Lee Felsenstein livestream Sun. June 14 at 1PM (Eastern):
https://youtube.com/live/Js6R3OIxiKY
Before the laptop, before Apple took off, there was Lee Felsenstein. As the
legendary moderator of the Homebrew Computer Club and designer of the
Osborne 1 (the first commercial mass-produced portable computer), he didn't
just build the tools—he changed the rules. Don't miss our exclusive
livestream with a true PC pioneer this Sunday June 14 at 1PM (Eastern)!
Take care!
Jeff Brace
VCF East Showrunner
Georgy,
One of the software disks that came with my 8:16, which I purchased in
March of 1984, has a printed label saying (with the "d" after 2.1.1 hand
written in blue ink):
<quote>
ATTACHE
MSDOS
REVISION: 2.1.1d SN 1850 48 TPI Date: 02/29/84
</quote>
Volume 5, Number 1 (Spring 1985) of "Where It's Att. Official Newsletter
of the First Attache/2001 User Group" lists the "Newest" FAUG Library
disk as "Attache MS-Dos 2.11e(x) System Disk FAUG211e(x). The latest
'unreleased' Otrona 8:16 master disk for MS-Dos. About to come out when
bankruptcy hit Otrona."
That same issue says that RAMDISK.SYS works only with 2.11e(x) and not
with earlier versions. Issue 5, Number 2 says that "211e(x)" "Includes
extensive new hard disk software."
Regards,
Bob
P.S. to Fred: My apologies for not knowing offhand if the MS-DOS version
is "two eleven e (x)" or "two one one e (x)". When I get my 8:16
running, I can check. Bob
>Message: 12
>Date: Tue, 9 Jun 2026 12:09:28 +0700
>From: Georgy Galtsev <georgijgalcev1570(a)gmail.com>
>Subject: [cctalk] Re: Need Otrona Attache 8:16 MS-DOS Disk
>
>in fact, the version from the Don Maslin archive labels itself as 2.11,
>without additional letters. Where does the information about 2.11d and
>2.11e come from?
<snip>
Does anyone have a working copy of a bootable Otrona Attache MS-DOS
2.11d or 2.11e disk that they can copy and snail-mail to me? All of my
disks are giving a "Bad or missing Command Interpreter" error. I no
longer have another computer that reads/writes 5 1/4" IBM 360KB disks,
so I need a physical copy.
Please email me at feldman.r(a)comcast.net so we can arrange shipping (I
am in Chicago) and payment.
Thanks,
Bob Feldman
Gimix Documentation Needed!
I need the following Gimix documentation:
Intelligent 4 Port Serial Interface (24-0076A)
256K Memory Board (24-0082)
6809 CPU III Rev C (24-0066C). I have the manual for 24-0066B.
Thanks,
Please email me at directly if you have it (bitwiz(a)12bitsbest.com)
I've been working on this project for ages. It is not complete. It may never be complete. It is, however, finally in a state that I consider to be eminently usable. A "beta" or "soft opening" - there are absolutely some visibly unfinished areas. But, it can absolutely be used while I continue improving the typesetter and the indexer, polishing the presentation, and adding manuals for new systems.
http://www.typewritten.org/Manual/
Some folks were given access to previous development versions and asked not to share the URLs. If you were one of them, please transition to this URL instead; this one can be considered fully public.
ok
bear.
ps. this announcement was also sent to the VCFED forum and the TUHS mailing list
Take a look at OneROM - onerom.org - for a modern take on replacement for EPROMs
Jack
________________________________
1. HN482764G EPROMS (Mike Katz)
----------------------------------------------------------------------
Message: 1
Date: Wed, 3 Jun 2026 11:15:30 -0500
From: Mike Katz <bitwiz(a)12bitsbest.com>
Subject: [cctalk] HN482764G EPROMS
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Message-ID: <74668242-f18c-4c15-8cc5-e587d235bc8b(a)12bitsbest.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Does anyone have any HN482764G or other 250nS or faster 2764 EPROMs they
can let go of inexpensively?
I could use 4 or 5. I will generate the shipping label from here so you
don't have to worry about the shipping costs.
Thank you,
Mike
End of cctalk Digest, Vol 1193, Issue 1
***************************************
The next Glen Ellyn CCC repair and pizza meeting will be in July:
Date: 18-Jul-2026
Location: 385 Saint Charles Rd, Glen Ellyn, il 60137
Time: 2:00PM - Pizza will be ordered around 5:30PM - 6:00PM
Contact: +1 (773) 414-1044
Transportation to and from the Glen Ellyn Metra Station, which is on
the Metra Union Pacific West Line, will be available with advance notice.
https://schedules.metrarail.com/pdf/UP-W.pdf
I found this document by persistent google searches for information about "U of Arizona MUDBUG 6800" --
https://ntrs.nasa.gov/api/citations/19840010841/downloads/19840010841.pdf
Not sure this is the document the other gentleman referred to, but it did come from a "government" web site (NASA related).
Dear all,
I came across MUDBUG a monitor for the MC6800. It is much more “sophisticated” then MIKBUG and friends…
I did find a report at a .gov website that shows the manual and schematics. Could not find anything on the website of Arizona State University which did a great part of the development.
The question is if there is a) a S19 file, but rather the asm source code?
It would be nice historically to add this to the legacy of mikbug, minibug, etc.
Regards, Roland
MUDBUG
MUDBUG was a monitor and debugger program created for the Motorola 6800 by developers at Arizona State University in the mid-1970s. Designed as a resident system tool for low-level program control, MUDBUG provided early microcomputer users with interactive facilities to inspect, modify, and debug memory and registers. It exemplified the era’s shift toward software-based development environments for new microprocessors.
Key facts
Platform: Motorola 6800
Type: Machine-language monitor/debugger
Developed at: Arizona State University
Period: Circa mid-1970s
Purpose: Memory and register examination, program testing, and I/O control
Background and development
MUDBUG emerged shortly after Motorola’s introduction of the 6800 microprocessor in 1974, a period when educational and research groups built tools to support the device’s use in embedded and teaching contexts. Arizona State University’s version extended the capabilities of Motorola’s own MIKBUG monitor, offering improved memory handling and command flexibility for laboratory instruction and small-scale system development.
