Re: Need someone to do a little cracking

[Nick Westgate <Nick.Westgate@gmail.com>]

On Jun 4, 11:31 am, Nick Westgate <Nick.Westg...@gmail.com> wrote:
> Anyway, I will have a look at RSVP on the weekend.

Well, I couldn't wait, and the volume FF was a red herring. I don't
know too much about the internals of DOS, but apparently FF ends up
being the same as 0. Pretty confusing the way it throws the volume
number around.

Anyway, you have mail.

Just the simple patch below was applied.
Of course, there may be other checks ...

Cheers,
Nick.

BLOAD DDMOVER
8CE7G ; to decrypt
8C44:AD 05 8C A2 00 60 ; return A = last checked nibble value, X = 0
(just in case)
870D:9A 8C ; set up to simulate the original jump through the stack
UNLOCK DDMOVER
BSAVE DDMOVER,A$8700,L$629
LOCK DDMOVER