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Disk fastloaders PAL broken in NTSC, why?
2013-11-20
12:27
Flavioweb
Registered: Nov 2011
Posts: 447
Disk fastloaders PAL broken in NTSC, why?
I'm studing some fast loaders code, and noticed that some loaders that turn off vic using D011, works in PAL but stop working in NTSC...
Why?
Since there are no badlines or sprites actives, but irqs still alive (no SEI in code) both in PAL and NTSC, what is the reason?
2013-11-20
12:35
chatGPZ
Registered: Dec 2001
Posts: 11146
the timing is tight, and the cpu clock is different.
2013-11-20
15:39
Flavioweb
Registered: Nov 2011
Posts: 447
Quoting Groepaz
the timing is tight, and the cpu clock is different.
So computer is faster but drive work at same speed?
2013-11-21
02:19
Fungus
Registered: Sep 2002
Posts: 629
Yes, computer is 1.02 mhz (vs 998khz) and drives remain 1mhz exactly.
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