These 4 files came from a Prolog M900 INS4004 based cpu board.  The 4 EPROMs
were type 1702A, and interfaced to the M900 via the Intel 4008/4009 standard
memory interface chips.  There are also two 4002 RAM chips on the board.

The filename contains the EPROM location on the PC board, and the label is
everything printed on the label, with an underscore after each line.  Also,
for the ROM in location 4, the first two characters on the label are illegible,
and have been replaced with xx.  So, for example, the file:

  prolog_m900_rom_4-label_xx1832c_9105-1_rom4_1200baud-6d49.ihex

is in the socket labeled "4" on the M900 CPU board, and the label reads
like this:

xx1832c
9105-1
rom4
1200baud
6d49

with the xx being unknown characters.

The EPROM reader said the checksum of the buffer was 49, so I'm guessing the
6d49 is a 16-bit checksum.  I've not verified that.

