HP TSB card

[Jay West]

Sellam wrote...
> For any of the numbers or symbols, as you figured you just mark it.  To
> get one of the letters inside the number cells, you mark the cell with the
> letter you want and then, in order from top to bottom relative to where
> the letter is, you mark either the &, - or 0 cell.  So for examp,e, if you
> want an A, you would mark the 1 and & cells; for J, the 1 and - cells; and
> for /, the 1 and 0 cells.

Yup, that part I remember. That will get you any of the symbols on the left. 
But I'm not sure how to get the symbol under the number, or the symbols to 
the right of the number.

Of course, with &,-,0 there are 8 possible combinations, and in each box 8 
symbols. 3 on the left, the number in the center, the symbol under the 
number, and then the three symbols on the right. So it's a fair guess the 
other symbols are marked with some combination of the &,-,0 marks.

I did gander at the card reader driver in the TSB source, and the coding for 
this is in there. For the three symbols on the left the code is obvious. The 
other symbols the coding is less obvious, but definitely there. If I get 
time I'll revisit the source to elucidate the pattern, but it will probably 
be simpler to wait till I refurb the 7621 and just mark a card with the 
combinations and run it through.

Jay