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From: peck@ral.rpi.edu (Joseph Peck)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: What Happens If You Have > 9 Meg??
Message-ID: <TF3^-H#@rpi.edu>
Date: 16 Jan 91 15:47:14 GMT
References: <6931@crash.cts.com> <744@cbmger.UUCP>
Organization: Rensselaer Polytechnic Institute, Troy NY
Lines: 46
Nntp-Posting-Host: ral.rpi.edu

In article <744@cbmger.UUCP> peterk@cbmger.UUCP (Peter Kittel GERMANY) writes:
>In article <6931@crash.cts.com> lgreen@pnet01.cts.com (Lawrence Greenwald) writes:
>>I've always been curious about the 9 Meg limit on the 2000. What would happen
>>if I were to have more than 9 meg in the machine, say in one of the following
>>combinations:
>>
>>1)   1meg motherboard memory
>>     2meg A2052 card
>>     8meg GVP Series II w/RAM
>>   ---
>>    11 meg physical RAM
>>
>>2)   1meg motherboard memory
>>     8meg GVP Series II w/RAM
>>     4meg 32-bit memort (A2630)
>>   ---
>>    13 meg physical RAM
>>
>>What would happen? Machine refuse to boot? Software go crazy?
>
>Everytime the last card in the row would refuse to autoconfig.
>Its memory simply wouldn't show up. For Autoconfiguration,
>the system only has the 8 MB pool of address space and when a
>certain board doesn't fit into this space or its remainder then
>it will not get activated.

True enough for case 1, but for case 2 isn't the 4meg memory on the
card in the CPU slot?  Since I am 99.9999% sure of this (okay Dave,
make me look silly now :), the only intelligent place to place
this memory in the address space is outside of the 16meg limit of
the 68000.  This is especially true since I vaguely remember Dave
mentioning that there are sufficient address lines for up to 64meg
of 32 bit ram..... 

So, the end result (assuming that I am correct :) is that it is
quite easy to put 13 megs in a 2000.....
 
>
>-- 
>Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 
>Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk

Joe Peck
peck@ral.rpi.edu

An Amiga Engineer wanna'be....