Mark,
Dave Bryan and I are trying to work out the kinks in the 'erase'
function on the 940, which is needed to make the tape file system work.
Dave has implemented precise in-place erase for records, but we'll need
a precise erase for file marks too. And then the whole thing has to be
tested.
I'll keep you posted on progress.
/Bob
On 10/24/2016 12:00 PM, simh-requ...@trailing-edge.com wrote:
Message: 2
Date: Mon, 24 Oct 2016 10:48:44 -0500
From: Mark Emmer
To:simh@trailing-edge.com
Subject: Re: [Simh] Operating Systems with Sources
Message-ID:<4c6e802c-49a7-0680-c8e1-d0253b0d1...@snobol4.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Sorry Al, but I've been pedal-to-the-metal for the past 15 months on
another project and haven't been able to get back to the 940 timesharing
system. I think the last status I reported was that it was running in
the original build configuration of mag tape and drum, with the ability
to re-assemble, link and run a new O/S from source files. File I/O to
the drum worked, but the tape-based file system (including
overwrite-in-place) is a disaster that I'm avoiding. I can't even get
it to recognize when I think is a properly labeled tape, and the new
tape utility is absent. Best hope is to get the Data Products or Bryant
disk driver working and build a proper disk-based system.
Unfortunately, the Oper utility to layout a disk with file directories
and boot images is missing, so I'm going to have to cobble up something
in C to replicate it.
I do intend to work on it again when programming becomes fun again.
Mark
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