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From: cramer@kontron.UUCP (Clayton Cramer)
Newsgroups: net.micro.pc
Subject: Re: NEC V20 How to How to USE?
Message-ID: <1102@kontron.UUCP>
Date: Tue, 30-Sep-86 14:19:59 EDT
Article-I.D.: kontron.1102
Posted: Tue Sep 30 14:19:59 1986
Date-Received: Thu, 2-Oct-86 21:10:33 EDT
References: <1500065@iuvax> <6200047@inmet> <1091@kontron.UUCP> <208@csustan.UUCP>
Organization: Kontron Electronics, Mt. View, CA
Lines: 29

> In article <1091@kontron.UUCP> cramer@kontron.UUCP (Clayton Cramer) writes:
> >
> >DISKCOPY and FORMAT both require that the processor run at 4.77 MHz.
> >(Timing dependencies involving the disk controller.)  The FAST88 kit
> >I have gives you a switch to go back to 4.77 MHz for this exact reason.
> >
> >Clayton E. Cramer
> 
> Gee, my pclone, which supposedly runs at 8mhz (norton says 1.6 relative
> speed, haven't done the math yet) runs diskcopy and format perfectly
> fine....in fact, all my utilities (and all my software for that matter)
> work fine.  Good thing, too, because I'd have to move a jumper on my
> motherboard if I wanted to take it down to 4.77.  Has anybody had
> a problem with diskcopy and format not working at 8mhz?
> 
> /*  Chris Rhodes / Shooting Shark
>  *  Currently cowering behind lll-crg!csustan!guest
>  *  real uucp : lll-crg!csuh!shark -or- lll-crg!ptsfa!harlie!shark
>  *  My opinions *are* those of csustan!  Yeah, they made me spokesman, ah,
>  */ president of the university!  Yeah, *that's* the ticket!

Well, to be more precise, the BIOS of the IBM PC/XT has a problem running
DISKCOPY and FORMAT at speeds other than 4.77 MHz.  I've been most recently
fighting with a clone called Terminator LT that uses a 286 but an XT-like
BIOS (in fact, the serial I/O BIOS code is a copyright infringement on IBM -- 
I'm glad I didn't buy it) and runs at 10 MHz -- and can't FORMAT floppies!
(The company JUST discovered it and is issuing BIOS ROM upgrades!)

Clayton E. Cramer