hard drive?

[ddtopham]

This is nice enhancement from original that works from floppy image.

My emulator (TinyEMU) only supports hard drive though (not floppy, not CD, not USB)

Could you outline what might need to change to use just hard drive image?

When I try your osall.iso I get response of "!!" for every command I type

[jakiki6]

The "!!" means that it cannot find the command you typed. Does your bios support LBA addressing? (INT 13h AH=42h and 43h)

You can try to run an older version that uses the old address mode. (link)

[ddtopham]

Thank you, I just tried that link, but still osall.iso is cd image; wouldn't that affect the way program works?
i.e. I need to boot from hard drive (which is device number 80 in int10 video rw sector routines)

[jakiki6]

Yeah the osall.iso was old

[jakiki6]

the new osall.iso file should be a hard drive image

[ddtopham]

I appreciate your effort and work on this project. It still does not work with TinyEMU so perhaps there is some other issue than just "hard drive". It will take me quite a while to try and understand, but I will work on it. Perhaps it is as you suggest, related to LBA addressing. TinyEMU was written by same person that originally developed QEMU (Fabrice Bellard) to run in embedded systems (like his JSLinux in the browser!). It still used SeaBIOS, but must be some other issue.

The symptom is that it just hangs waiting for commands to return. (At least it isn't returning "!!". )

It is very hard to debug in this bootsector environment since no gdb or way to trace return codes easily.