Hi,
I am working on several projects requiring 2708 and 2716 EPROMs, and
am finding some of my chips will not erase, and some will not take
a program. I've also learned more in the past week than I wanted
to know about repairing Data-I/O 29a/b programmers.
I vaguely remember in the 1990s baking
On Wed, Dec 13, 2017 at 9:08 AM, Mark G Thomas via cctalk <
cctalk@classiccmp.org> wrote:
> Hi,
>
> I am working on several projects requiring 2708 and 2716 EPROMs, and
> am finding some of my chips will not erase, and some will not take
> a program. I've also learned more in the past week than I
When I was at Intel, years ago, I recall the baking was only to repair the
retention of the EPROMs. It was not to fix random failures.
It sounds like your EPROMs have various failures that wouldn't be helped by
baking.
Each time the EPROM is programmed, there is a slight increase in the leakage
Hmm..I've read about that baking in conjunction with 1702A too..but
don't remember the source of that discussion. I know that ppl suggested
it for proms that would'nt program correctly...
Regards,
Holm
dwight via cctalk wrote:
> When I was at Intel, years ago, I recall the baking was only to re
-Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark G
> Thomas via cctalk
> Sent: 13 December 2017 14:09
> To: CCtalk
> Subject: EPROM baking
>
> Hi,
>
> I am working on several projects requiring 2708 and 2716 EPROMs, and am
> finding some of my c
My homemade 8080 CPM machine used a number of 2708 and 2716 EPROMs. that was 40
years ago. This machine is still running and I use it, but since I had trouble
with the EPROMs, I switched to EEPROMs. I would also be interested in hearing
about whether or not baking would work and how to do the ba
The only "baking" I've heard about with EPROMs was *annealing* on the
original prototypes from Intel. I want to say that was before they figured
out UV erasure and were zapping the things with X-rays for erasure. You
won't be doing any EPROM annealing in a home oven :)
It's been my experience that
Oh, and make sure the quartz window is clean :) I've had sticker residue
result in some bits not erasing.
Thanks,
Jonathan
On Wed, Dec 13, 2017 at 12:18 PM, systems_glitch
wrote:
> The only "baking" I've heard about with EPROMs was *annealing* on the
> original prototypes from Intel. I want to
I am back in front of the machine:
The M7856 is set thusly:
1 2 3 4 5 6 7 8 9 10
-- -- -- -- -- -- -- -- -- -- --
S5 DN DN DN UP DN DN UP DN DN UP
S3 DN DN UP DN UP UP DN UP DN UP
S1 UP UP DN UP DN DN UP UP DN UP
S4 UP UP DN DN UP UP DN DN DN UP
S2 DN DN UP DN DN UP DN DN -- --
The M
Jumping over the settings. They seem OK, as you get the AB in Hyperterm.
That 777564 shows 000200 is also correct (as I remember that): it indicates
“transmit buffer empty”.
You can also try it the other way:
* type one character in Hyperterm
* check that 777560 has the receiver buffer
Hello All,
I am looking for a copy of:
Troubleshooting LAN Manager 2 PDF by Michael
Publication date: 10/01/1993
ISBN:155851161X
ISBN13: 9781558511613
I've looked the usual areas and can't find a reasonably priced copy. There
was one on epay for $10 but the day I marked it to watch suddenly
> From: John Welch
> Any thoughts?
Concur 100% with Henk's comments.
There is a manual online for the M9312:
http://bitsavers.org/pdf/dec/unibus/M9312_TechRef.pdf
which will tell you what the other start options are (Appendix C), but see
page 3-1, too. Note especially the bit about h
This one has me scratching my head.
eBay Item 302562153660
Sure, it's a Kennedy 9832 drive mounted in some sort of giant hard case.
Anyone know if this was a modified drive? What on earth would it be
used for?
--Chuck
Personally I can’t recommend any company selling used parts stripped from
surplus equipment but I recall several being discussed in this thread.
My recollection in the 2311 and 2314 class disk drives from IBM, Memorex, ISS
(sold by Itel and Telex), Calcomp, CDC, Ampex, etc all used M series f
eBay Item 302562153660
Sure, it's a Kennedy 9832 drive mounted in some sort of giant hard case.
Anyone know if this was a modified drive? What on earth would it be
used for?
--Chuck
Can't see this item, ut
Tape drives in flight cases (which I assume is described) are normally data
On 12/13/2017 02:49 PM, ANDY HOLT wrote:
>
> eBay Item 302562153660
>
>
> Can't see this item, ut
> Tape drives in flight cases (which I assume is described) are normally data
> loggers or part thereof.
URL: https://goo.gl/LWshxS
Yup it's a big NASA flight case. 8 BNC connectors. What w
On 12/13/2017 4:22 PM, Chuck Guzis via cctalk wrote:
On 12/13/2017 02:49 PM, ANDY HOLT wrote:
eBay Item 302562153660
Can't see this item, ut
Tape drives in flight cases (which I assume is described) are normally data
loggers or part thereof.
URL: https://goo.gl/LWshxS
Yup it's a big
> From: John Welch
> Anyway, 'a' comes over as 000141 and 'A' comes over as 000101.
Good, the console is working.
> CLR
> LAD
> DEP
OK, that loads a '0' (halt) in 0.
> CNTRL+INIT
> CNTRL+START -> reads 02
OK, so it reads the HALT at 0 and stops.
> CNTRL+
Looks like it has the controller built in... 800bpi though, wah waah.
=]
--
Anders Nelson
+1 (517) 775-6129
www.erogear.com
On Wed, Dec 13, 2017 at 8:33 PM, ben via cctalk
wrote:
> On 12/13/2017 4:22 PM, Chuck Guzis via cctalk wrote:
>
>> On 12/13/2017 02:49 PM, ANDY HOLT wrote:
>>
>>>
>>> e
All –
I can’t remember who contacted me originally about potential
enhancements to the APE (Altair Peripheral Emulator) that I have mirrored at
ape.classiccmp.net.
I heard from Frank Barberis and he mentioned that he’d be willing to make
enhancements to the software if ther
According to the documentation EK-M9312-TM-002 M9312 Bootstrap-Terminator
Module Technical Manual
there are two addresses to use for the Console Emulator.
165020 (765020) for Console with Diagnostics SW 1 and 7 on
165144 (765144) for Console w/o Diagnostics SW 1,5,6,9 on
The switch settings
I have bi-directional communication from PC/Hyperterminal. I forgot
about having to tell HyperTerminal to echo characters locally. Anyway,
'a' comes over as 000141 and 'A' comes over as 000101. So far so good.
However, I have not gotten "@"
CNTRL+HLT
CLR
LAD
DEP
CNTRL+INIT
CNTRL+START -> reads
I am much confused as to how to connect TP1, TP2, TP3, & TP4.
there is a wire coming in with spade lugs. One wire is red, one clear, and one
black. Just to be share which color goes to which TP lug?
Sent from my iPad
On Dec 13, 2017, at 8:37 PM, John Welch wrote:
I have bi-directional communi
So far nothing puts ‘@‘, or anything on the screen.
Sent from my iPad
On Dec 13, 2017, at 10:05 PM, Jerry Weiss wrote:
According to the documentation EK-M9312-TM-002 M9312 Bootstrap-Terminator
Module Technical Manual
there are two addresses to use for the Console Emulator.
165020 (765020) fo
On 12/13/2017 10:41 PM, Jerry Weiss wrote:
What is the configuration of jumpers?
I have tried the following:
1 2 3 4 5 6 7 8 9 10
--- --- --- --- --- --- --- --- --- ---
S1 Off On Off Off Off Off Off Off On Off
S1 On On Off Off Off Off On Off Off Off
S1 On On Off
CLR
765000
LAD
EXAM
‘Bus Err’ light comes on.
CLR
765020
LAD
CNTRL+START
Display changes to 165020
Nothing on the terminal.
Do you know which color wire (red, clear, black) goes to which festoon
connector (TP1, TP2, TP3, TP4)?
Don’t want to blow anything up.
Sent from my iPad
> On Dec
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