IBM 6094-020 Lighted Program Function Keys

[Ensor]

Hi,

  > I don't have control over the code - it's probably burned
  >into this variant of the MCS-51....

That's pretty much a given, the 8051 family came with internal ROM (the 8031 
family were pretty much 8051s without the internal ROM).

  >....Even if I have the bps rate wrong, I should still some
  >garbage flowing across serial interface.

I wouldn't make that assumption so quickly....perhaps you have to send some 
sort of initialisation string to the unit before it'll send any output?


  TTFN - Pete.