On 2024/07/22 12:16 a.m., Tom Hunter via cctalk wrote:
Recently people repeatedly mentioned relay computers.
There is a very nice 8-bit relay computer implementation by Joe Allen. The
computer looks and feels like the microprocessor trainer boards of the 70s.
The CPU is implemented in 83
On 2024/07/17 11:26 a.m., Chuck Guzis via cctalk wrote:
Having just updated my Advance Directives document before going under
the knife and saw, I thought a bit about the subject of estate planning.
My Lovely Wife, were she to become a Lovely Widow has enough trouble
dealing with day-to-day
friend's basement...
John ;-#)#
On Tue, Jul 16, 2024 at 11:38 AM John Robertson via cctalk
wrote:
On 2024/07/16 6:28 a.m., Paul Koning wrote:
>> On Jul 16, 2024, at 9:05 AM, John Robertson via
cctalk wrote:
>>
>> I'm just starting to clean up a NeXT sy
On 2024/07/16 6:28 a.m., Paul Koning wrote:
On Jul 16, 2024, at 9:05 AM, John Robertson via cctalk
wrote:
I'm just starting to clean up a NeXT system that a friend has had in storage
for decades...
I assume the thing has a battery somewhere - I just hope it isn't Ni-Cad!
At that age
I'm just starting to clean up a NeXT system that a friend has had in
storage for decades...
I assume the thing has a battery somewhere - I just hope it isn't Ni-Cad!
This is the original cube, monitor, keyboard (& mouse?), printer,
assorted cables, and a SCSI secondary hard drive box. So far
On 2024/06/17 12:26 p.m., Ethan Dicks via cctalk wrote:
On Mon, Jun 17, 2024 at 1:53 PM Mike Katz via cctalk
wrote:
I remember running this program at school in the mid 1970's.
This runs on 4K Focal '69 without the extended functions enabled. So it
should run on a 4K PDP-8/L.
...
It was
On 2024/04/09 7:53 p.m., Murray McCullough via cctalk wrote:
I had not realized the IBM 360 was 60 yrs. old this month. I worked on such
a computer in the late 60s in Toronto. What one could do with 8 Kbytes of
ram was remarkable!
Happy computing
Murray
One of my early summer jobs as a
On 2024/04/30 10:08 a.m., Anders Nelson via cctalk wrote:
Having grown up with 1.44MB 3.5" floppies, I have a question: is it
possible to use a 1.44MB disk and just format it as a 720K disk?
=]
--
Anders Nelson
www.andersknelson.com
As I recall you had to bulk erase the old diskette and then
On 2024/03/30 7:53 p.m., Glen Slick via cctalk wrote:
On Sat, Mar 30, 2024 at 5:11 PM Jonathan Chapman via cctalk
wrote:
Standard TTL 74XXX is drying up rather quickly. Futurlec still has some
TTL but 7404s are all gone. Even LS is hard to find.
Ours comes from Mouser, between two part #s
On 2024/01/29 12:45 p.m., William Sudbrink via cctalk wrote:
Sellam Abraham wrote:
I think you were fine. That's how you discharge them anyway. You were just
missing the grounding wire :)
Yes, I have one set up for just that purpose. Wire clamped to the shaft with
an alligator at the
On 2024/01/25 6:28 a.m., Paul Koning wrote:
On Jan 24, 2024, at 3:52 PM, John Robertson via cctalk
wrote:
I've been hunting for a while now for OAK PCB mount keyboard switches that I
can't find a part number for. I've attached a product listing for the switch
that shows it pretty well
On 2024/01/24 12:52 p.m., John Robertson via cctalk wrote:
I've been hunting for a while now for OAK PCB mount keyboard switches
that I can't find a part number for. I've attached a product listing
for the switch that shows it pretty well. DPST-NO preferred.
Only $0.40 in the early '70s!
Any
I've been hunting for a while now for OAK PCB mount keyboard switches
that I can't find a part number for. I've attached a product listing for
the switch that shows it pretty well. DPST-NO preferred.
Only $0.40 in the early '70s!
Any quantity considered...
Thanks!
John :-#)#
--
On 2024/01/10 10:56 a.m., Dennis Boone via cctalk wrote:
> According to a warning on the site: "After many years of service,
> hobbes.nmsu.edu will be decommissioned and will no longer be
> available. You the user are responsible for downloading any of the
> files found in this archive
On 2023/12/19 4:26 a.m., Tom Hunter via cctalk wrote:
I just realised that I never followed up on this.
After some research and a few phone calls to manufacturer support lines I
settled on SikaBond SprayFix as the glue.
...
The front panel has now been re-assembled and is fully functional and
Location?
On 2023/11/16 2:24 a.m., Dave Wade G4UGM via cctalk wrote:
Folks,
Trying to reduce the weight in my loft and I would like to donate my HP
Photoplotter to a good home.
. Photos of the plotter and some sample plots are on my OneDrive here:-
Hi Peter,
Thanks, I'll check with Ian if he tried those or not...
John :-#)#
On 2023/08/03 11:58 a.m., Peter Ekstrom wrote:
Hi John,
Would these be what you are looking for?
https://bitsavers.org/pdf/learSiegler/ADM_31/firmware/
-Peter
On Thu, Aug 3, 2023 at 2:47 PM John Robertson via
I sold my Lear Siegler ADM31 recently and the new owner (Ian) has found
that one of the ROMs failed before he could archive it - or it was
defective to start with.
So my question to the list is - does anyone have the ROM codes (there
are three of them) archived?
I don't think Ian is a
On 2023/07/01 1:10 p.m., Sellam Abraham via cctalk wrote:
Don Lancaster passed away on June 7.
https://gilaherald.com/obituary-for-don-lancaster/
I hope his website is well preserved:
https://tinaja.com/
Sellam
web.archive.org has many copies archived:
On 2023/05/25 5:11 p.m., Sellam Abraham via cctalk wrote:
Tom,
You may save yourself some time with this nifty contraption ==>
https://www.ebay.com/itm/303620862566
It's a floppy disk cleaning apparatus. You place the floppy disk into the
frame, apply your cleaning solution and cloth to the
On 2023/04/23 3:16 p.m., Glen Slick via cctalk wrote:
On Sun, Apr 23, 2023 at 3:10 PM John Robertson via cctalk
wrote:
Oh, I am missing two key caps for the ADM31, anyone have spares? Not
sure what is printed on them at this point, but any caps would be better
than missing ones to start
On 2023/04/18 8:48 p.m., Tony Duell via cctalk wrote:
On Wed, Apr 19, 2023 at 2:37 AM Tom Hunter via cctalk
wrote:
... or four $20 power transistors to protect a 10 cent fuse like on the DEC
VR-14 display.
In general the transistor(s) will fail short-circuit, thus taking out
the fuse too.
On 2023/04/23 10:00 a.m., Paul Koning via cctalk wrote:
On Apr 23, 2023, at 12:54 PM, Fritz Mueller via cctalk
wrote:
Hi folks,
I’ve been picking my way through a PDP-8/L restoration lately. I’ve found that
everything in the machine is covered with a uniform layer of dark “soot”
(enough
ly:*
http://www.bitsavers.org/pdf/boschert/Boschert_OL25_Single-Stage_Power_Supply_Maintenance_Manual_May79.pdf
and it was buried on bitsavers - where I went before bothering the list!
Thanks folks!
John :-#)#
On Tue, Apr 18, 2023 at 12:20 AM John Robertson via cctalk <
cctalk@classiccmp.org&g
I've checked bitsavers.org (Al does a great job!), and a number of
forums, but no luck finding schematics for my ADM31 that I am trying to
resurrect. The power supply has issues and I need to identify a blown
out resistor - the switching supply is a Boschert model 1001 date code
7943 Revision
On 2023/04/17 9:12 a.m., Sellam Abraham via cctalk wrote:
My initial reaction is that $2,000 seems a "bit" optimistic.
That being said, I'm surprised to see (on eBay's Terapeak) a couple of
these sold within the past year for around $1,100.
Sellam
One sold on eBay for $2492USD...Apr 6, 2023:
On 2023/03/27 2:10 p.m., Mark Linimon via cctalk wrote:
On 03/27/2023 5:38 PM GMT rescue via cctalk wrote:
have a number of 2764, 27256, have some 27128 I think too
Myself as well, probably down to 1702s. Right now with some current money
trouble they are looking like assets :-/
mcl
I'm
Anyone interested in 3 tapes - has Olympics logo - still in original
wrapping? Ether pick up at my shop or pay for postage and handling...
John :-#)#
--
John's Jukes Ltd.
7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
Call (604)872-5757 (Pinballs, Jukes, Video Games)
On 2022/11/27 1:21 a.m., Rob Jarratt via cctalk wrote:
I have done a little more probing around. I have found that the 7812 regulator
that drives Vstart on sheet 1 of Tony Duell’s schematic is shorted, so I will
have to replace this too. I have not found anything else that looks obviously
On 2022/11/06 8:37 p.m., John H. Reinhardt via cctalk wrote:
So, I screwed up and in my excitement to find a DEC BA123 chassis (and
MVII parts) I bid on an Ebay auction where there is no shipping and
it's "Local Pickup Only". The problem is that I'm near Fort Worth TX
and the MVII/BA123 is in
On 2022/09/19 9:51 p.m., ben via cctalk wrote:
On 2022-09-19 10:18 p.m., Tom Hunter via cctalk wrote:
There are a few US based Ebay sellers of the 74L85.
Tom
But most ebay sellers, from the USA seem to sell a item for $6.00 and
$75 shipping to Canada. China $2 and $3 shipping. With Covid all
Ben, I buy lots of stuff from eBay US sellers and most are willing to check/fix
shipping costs.
If not then I use a drop-box service where the item is shipped to Oregon, and
then reshipped to me for a not too horrible cost.
Lastly, I’ll be back at my shop in Burnaby in a couple of days and
On 2022/07/13 3:00 p.m., Dennis Boone via cctalk wrote:
Folks,
I've belatedly realized that it's going to be a bit of a headache to
implement the old cctalk/cctech crossposting duality under the new
version of mailman.
I seem to recall a discussion about retiring the cctech list and just
There ain’t no such thing as a free lunch!
What did you think would happen with large free email hosts? They round up all
the clients and then do what they like with them.
Google mines emails for data.
I use a private (paid) service via my web site host. I’ve been using it since
around 1996.
On 2022/05/14 10:11 a.m., Rob Jarratt via cctalk wrote:
Hello,
I have found a bad DEC 7474 chip on my M7133 board. Clearly it is a
7474 D flip flop. The problem is I don't know which modern series
would be the best one to replace it with. I am sure I have seen a list
somewhere of modern
On 2022/05/05 10:26 a.m., Toby Thain via cctalk wrote:
On 2022-05-05 1:03 p.m., John Herron via cctalk wrote:
Someone at work pointed this out and I've never really thought about
it. Is
anyone here aware of the decision or reason to use a different 1
character
for the last 1 vs the first 1?
On 2022/04/30 4:28 p.m., dwight via cctalk wrote:
Yep. I didn't know it was now made by someone else. Also look at McMaster-Carr.
You might get a better price.
Dwight
I've used Dow Corning #4 electrical grease for a couple of decades. It
really helps preventing corrosion and reduces heating
Link to image of switch:
https://www.flippers.com/images/Misc/OAK_Pushbutton_Switch-1973.jpg
Thanks,
John :-#)#
On 2022/04/29 2:14 p.m., John Robertson via cctalk wrote:
I've been hunting for a few years for these switches and was thinking
that perhaps folks here may have seen them or even
I've been hunting for a few years for these switches and was thinking
that perhaps folks here may have seen them or even have some they wish
to part with...I've hit all the surplus sites, and poured over old
copies of old Radio Master Parts Catalogue/Encyclopedias - have 7 of
those, from 1971
On 09/03/2016 10:07 AM, Adrian Graham wrote:
On 03/09/2016 17:39, "Jon Elson" wrote:
On 09/03/2016 10:56 AM, Noel Chiappa wrote:
From: Jon Elson
needs new caps since one of the 1000uF 16V ones has bulged badly.
...
If I go up to 25V I can get 16mm diameter which is
On 06/08/2016 3:46 PM, Jay West wrote:
I wrote...
On Thu, Jun 9, 2016 at 6:34 AM, Jay West wrote:
23-E39A9 is still lost to time, afaik. TMSCP - TU81
To which mike replied...
Could that not be reverse-engineered from the boot code in e.g. Emulex
UC17 ROMs? They
On 05/21/2016 10:53 PM, David Collins wrote:
Martin, I might be able to help you as I think we have a 7596A.
Are these EPROMs from the processor PCA? Are you able to tell me which 'U'
numbers they are in the PC board?
I haven't looked at the plotter itself, but the service manual we have
On 05/03/2016 8:51 PM, Jim Brain wrote:
On 5/3/2016 10:48 PM, Chuck Guzis wrote:
On 05/03/2016 08:08 PM, Jim Brain wrote:
60 Hz? Maybe you could give the guys at Prem Magnetics a call. They're
always sending emails offering to do custom work.
http://www.premmagnetics.com/
Yep, 50/60Hz. I
I do know that the Wait signal was used by the Fluke 90 tester so it could be
clamped on top of an in circuit Z80 and run memory and I/O tests while the CPU
was doing its regular operations.
On vacation so haven't easy access to the operators manual for the Fluke 90
though...
John :-#)#
> On
On 04/17/2016 8:11 PM, Brent Hilpert wrote:
On 2016-Apr-17, at 7:28 PM, Noel Chiappa wrote:
Nope, the cylindrical (outer part of the) bearing is a plain cylinder. But
looking at it closely, it's probably not copper, so it might be that Oilite
stuff.
Online images do give a fair idea of the
On 04/15/2016 12:22 PM, John Wallace wrote:
Hi John,
In the apparent absence of other T11-related suggestions, are you aware that
there are a couple of T11-related manuals on Bitsavers, at least one of which
has schematics?
There's the T11 Users Manual, and the T11 Evaluation Module Users
On 04/09/2016 5:29 AM, Noel Chiappa wrote:
> From: Torfinn Ingolfsen
> Most likely a bad solder joint.
That was my first thought, and so I carefully inspected all the pins, but
they all looked good to me. But I suppose it might have been something that
wasn't visually obvious.
On 04/08/2016 8:54 AM, wulfman wrote:
https://www.fairchildsemi.com/datasheets/LM/LM7805.pdf
http://www.ti.com/lit/ds/symlink/lm78l05.pdf ( page 8 gives you the
internals for a low power version )
Nothing in the data sheet saying you cant apply voltage to the output.
As per the low power
you provide enough current it will
probably self destruct.
To me it is simple, the manufacturer says don't do it as you will damage
the device. That is enough for me. If you want to check the internal die
design you can see why this is so.
John :-#(#
On Thu, Apr 7, 2016 at 7:23 PM, John Robert
On 04/07/2016 2:18 PM, Bill Sudbrink wrote:
drlegendre wrote:
Not saying it's going to smoke-out, but it does
seem like a wonky thing to do.
I disagree about "wonky" let me try with more
diagram and less English:
(+8)
|
VIN|ceramic cap
|-][-
___| |
|
On 04/07/2016 2:25 PM, geneb wrote:
On Thu, 7 Apr 2016, Bill Sudbrink wrote:
Maybe I'm overthinking this. If I just put
regulated +5 on the 7805 VIN will it work?
Isn't the minimum input voltage for a 7805, 6vdc?
g.
More like 7VDC input minimum (dropout voltage) for 7805 - there are data
On 04/07/2016 2:03 PM, William Donzelli wrote:
Per his description, the 7805's input will be open. It will not try to
source any current, as it will have none to give.
I suppose there might be a little leakage.
--
Will
If his intention is to bypass the 7805 then it should have both input
On 03/06/2016 6:49 AM, Dave G4UGM wrote:
I think Thunderbird will allow import from the old Netscape mail client.
Dave
I access Giganews via Thunderbird (OSX) - works very well...
The downside is it costs about $8/month, but that is a very small
business expense. Upside is Giganews goes
On 02/16/2016 12:43 PM, dwight wrote:
It is interesting, I have 1702As that were programmed in 1973 sometime
and they still have their data ( used on my SIM4-01 ).
And yes, I have them backed up.
It is interesting that Data I/O has added supply current
checks. I've used many home made pin
On 02/15/2016 11:25 PM, Eric Smith wrote:
On Mon, Feb 15, 2016 at 11:31 PM, John Robertson <j...@flippers.com> wrote:
Rick, if you want to archive these PROMs (highly recommended) you should be
able to find a Data I/O 29B and get one of the programming packs that
supports NS chips. I ma
On 02/15/2016 10:25 AM, Rick Bensene wrote:
Hi, all,
I have a question about old Mask-Programmed ROMs
The part in question is the National Semiconductor MM5231. This part is
a 2K-bit PMOS Mask-Programmed ROM, generally organized as 256x8, but
also can be organized (via a MODE pin)as 512x4
On 02/12/2016 6:55 PM, Jay Jaeger wrote:
On 2/12/2016 5:32 PM, Jacob Ritorto wrote:
Hi,
Seems I have bits 4 and 3 sticking on my Clearpoint QRAM-2-SAB-1 88b
4MB memory in my pdp11/73.
Can anyone offer hints as to how to identify which component is broken
and how to go about repairing
On 02/06/2016 1:29 PM, Paul Koning wrote:
On Feb 6, 2016, at 4:21 PM, Mark J. Blair wrote:
Today I discovered that I hadn't replaced the NiCd battery in time in my Amiga
3000. Pictures:
...
While I begin to figure out how I'd like to perform this repair, I'm curious
about what
On 02/06/2016 1:29 PM, Paul Koning wrote:
On Feb 6, 2016, at 4:21 PM, Mark J. Blair wrote:
Today I discovered that I hadn't replaced the NiCd battery in time in my Amiga
3000. Pictures:
...
While I begin to figure out how I'd like to perform this repair, I'm curious
about what
On 01/21/2016 6:46 PM, Charles Anthony wrote:
On Thu, Jan 21, 2016 at 6:21 PM, Jason T wrote:
On Thu, Jan 21, 2016 at 8:04 PM, Charles Anthony
wrote:
For part 2, personally, I would take movies of the paper tape moving and
doing image
On 01/20/2016 11:22 AM, JC White wrote:
I need to recover some files from a SCSI drive that failed over a decade ago.
Are there data recovery services that can determine if the files on the drive
can be recovered or can actually do such a recovery? Now that I think about
it, I recently also
On 01/20/2016 2:00 PM, Mark Linimon wrote:
On Wed, Jan 20, 2016 at 12:35:22PM -0800, John Robertson wrote:
If the drive's PCB turned out to be the problem, could an identical
drive model act as a donor for a known-to-be-good PCB?
I've done this on modern drives. It is not particularly tricky
On 01/13/2016 4:54 PM, Chuck Guzis wrote:
On 01/13/2016 03:27 PM, William Donzelli wrote:
In the old days, the shitty kit TVs would have continuous tuners.
In prewar days, it seems that there more than a couple of offerings.
Didn't Meissner(they of the "Signal Shifter" VFO) offer a kit TV
I have two sealed C5718A tapes that are free to the first person to ask
for them and pay shipping. I hate to throw out something that may still
be useful.
Can mail them for $5 (I think) to the USA, or local pickup.
John :-#)#
--
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
On 01/05/2016 1:15 PM, Ali wrote:
Anyone know anything about the custom computer and the custom OS? Nor implying
anything but Chuck do u have any insights? ;)
Didn't Scotty leave his laptop behind when they were saving the whales?
John ;-#)#
On 11/28/2015 3:41 PM, Mouse wrote:
Love that term, "bounce buffer" (I wrote a whole package to support
them in a packet switch I did) - I'm officially adopting it, right
now! :-)
Hey - anything that anyone writes is automatically copyrighted.
I realize you...may have been less than entirely
On 10/25/2015 4:37 PM, Adrian Graham wrote:
On 25/10/2015 17:19, "John Robertson" <j...@flippers.com> wrote:
Hi John and others,
Thanks for that. I removed the diodes and wired 2332 (21) to 2372 (24)
leaving the A11 swap in place, the programmer complained about pin 18
miss
On 10/24/2015 5:56 PM, Adrian Graham wrote:
On 24/10/2015 19:18, "John Robertson" <j...@flippers.com> wrote:
On 10/24/2015 5:43 AM, Adrian Graham wrote:
Hi folks,
PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed
thanks to a hot air gun. Holes cl
On 10/24/2015 5:56 PM, Adrian Graham wrote:
On 24/10/2015 19:18, "John Robertson" <j...@flippers.com> wrote:
On 10/24/2015 5:43 AM, Adrian Graham wrote:
Hi folks,
PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed
thanks to a hot air gun. Holes cl
On 10/24/2015 5:43 AM, Adrian Graham wrote:
Hi folks,
PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed
thanks to a hot air gun. Holes cleaned and I have new turned pin sockets for
everything I've removed which I'll be fitting this afternoon.
Since the ROMs came out
On 10/09/2015 4:50 AM, Alexandre Souza wrote:
lucky you. In Brazil we use vote machines made by diebold, which are as
weak in security as a carton box. And no independent entity can ressearch
its failures.
After the fiasco about the Deibold machines changing votes during the
Bush election of
On 09/30/2015 7:14 AM, Jay West wrote:
John wrote
That is an authorized Bob Parker variation of his original Dick Smith ESR meter
kit. On this side of the pond they were made by Anatek until the owner was
killed in an accident, then the series (now called the Blue ESR) is made by
On 09/30/2015 7:14 AM, Jay West wrote:
John wrote
That is an authorized Bob Parker variation of his original Dick Smith ESR meter
kit. On this side of the pond they were made by Anatek until the owner was
killed in an accident, then the series (now called the Blue ESR) is made by
On 09/29/2015 2:59 PM, Jay West wrote:
This is the one I have used for years.
http://clientes.netvisao.pt/greenpal/evb1.htm
About $88 USD
J
That is an authorized Bob Parker variation of his original Dick Smith
ESR meter kit. On this side of the pond they were made by Anatek until
On 09/06/2015 2:00 PM, Alexandre Souza wrote:
Jay, no one is pin compatible, I always make adapters. But at least I make
it work :D
2015-09-06 16:00 GMT-03:00 Jay West :
Alexander wrote...
-
Intersting to note: many times i have used eproms in place of these proms.
On 09/03/2015 4:56 AM, Vlad Stamate wrote:
While I was trying to read the ROM in my 9121 for Eric Smith I found
out that my Wellon VP-280 could not do it (it could not recognize it
and only read FF FF FF FF). I could use it however to dump the ROM of
an IBM PS2 that I cannot boot anymore (so it
On 08/21/2015 5:33 PM, Billy Pettit wrote:
I have a small batch of Data I/O EPROM burners. Trying to test them out and
ran into a nightmare. They require a pin family and size parameter. But in
none of the documentation is there any mention of what these values are. There
are some generic
On 08/04/2015 1:48 PM, dwight wrote:
This all assumes it is a TTL and not an ECL or even
and analog chip, such as an opamp.
Dwight
It might be possible to identify it a bit. Using the Diode Test of your
basic multi-meter you can probably figure out if
On 07/27/2015 7:40 PM, Evan Koblentz wrote:
He did say that they got permission from Sellam (and Erik K.)
Correct. We briefed them both on our plans several months ago and
they're both on board.
Also, a technicality that I neglected to say earlier: MARCH didn't
become the Federation;
On 07/23/2015 2:15 PM, William Donzelli wrote:
That's just seller's remorse.
It's obviously up to you, but I'd have strongly considered disputing it with
eBay as a seller refusing to honor the auction results is every bit as
bad (or even worse) than a buyer refusing to honor the auction result.
failure was caused by static electric shock to the
machine would blow the supply. NO carpets allowed!!
John :-#)#
On 07/17/2015 2:19 PM, Jay Jaeger wrote:
U - his PDP-11/34 most certainly does use switching power
regulators. ;)
On 7/17/2015 4:06 PM, John Robertson wrote:
On 07/17/2015 11
On 07/17/2015 11:53 AM, Mouse wrote:
I do find this witch-hunt against capacitors to be curious, given how
few I've found to have failed. I suspect a lot of it comes from
audiophools who think this is the way to fix anything...
Perhaps. But not all of it, certainly. I'm currently four for
On 07/07/2015 4:44 PM, Chris Osborn wrote:
On Jul 7, 2015, at 4:18 PM, Chuck Guzis ccl...@sydex.com wrote:
using Thunderbird
Which I’ve noticed has problems parsing the
General Discussion: On-Topic and Off-Topic Posts
cctalk@classiccmp.org
No matter which platform anyone is using,
On 05/20/2015 7:15 PM, Richard B. Main, Esq. wrote:
The Intel AFN-00188B Datasheets for 8041A/8741A specify that EA max is
24.5V. The verify mode for PROM/ROM holds EA high at 23V.
The 8048/8748 Datasheets say EA is 32V for 8748 Verify but need only be
+12V for 8048.
Richard
Speaking of old
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