+x=usr(1536) Posted November 14, 2020 Share Posted November 14, 2020 Searched both here and elsewhere, but didn't come up with anything concrete - so here's the question: Has anyone ever managed to get an Atari CX-75 Light Pen working with a Vectrex? I recently picked one up from B & C simply because I'd never had one of the Atari light pens BITD, but don't have any CRTs at present. I do, however, have a Vectrex coming back to me after Christmas, so figured this would be a good time to ask. 1 Quote Link to comment Share on other sites More sharing options...
SiLic0ne t0aD Posted November 23, 2020 Share Posted November 23, 2020 Interesting. I don't recall anyone modding one to work on a Vectrex, but I just picked up a cx-75 super cheap and am going to try to work my magic on it. The cx-70s seem a lot harder to come by, unfortunately. 1 Quote Link to comment Share on other sites More sharing options...
+x=usr(1536) Posted November 23, 2020 Author Share Posted November 23, 2020 (edited) 45 minutes ago, SiLic0ne t0aD said: Interesting. I don't recall anyone modding one to work on a Vectrex, but I just picked up a cx-75 super cheap and am going to try to work my magic on it. I'll be interested to see where you take this. From looking at the joystick port pinouts on both the Atari and Vectrex sides, I've been wondering if this is as simple as just building an adapter cable. Quote The cx-70s seem a lot harder to come by, unfortunately. I've used (but never owned) the CX-70. The CX-75s are a lot more ergonomic (and usable). Edited November 23, 2020 by x=usr(1536) 1 Quote Link to comment Share on other sites More sharing options...
SiLic0ne t0aD Posted November 24, 2020 Share Posted November 24, 2020 (edited) Shouldn't be too hard to stuff one of these in there. I have a couple, so I'll give it a shot. Either that or maybe the existing circuitry can be converted. I also saw this pic posted online, in reference to the OPL-801DC and its use on a Vectrex. https://www.digikey.com/en/products/detail/tt-electronics-optek-technology/OPL801/1637986 Edited November 24, 2020 by SiLic0ne t0aD 1 Quote Link to comment Share on other sites More sharing options...
+x=usr(1536) Posted November 25, 2020 Author Share Posted November 25, 2020 Hm, interesting. Any ideas on CX-75 internals for comparison? FWIW, the CX-75 is apparently very difficult to disassemble and keep in once piece. Never tried it myself so have no idea how complex it actually is, but that seems to be a common theme when I've looked into it. Quote Link to comment Share on other sites More sharing options...
Rolo Posted December 2, 2020 Share Posted December 2, 2020 I built one a couple of years ago. There really is nothing to it. Didn't I post it back then?? Maybe I find some photos. No, just this one: I just built, what is shown at: https://www.playvectrex.com/vectech/mvlp/MVLPv10_200DPI.pdf It's working perfectly. Compare with the schematic of an ATARI Light Pen: https://www.atariarchives.org/ecp/chapter_6.php It's more or less the same. The ATARI-device is activated by an additional pushbutton. Cable connection: description pin Vectrex pin Atari GND 8 8 +5VDC 7 7 OUTPUT 4 6 I made a little switch box, containing a button and a switch, leading the output to pin 4 or pin 6. I can use the light pen together with both devices. I just have a hand drawn sheet, but it is so simple, that it surely will do: -Rolo 3 Quote Link to comment Share on other sites More sharing options...
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