Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!apple!oliveb!amiga!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga
Subject: Re: 5 1/4" Floppy
Message-ID: <6408@cbmvax.UUCP>
Date: 28 Mar 89 19:56:10 GMT
References: <192@tlvx.UUCP> <611@jc3b21.UUCP>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Organization: Commodore Technology, West Chester, PA
Lines: 22

In article <611@jc3b21.UUCP> fgd3@jc3b21.UUCP (Fabbian G. Dufoe) writes:
>From article <192@tlvx.UUCP>, by sysop@tlvx.UUCP (SysOp):
>> I have the "real" 5.25" drive on my Amiga 1000, and also the Starboard II.
>> I cannot use the PC Utils to do a copy unless I get rid of all fast mem.
>> 
>> Er, I guess the "why" is that PC Utils doesn't work with expansion RAM....
>
>     Have you run a memory diagnostic against your expansion RAM?  I've had
>no trouble using the PC Utils with my Amiga 5.25" drive and expansion RAM.

	Well, it might be a side-effect of a bug in trackdisk.  RAWREAD/RAWWRITE
are used by PCUtils, and the raw r/w code in tracckdisk is broken, and accesses
an absolute memory location when checking the size of the request instead of
using an immediate.  SO whether it works becomes dependant on what's where in
memory.  NoFastMem changes where things are.  Note that if you have two or more
3.5" drives, NoFastMem isn't needed, since the track buffer ends up there, and
is always filled with large enough values that things work.

	This will be fixed in 1.4, it can't be fixed with setpatch (we looked).

-- 
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup