Thanks for the answers. Staring at theese figures from the datasheet, John seems to be right.
As far as I understand, current flows out of Iref through the limiting part down to ground.
But I do not really understand what C4 and C6 is for.

Anyways, I'll use 1K (measured to be 992R) between Iref and ...

Hello Everyone!

I'm new to this forum and I'm pretty much of a layman concerning electronics.
I wanna go into some experiments generating VGA-signals from a breadboard using 74HC-logic, PLDs and such...

Though my question is not directly 6502-related, I still hope that theese nice folks around ...