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From: lgreen@pnet01.cts.com (Lawrence Greenwald)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: What Memory Chips for A2630??
Message-ID: <1636@crash.cts.com>
Date: 24 Feb 90 04:07:52 GMT
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Organization: People-Net [pnet01], El Cajon CA
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sutherla@qtp.ufl.edu (scott sutherland) writes:
 
  [A2091 related matter deleted]

>ONE LAST QUESTION::::
>
>	Can someone email me the answer to the following.  If I have
>the 1 meg RAM on the motherboard, 2 Megs on the A2091, and 4 Megs
>of 32-bit RAM on the A2630, which processor (68000 and 68030) can
>use which types of RAM and for what kinds of purposes?  For instance,
>if I use the 68030, can I use the 3 Mb of 16-bit RAM as a RAMDisk??
>CAN the '030 access the 16-bit RAM in a normal fashion?  If so,
>any performance degradation???   Can the 68000 use the 32-bit RAM?
>If so, how? (e.g. Ram disk, direct ram, etc.)  Since I know virtually
>nothing about how this different RAM is interrelated, a detailed 
>response would be appreciated.
If you boot the 68030, you have the memory on the 68030 board, the 2091 board
and the 1 meg on the motherboard (4 + 2 + 1 = 7 meg)

If you boot the 68000, it doesn't see the board in the co-processor slot and
thus, cannot access (AT ALL!!) the memory on the A2630. It will only see the
memory on the 2091 and the motherboard (2 + 1 = 3 meg).

I don't know directly about which memory is config'ed first (32/16 bit) so I
can't answer about where the RAM disk could/would be setup.

>
>
>Thanks,
>
>Scott Sutherland
>sutherla@qtp.ufl.edu

Larry Greenwald
 
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