did you set the jumper on the card.

No jumpers to set, unfortunately

The CT2940 is a Plug-N-Play card and it appears you have the Creative PNP drivers CTCM and CTCU installed.
Have you also run CTCU from a DOS prompt to see what it says ?
An observation: using a PNP sound card on a 486 build can be done but you would be better off to get an earlier non PNP version with jumpers that match the build period of the motherboard.

toastdieb wrote:

DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:168,10,36e

Have you tried:
DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:1E8,11

Having trouble finding good documentation on SBIDE.SYS but based on googling -

/P:168,10 seems like it might be trying to use the sound card IDE as IDE2 when your controller card has probably claimed IDE1 and IDE2 already.
/P:1E8,11 looks like it might register it as IDE3

Sounds plausible enough. The current /P switch settings were just the defaults the SB16 provided, I'll try your suggestion when I get home.

toastdieb wrote:

So I'm trying to put the finishing touches on what will end up being my first "from scratch" 486, and one of the very last thing […]
Show full quote

So I'm trying to put the finishing touches on what will end up being my first "from scratch" 486, and one of the very last things I need to do is to get a CD drive installed and working. Since my mainboard doesn't have onboard IDE/floppy connectors, everything has to go through controller cards, and I have three IDE drives (one HDD, one CF, and the CD) but only two IDE connectors on my controller card, so I'm trying to connect the CD through the IDE connector on my sound card, a CT2940. However, neither the manufacturer provided driver for my CD drive nor SBIDE.SYS are detecting the drive.

Is there some weird procedure to use the IDE on a SB16? I know the problem isn't the drive or the cables, so it's either the card or something I've done (or not done)

CONFIG.SYS

DEVICE=C:\DOS\SETVER.EXE DEVICE=C:\DOS\HIMEM.SYS DEVICE=C:\CTCM\CTCM.EXE DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:168,10,36e D […]
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DEVICE=C:\DOS\SETVER.EXE
DEVICE=C:\DOS\HIMEM.SYS
DEVICE=C:\CTCM\CTCM.EXE
DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:168,10,36e
DEVICEHIGH=C:\DOS\SSCDROM.SYS /D:MSCD001
DOS=HIGH
FILES=30

AUTOEXEC.BAT

SET BLASTER=A220 I5 D1 H5 P330 T6 SET CTCM=C:\CTCM C:\CTCM\CTCU /S C:\DOS\MSCDEX.EXE /D:MSCD001 C:\DOS\SMARTDRV.EXE /X @ECHO OFF […]
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SET BLASTER=A220 I5 D1 H5 P330 T6
SET CTCM=C:\CTCM
C:\CTCM\CTCU /S
C:\DOS\MSCDEX.EXE /D:MSCD001
C:\DOS\SMARTDRV.EXE /X
@ECHO OFF
PROMPT $p$g
PATH C:\DOS
SET TEMP=C:\DOS

You need to assign a drive letter in Autoexec.bat

Try this

C:\DOS\MSCDEX.EXE /D:MSCD001 /L:R

If that does not work then try VIDECDD.SYS driver.

Config.sys
DEVICE=VIDECDD.SYS /D:MSCD001

LASTDRIVE=Z

Intel486dx33 wrote:

You need to assign a drive letter in Autoexec.bat […]
Show full quote

toastdieb wrote:

So I'm trying to put the finishing touches on what will end up being my first "from scratch" 486, and one of the very last thing […]
Show full quote

So I'm trying to put the finishing touches on what will end up being my first "from scratch" 486, and one of the very last things I need to do is to get a CD drive installed and working. Since my mainboard doesn't have onboard IDE/floppy connectors, everything has to go through controller cards, and I have three IDE drives (one HDD, one CF, and the CD) but only two IDE connectors on my controller card, so I'm trying to connect the CD through the IDE connector on my sound card, a CT2940. However, neither the manufacturer provided driver for my CD drive nor SBIDE.SYS are detecting the drive.

Is there some weird procedure to use the IDE on a SB16? I know the problem isn't the drive or the cables, so it's either the card or something I've done (or not done)

CONFIG.SYS

DEVICE=C:\DOS\SETVER.EXE DEVICE=C:\DOS\HIMEM.SYS DEVICE=C:\CTCM\CTCM.EXE DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:168,10,36e D […]
Show full quote

DEVICE=C:\DOS\SETVER.EXE
DEVICE=C:\DOS\HIMEM.SYS
DEVICE=C:\CTCM\CTCM.EXE
DEVICEHIGH=C:\DOS\SBIDE.SYS /D:MSCD001 /P:168,10,36e
DEVICEHIGH=C:\DOS\SSCDROM.SYS /D:MSCD001
DOS=HIGH
FILES=30

AUTOEXEC.BAT

SET BLASTER=A220 I5 D1 H5 P330 T6 SET CTCM=C:\CTCM C:\CTCM\CTCU /S C:\DOS\MSCDEX.EXE /D:MSCD001 C:\DOS\SMARTDRV.EXE /X @ECHO OFF […]
Show full quote

SET BLASTER=A220 I5 D1 H5 P330 T6
SET CTCM=C:\CTCM
C:\CTCM\CTCU /S
C:\DOS\MSCDEX.EXE /D:MSCD001
C:\DOS\SMARTDRV.EXE /X
@ECHO OFF
PROMPT $p$g
PATH C:\DOS
SET TEMP=C:\DOS

You need to assign a drive letter in Autoexec.bat

Try this

C:\DOS\MSCDEX.EXE /D:MSCD001 /L:E

If that does not work then try VIDECDD.SYS driver.

Is that something I'll need to do specifically because I'm routing it through the SB16? When connected to IDE2 on my controller card, the CD is autoassigned D: using my current Config.sys and Autoexec.bat.

(Haven't been home long enough to do anything but sleep, so I haven't tried any of the proposed solutions yet - tonight, hopefully!)

I was laid out with strep for about a week and then got tied up with home winterization after I recovered, but I finally managed to get back to this project tonight. I don't know exactly what I did, but it suddenly decided to start working without any changes to my CONFIG.SYS. While I was away, I had ordered some MPC cables and fresh CR2032s, so I popped those in along with a couple sticks of memory I had lying around. My best guess is that I must have had the BIOS configured incorrectly before or something. IRQ settings shouldn't affect drive visibility though, right?

Anyway, it's working now.

Can you please share your autoexec and config.sys? I have exactly same problem and I am trying to fix it.