14 May
2012
14 May
'12
5:14 a.m.
At least on the later C64, the IEC reset line is diode protected so that
this pin would only reset external devices (disk drives and printers) and
not the computer itself. I don't know if they Plus/4 is like this, but
it's likely.
-Pete
On Mon, May 14, 2012 5:07 am, Kevin Reynolds wrote:
Pete,
We thought about that, but the plus/4 has an external reset button, in
fact, it was about an inch south of this connection. Now, perhaps a reset
induced by another device would make sense, but I can't figure out which
device it could be, or why.
Kevin
Date: Sun, 13 May 2012 18:35:47 -0400
Subject: Re: Commodore Plus/4 Oddity
From: peter at rittwage.com
To: cctalk at classiccmp.org
CC: cctech at classiccmp.org
On Fri, May 11, 2012 5:03 pm, Kevin Reynolds wrote:
I was going through my vintage machines collection and happened to
notice
something strange with a commodore plus/4 I
have.
On the right side, there was an additional RCA connector that I had
never
seen before this.
Opening it up, it appears to only have a wire jumpered from one of its
connections to pin 6 on the serial port.
I can't imagine why someone would do this. Any ideas?
Pictures are here.
http://imgur.com/a/CFUPs
Kevin
That would create a nice easy external reset button... pin 6 of CBM IEC
is
the reset signal.
-
Pete Rittwage
C64 Preservation Project
http://c64preservation.com