Greetings, wise ones! Does anyone know if the Dreamcast external bus connector (for the modem / BBA) is a standard part number ? E.g. is it a custom SEGA commissioned connector or is it an obscure mass-produced (e.g. purchasable) connector ? I'd love to know (if anyone does) ! Also more importantly I've realized: Is there any complete documentation for the G2 AKA Parallel bus pin-out anywhere? As far as I can tell ~ what little documentation is incomplete and fragmentary.
Could you not just remove the connector from a modem adapter if you need one? I'm pretty sure it's a custom Sega comissioned connector. I think there was a site somewhere documenting a guy making his own devices to go into that port and I think he had some sort of pinout diagram. Someone else here might know what I'm talking about. Sorry I can't be more helpful
That would be here: http://webcache.googleusercontent.c...f17.aaa.livedoor.jp/~takotako/g2bus.php#g2usb
Yep, already got that info. I still doubt its proprietary ~ but probably true that it isn't produced anymore. Guess I'll just cannibalize some modems...:gravedigging: Isn't it funny all of a sudden there is a lot of interest in the Dreamcast? P.S. Yes, its for a special project. ;-) SEGA Schematics Data (no legends yet): 1 : +5V 2 : +5V 3 : +5V 4 : +5V 5 : G2_MDMCSN 6 : G2_IRMDMIN 7 : G2_RODEVN (RQDEVN ?) 8 : G2_ROEX1N (RQDEVN ?) 9 : G2_ROEX0N (RQEX0N ?) 10 : GND 11 : GND 12 : GND 13 : G2IREXTN 14 : G2_BLN 15 : G2_STN 16 : G2_BMN 17 : +3.3V 18 : +3.3V 19 : +3.3V 20 : G2_DSN 21 : G2_FRN 22 : G2_TRN 23 : GND 24 : GND 25 : G2_AD15 26 : G2_AD14 27 : G2_AD13 28 : G2_AD12 29 : G2_AD11 30 : G2_AD10 31 : G2_AD9 32 : G2_AD8 33 : G2_AD7 34 : G2_AD6 35 : G2_AD5 36 : G2_AD4 37 : G2_AD3 38 : G2_AD2 39 : G2_AD1 40 : G2_AD0 41 : GND 42 : GND 43 : CLK 44 : GND 45 : GND 46 : G_RST 47 : GND 48 : GND 49 : MIDIOUT 50 : MIDIIN For pins - 7 : G2_RODEVN (RQDEVN ?) 8 : G2_ROEX1N (RQDEVN ?) 9 : G2_ROEX0N (RQEX0N ?) I'm not sure which makes sense - I think its Request Device N... RQ - more sense than RO... If I figure it out I'll update this. Also, those MIDI - In/Out ports are news to me, might it be fun to plug your dreamcast into a Synth ?
Currently researching the pertinent information. If anyone reading this knows how the MIDI works on the AICA ~ I'd love to know if you can control the chip thru the MIDI port?
What I'm working on is a G2 Bus to SPI interface, with a few limitations. Anyone know where I can get some modems/dummy cards cheap (for the 50 pin connectors) ?
Ask in the marketplace request, probably quite a few people here with DCs that don't use the modem adapters.
You should also check your local cash converters, they usually sell them for next to nothing since they are pretty much useless to the average guy. Only used as a dust cover and for the seamless look on their DC.
