M200 interfacing

From: Sellam Ismail <foo_at_siconic.com>
Date: Sun Dec 29 01:32:01 2002

On 28 Dec 2002, Frank McConnell wrote:

> No. Symbol characters do not follow this rule, for example the period
> character '.' is encoded as punches in rows 12, 3, and 8.
> You should assume that any combination of rows may be punched. As a
> general rule, I think you'll find that for cards containing printable
> characters, no more than 3 punches are made in any column, but I don't
> think you can assume this for cards containing binary data.

That's what I feared. I'll have to come up with an elegant way to decode
the data.

> Doug Jones has a page that you should look at:
> <http://www.cs.uiowa.edu/~jones/cards/codes.html>
> ...but I can't get there right now, so you might need to look in
> Google's cache (long URL w/wrap):
> <http://www.google.com/search?q=cache:AeJS4EmmG4gC:www.cs.uiowa.edu/~jones/cards/codes.html>

Just what I was looking for! Thanks!

Sellam Ismail Vintage Computer Festival
International Man of Intrigue and Danger http://www.vintage.org

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Received on Sun Dec 29 2002 - 01:32:01 GMT

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