IBM 2520 card readers

From: William Donzelli <aw288_at_osfn.org>
Date: Sun Mar 24 21:44:27 2002

> Hey folks, there are a couple of IBM 2420 card read/punches
> up for auction along with two IBM 3268-2 dot matrix printers,
> located in Alabama.

I think the 2520 is just a card punch. 2501 is the reader. 2540 is the
combination punch and reader.

Anyway, the 2520 is a bus and tag device. It, along with the 2501, are
unique in that they will hog an entire channel. Because of this, they
units were never mixed with anything else, as a simple card read or punch
job would bring the whole system to a crawl.

William Donzelli
aw288_at_osfn.org
Received on Sun Mar 24 2002 - 21:44:27 GMT