Cool hack (was Busses vs no busses)

From: Richard Erlacher <richard_at_idcomm.com>
Date: Tue May 9 15:44:07 2000

----- Original Message -----
From: John Foust <jfoust_at_threedee.com>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, May 09, 2000 9:37 AM
Subject: Re: Cool hack (was Busses vs no busses)


> At 08:06 AM 5/9/00 -0700, Marvin wrote:
> > With the multi-colored and higher intensity LEDs

<snip>

> I suspect. I would think a PC's parallel port would be capable
> of driving the data at a suitable rate and cost.

In EPP mode, widely published to be readily capable of achieving speeds
comparable with the ISA bus, it should be VERY possible. With the
associated 8-bit address and 8-bit data bus, it should be quite
straightforward. If you want, you can build a recircuilating FIFO that
coughs up the data ata a rate synchronized with your rep-rate. Then you
play with the rep-rate until you're happy with what you've got. You can
compensate for low mechanical performance by using two or four wands if you
don't like what you get on just one.

Dick
Received on Tue May 09 2000 - 15:44:07 BST