Multitasking DOS 4.0 (Internal revision 6.7 85/11/26) hangs during boot

[starfrost013]

Multitasking DOS 4.0 (Internal revision 6.7 85/11/26) hangs during boot

[dbalsom]

This version of DOS sets an unusual interrupt vector offset in ICW2 to the PIC which I wasn't handling.

There's still an issue where it doesn't boot if the Xebec controller is configured. 86box doesn't have this issue so that will need further investigation.

[dbalsom]

My work on Minix has helped here, now we can boot with the xebec controller as well.

[dbalsom]

Thanks for the report. I never tested DOS 4.0; I went from 3.30 to 5.

[starfrost013]

There are two DOS 4s - the regular DOS 4 (which came out in 88) and the multitasking OS "DOS 4", from 1985. It's a bit of a mess, but I'm testing the latter.

[starfrost013]

very nice - is it committed yet? doesn't seem to be? I have been working on researching this OS and debugging it so this is really useful, thanks

[dbalsom]

0.1.4 is unstable development, but it is committed here
https://github.com/dbalsom/martypc/tree/ca0441c81f7de646cd6c6c71992072eeb9760f0b

[lautis0503]

I try to boot it in both version.
In MartyPC v0.1.3, it hangs.
In MartyPC v0.1.4 94ce57c, it reports:
Bad or missing Command Interpreter

PS: It boots in PCE.

[starfrost013]

I think bad or missing conmand interpreter might be a misconfiguration issue if you're booting from floppy (change shell from a:\command.com to c:\command.com); I booted it from floppy on commit ca0441c

[lautis0503]

I think bad or missing conmand interpreter might be a misconfiguration issue if you're booting from floppy (change shell from a:\command.com to c:\command.com); I booted it from floppy on commit ca0441c

I tried commit ca0441c, with the martypc.toml you uploaded, with floppy images downloaded from your link. Everything seems to be the same as yours. But still got a Bad or missing Command Interpreter
No idea what happened.

[dbalsom]

seems you will get "Bad or missing Command Interpreter" if the Xebec rom is loaded. I am not sure what the conflict is; I can load the xebec rom in 86box and it will boot.