ADM-3a Digital Engineering RG512 Vector Graphics Board

[Magnedyne]

I recently scored this on eBay, a Vector Graphics Board for the ADM-3a made by Digital Engineering. It’s compatible with Tektronix Plot 10. The manual can luckily be found on Bitsavers (http://www.bitsavers.org/pdf/digitalEngineering/RG-512_Users_Man_1980.pdf), however mine might be missing ROM 1.
Does anyone else have such a board who could dump the roms for me?
Regarding functionality (without the perhaps missing rom), I couldn’t test that yet since I’ve only got a working ADM-3 board and not a 3a. There’s quite a few differences so I want to figure out first if it could even have a chance of working in the 3.

 

[bucka]

Hi Magnedyne,

I have a RG-512 I got as a surprise bonus with a non-working ADM-3A from eBay. I have two 2708 ROMs instead of one 2716. Yours may be correct as is.

I don't have a ROM programmer or experience with them but should probaby get a reader/programmer/chip tester at some point. Is there an inexpensive path you'd recommend? We should probably dump our ROMs for safe keeping. Happy to share when I do.

New item by James Rhew

photos.app.goo.gl

 

[Al Kossow]

when it rains it pours
i got one as well

Lear Siegler ADM-3 Retro Graphics Board | eBay

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[Magnedyne]

I have a RG-512 I got as a surprise bonus with a non-working ADM-3A from eBay. I have two 2708 ROMs instead of one 2716. Yours may be correct as is.

I don't have a ROM programmer or experience with them but should probaby get a reader/programmer/chip tester at some point. Is there an inexpensive path you'd recommend? We should probably dump our ROMs for safe keeping. Happy to share when I do.

New item by James Rhew

photos.app.goo.gl

Alright that seems good news so far.
Shame I haven't got an ADM-3a Board, only ADM-3. I'll have to make some modifications to the wiring, but it might just work.

 

[Magnedyne]

Hi Magnedyne,

I have a RG-512 I got as a surprise bonus with a non-working ADM-3A from eBay. I have two 2708 ROMs instead of one 2716. Yours may be correct as is.

I don't have a ROM programmer or experience with them but should probaby get a reader/programmer/chip tester at some point. Is there an inexpensive path you'd recommend? We should probably dump our ROMs for safe keeping. Happy to share when I do.

New item by James Rhew

photos.app.goo.gl

I haven't got one either although I should really get one as well.

 

[bucka]

I'm bringing my ADM-3A / RG-512 to the System Source repair workshop on Jan 18 and 19. I hear there will be at least two other ADM-3As there. Come by if it's convenient.

I've been preparing as best I can and ran across this guy on the RG-512. Do any of you have a legible one (or superpowers that tell you the voltage)?

 

[bucka]

LOL, @Magnedyne , you answered my question with your first post. Thanks for an excellent picture!