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25 August 2012, 14:32
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#1 |
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Junior Member
Join Date: Dec 2002
Location: The Streets
Age: 39
Posts: 2,731
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Tiger Road - duff IPF?
I don't know about you guys, but I'm having trouble even getting this game (SPS #1141) to boot up.
Converting to ADF reveals it uses a copylock-encrypted bootblock. No biggie. Only problem is that even this original appears to fail to decode it and boot correctly. I've tried all different kinds of WinUAE configurations (under both 2.4.1 and 2.3.3) with no change in fortune (and it seems this game isn't post-A500 friendly anyway). Did anyone ever test this prior to SPSizing it? |
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25 August 2012, 15:50
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#2 | |
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Going nowhere
Join Date: Oct 2001
Location: United Kingdom
Age: 50
Posts: 8,987
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Quote:
Takes a long time to decode the track, but just checked it and it worked fine, what can I say, you're wrong! 
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25 August 2012, 15:53
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#3 |
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Amigaholic
Join Date: Dec 2009
Location: UK
Posts: 4,678
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Try using 'Cycle Exact' mode in Chipset options of WinUAE!
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25 August 2012, 16:09
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#4 | |
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Junior Member
Join Date: Dec 2002
Location: The Streets
Age: 39
Posts: 2,731
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Quote:
 I would've thought "Approximate A500 or A500/A1200 cycle-exact" in CPU and FPU would've been satisfactory enough, but I guess not. And why does this particular copylock need Cycle Exact to decode anyway? It really doesn't look that different from all the similar ones from its period of release... |
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25 August 2012, 16:17
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#5 |
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HOL/FTP busy bee
Join Date: Sep 2006
Location: Germany
Age: 46
Posts: 31,530
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There is quickstart and for that the 'most compatible' option in WinUAE. One should always try that first before starting quite redundant threads... just my 2 cent.
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25 August 2012, 17:40
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#6 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,506
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Copylock = CPU timing loop = cycle-exact usually required.
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25 August 2012, 22:39
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#7 |
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Cheesy crust
Join Date: Nov 2008
Location: Hawk's Creek
Age: 48
Posts: 1,383
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There are no bad IPFs unless the original is broken, too.
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26 August 2012, 07:10
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#8 |
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Registered User
Join Date: May 2011
Location: Cambridge
Posts: 682
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The usual reason I've found for needing cycle-exact (rather than approx, which is usually good enough for CPU delay loops) is instruction prefetch tricks -- i.e., modifying some part of the immediately following instruction.
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26 August 2012, 07:33
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#9 | |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,506
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Quote:
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