Stuck booting Cromix/UNIX with STDC

[Jay Cotton]

Hi: 

I am attempting to debug a Cromix/Unix booting issue.

The primary symptom is that booting Cromix and announcing that system configuration

complete the system stops running.  My assumption is that the STDC should provide

an interrupt to tell the operating system that a new i/o is complete.

This same symptom occurs with UNIX after it lists out the memory allocation message.

All of this h/w used to work up until about two years ago when it stopped.

I put a logic analyzer on IC19 of the 16fdc board in order to monitor interrupt requests

and grants.  However, there are no requests or grants showing up.

So the question is, should I see some kind of request/grant activity when booting

Cromix or UNIX ?

I should point out that XDOS and read the entire disk image with only 6 track errors.

These track errors are present on all the disk images that Marcus posted.

Also I can boot Cromix off a floppy and mount the Cromix image and use the

files on the mount point.  I.e. the disk seems to be working.

I have checked the grant/request lines several times, and verified continuity 

between the boards.

I am kind of stuck for the next step.

Thanks

JC

[Mike Stein]

Are you sure you're booting the correct partition? IIRC the boot partition definition in the 1.xx XDOS (which I believe you have) was inconsistent, confusing and maybe even downright incorrect. Check the boot device # carefully as it tries to boot.

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[Jay Cotton]

yep.

bst2  boots cromix off of partition 2

bst1f  boots unix off of partition 31

And in fact both report there presents at start of boot.

And yes XDOS 1.09

jc