Posted By
Csabo
on 2005-03-29
15:14:18
|  Re: A couple of Plus/4 questions
Finally, some cool questions. Here it goes:
1) PAL is faster. On NTSC machines, the screen is refreshed more, so there's less time for the CPU.
2) $FF12 bit 4 needs to be cleared, $FF13 points to the high byte of charset address. Example: you have your set on $3800 (very common for C16 games):
POKE 65298, 192 : POKE 65299, DEC("38")
switch back to normal:
POKE 65298, 196 : POKE 65299, DEC("D0") : REM the original set is on $D000
3) The processor is running at normal ("slow") speed by default. If you turn the screen off ( >FF06 0 or POKE 65286,0 ), it's running in "fast" mode, which is good for calculations, but of course you can't see anything.
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