Tuturial to convert a PAL A1200 to Native NTSC A1200

[kipper2k]

Thought i'd share this, its tried and tested to work good...
 
A1200 PAL to NTSC Conversion (this is on a Rev 2B PAL board). A NTSC board can also be swapped over to PAL bt you will obviously have to find a few more components.
 
The following tutorial will explain how to convert a PAL A1200 to a NTSC native A1200
Items that must be altered
 
(T) = top
(B) = bottom
 
- Remove R245 (B)
- Add R246 (T) 2.7K
- Change X1 (T) to a 28.6363MHz oscillator
- Remove Y451 (T)
- Remove C244 (B)
- Add R203 (B) 0 ohm resistor
- Add R225 (B) 0 ohm resistor
- Change R221 (B) to 1.2k
- Change R223 (B) to 1.2k
 
 
Items that may be required to alter
 
C243 removed (T)
L241 removed (T)
Q461 removed (T)
Z221 removed (T)
R243 removed (B)
R244 removed (B)
C244 removed (B)
 
Just altering the upper list of components was enough to convert to NTSC. the lower list will remove extra components from the Pal goodies section of the motherboard that don't appear to be necessary.

enjoy

[kipper2k]

This is sooooo much easier with Atari 8-bits, or at least taking an NTSC one to PAL is. All you gotta do is replace the Antic chip with a PAL one. I'm sure that works both ways, though....
 
I've NO idea why anyone would want to go from PAL to NTSC considering that 99% of the software is PAL. Hence the reason I bought a PAL Amiga even though I live in the land that was previously known as America.

 
 Yah, i agree.  Nice thing is though you can convert your NTSC to PAL doing the opposite