Does anyone know the programming scheme used in the old CW IDer, like the
CSC CWID 51B?

This uses a 32 x 2 Bipolar PROM with the ID programmed into it.  I can read
the existing PROM, but can't figure out the scheme they are using.  CSC has
been no help.

What's in the PROM is:

00 - 04 E8 A8 28  <- Bytes 00 thru 03
04 - 04 E8 A8 28  <- Bytes 04 thru 07
08 - 04 E8 A8 28
0A - 04 E8 A8 28
10 - 38 B8 A8 E8
14 - 38 B8 A8 E8
18 - 38 B8 A8 E8
1A - 38 B8 A8 E8

Somehow this corresponds to "DE KQH313"

The chip is supposed to be able to store 4 callsigns, and I believe this
chip was programmed with the same call 4 times (why it repeats itself).
Also the 4 Most Significant Bits of each byte appear to be timing in the
logic, which is why the first one is an x4, and the rest are x8.  That means
that:

0 E A 2 3 B A E = DE KQH313 (In Morse Code of course)

Any ideas?




 

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