I am speculating but it's unlikely this system has ATAPI support in the BIOS, which means that you would need to use option 2 or 3 as connecting a CD-ROM to the motherboard IDE header won't do anything. They are basically the same option except one is a combo controller+sound card and one is just the controller card.

In 1993 it almost certainly would have been an MKE/Panasonic, Sony, LMSI/Philips or SCSI CD-ROM rather than IDE. If it came with a sound blaster and CD-ROM as an option package, definitely MKE/Panasonic.

I have same computer, i was thinking like you... "what was original cdrom drive?" and some other stuff, like what was original speakers etc

Finally i found this picture

I open this thread some time ago

Re: IBM PS/1 Help to identify speakers

I found the speakers!

About CDROM, if you look at pictures, is a Matsushita that can use MKE-Panasonic CD-ROM interface or IDE

In theretroweb i can see still MKE interface units was made in 94,

https://theretroweb.com/cddrives/433

I dont really think any IBM came with CDROM in IDE interface. But i dont know exactly what sound card they use, in mine came a MWAVE, that dont have any cdrom connector

nice ! that picture is great, i did not know they sold these with labtec speakers back then!

so this machine should work in theory under pure DOS, with a soundblaster card isa card , that has the IDE connector, (not MKE/Panasonic, Sony, LMSI/Philips or SCSI)
and attaching any branded IDE cdrom drive

right?

Imito wrote on 2026-03-28, 13:02:

nice ! that picture is great, i did not know they sold these with labtec speakers back then! […]
Show full quote

nice ! that picture is great, i did not know they sold these with labtec speakers back then!

so this machine should work in theory under pure DOS, with a soundblaster card isa card , that has the IDE connector, (not MKE/Panasonic, Sony, LMSI/Philips or SCSI)
and attaching any branded IDE cdrom drive

right?

I have this IBM with a IDE 128GB HDD in master, in slave a panasonic 12x CD like picture, and a AWE64 with IDE and i attach a ZIP 100 pata

You can connect the cdrom to internal ide or sound card is same

i upgrade to DX4/100mhz and 256kb cache, the onboard Cirrus is a nice VLB card, the computer perform very well

theelf wrote on 2026-03-28, 20:55:

I have this IBM with a IDE 128GB HDD in master, in slave a panasonic 12x CD like picture, and a AWE64 with IDE and i attach a ZI […]
Show full quote

Imito wrote on 2026-03-28, 13:02:

nice ! that picture is great, i did not know they sold these with labtec speakers back then! […]
Show full quote

nice ! that picture is great, i did not know they sold these with labtec speakers back then!

so this machine should work in theory under pure DOS, with a soundblaster card isa card , that has the IDE connector, (not MKE/Panasonic, Sony, LMSI/Philips or SCSI)
and attaching any branded IDE cdrom drive

right?

I have this IBM with a IDE 128GB HDD in master, in slave a panasonic 12x CD like picture, and a AWE64 with IDE and i attach a ZIP 100 pata

You can connect the cdrom to internal ide or sound card is same

i upgrade to DX4/100mhz and 256kb cache, the onboard Cirrus is a nice VLB card, the computer perform very well

I did the same! Intel DX4 Overdrive 1oo mhz , and 256 cache. and kept the onboard cirrus logic.
the fast isa cards are kind of expensive, and the 83overdrive is too expensive

you said "You can connect the cdrom to internal ide or sound card is same" so 1 ide cable from the motherboard goes to the HDD and also the cdrom drive? and it will work? i didn´t know that.
can you share some pictures from the inside to see , maybe you have another motherboard

Imito wrote on 2026-03-28, 23:08:

I did the same! Intel DX4 Overdrive 1oo mhz , and 256 cache. and kept the onboard cirrus logic. the fast isa cards are kind of […]
Show full quote

theelf wrote on 2026-03-28, 20:55:

I have this IBM with a IDE 128GB HDD in master, in slave a panasonic 12x CD like picture, and a AWE64 with IDE and i attach a ZI […]
Show full quote

Imito wrote on 2026-03-28, 13:02:

nice ! that picture is great, i did not know they sold these with labtec speakers back then! […]
Show full quote

nice ! that picture is great, i did not know they sold these with labtec speakers back then!

so this machine should work in theory under pure DOS, with a soundblaster card isa card , that has the IDE connector, (not MKE/Panasonic, Sony, LMSI/Philips or SCSI)
and attaching any branded IDE cdrom drive

right?

I have this IBM with a IDE 128GB HDD in master, in slave a panasonic 12x CD like picture, and a AWE64 with IDE and i attach a ZIP 100 pata

You can connect the cdrom to internal ide or sound card is same

i upgrade to DX4/100mhz and 256kb cache, the onboard Cirrus is a nice VLB card, the computer perform very well

I did the same! Intel DX4 Overdrive 1oo mhz , and 256 cache. and kept the onboard cirrus logic.
the fast isa cards are kind of expensive, and the 83overdrive is too expensive

you said "You can connect the cdrom to internal ide or sound card is same" so 1 ide cable from the motherboard goes to the HDD and also the cdrom drive? and it will work? i didn´t know that.
can you share some pictures from the inside to see , maybe you have another motherboard

Each IDE channel (ATA) supports up to two devices (master/slave). You can mix HDDs, CD-ROMs, ZIP drives, or other ATAPI devices, although some combinations may have compatibility or performance limitations. This is standard behavior on AT-compatible systems.

You can even connect hard drives to the IDE interface on the sound card and use it with 4HDD

https://oldcomputer.info/hacks/4hdd/index.htm