Lower half of mon8_40 ROM.

[William Beech]

Guys,

I believe the lower half of this ROM is an 8080 debugger tied into the
Monitor.  It is NOT the ASM/EDITOR 1.1 that we have elsewhere.

Bill

[Herbert Johnson]

Bill is correct, and my Web page was wrong but now corrected. There's
two sets of ROMs in play which I confused.

https://www.retrotechnology.com/restore/mon80_proms.html

I described that on an Intel IPB card, there was a daughter board of
2716's which contain a ROM Text Editor and ROM assembler. That's the
board imaged (my photo, the ROMs dumped) that's on Mark Ogden's archive
and his PL/M decompilation.

Mark's work and references are fine. My commentary about his work on
those ROMS, is now properly associated with that IPB part of my Web page.

I momentarily associated (in error) Mark's work, on a set of 1702 ROMs
found on an intellec 8/80 board by Mattis Lind. Those ROMs contain a
V4.0 MON80 monitor (that's still correct) in their upper half. My
section of my Web page is now correctly titled again, "Intel V4.0
monitor", reference to Mark Odgen's work removed.

Also: Bill Beech today, points out that the lower half of the intellec
1702 ROM-set, may be an 8080 debugger; but certainly not Mark Ogden's
recovered editor/assembler. Bill is correct.

So the ROM binary Bill is now referring to which he posted a
disassembly about, is (I believe?) from the Mattis Lind/1702/intellec
ROMs. Or at the least it's very close to that binary, by my brief
comparison of hex-dumps and prior/current disassemblies. (not an
exhaustive comparison).

So for now my Web page, associates Bill Beech with his current
re-examination of that ROM set "to make a better determination". I hedge
my description of it. I'll find out from Bill, if 1) I identified the
source of his ROM binary and 2) if/when he confirms the code is a
debugger and not something else.

Sorry for my errors. Thanks for all the correcting information and
patience with my descriptions and references. It's good to point to the
right binaries!

Regards Herb
--
Herb Johnson, New Jersey USA
http://www.retrotechnology.com or .net
preserve and restore 1970's personal computing
email: hjohnson @ retrotechnology dot com
or try later at herbjohnson @ comcast dot net

[Herbert Johnson]

Bill has conferred with me, and I accept his proposition that the MON80
V4.0-containing ROMs also contain some kind of debugger. I include his
recent results on my Web page now. He also gave me, a new disassembly of
the V3.0 MON80, which is added to the V3.0 section of my Web page.

So I believe my Web page is up to date with Bill's results. It correctly
attributes the Ogden PL/M codes for a ROMmed assembler and editor, with
the correct PROMs their binary (and the V4.0 monitor) were recovered
from. And the V3.0 ROMs with an undetermined additional program, Bill
postulates that program as a debugger, and provides a recent
disassembly. so I state that on my Web page and provide that code too.

The page shows work in stages, which is historically true, and useful as
an example of process. I look forward (kinda) to more work and corrections.

Regards, good holidays, Herb