Still seeking 3B2 information
billdegnan at gmail.com
Fri Aug 14 17:24:35 CDT 2015
MARCH has (or once had) a lot of 3B2 hardware and documentation at
InfoAge in NJ. Maybe Evan is reading this thread or you can ask him
via midatlanticretro.org. I recall at least one complete system
donated years ago.
On Fri, Aug 14, 2015 at 5:13 PM, Jerry Kemp <other at oryx.us> wrote:
> Hello Seth,
> Thanks for the update.
> I wish I could assist further, but aside from shell scripting, I'm not a
> developer, and aside from my "ATT System Administrator" classroom book, I
> really don't have any additional documentation.
> That said, I will close with a thank you for your work on this and progress
> you have made so far to date. I think that it is an exciting project, and
> honestly, I really never expected to see a 3B2 emulator. I hope the items
> provided by Al Kossow is what you need to move this project forward.
> Jerry Kemp
> On 08/14/15 02:28 PM, Seth Morabito wrote:
>> * On Tue, Aug 11, 2015 at 09:36:36AM -0500, Jerry Kemp <other at oryx.us>
>>> Hello Seth,
>>> We were having a 3B2 discussion on the Sun Rescue list, and that got
>>> me to thinking about your emulator project.
>>> Can you share a status update?
>> Hi Jerry,
>> Sadly, it's been stalled for quite some time now. Current status is
>> pretty much the same as it was in January. The simulator can boot the
>> 3B2/400 firmware, pass diagnostics, and read directories from virtual
>> floppy disks. Unfortunately, it can't get much beyond that -- trying
>> to boot the UNIX kernel still fails miserably.
>> I'd hoped to have much better progress to share, but Real Life
>> intervened by throwing me several major curve-balls in the first half
>> of this year, and it's only now that things are really starting to
>> settle down.
>> Even so, two things are still really holding me up:
>> 1. Lack of good documentation for the system design of the 3B2
>> 2. Lack of access to a physical 3B2
>> I hope to get #2 sorted out soon(-ish), so I can run a 3B2 with a
>> logic analyzer attached. There's still some mystery surrounding some
>> system timers and interrupts that I need to figure out before I can
>> really make progress.
>> I'd still love to get #1 sorted out, too. There are some 3B2 internals
>> docs on their way to Al Kossow that I hope will get scanned in the
>> next few months, I think that would help greatly.
>> Best Wishes,
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