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How do I install IBM PC Xenix 1.0?
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Author:  vlad557776 [ Sun Dec 01, 2019 6:49 pm ]
Post subject:  How do I install IBM PC Xenix 1.0?

Hi.

Recently I was installing IBM PC Xenix 1.00 on 86box using a Trigem 286M config (standard IBM PC/XT/AT never work for me). The farthest I could get at the installation is the initial boot from the HDD, where after hd /xenix it reboots back to the bootloader prompt.

How can I get past this?

Author:  TheCollector1988 [ Sun Dec 01, 2019 8:32 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

What hard disk controller were you using on the IBM PC/XT/AT (and on the Trigem one)?

Author:  vlad557776 [ Mon Dec 02, 2019 5:02 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

I used the standard IDE controller.

Offtopic Comment
Happy late birthday, TheCollector1988!

Author:  TheCollector1988 [ Wed Dec 04, 2019 3:20 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Well, in the XT, use a MFM/RLL controller and try again, note that the chs geometries in those controllers are limited, so, as a precaution, use a CHS of 615/4/17 (20MB).

Author:  vlad557776 [ Fri Dec 06, 2019 6:48 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

I tried. XENIX's FDISK refuses to work on the Trigem with MFM controller, and XT 286 and AT doesn't even boot the kernel.

Author:  TheCollector1988 [ Mon Dec 09, 2019 12:00 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Well, as I said, use a pure 8088 XT with a MFM/RLL controller.

Author:  zde [ Mon Dec 09, 2019 12:49 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Is this the same Xenix which only works on select few 286 systems with old HDDs?

The whole process was described very well with all the gory details and patches long ago here.

Maybe it would be good for someone who would repeat it to share resulting image, though.

It doesn't look like an obvious process to me at all.

Author:  vlad557776 [ Mon Dec 09, 2019 6:34 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Managed to get it to work on VirtualBox. TheCollector1988, the classic XT refused to work and said "Missing operating system". After recreating the HDD, it booted into... BASIC. Same issue with Generic XT clone. Maybe that's because of 5.25 1.2MB floppies?

zde, thanks for the link. I'm going to release my OVA in a few days.

Author:  Winins [ Mon Dec 09, 2019 6:53 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

XT boots into BIOS BASIC when there is no boot floppy/hard disk (correct me if I am wrong)

Author:  vlad557776 [ Mon Dec 09, 2019 7:32 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Correct. Still, don't know why it booted into BASIC instead of XENIX bootloader.

Author:  AlphaBeta [ Mon Dec 09, 2019 10:11 pm ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

vlad557776 wrote:
Maybe that's because of 5.25 1.2MB floppies?

Definitely. XT supported at most 5.25" 360k drives.

Author:  vlad557776 [ Wed Dec 11, 2019 9:27 am ]
Post subject:  Re: How do I install IBM PC Xenix 1.0?

Hey, just installed Xenix 2.0 on PCem with the exact same config. No panics, no unexpected reboots. 86box doesn't work sometimes.

1.0 says: /boot not found.

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