Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!mailrus!cornell!rochester!udel!mmdf
From: PBOURKE%IRLEARN.BITNET@cunyvm.cuny.edu (P_Bourke)
Newsgroups: comp.sys.amiga
Subject: speeding up bridgeboard
Message-ID: <15320@louie.udel.EDU>
Date: 12 May 89 18:04:25 GMT
Sender: mmdf@udel.EDU
Lines: 16

I have a Rev 3 and a Rev 4 A2088 Bridgeboard. I also have a Microsoft
Mach-20 80286 speedup card. When installed with the Rev 3 board the board
boots up but won't boot from A:. it also refuses to think that there is
more than 256 K installed.  The Rev 4 board does nothing bar display some
garbage characters.

Does the Rev 3's BIOS have 4.77 Mhz specific timings for accessing A:. Also
any suggests as to why it hangs the Rev 4 board.

The Mach 20 needs the 8088 removed and has a cable that goes into the chips
socket.

Finally can I replace the board's Crystal to increase the speed about 4.77Mhz

P.S. Why did Commodore design a 4.77 Mhz A0288 and not an 8 or 10 Mhz version
with an 8086 rather than 8088. Now that would be something :-)