From: matt (galaga_at_paradise.net.nz)
Date: 2004-07-13 12:41:39
ok i'm go to try and convert the sx64 to 100% pal but i just need a little
help.
The crt schematics for this unit would be a big help.
I have a pal to rgb pcb from a tv that just needs +12v and a sandcastle
which i can do via a tda2595 hoz ic & some "one shot timers" etc...
the schematics would speed up the conversion.
if any one have these can they scan them??? please??? :)) and email
them to me?? or post them on http://www.funet.fi/pub/cbm/schematics
thanks all for your input i'll let you all know when have success!
matt
----- Original Message -----
From: "MagerValp" <MagerValp@cling.gu.se>
To: <cbm-hackers@cling.gu.se>
Sent: Monday, July 12, 2004 10:00 PM
Subject: Re: sx-64 pal ntsc??
> >>>>> "M" == matt <galaga@paradise.net.nz> writes:
>
> M> can i mod the roms or replace them with c64 ones??
>
> Yes, you can use standard C64 roms. The only differences in the SX-64
> roms are
>
> * lack of tape routines
> * default to device 8
> * different startup colours
>
> Roms autodetect PAL and NTSC and adjusts the timing accordingly.
>
> M> to fix the 60hz in the 6526??
>
> It's not an issue with the 6526.
>
> M> Or do i need to change the crystals ??
>
> Yes, and the VIC chip, and you might have to do cut a jumper or two on
> the CPU board.
>
> M> and what will that do to the CRT (5" TV NTSC)
>
> It'll show a rolling black and white picture, but you should be able
> to adjust the vertical hold to get a stable image. To get colour you
> will need to replace the video board with one from a PAL unit.
>
> Not that I have tried any of the above, but it should be fairly
> straightforward.
>
> --
> ___ . . . . . + . . o
> _|___|_ + . + . + . Per Olofsson, arkadspelare
> o-o . . . o + MagerValp@cling.gu.se
> - + + . http://www.cling.gu.se/~cl3polof/
>
> Message was sent through the cbm-hackers mailing list
>
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