That's a lot of jumpers for the CD Controller Address. It likely allows a very wide range of addresses to be selected.

DMA and IRQ are clearly labelled, but the address could be anywhere.

Do you have a drive and driver to test? Or maybe some diagnostic tool picks up the controller?

Address jumpered to either 0BCh or 340h, guess which one is more likely...

Mau1wurf1977 wrote:

That's a lot of jumpers for the CD Controller Address. It likely allows a very wide range of addresses to be selected.

DMA and IRQ are clearly labelled, but the address could be anywhere.

Do you have a drive and driver to test? Or maybe some diagnostic tool picks up the controller?

The IRQ and DMA settings are clear but the PORT adress is a wild guess without any docs

I've tried with a working drive and the correct drivers but the system hangs during boot when using the default adresses the Mitsumi cd-rom driver setup uses

Not sure about the Mitsumi but with the Sony 34 pin cdrom interface on my sb Pro the io address was always 10 above the sound blaster base address. Eg the sb was set to 220 and the CDROM was at 230.

DonutKing wrote:

Not sure about the Mitsumi but with the Sony 34 pin cdrom interface on my sb Pro the io address was always 10 above the sound blaster base address. Eg the sb was set to 220 and the CDROM was at 230.

Yeah, and the Mitsumi uses 300, 340 etc so I'm very clear about what ports it uses but completely lost when it comes to the port jumpers on the card

As far a can remember from the days...

Jumper everything except a2 and a3 and give it a try.

sprcorreia wrote:

As far a can remember from the days...

Jumper everything except a2 and a3 and give it a try.

What port adress is that? I have to match the port jumpered on the card with the correct switch when launching the driver in config.sys

Amigaz, how is dmactl set?

Amigaz wrote:

sprcorreia wrote:

As far a can remember from the days...

Jumper everything except a2 and a3 and give it a try.

What port adress is that? I have to match the port jumpered on the card with the correct switch when launching the driver in config.sys

I believe its 300h. I could try to help you if you posted a pic of the mitsumi chip and the other jumpers. Or perhaps a link to a hires picture of the whole card.

Have you tried 340h with that config you have?

I would try to get it working with
JP26 ON
JP29 ON
Adress as is (i believe is 340h)
DMACTL on the other position
IRQ set to 5
DRQ and DACK as is

You would have to test it alone as i see to many cards in that system 😀

From web research I found that the Creative Mitsumi CD-ROM I/O port addresses were 0x310, 0x320, 0x340 and 0x350. Creative was smart enough to skip the possible conflicting MIDI I/O port adddresses of 0x300 and 0x330. So for your Creative ISA CT-2600 (Mitsumi) sound card you have the following table:

1      Creative CT-2600 CD-ROM
2
3       [Jumper  ON = 0x00]
4       [Jumper OFF = 0x01]
5
6    CD-ROM       (JP32-39)  (hardwired)
7  IO Address      AAAAAAAA      AA
8   (Mitsumi)      98765432      10
9***************************************
10    0x310         11000100      00
11    0x320         11001000      00
12    0x340         11010000      00
13    0x350         11010100      00

I have no idea about what the default for any Creative CD-ROM (Mitsumi) drivers may be however...

dvwjr

Just reread your post and you mentioned a 1x drive?

Any chance that it's the LUO drive which slides out at the front and then you open a lid upwards to enter the disc?

Mau1wurf1977 wrote:

Just reread your post and you mentioned a 1x drive?

Any chance that it's the LUO drive which slides out at the front and then you open a lid upwards to enter the disc?

Indeed it is 😀

(going to try what people have suggested later today)

Oh man! That was my first ever CD-Rom drive. Purchased it in Linz from Escom which was a PC super chain back in the days.

It came with an ISA controller card and I very fond memories of that Drive. A bit later I got a Panasonic 2x Drive (the same one Creative sold), simply because games demanded more speed (7th guest or Rebel Assault).

Mau1wurf1977 wrote:

Oh man! That was my first ever CD-Rom drive. Purchased it in Linz from Escom which was a PC super chain back in the days.

It came with an ISA controller card and I very fond memories of that Drive. A bit later I got a Panasonic 2x Drive (the same one Creative sold), simply because games demanded more speed (7th guest or Rebel Assault).

Cool

imho these early cd-rom drives are very "exotic" and interesting

Please don't mention Escom's name here...one of the wankers that ruined Amiga 😜

I really don't like a lot of the budget drives with proprietary interfaces that shipped with the creative labs CD-ROM bundles. I have a high quality Sony 1X SCSI drive that almost seems to run circles around a Sony 2X proprietary budget drive that was manufactured a few years later.

Transfer rate was only 150KB/s for these 1x drives. The choice of interface should have no impact whatsoever, so your experience are quite surprising. Unless that 2x drive had some issues.

I clearly remember when I upgraded to 2x, you did n fact get double the transfer rate. Access time however only improved slowly.

One area where the Mitsumi 1x drive was fantastic, was jumping tracks when listening to a Music CD. It was virtually instantaneous and I never had a drive again that could jump tracks so fast!

A few drives used caddies, a bit of a hassle if you ask me.

One area where the Mitsumi 1x drive was fantastic, was jumping tracks when listening to a Music CD. It was virtually instantaneous and I never had a drive again that could jump tracks so fast!

That's something the Sony drive I have (CDU33A, 2x speed) sucks at. Particularly noticable in games like Loom that make extensive use of CD audio. In Loom CD the different notes on the distaff are CD audio tracks so there is a noticable pause of a second or two between each note as the game seeks on the CD ROM drive.

Amigaz, how did you go?