Thanks for the info --- Ω -- regarding RXB, at the moment i am concentrating on the history of this board .
I found this also from Micopendium 1994/03
A Cartridge using generic EPROMs for any number of programs, similar to the PGRAM produced by the late John Guion,
is available from Don O'neil of Western Horizon Technologies " for a modest Fee"
I have looked in various Cartridge lists produced in other threads here, but WHT is not mentioned.
Does the above description of a cartridge ring any bells with anyone ?