This folder contains the content of the 7 bipolar PROMs on the FD3812
controller board. The file name is the part designator as it appears
on the controller PCB.

  256 x 4 (U15) 
  82S129, 6301-1, 24S10, 7611-5, 29661, 27S21, 74S287, 3621

  32 x 8 (U47, U56, U57, U119)
  82S123, 6331-1, 7603-5, 63S081, 27S19AC, 74S288

  512 x 8 (U72, U73)
  82S147, 6349-1, 28S42, 7649-5, 29621, 74S472

I made a PCB to read these parts on a standard 27xx programmer. For the
27xx pins, I used two 12 pin headers from samTec: BBS-112-T-B. You can
find them at mouser.com (200-BBS112TB). These headers use small round
pins instead of the square 0.025" pins of typical headers to avoid 
damaging the programmer socket. The header is also raised to get above
a ZIF socket handle if needed.

Gerber and drill files are in the file "PROM Adapter PCB Files.zip"

To read parts with the adapter, choose a 2732 part on your programmer.
Insert only one PROM at a time in the adapter. The adapter DOES NOT
ALLOW PROGRAMMING THE BIPOLAR PROM. To buy and program, I use
https://www.hobbyroms.com/proms.html