From: Bo Zimmerman (bo_at_zimmers.net)
Date: 2005-08-04 06:11:23
Hmm.. if its some sort of signal that fluxuates between something low and 5v, that explains why I read it on my digital multimeter as 2.5v. I feel like a dummy. Thanks a million William. Now to find out if the atx ps has a similar signal I can use... - Bo > -----Original Message----- > From: firstname.lastname@example.org > [mailto:email@example.com] On Behalf Of William Levak > Sent: Wednesday, August 03, 2005 10:16 PM > To: firstname.lastname@example.org > Subject: RE: C900 and ATX Power Supplies... > > > On Wed, 3 Aug 2005, Bo Zimmerman wrote: > > > However, it was to no avail. I got no video signal from > the computer. > > I had it hooked up to a 1084 (in rgbi mode of course). > > > > I'm at a loss as to where to go next. The only doubt I have in my > > mind about the new power arrangement is whether I properly measured > > that odd > > +2.5V line. Could someone with a C900 find out what the correct > > +voltage on > > the "brown" line is? Or, failing that, what the correct voltage on > > the "brown" line of a CBM-II machine is (610, b128, etc)? > Perhaps I > > measured wrong? > > I don't see a 2.5V line on the CBM-II schematic. There is > +12V, -12V, > *5V, ground, and something labeled 50/60 Hz. This last is inverted, > pulled up to +5V and fed to IRQ0 on the 6525, and TOD on the 6526. > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing list
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