[DOSBox-X] Linux guest cannot access/find CD drive

[dacicus-occidens]

Summary

It is possible to boot some versions of Linux using a loader program, but Linux cannot find/access the CD drive. The CD drive is accessible from the DOS prompt before booting Linux.

Repro

1. Boot Tiny Core 7.0 as described here
2. Try to mount the CD drive: sudo mount /dev/sr0 /mnt/sr0

Output

Mounting fails and gives this error message: isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16

Comments

I built a stand-alone DOSBox-X v2025.02.01 to match the version reported in BizHawk. The stand-alone DOSBox-X does not have problems mounting the CD drive after booting Tiny Core. I also tried Damn Small Linux 4.4, which someone else had booted successfully in DOSBox-X as described in posts starting here. DSL also fails to find the CD drive in BizHawk but not in the stand-alone DOSBox-X. I tried using the DOSBox-X configuration file from BizHawk with the stand-alone DOSBox-X and a configuration file from stand-alone DOSBox-X with BizHawk; neither of these experiments changed the outcome in either emulator.

Host env.

• BizHawk 2.11 from the BizHawk-2.11-linux-x64.tar.gz release file
• Tiny Core Linux 16.1 (x86_64)

[YoshiRulz]

Try a dev build, there have been some fixes to disc loading.

[dacicus-occidens]

This is still a problem in the latest dev build (commit 23fd0ba).