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It's a Revision 3, was Re: Notes on Cleaning and Repairing an Apple II Plus
- Subject: It's a Revision 3, was Re: Notes on Cleaning and Repairing an Apple II Plus
- From: dog_cow@macgui.com (D Finnigan)
- Date: Thu, 12 May 2011 18:15:54 +0000 (UTC)
- Newsgroups: comp.sys.apple2
- Organization: Mac GUI
- References: <4db70508$0$6761$9b4e6d93@newsspool3.arcor-online.net>
- User-agent: Mac GUI City Usenet Posting
- Xref: g2news1.google.com comp.sys.apple2:21782
Linards Ticmanis wrote:
>
>> It is definitely pre-rev 7. You can either use the proto area in the
>> lower right corner of the board (slots on top) to wire up the enhanced
>> color burst gating that was pre-installed on the rev 7 board, or you
>> can try a different color monitor, hoping for one that is less sensitive
>> to color burst leakage.
>
> Actually the reliable interim fix didn't happen until Rev. 8 or 9
> according to Jim Sather, and the final fix came with the RFI board. I
> had to do the fix on my Rev. 7 board to get it to play with a particular
> TV set, putting in an extra 74LS04 if I remember correctly. Which I then
> also used to get rid of the infamous "orange line" at the left edge of
> the screen.
>
I finally got the II Plus back last weekend, and I pulled out the 6502 to
check. It's definitely a revision 3 board.
820-0001-03
Old-school, a little out of date, but who cares? That's the whole point of
the Apple II. If it's easy, then you're doing it wrong. :-)
--
]DF$
Mac GUI Vault - A source for retro Apple II and
Macintosh computing.
http://macgui.com/vault/