Re: Copy Protection of PET cassettes - Flash Attack.

So where is this file?

m

----- Original Message ----- 
From: "Daniel Kahlin" <tlr@stacken.kth.se>
To: <cbm-hackers@musoftware.de>
Sent: Wednesday, August 11, 2010 2:36 PM
Subject: Re: Copy Protection of PET cassettes - Flash Attack.


>
> On Tue, 10 Aug 2010, Bill Degnan wrote:
>
>> I will try this range.  I was able to make a tape, and it looked like all
>> of the code is in place when I compare the disk version with the cassette
>> version, but when I run the program only the main menu loads, something
>> seems to be blocking the rest of the main program to run.  Does anyone
>> actually have two systems hooked up and running the cassette version in
>> BASIC 2?
>
> I've only started it in BASIC 1 and 2 in vice.
> It seems to work in one-system mode. Can't test two-system mode.
>
> I've done a little better here I think:
>
> LOAD"FLASH ATTACK",8
> POKE 1148,143
> POKE 3144,218
> POKE 3145,218
> SYS 1024
> S"FLASH ATTACK",08,0401,2000
> ...or...
> S"FLASH ATTACK",01,0401,2000
>
> This patches away the $03FD/$03FE check from the basic starter and
> removes a $02BC/$02BD zero check from the program running in the virtual 
> machine.
>
> There seems to be a lot of versions of the PET.  The basic part has a 
> number of patches to support two different configurations.  I'm not
> 100% certain which these are but I believe it supports two versions of
> an early ROM (50019 == 0 and 50019 != 0).
>
> /Daniel
>
>
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