HP TSB card

From: Vintage Computer Festival <vcf_at_siconic.com>
Date: Tue Feb 15 10:21:42 2005

On Tue, 15 Feb 2005, Jay West wrote:

> 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.

Oh? Maybe it was too early in the morning, but I didn't see any symbols
under or to the right. I suppose I wasn't paying attention.

> 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.

Have you tried contacting Doug Jones to see if he might know how this card
is coded?

Sellam Ismail                                        Vintage Computer Festival
International Man of Intrigue and Danger                http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers   ]
[ and academia at www.VintageTech.com  || at http://marketplace.vintage.org  ]
Received on Tue Feb 15 2005 - 10:21:42 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:37:38 BST