VAX-11/730 %BOOT-F-Unexpected Machine Check

Mark J. Blair nf6x at
Tue Jun 9 16:54:00 CDT 2015

> On Jun 9, 2015, at 14:43 , Johnny Billquist <bqt at> wrote:
> Yes, R5 is more or less used the same on all VAXen, since this is used by VMB, which almost all VAXen use in one form or another.

Thank you very much for the R5 details!

I presume that the other registers and the VMB.EXE that reads them are probably machine-specific, as I see all sorts of arbitrary-looking numbers stuffed into them depending on which device the ddnBOO.CMD file corresponds to.

> Yes, you should be able to plug a TZ30 in to pretty much any Unix box, and read TK50 tapes off that.

Cool. I'm looking for one now. The seller who sold me the TK50 doesn't have any, and I've tried contacting another seller I found online. eBay and I are seeing other people now, but the TZ30 listings I found there look overpriced to me, anyway. I'll start new threads here and on VCF to see what I can scare out of the woodwork.

Mark J. Blair, NF6X <nf6x at>

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