the RGB connector on the genesis

[GiGaBiTe]

i found the heatsink for the 2 power regulators on my crap genesis and the bottom half of the case, but the problem is that the tv out box on the board is toast.

i need the pinouts for the rgb connector on the back of the board, i played russian roulette and got a corrupt picture to display on the screen, but since it didnt have the red blue and green channels on it, it was black and white.

also help on using the serial port on the back of the genesis would help too.

[oompa loompa]

i'll just copy+paste a document that i found on the net that describes the video connector

From: [e-mail] (Dennis Gale Brown)
Newsgroups: rec.games.video.sega

This is an article I wrote last year to post here. I'm posting it again.
This is probably not the best way to hook up the Genesis to a monitor
but it works. I have no clue what the "new" Genesis is like, so this
may or may not work with it.

-------------------------------------------------------------------------------

Here's how I hooked up my Genesis to my NEC Multisync II:

First, I went to Radio Shack and bought the following parts:

274-026 8-pin DIN plug (Genesis end)
276-1427 9 Position D-shell MALE connector
276-1513 Hood for above
278-775 9-conductor wire (sold by the foot; I got 3')

Then I checked out the Genesis Monitor pinout from the FAQ:
(looking at port itself)

_1 . 8 . 7
_2 . . . 6
__3 . . 5
___4 '

(these numbers probably aren't correct but they match my list below!):
1 - Negative Combined Sync
2 - Composite Video
3 - Green
4 - Ground
5 - +5 Volts
6 - Audio
7 - Red
8 - Green

Then I checked out the pinout for the Multisync:

1 2 3 4 5
. . . . .
. . . .
6 7 8 9

2 - Sync
3 - Blue (analog)
4 - Green (analog)
5 - Red (analog)
6 - Ground

(again, numbers are probably wrong, and this isn't the full pin-out, but
it's enough)

After this, it's just a matter of putting things together. Using the
8-pin DIN connector requires some soldering, but the 9-pin connector
I chose can simply have the pins clamped onto the wires.

One note: You may have to bend the pins in the 8-pin connector slightly
to make it fit in the Genesis. I had to bend the middle pin down a bit
and the two top pins outward. After that, no problem.

Final word: Do this at your own risk. This probably isn't the best way to
go about this, but it does work. If your equipment blows up, don't blame me!

Have fun...

BTW, If you have a different monitor, I can't help you. All I can say is that
if it works with an Amiga 500/1000/2000, it probably works with the Genesis
(similar if not identical scan rates),
provided you have the correct pinouts and connectors...


the extension/serial port at the back of some model 1 genesis units uses the same architecture as the joypad ports. you can directly wire a joypad to it (but you'll need the software/game to actually do anything with it). as for all the genesis ports, each has an individual serial port. the baud rates are fixed at 300, 1200, 2400, and 9600 (?) baud, and output ttl logic levels. there's both tx and rx pins, and has a buffer of one byte

[GiGaBiTe]

i got the genesis to output sound and video using pins 1, 3 and 5.

pin 1 - mono sound out

pin 3 - composite video

pin 5 - +5v

had to use 3 wires and alumnium foil XD

now to make a more permenant type connector...

[Tom Maneiro]

Now i need one of these, but for my 32X ;D

I attempted to play with the tiny Genesis-1-to-2 32X video in cable, but i only got no pic, and the half of my TV CRT not working

Does this cable have some pins missing (I also used the cable from a SNES RF switchbox)

[GiGaBiTe]

if you dont have the 32x cable, you can just grab 8 wires, and directly connect each pinhole to each pinhole. or if your brave enough, you can de-solder the genesis connector, and solder the wires in for a better connection, and do the same with the 32x, but that means you could never remove the 32x from the genesis unless you de-soldered the wires again.

if you need the pinouts, here they are for the sega side connector:
pinouts.ru/data/sega1_pinout.shtml

and another set of pinouts for the 32x connector:
pinouts.ru/data/sega2_pinout.shtml

[oompa loompa]

remember not to connect +5v together =D, unless you wanna run it w/o the 32x power supply. isn't really recomended x.x

[Tom Maneiro]

What the heck does that +5v here?

[oompa loompa]

+5v is power output from the genesis

[Tom Maneiro]

I know, but what is the utility of these 5v on a video out?

[MaskofDestiny]

I think the RF adapter might use the +5V to power it's internal circuitry, but I'm just guessing.