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Forums > CSDb Entries > Release id #172201 : Sound Invasion II
2021-08-29 12:55
bugjam

Registered: Apr 2003
Posts: 2168
Release id #172201 : Sound Invasion II

Is somebody able to reconstruct this release? I can't remember how I made that diagnosis, but perhaps someone skilled gets it to work?
2021-08-31 14:34
ws

Registered: Apr 2012
Posts: 54


block 111 of the file " sound inv. ii " on release/?id=172201 looking like that (1 block full of $4d,$b7...), to me rises worry that something is irreparably broken. the depacker attempts to depack something, though..
http://dl.dataelephant.net/si2test.prg
track 31 sector 0 and 1 of release/?id=172201 have some partially identical content and there are some sectors that seem to belong to no file...
maybe somebody else has some more sophisticated tools for trying to puzzle together the pieces?

best,
WS
2021-08-31 15:06
ws

Registered: Apr 2012
Posts: 54
A little note of caution: some files on that disk create drive head jamming sounds in VICE that would really freak me out if they happened on real hardware. Namely "Sound-Demo III" and what ever it is, that is attempted to load on LOAD"*",8,1
2021-09-02 10:13
Trurl

Registered: Mar 2002
Posts: 45
I extracted the file and tinkered with and got it to run, all the other tunes seem to work but Battle of Britain doesn't. Will upload the file after some more investigating...
2021-09-03 11:30
bugjam

Registered: Apr 2003
Posts: 2168
Great work, thanks a lot!
2021-09-03 14:29
Trurl

Registered: Mar 2002
Posts: 45
I took a real quick peek at the code. The Battle of Britain music data seems to be missing, but there is a subroutine which tries to play it. However, I didn't see a jump to that routine at a (very) quick glance.
2021-09-04 03:05
ws

Registered: Apr 2012
Posts: 54
Oh cool. I'd really love to learn how you did it. Would you be willing to share some insight?
2021-09-05 15:33
Trurl

Registered: Mar 2002
Posts: 45
I extracted the file from the image with D64list. Then it took a few attempts to unpack it since the depackers go bonkers with the corrupt data (Unp64 V2.35 didn't produce a working file.)

Have to take a look at it again, I'm a bit suspicious if the eighth tune was there to begin with. Of course finding an uncorrupt disk would be ideal.
2021-09-05 16:54
ws

Registered: Apr 2012
Posts: 54
Nice tools! Thanks.
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