[vcf-midatlantic] LSI-11 simulator (looking for the author)

Kenneth Gober kgober at gmail.com
Thu Sep 10 13:39:58 EDT 2020

On Thu, Sep 10, 2020 at 10:10 AM Richard Cini via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> I was able to locate and correspond with the original author, and he
> doesn’t recall creating custom disks or disk images. Hmmm.

The original author might not have created a custom disk or disk image, he
might instead have created a custom PF device driver, then made a bootable
"PF" disk the normal way using PIP or whatever.  I have a vague idea that
RT-11 does this by copying a part of the PF device driver to the boot
block, then arranging for the rest of the device driver to reside at a
particular place on the disk (where the boot block code expects to find
it).  The magazine article referred to the need for a custom PF driver, did
it not?

Technically the result could be considered a "custom" disk but when you're
dealing with decades-old memories the distinction between "custom" and
"standard" might apply more to the procedure used rather than the end
result.  In other words, I might recall editing a disk image with a hex
editor as making a "custom" disk, but if I had produced exactly the same
result using standard OS tools I might not.remember this as being "custom"
at all.


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