Hi all, FYI, Christian provided me with lots of pictures of the board, and I have started reverse-engineering it. It's a nice little board that I hope to clone and/or improve.You can find pictures, info, and work-in-progress schematics on GitHub here: https://github.com/sjgray/B700-Hires-Card Steve From: Steve Gray <sjgray@rogers.com> To: cbm-hackers@musoftware.de Sent: Saturday, February 24, 2018 6:16 PM Subject: Re: 710/720 hires board found! Wow, nice! I’d love to see that reverse engineered! Steve > On Feb 18, 2018, at 11:28 AM, vossi <vossi@ceffy.de> wrote: > > Hi, I just found this Hires-Graphics-Extension in a B720. It plugs between > the Char ROM and the Screen Memory. It also plugs in the 74245 buffer U30 - > and the 245 is on the hires-board. It has 32kB dedicated ram. That's enough > for one page with 640x350 resolution monochrom. It had some wires to the > userport... > Has anybody Infos about this extension? > > PS: The 720 is actually dead - so I'm not able to test it... > > Here is a pic: > http://lc64.blogspot.de/2018/02/cbm-710720-hires-board-found.html > > > > -- > Sent from: http://cbm-hackers.2304266.n4.nabble.com/ > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2018-03-08 20:00:02
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