Here is an ebay link to a pretty good (IMHO) guide to the data I/O programmers.
http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5574933636&toolid=10001&campid=5336728181&customid=&mpre=http%3A%2F%2Fwww%2Eebay%2Ecom%2Fgds%2FData-I-O-Device-Programmers-A-Condensed-Reference-%2F1
> From: Glen Slick
> the part is listed as DM8598-AD, where a DM8598 is a 256-bit (32x8)
> tri-state bipolar mask ROM.
> Some substitute T.S. PROMs include the Signetics 82S123
On my M8101, it's an 82S123, which is a tri-state programmable PROM (the
82S23 is the open-collector ver
On Fri, 24 Jun 2016, Fritz Mueller wrote:
In bringing up and debugging my PDP 11/45, I found that one of my GRA (M8101)
spares has a failed ALU subsidiary ROM. It's a pretty standard little 32x8
ROM in a 16-pin DIP, and the truth table is in the 11/45 print set.
Some years ago I had to replac
Thanks much for all the info and help, folks!
I'll see about tracking one of the programmers mentioned. I'd like to
have one around in case I run into more parts like these. Was helping a
friend with an old arcade game last weekend, and it had a few parts like
these as well.
--Frit
On Fri, Jun 24, 2016 at 4:36 PM, Fritz Mueller wrote:
> Hi All,
>
> In bringing up and debugging my PDP 11/45, I found that one of my GRA
> (M8101) spares has a failed ALU subsidiary ROM. It's a pretty standard
> little 32x8 ROM in a 16-pin DIP, and the truth table is in the 11/45 print
> set.
>
On 6/24/2016 7:41 PM, Fritz Mueller wrote:
On 06/24/2016 06:28 PM, Don North wrote:
Almost 100% certainty the part already there is a small bipolar TTL PROM.
What would you think it otherwise might be?
For a lot of these logic replacement applications DEC used the open collector
version, but
On 2016-Jun-24, at 7:41 PM, Fritz Mueller wrote:
> On 06/24/2016 06:28 PM, Don North wrote:
>> Almost 100% certainty the part already there is a small bipolar TTL PROM.
>> What would you think it otherwise might be?
>>
>> For a lot of these logic replacement applications DEC used the open
>> col
On 2016-06-24 22:47, Al Kossow wrote:
On 6/24/16 7:42 PM, Josh Dersch wrote:
A Data-I/O 29A or 29B will do the job nicely.
and a Unipak I or II like this
www.ebay.com/itm/301995688339
I have a Data-I/O Series 22 which could do these, plus another burner
that may do them. I haven't checke
On 06/24/2016 06:36 PM, Fritz Mueller wrote:
Hi All,
In bringing up and debugging my PDP 11/45, I found that
one of my GRA (M8101) spares has a failed ALU subsidiary
ROM. It's a pretty standard little 32x8 ROM in a 16-pin
DIP, and the truth table is in the 11/45 print set.
I wonder what th
On 6/24/16 7:42 PM, Josh Dersch wrote:
> A Data-I/O 29A or 29B will do the job nicely.
>
and a Unipak I or II like this
www.ebay.com/itm/301995688339
On Fri, Jun 24, 2016 at 7:41 PM, Fritz Mueller wrote:
> Thanks for the info, Don -- learning a lot about this stuff as I go...
>
> I had wondered if the part might have been a mask ROM rather than a PROM.
> And wrt. timing, I was certainly mistaken to call the nominal interval
> between the clock
Thanks for the info, Don -- learning a lot about this stuff as I go...
I had wondered if the part might have been a mask ROM rather than a
PROM. And wrt. timing, I was certainly mistaken to call the nominal
interval between the clock pulses a microcycle.
So after staring at the flows and pri
On 6/24/2016 4:36 PM, Fritz Mueller wrote:
Hi All,
In bringing up and debugging my PDP 11/45, I found that one of my GRA (M8101)
spares has a failed ALU subsidiary ROM. It's a pretty standard little 32x8
ROM in a 16-pin DIP, and the truth table is in the 11/45 print set.
I wonder what the r
Hi All,
In bringing up and debugging my PDP 11/45, I found that one of my GRA
(M8101) spares has a failed ALU subsidiary ROM. It's a pretty standard
little 32x8 ROM in a 16-pin DIP, and the truth table is in the 11/45
print set.
I wonder what the replacement options are for parts like these
14 matches
Mail list logo
