#Mitsumi CDROM drive
8 messages in this thread
Re: Misumi LU005S CDROM drive
I wonder if anyone can help out with a rather odd installation
problem. My drive works on CDROMs, but won't play audio disks!
I haven't tried MPC or Photo-CD disks yet.
The drive is a CRMC-LU005S model manufactured in January 1993.
It comes set up for DMA channel 5 and IRQ channel 10 as the
defaults. So far as I know, these are not used by any other
components in my system. The drivers MTMCDE.SYS and MTMCDS.SYS
are version 2.10, dated 27th October 1992. The MIcrosoft CDROM
Extension driver, MSCDEX.EXE, is version 2.21 dated 4th February
1992. I am using extended memory for the MTMCDE.SYS buffers, and
expanded (QEMM v6) memory for the MSCDEX.EXE buffers. These are
the only available options (apart from conventional memory). Both
drivers are loaded low. My PC is a 40MHz 386DX with 10Mb RAM,
AMI BIOS, and a Trident T8900 SVGA card.
If I issue commands via PLAYCD.EXE (v1.30, dated 16th January
1992), there is a lot of disk activity, including stops and
starts, but no audio from either the rear output RCA jacks or the
front panel headphone socket. If I call the PLAYCD control panel,
it won't go away once it appears on screen, and I have to reboot to
remove it. The status indicator reads `Setup …' for several
minutes, followed by `Stopped'. Pressing play, rewind, etc.,
makes no difference.
The CDROM drive also seems very slow. It takes 1-2 MINUTES to
get a directory listing with the DOS (Microsoft, v5.00) DIR
command, and several minutes to load the CDROM software that I
was trying out. Once it gets going, it appears OK though.
Has anyone got any ideas? Are these loading times normal?
Sreten.
Sreten — the loading times, and the time for the dir listing are NOT normal.
Sure, CD-ROM takes more time — but not THAT much more time — and my 5s is
only slightly slower on a dir listing than for a floppy. I would bet that you
have a memory conflict or your parameters for MTMCDE or MSCDEX don't match the
jumper settings on the card. For a while, mine would play CD's, and do MM
Beethoven — but nothing else. — I had changed the jumper setting, but
neglected to make the change in MTMCDE –. Check the card, and be sure the
/I,/P and /T parameters are correct — also, of course, be sure the /A
parameter is correct.
Craig
Craig — thanks for your advice. My problem was due to some sort of
I/O port conflict. I thought this was likely because the same diff-
iculties occurred with software polling (where you don't need to specify DMA
and IRQ channels). The Mitsumi also functioned correctly (using the default
settings) in a colleague's machine which had very similar specs to mine, but
which came from a different source.
I tried changing the I/O address (/P switch of MTMCDE.SYS) from the
300h default to 310, and after making the appropriate dip switch adjustment,
everything seems fine.
Is there a utility that you can use to check for vacant I/O, DMA,
and IRQ addresses before installing adapter boards? I don't relish
the prospect of all this hassle each time I install something (I am
hoping to try a SoundBlaster Pro board next). I did find a little program
(PCK.EXE or something like that) which looks at potential I/O addresses for a
Hitachi CD-ROM adapter card. It only looks at a narrow address range
(200h-370h). Also, while it correctly spotted that 300h on my machine was
being used, it wasn't able to see the
Mitsumi card at 310h.
Sreten
I just installed a Mitsumi with the default settings and the drive worked fine
but both my floppy disks don't wok. I get Data Error Reading. The seem to spin
up ok, but it won't read them with the Mitsumi controller in the system. My
system manual says they use DMA Ch2 and the Mitsumi is using 5 and IRQ 10 as a
default. Any ideas?
Larry — I'm probably not the best person to advise you on CDROM
installations, since I've only had my Mitsumi since last Thursday,
and it's my first CDROM product. However, it seems that you do
have a conflict somewhere. You might like to install the soft-
ware polling driver MTMCDS.SYS, which does not require DMA or IRQ
channels to be set. This is an experiment you can try without
opening up your PC. If it works, you will have to try changing
the DMA and IRQ values (if you want the improved performance offered
by the hardware driver MTMCDE.SYS). If it doesn't work, then you
most likely have an I/O port conflict.
In this case, the SETUP program provided by Mitsumi offers five
suggested I/O addresses (manual, page 25), and you might like to
try an alternative to the default 300h. It is probably easier just
to change the parameters in CONFIG.SYS with a text editor than to
reinstall. You will have to adjust the little bank of switches on
the adapter card (SW1) as well: the settings are in the manual
(page 13). This is all quite straightforward, unless you have a
lot of adapter cards in your PC.
Good luck!
Sreten
There are utilities the claim to be able to identify I/O address. DMA ports
etc. that are in use, but I have found that they are less than perfect. Your
best bet is to make a record of what each card uses per the cards documentation
and keep a current printout handy.
Bruce
Sreten — Glad you got things operating. I'll bet that there are utilities
that can check each port, for example, to find if there is anything there, and
IO as well, but I don't know what they are. Can some of the lurkers help out?
Craig
Sreten,
Checkit 3.0 will give you that information. I use it all the time when
installing stuff. I have my Ethernet card on IRQ 15, but I/O on 300. Most
Ethernets use I/O 300 as default. I put the Mitsumi well out of the way, on
340. It being able to use IRQ 10 is a godsent. The soundcard uses IRQ 7, as
does LPT1, another DMA and I/O 220. All that info comes slickly out of Checkit.
OTOH, you may already have a utility to do it with. Type MSD from the C:\>
prompt. If you have Windows 3.1 that will do the trick, it's undocumented, but
actually is Microsofts Diags program.
Black peter
Interesting thread BTW