PAL CD32 is B&W on NTSC composite monitor?

[Khyron]

The Chroma Demodulator ICs in the 1701/1702/1802/1080/2080/1084 are all 1 fixed frequency.. either a PAL or NTSC..
Most of the commodore monitors are tolerant enough to sync at both 50/60Hz signaling, but they only understand one color frequency.

If you need composite you can pick up Kippers RGB - Composite adapter and that should do the trick giving you 50 or 60Hz with 3.57954Mhz color .. or if you're the soldering sort..

Looking at the schematics.. You'd need to

Change X1 to 28.6363Mhz
Move R245->R246 (Remove PAL Color osc, NTSC comes right from Chipset)
Remove R205 (Sets CXA1145 to NTSC)
and It'll boot in 50Hz with an NTSC color signal..

R203 (Installed/Removed) will select between 50/60Hz at powerup..

[Khyron]

According to the Commodore monitors page, there's not a single 120V Commodore monitor ever made to support a PAL composite signal.

http://gona.mactar.hu/Commodore/monitor/Commodore_monitors_by_model_number.html

If anyone in the US/Canada has experience getting color from a PAL CD32, please let me know!

If you can solder..
I've modified quite a few A600's and A1200's by changing the crystal and moving the resistors, it's the only 100% way.

You can also build an RGB port for the CD32 the RGB & HV are all easily accessible signals once you open the unit.



There's also PAL <-> NTSC converters, never tried them.. maybe someone can chime on how well they work..
see Dealextreme  SKU 152225 (you can find them cheaper on ebay)

[Khyron]

Well u can quote whatever interwebz quote u want but i can tell thats not factual re read my post above for proof.

The schematics for all the commodore monitors show that they only support one color standard..  Example from the 1702 schematic..
P.9- Only 1 3.58Mhz trap..
P.11 Chroma Dem circuit- Y301 = 3.58954Mhz
No sign of any PAL chroma trap or demodulation circuit..

When you switch a PAL Amiga 600/1200 to 60Hz, you're not swithing it to NTSC, you're just creating NTSC frequencies/scan lines with a PAL chroma signal, so a PAL 1702 will be able to decode the same PAL color.