Re: 1541 -> 2031

From: Marko Mäkelä (
Date: 2000-09-13 06:40:33

On Mon, 11 Sep 2000, Rhialto wrote:

> 0 is 0V, 1 is 5V.

I finally got around to measuring the voltages yesterday evening.  When
the drive was not connected to the PET, the line drivers (75160 and 75161)
had 3.03 volts on the IEEE-488 side and 5 volts on the 6522 side.  The
8032-SK had about 3.3 volts on its outputs.  Could someone actually
measure the voltages e.g. between pins 11 (ATN) and 12 (GND), so that I
know if this is the problem?

I guess my next step is to use a oscilloscope (2 channels, no memory) and
to write a program that exercises the IEEE-488 lines on the PET side.


This message was sent through the cbm-hackers mailing list.
To unsubscribe: echo unsubscribe | mail

Archive generated by hypermail 2.1.1.