Hi Michael,I'm not intending to debate here, but just clarify what I was thinking when I asked the question.
What I'm wondering is, if revs 1 and 2 were internal prototypes that were never released. This is purely conjecture, but I figured I'd throw it out there. It is interesting that no one responded saying that they have a rev 1 or 2 board.
Typically, any hardware designer will update rev levels and copyright dates on any new prototype. If that particular prototype meets production standards, it will be rolled into production, with the copyright date and rev level of the prototype. If it doesn't, the board will be modified, the rev level and copyright updated (if necessary) and new prototypes built. I can't say that Apple followed this process, but it was and is standard proceedure for many businesses within the electronics industry. Remember that WOZ was exposed to standard large company process at HP and I would image he would adopt these sort of useful processes used at HP, after he left.
One thing that I think is underestimated in the early success of Apple, is background WOZ recieved in hardware development and production process at HP.
For large, not so nimble companies, rolling new revs into production may take months, for a small nimble company with a fairly simple product, like Apple had at the time, it could occur within weeks.
Regards, Mike Willegal Michael J. Mahon wrote:
Mike Willegal wrote:Take a look at this image from my website. http://www.willegal.net/appleii/images/rev0clone-front.jpgThe most obvious difference is the prototype area from A-11 to A-14, which is greatly reduced in later revs in order to supply room for the chips required to make the improvements mentioned elsewhere.By the time rev3 or rev 4 came out, there were a great many subtle differences in trace placement throughout the board.Another related question I have for the group. Does anyone have a rev 1 or rev 2 board? My rev 3 is copyrighted 1978, and I know Apple was still producing rev 0's well into spring of 1978, so the run of rev1 or rev2's must have been pretty short.Copyright dates are often the date of the "original" from which the work was derived. So a copyright date of 1978 doesn't mean that the board was actually designed in 1978, only that its "daddy" was. Sometimes, a revised work will have the copyright date of the revision added onto its list of copyright dates, but not always. -michael NadaPong: Network game demo for Apple II computers! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."