[Coco] RESET on CoCo 1/2 vs CoCo 3

[John Riddle]

I vaguely remember someone mentioning that there was a way to "force" the
Coco 1 and earlier models of the Coco 2 to reset via a key combination and
pressing the reset button (much in the same way that Ctrl-Alt-Reset will
reset the Coco 3 back to basic).  I think it might have been
shift-break-reset.  Does anyone remember anything like this?  Marty Goodman,
you out there?

John

-----Original Message-----
From: coco-bounces at maltedmedia.com
[mailto:coco-bounces at maltedmedia.com]On Behalf Of Arthur Flexser
Sent: Saturday, January 24, 2004 2:55 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] RESET on CoCo 1/2 vs CoCo 3


A lot of software uses this the technique of resetting back to itself as a
copy-protection tool, to make it harder for someone to break out and
resave an unprotected copy.  This protection is done by replacing Basic's
reset vector at $72 with something that points to the program's entry
point.  The only thing you can do is to find the place in the program that
does this and knock out that instruction, or the one which stores $55 to
$71, also required for this technique to work.

Art

On Sat, 24 Jan 2004, Perry M Dueck wrote:

> Hi all,
>
> Although I owned a CoCo 3 system in 1987 to 1994 (and again from 2001 to
> present and probably forever henceforth), I only recently have come into
> ownership of a few CoCo 1 and CoCo 2 computers.
>
> Being primarily a CoCo 3 user, it was natural to hold down ALT  CTRL  and
> press RESET to break out of programs and "reset" the entire machine to its
> original power up state, and start fresh without powering the computer off
> and then on again.
>
> With a CoCo 1 and 2, and certain software, when I want to break out of a
> program, I'll press the RESET button on the back of the machine, but then
> it sometimes will throw the computer back into the program I was using
> (again, some software will do this, other software will not). This leaves
> me with the only option of powering down the system, waiting for a bit (as
> is customary with powering electronics off and then back on), and then
> switching the computer back on to start off "fresh".
>
> Is this sequence of events on the CoCo 1 and 2 my only option for
resetting
> the machine in certain situations, or is there some key combination I can
> use together with the RESET button (similar to the CoCo 3's  ALT  CTRL
> RESET) to reboot the computer completely? Or perhaps some POKE commands I
> can enter before loading and executing software with would otherwise not
> allow me to break out of the program by simply pressing the RESET button
on
> the back of the computer?
>
> Thanks for your advice/comments.
>
> best regards, Perry
>
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>


--
Coco mailing list
Coco at maltedmedia.com
http://five.pairlist.net/mailman/listinfo/coco