Last weekend I got (myself) an Amiga 600 Rev. 2,only problem.. it was a NTSC version.. not PAL.. Board is MINT..
So I decided to convert the hardware from NTSC to PAL.
Discussed a bit about it with Peter Mulholland & Tristan Zondag about (maybe) just cut pin 41 of the Agnus chip.. Tristan stated that won’t work.. Commodore made an Agnus for PAL and NTSC.. only difference.. pin 41 attached to internal ground or to (internal) pullup resistor.. THAT IS THE ONLY DIFFERENCE.. HUH..?!
So Let’s start.. i replaced the X1 28.6363 Mhz Oscillator and the NTSC Agnus ( 318069-11 ( NTSC VERSION) ) (U2).
Now i have a sort of black & white picture with lines from the composite output..
Before the replacement I had color, but my display, showed me it was NTSC signal..
So now it’s time to add all PAL components to the board, they are not on a NTSC board by default.
Everthing on it’s place.. YEAH we got PAL.. 🙂
Looks pretty good..
Part list to add / replace to the board..
X1: 28.37516 MHz Oscillator ( replace )
U2: Agnus 318069-10 ( replace )
Y451: 4.433619Mhz Oscillator
C243: 1nF ( 1000pF )
C244: 10nF ( 0,01uF )
This is what must be done to get composite working again..
Missing components of the NTSC board
Giana sisters.. on PAL