Re: 1541 -> 2031

From: Marko Mäkelä (
Date: 2000-09-17 17:11:49

On Fri, 15 Sep 100 wrote:

> The info is on my site.

Do you mean the document <URL:>?
It is very informative; I printed it out.

> I also did some measuring on the IEEE-signals. The 3.3V is correct.

Good, then it could still be a bad contact or a firmware problem.

> But the ATN signal measured only 1.8V when (H). I know that this
> sounds absurd but I know what I saw.

I noticed from the schematic diagram that some IEEE-488 bus lines were
buffered in a different way from the others.  It also seems that the
Motorola chips will always drive the bus.

> And I also know that the signal was in rest because I measured it
> while running a BASIC program enabling me to toggle every line by
> hand.

Could you e-mail me the program text?


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