Rev 0 boards lack the transistor at F11 near the "COLOR TRIM" potentiometer and do not have markings underneath the 6502 at all. Rev 1 boards may have(?) the transistor near the potentiometer and have markings under the 6502, which will be 820-0001-01 rev 2 is uncommon, rev 3 may have never existed outside of apple? rev 4 is SUPPOSEDLY the last version with the configuration blocks, early 1980 rev 7(?) was late 1980 and did away with the configuration blocks The history of apple2 revisions is horribly incomplete and full of holes. On 6/7/2016 8:06 PM, Evan Koblentz via vcf-midatlantic wrote:
VCFed is doing some fundraising. We're auctioning a fully working and Woz-autographed straight Apple II * and * a fully working and Felsenstein-autographed Processor Tech Sol-20. Both computers are SUPER-CLEAN.
Apple II: http://www.ebay.com/itm/191890608380
Sol-20: http://www.ebay.com/itm/191890605553
We're using eBay to maximize the value since we're a non-profit.
Have fun!
-- Jonathan Gevaryahu jgevaryahu@gmail.com jgevaryahu@hotmail.com