) writes:
>
>A slight correction: I have a Supra 8 meg expansion card with 6 megs
>populated. I don't know why, but somehow the expansion card makes the
>computer to believe that there are actually two expansion cards, one
>4 Meg and one 2 Meg. They are both autoconfig, but after the boot my
>A2000's largest contiguous memory hunk is 4 Megs.

This is AutoConfig concerning. While AutoConfig is done the OS ask the
Expansion PIC "How big are you" and depending of this the base
address is given. If your Supra would answer "6 Mega" and there isn't
as much room in the adress range it would receive a shut up and no memory
at all would be added. So it answers "4 Meg", enough place -> 4 Meg add.

Same for 2 Meg.

Also it is a little bit tricky to design a AutoConfig PAL that is capable
of base adress and size controling for 2, 4, 6 and 8 MBytes-ExpRam Pics.
Its easier to use two similar 2/4 MByte-AutoConfig PALs.
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