1088XLD - Custom A8 Computer in 1050 Drive Case

[+LarryL]

7 hours ago, AtariGeezer said:

Okay, so probably PAL.  The one I'm referring to are NTSC, so yours may be ok then...

not probably, for sure PAL 🙂

as written in my initial post

I also mentioned the „PAL color burst“ circuit

 

anyway, I will follow your advice to clean the board as good as possible and then do intensive inspections again

 

one side question:

the main clock circuit has two crystals, one for PAL and one for NTSC

Is it safe to install both of them and use only the jumper to select between them?

or is it better to leave out the NTSC crystal, if I am using PAL anyway?

 

[+mytek]

52 minutes ago, LarryL said:

the main clock circuit has two crystals, one for PAL and one for NTSC

Is it safe to install both of them and use only the jumper to select between them?

or is it better to leave out the NTSC crystal, if I am using PAL anyway?

It was designed to allow both the PAL and the NTSC crystals to both be resident for people that want to be able to switch back and forth (albeit while also swapping out the appropriate Antic and GTIA chips). Although if you only want one video standard, then it's permissible le to leave out one of the crystals.