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From: alexhagn@neabbs.UUCP (ALEXANDER HAGEN)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: NEC V20 chip
Message-ID: <417935@neabbs.UUCP>
Date: 10 Jul 90 19:25:57 GMT
Organization: NEABBS multi-line BBS +31-20-5733533 (13x), Amsterdam, Holland.
Lines: 27

castorca@EA.USL.EDU (Christian Castor) wrote:

>I have an A2088 bridgeboard. Someone told me that if I took
>out the Intel 8088 chip from the BB, and replace it with
>a NEC V20 chip (5 MHz), the board would increase its 
>speed a little bit. 

>   I got two V20 chips mail order, and neither worked. When
>I plug in the V20, the BB boots, but it reports that there
>is an error in a 64K RAM address. After that, the entire
>system freezes.  When I replaced the Intel 8088, everything
>ran OK.

>Anyone knows the cause of this problem?

Well, nobody knows why this happens. Even Commodore doesn't know, according
to a Dutch Amiga magazine. The NEC V20 seems to detekt things that aren't
there. For this reason Commodore advises Amiga users against using the
NEC V20 on the Bridgeboard. To bad you didn't knew about this before :-(.
On the other hand, there are Bridgeboard accelerators from Germany that
use the NEC V20 (8 Mhz) and some additional hardware to speed things up.

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