[Coco] Re: [Color Computer] Re: Can I use a CM-4 on the Coco 3
lamune at doki-doki.net
Fri Apr 8 12:52:31 EDT 2005
Sylvain De Chantal wrote:
> Ooohhhh...Cool! Mike, do you know how this can be done (modify the CM-4
> to work as a Analog RGB monitor) ? This would be greatly appreciated! =)
Without a detailed schematic it's impossible to say for sure, but
essentially the process would involve removing/bypassing the digital
input circuitry and feeding the analog section of the monitor. It may be
trivial or complex depending on the circumstance.
Also note that technically, the CM-4 and other TTL monitors may not work
at all due to the analog signal from the CoCo 3 being below the
threshold voltage for a TTL circuit. Also the polarity of sync pulses
may be wrong, etc.
I did turn a CM-8 into a CGA monitor with a few resistors and diodes
when I moved into PC-land, so perhaps the sync is close enough to work.
Brought to you by the 6809, the 6803 and their cousins!
Yahoo! Groups Links
<*> To visit your group on the web, go to:
<*> To unsubscribe from this group, send an email to:
ColorComputer-unsubscribe at yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
More information about the Coco