ASUS 40X CDROM will not read CDR disks

[cbd...@my-dejanews.com]

I recently installed an Asus 40x CDROM drive (CD-S400) in a friend's PC.

Although it reads 'ordinary' CDs OK, it wouldn't read silver-blue CDR disks.
It spins-up and then repeatedly speeds up and down as it tries to read the
disk - eventually it times out with a blue screen. At one point I got a
listing of the CDR's root menu in Windows Explorer, so the drive is obviously
*capable* of reading CDRs.

The PC was a 2-3 year old Pentium 100 with the 'first' version of Windows 95,
so there's no UDMA bus mastering going on, and there are no drivers specified
in the autoexec.bat or config.sys files.

Has anyone encountered this problem before or has a fix for it?

Is there any way to slow down the drive in case this improves its chances of
being able to read CDR disks ?

P.S. I've just had a phone call from him, and it looks like he *may* have
discovered an 'ordinary' CDROM disk which the drive won't read either!

Colin

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[hammy]

Have you tried the Asus 40x DOS cdrom driver ??
Try putting a line for it in config.sys and use the command
option to turn On PIO/ turn off UDMA drive support as the CDrom
may be attempting UDMA transfers even though the controller
doesn't support it. Put the file ASUSCD.SYS in root of C:\
Get the zipped file from:
ftp://ftp.asus.com.tw/pub/ASUS/Drivers/DRV140.ZIP

modify CONFIG.SYS by adding the following line:

Try this one IN CONFIG.SYS:
Device=C:\ASUSCD.SYS /D:MSCD1 /PIO

or try: Device=C:\ASUSCD.SYS /D:MSCD1 /PIO3

And put this in Autoexec.bat:
MSCDEX.EXE /D:MSCD1

--------------------------------
From Asus:
Device=<Target Path>\ASUSCD.SYS /D:<Device Name> /<Transfer Mode>

<Target Path>: The path that the CD-ROM driver is installed to.
The default path is "C:\ASUS_CD".

<Device Name>: The name of your CD-ROM device driver,
"ASUSCD01" is used by default.

<Transfer Mode>: The CD-ROM data transfer mode. If not specified,
PIO mode will be used. Theree transfer mode are available:

PIO: PIO transfer mode.
DMA: Mult-word DMA transfer mode.
UDMA: Ultra DMA transfer mode.