Hi Jecel and all
>Back in 2005 someone posted the sources for all the PALs, I looked at
>them, but didn't save a local copy. A quick search only showed the
>source for the TSM (timing state machine) circuit in
>
> > http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=26198
Kryten saved some of what you posted, but his website also is no more. I
sifted through archives, everything I could find as well as my own musings
are up on
http://www.retro.co.za/ccc/mac/ReverseEngineering/PALs.html
>I did a clean room implementation of the PALs in 1987 that was better
>(27% performance increase over the original) but don't have a copy of
>the sources (I do have access to a machine with the actual PALs with my
>design, however).
Let's hope you didn't blow the fuses -- if you can, read them and post the
results?
Thanks
W
For the past 5 years or so I have been collecting references on early 8-bit
microprocessors, with an emphasis on the Motorola MC6800. The best source is
trade magazines from the mid-1970s. I have a reasonable collection of
McGraw-Hill's Electronics and a few issues of Electronic Design and EDN. I
am old enough that I read all of these when they were new. I got a bunch
>from eBay and another bundle from Steven Stengel on this list. I have not
ventured over to the University of Washington yet, they have a good
collection. (I can scan my individual issues at home.)
Motorola did not chronicle their microprocessor development like Intel did.
MOS Technology has Chuck Peddle telling an alternate reality version of the
events. Chuck's enthusiastic promotion of the 6502 in 1975 was responsible
for its success and his story has improved with 35 years of retelling.
Rereading these magazines gives a better understanding of what really
happened. Did you know that the Motorola 6800 and Intel 8080 both had their
introductory articles in the April 18, 1974 issue of Electronics?
I have uploaded a selection of articles to my website.
http://www.swtpc.com/mholley/Microprocessors/Microprocessor_History.htm
There is one issue with a 6800 article that I have not found is the November
20, 1974 issue of EDN, "A very complete chip set joins the great
microprocessor race" starting on page 87. Has anyone got it?
I wrote the Motorola 6800 article on Wikipedia and just updated the MOS
Technology 6502 article.
Michael Holley
> From:?"Brad Parker" <brad at heeltoe.com>
> Date:?Mon, 18 Jun 2012 10:55:30 -0700
> Subject:?RE: emulated linux/bsd motorola 68k system?
>
> The code is pretty dense but also pretty complete. ?The sun-2 is 68010
> based. ?As I recall
>
> the sun-3 is 68020 based. ?I can't remember if there were any 68030
> based sun's.
>
> -brad
I helped Matt get the Sun-2/Sun-3 emulator working by doing countless
tests on my Sun 2/120.
I still have the 2/120.
The Sun 3/80, 3/460, and 3/470 are 68030 based. I have one of each.
--
Michael Thompson
I think it is anyway,.
http://www.ebay.com/itm/110897384303
Dec VT Lan 40 terminal. Appears that it might take PS2 kb and mouse,
and vga display. $75. Only mention because of the recent threads on
dec terminals and the like.
Jim
Original Message:
Date: Wed, 20 Jun 2012 10:44:04 -0700
From: Stan Sieler <ss at allegro.com>
Re:
>> Those are firmware and utility tapes for Burroughs series L8000 and L9000
>> computers, the predecessors of the B80 and B90 series and fairly rare
>> since
> I should have realized this...I arranged the donation of a working
> Burroughs L9000 to the Computer History Museum a few years ago (it had
> been in constant use until a month before the donation).
> Stan
---------
Heh, heh; yes indeed. As a matter of fact I believe the pictures on the
Pickles site of Betty and the L9000 that went to CHM originally came from
you (DVQ), and you and I exchanged a few emails about it at the time.
mike
>Those are the massive ones sittng horizontally on the PCB, right?
That is correct.
>there's a smaller can-type electrolytic on the output side.
Yes on the 7441 there are two small axial style electrolytic that stand
vertically on the PCB. These are small and cheap enough here to just
replace so I think I will do that.
>re suppliers
Yes we have RS Components here in NZ and they have a good range of parts
and generally the pricing is fairly reasonable. No freight charges on
internet orders even if they bring the stuff in from the US or UK.
Sometimes I wonder how they make money when I receive individually bagged
microcontrollers for a few $ each shipped from the US. Must be some margin
in there somewhere.
I did find
http://newzealand.rs-online.com/web/p/aluminium/2508858302/?searchTerm=2508…
which
meets the specs but is very expensive down here.
Based on your suggestion that 22000uf 50V would likely be OK I wonder if
the following part might be an alternative:
http://newzealand.rs-online.com/web/p/miscellaneous/2550081355/?searchTerm=…
Considerably cheaper down here.
Regards
Andrew
>
>Well we have had all the fun with 68K designs, but I would really like
>to build a 6809 system. Any one know of a source for boards for a
>simple system with say Serial Port and Parallel Port and memory?
Buy a color computer or a dragon. It's pretty much a clone of the appnote.
Otherwise, try Frank Wilson's design via http://koti.mbnet.fi/~atjs/mc6809/
(Because my design never worked right :-)
W
>
>Well we have had all the fun with 68K designs, but I would really like
>to build a 6809 system. Any one know of a source for boards for a
>simple system with say Serial Port and Parallel Port and memory?
Buy a color computer or a dragon. It's pretty much a clone of the appnote.
Otherwise, try Frank Wilson's design via http://koti.mbnet.fi/~atjs/mc6809/
(Because my design never worked right :-)
W
More shed cleaning. Unibus boards plus pdp11/23 and an complete pro350
seller tcp1022 (me). As always mention to me your a list member and I'll
throw in a goodie or two.
cheers
tom
