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- Path: peer-news.britain.eu.net!uknet!bhamcs!news
- From: Philip Brayshaw <pxb@cs.bham.ac.uk>
- Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Re: Can i add a MATH-CO to an A1200 mother board?
- Date: Thu, 14 Mar 1996 14:39:16 +0000
- Organization: School of Computer Science, The University of Birmingham, U.K.
- Message-ID: <31482F94.1A21@cs.bham.ac.uk>
- References: <4hv5qg$pqn@cloner2.ix.netcom.com>
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- Ken Nipper wrote:
- >
- > yes, yes i know i can buy and add on card, but there seems to be an
- > empty surface mount space that looks like it was intended fort a
- > soldered in math-co '882. does any one know about this? i'll solder
- > one in mine, if it's possible.
- >
- > troy
-
- I seem to remember an article about the 1200 when it was released
- suggesting that it should be possible, BUT try a 68881 cos' the '882 was
- designed to work with the '030 and the '881 with the '020. Also, there
- is nowhere to fit the extra clock crystal (needed to make the FPU run at
- a different speed from the CPU), so the '881 would have to run at 14MHz,
- although I think a 16MHz '881 would do (as the '020 in a 1200 is a 16Mhz
- chip that is slowed to 14MHz because of the video bus or something....)
-
- I think the empty space was there 'cos C= intended to sell some 1200's
- with a 68881 fitted, but never got round to it.....
-
- Phil.
-