I installed a SB16 CT2950 in my 486 computer. It has a CDROM drive attached to the IDE interface.
But the CDROM drive sometimes works and sometimes it does not.
I already swapped the IDE ribbons.

I ran the SB16 diagnostics program and every thing is configured correctly and audio works great.
Passed all test successfully.

One problem I am having is that on bootup the SB16 drivers load fine but the CDROM is not assigned a letter.
So I can’t access the CDROM.

How can I fix this.
Do I need to add some lines to autoexec.bat and config.sys ?

I used this SB16 PnP package from Phil’s-CL. ( ctcmbbs.exe )
https://www.philscomputerlab.com/creative-labs-drivers.html