On Mon 11 Sep 2000 at 10:46:42 +0300, Marko Mäkelä wrote: > Maybe I should try to measure the voltages with the cable disconnected, > both from the drive and from the PET. What are the proper levels for > logical '1' and '0' on the IEEE-488 bus? 0 is 0V, 1 is 5V. To make matters interesting, many of the signal names have negative names and there are also inverters in the output path, so if you see ROM code store a 0 in some output port, you have to think a few times to realise what exactly it means ;-) > Marko -Olaf. -- ___ Olaf 'Rhialto' Seibert - rhialto@polder -- Ah only did well at school \X/ land.nl -- tae git intae an O level class tae git away fae Begbie. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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