I used this version of OAK https://www.hiren.info/download/dos-files/oakcdrom.sys

and the problem persists. I even tried 3 different sound cards with the CDROM in UDMA and PIO modes:
- SoundBlaster AWE64 Gold

- SoundBlaster Vibra 128

- Yamaha YMF724

It took me this long, because to avoid messing up my system, I have added additional modes the system can start with, besides the basic 5 present in FreeDOS 1.3 RC5. My extra modes are specific for each sound card with extra /K parameter for COMMAND.COM so that the drivers are up and ready as soon as I receive an interactable console. I also needed to edit the Yamaha driver to add support for the southbridge.

In all 6 tests, the CD input would produce static noise, except with Vibra 128. Don't even get me started on this card, it's always been an unstable mess in DOS, courtesy of JEMM386.

Any more ideas? It used to work flawlessly in FreeDOS 1.2 with SHSUCDX backported from 1.3 RC that was newest like, at least a year ago. It turned out back then that SHSUCDX from FD 1.2 does not support CD playback at all.

So, where did things go wrong? Could it be possible that between FreeDOS release candidates, SHSUCDX changed to fix the issue and then break it in a new way?

Best regards,

Michał

W dniu 16.01.2022 o 19:39, Louis Santillan pisze:
Not sure about the circumstances of your Rayman crash but I’ve read many posts about issues with that game on DOS. Apps that access the file system or hardware directly, disk caches can cause certain types of file corruption.  Whole file system corruption is odd and might indicate other issues (CPU, RAM, IDE controller, BIOS, drive).

You haven’t provided any details about your hardware.  That said, most drivers had compatibility with multiple drive makers.  And usually, you only had to specify the device “/d:xxyyzz”.

There’s a list of popular device drivers here.

https://www.hiren.info/downloads/dos-files

MS used to license OAKCDROM.SYS and CD1.SYS for IDE drives.  You can find other cd rom drivers at

https://www.allbootdisks.com/disk_contents/98.html


I’d try to find your vendor’s driver disk in archive.org <http://archive.org> or other vintage computing sites.



On Sun, Jan 16, 2022 at 5:09 AM Michał Dec <moog...@gmail.com> wrote:

    W dniu 16.01.2022 o 13:58, Eric Auer pisze:
    > nothing worse than crashing should happen
    > if you give the wrong answers.

    After working with Rayman I am simply traumatized by crashing
    anything
    under DOS, because any and every crash can mean the destruction of
    the
    filesystem's integrity.

    I'll try and get the OAK driver and let you know what happens next.

    Best regards,

    Michał



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