Re: Module 6 (was Re: CiderPress v2.1.0 released)

[Andy McFadden <fadden@fadden.com>]

Andy McFadden <fadden@fadden.com> wrote:
>> Actually, it goes to the BREAK function, which jumps to MON at $FF65 in
>> the monitor ROM and $3F0 in the autostart ROM.  If it's assuming monitor
>> ROM it *might* pick up the stuff at $200, but that looks bogus.  I don't
>> see what good jumping to $ffff will do either.

One last note: I wrote some code to load and relocate the program, but
it didn't work.  It turns out the code is relying on the non-autostart ROM
behavior, i.e. BRK always going to $FF65 instead of through a vector at
$3F0.  Placing $65 $FF at $3F0 allowed the program to start.  Without that,
the BRK went to $FFFF, which would wrap around and eventually hit a BRK
on the direct page, and loop forever.

Before this, I would have said, "the nice thing about these old cassettes
is that there's no copy protection"...

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