Problem preservating the Amiga version of "P-47" by Firebird

[realmml]

At the end of the Mission Elevator thread, Keir commented:

I have 2 dumps of P-47 and will take a look. I know the ctraw image for both do not boot in WinUAE. The format is rainbird, but it appears that there is something special about the track 0 or both of my versions are bad. I will need to investigate track 0

I have two dumps of the game, in my case the track 0 is normal amigados, but if I try to convert with disk-analyze choosing a Rainbird format, I can not generate a bootable disk. This is the output:

$> disk utilities master>disk-analyse.exe -f "Midwinter" convert/p47a/track p47a.ipf
Side 0:
 T0: AmigaDOS
 T1-2: Rainbird
 T3-4: Unformatted*
 T5-37: Unformatted
 T38-78: Rainbird
 T79: Unformatted*
 T80-83: Unformatted
Side 1:
 T0-79: Rainbird
 T80-83: Unformatted
** WARNING: 3 tracks are damaged or unidentified!

$> disk-analyse.exe -f "Midwinter" convert/p47b/track p47b.ipf
Side 0:
 T0: AmigaDOS
 T1-2: Rainbird
 T3-4: Unformatted*
 T5-37: Unformatted
 T38-78: Rainbird
 T79: Unformatted*
 T80-83: Unformatted
Side 1:
 T0-79: Rainbird
 T80-83: Unformatted
** WARNING: 3 tracks are damaged or unidentified!

You can find my dumps here:
P47 Dump A
P47 Dump B

[keirf]

At the end of the Mission Elevator thread, Keir commented:

I have 2 dumps of P-47 and will take a look. I know the ctraw image for both do not boot in WinUAE. The format is rainbird, but it appears that there is something special about the track 0 or both of my versions are bad. I will need to investigate track 0

That was Keith's comment.

[realmml]

Sorry, yes, it was Keith.

[kkrellwitz]

I will be getting to this shortly. I am able to create a working version from both of your dumps I just need to better understand the protection track and recreate properly.

[realmml]

Thanks Keith! :)

[kkrellwitz]

@realmml This has turned out to be a bit more difficult than I expected. Looks like Tracks 3.0 & 4.0 have a type of speedlock. I am not familiar with speedlocks, so maybe @keirf can take a look at this. In the mean time I will take a look at a decoder for a supported game that uses a speedlock and try to figure it out.

[keirf]

It is Speedlock. I can't see any twist to its use here on the protection tracks at all. I haven't looked at the protection code for P-47 however.

I did comment a Speedlock once, long ago https://github.com/keirf/amiga-stuff/blob/master/cracking/protections/speedlock_Dragons_Breath
Some of the comments are surely wrong (eg. Speedlock "sectors" aren't as long as I thought when commenting that disassembly).