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echo: virus_info
to: MARK GAULTON
from: PETER LOUWEN
date: 1997-04-04 21:12:00
subject: Re: FDD Problems

 -=> Quoting Mark Gaulton to All <=-
 MG> Immediately after that, the 1.44 FDD stopped reading 1.44 and only
 MG> acted as a 720.  Around the same time, I was trying to transfer files
A long shot, but perhaps the CMOS was altered:
CMOS 10h - IBM - FLOPPY DRIVE TYPE
Note:   a PC having a 5 1/4 1.2 Mb A: drive and a 1.44 Mb B: drive will
          have a value of 24h in byte 10h. With a single 1.44 drive: 40h.
Bitfields for floppy drives A/B types:
Bit(s)  Description     (Table C007)
 7-4    first floppy disk drive type (see #C008)
 3-0    second floppy disk drive type (see #C008)
(Table C008)
Values for floppy drive type:
 00h    no drive
 01h    360 KB 5.25 Drive
 02h    1.2 MB 5.25 Drive - note: not listed in PS/2 technical manual
 03h    720 KB 3.5 Drive
 04h    1.44 MB 3.5 Drive
 05h    2.88 MB 3.5 drive
 06h-0Fh unused
Peter
... I'm not rude, I'm diplomatically challenged.
--- EBO-BBS Diemen - NL
---------------
* Origin: EBO-BBS Diemen (http://www.worldonline.nl/~biginski) (2:280/901)

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