PROMS but from what ?

[Brent Hilpert]

On 2010 Aug 26, at 2:38 AM, Rik Bos wrote:
>>
>> I aquired a lot of small DIL14/16 PROMS ceramic package with
>> a 8 digit number on it some of the numbers are :
...
>> I can't find any reference about them, so if some one
>> recognizes the numbers or can use them let me know (I've a
>> few hundreds of them) If no one wants them I'm going to
>> archive them in the big metal bin.

Adding to mike's and ethan's cross-refs, I have a large core memory 
module from Burroughs from 1979, the IC's have both Burroughs and 7400 
part numbers on them. Out of your list I was able to cross-ref 3 of 
them, although 2 of those have already been cross-ref'd:

               mike   ethan   brent
2584 0821
2574 6975
2571 5418
2600 1529
1447 3581     7438    7438N  7438J[1]
1447 3540     7410    7410F
2600 1495     7404           74S04F  [2]
1447 3797     9322  SN74157
2600 1487                    74S00F
2603 2623
2625 5562
2554 0888
2600 1495  (listed twice)

([1] over-stamped with 2624 8922)
(ethan's list shows a different burroughs # for 7404)

--

For my own interest, I wish I knew what machine this core memory came 
from. A large plug-in PCB about 18 inches square, with a daughter-board 
containing a folded planar array mounted to it. 32 KWords, 20 
bits/word.