[rescue] SUN 3/50 IDPROM chip replacement

[Jan Liška]

Hello!

I’m restoring an old SUN 3/50M and its IDPROM chip is missing, which results in "ID PROM invalid error" when the machines tries to boot from net.

I found out that the PART # is 520-1295 and the chip is 32 bytes bipolar PROM, probably Signetics 63S080 PROM requiring a special programmer. 

Is there any modern replacement or alternative available?

Thank you.

Jan

sources: 
http://john.ccac.rwth-aachen.de:8000/misc/sun3_60.html
https://archives.retrobridge.org/sun/system-handbook/3.4/Systems/Sun3/CPU_03_IDPROM.html