Posted By
Csabo on 2011-06-16 09:51:35
| Re: Plus/4 - PAL/NTSC switchable mod
Unfortunately there's nothing specific on that page about what he means. All computers in the 264 family (C=16, Plus/4, etc) are PAL/NTSC switchable by default, without the need of any modifications. So he may be referring to that fact, or perhaps he did mod the Plus/4 in some way, though I'd say the latter is less likely.
The actual switching is done via one of the TED registers. The simplest way is MONITOR, >FF07 08 will switch to PAL, >FF07 48 will switch to NTSC. The BASIC equivalents are POKE 65287, 8 for PAL and POKE 65287, 72 for NTSC.
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