Segher Boessenkool wrote: > The 656* series graphics chip by MOS Technologies were originally > designed to be used in video games and graphics terminals. However, the wildstar in 656* would match all VIC chips from 6560 and forwards, so this passage might relate to the VIC-I only? As far as I know, there only exists one arcade game with a VIC-I chip, a Space Invaders clone that looks quite similar to Avenger on the VIC-20. I understand the 6562 was developed in 1979 and the VIC-40 announced in November 1981. The Color PET and TOI both date to early 1980, at a time when Commodore may have settled to use the VIC-I chip in a computer of their own instead of just trying to find external buyers. While I didn't find a reference on when Charpentier and Winterble begun working on the VIC-II, according to the Wikipedia article the chip was completed in November 1981. By then the VIC-20 was already launched and shown there would be a market for more home computers, so no need to rely on other manufacturers just they seemed to have done with the first video chip. The date Nov 1981 also fits with the Bagnall quote about Yashi Terakura designing the MAX Machine. Wikipedia also mentions that the VIC-II was inspired by the TMS9918 in the TI-99/4 (October 1979) and the GI-8900 STIC found in Mattel Intellivision (test marketed in Fresno, CA 1979). While the STIC chip appears to have existed already in 1978 so Commodore might've obtained some to analyze, I'm not sure the VDP chip would've been found outside TI before the 99/4 launch. It puts the beginning of the VIC-II at earliest very late 1979, more likely early 1980. Best regards Anders Carlsson Message was sent through the cbm-hackers mailing listReceived on 2016-08-03 01:00:02
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