On 08/13/2016 10:22 AM, smf wrote: > On 13/08/2016 06:51, Gerrit Heitsch wrote: >> You could still switch by software though. I think the pin was needed >> for Vbb. > > Yes you can still switch via software, I said "PAL and NTSC specific > versions" not "fixed to PAL or NTSC". > > Vbb (which I think is for the back bias generator) rings a bell. I don't > know why they needed it and earlier ones didn't. The only explanation I can come up with would be higher yield if Vbb was buffered by an external capacitor. Someone said that Commodore was maybe the first company to use this trick and by now it's standard in the industry. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2016-08-13 10:00:03
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