How to hook up your SEGA Genesis 1 with the SEGA CD 2
This page will show you how to get your SEGA Genesis Model 1 System hooked up to the 2nd version of SEGA CD!
Click on any image to enlarge for a better look.
The SEGA Genesis, what you will need:
METHOD – RCA Connection
SEGA Genesis
(original model MK-1601)
SEGA Genesis Model 1
RCA AV cable
(or RF Switch)
SEGA MK-1602
AC Power Supply
The SEGA CD, what you will need:
SEGA CD
(2nd model MK-4102)
SEGA CD 2 Steel Joining Plate & screw
(optional)
SEGA MK-1602
AC Power Supply
SEGA CD Small RF Shield
(optional)
SEGA CD Expansion RF Shield (optional)
SEGA CD Audio Mixing Cable
RCA Composite Stereo cables
SEGA CD Genesis 1 Expansion plate
(screws)
SEGA CD Base Extension
Before we start running cables we have some hardward we need to install. We will start with the SEGA Genesis.
STEP #1
Lets get this party started by prepping the SEGA Genesis. This is quick and easy. First things first, lets remove the plastic cover from the expansion port. The black panel on the lower right side of the Genesis should just pop right off. There may be a red cover over the expansion port blade inside. If so, remove it, if not then this baby’s been hooked up to a CD in the past!
STEP #2
(optional)
Now lets attach the two RF Shields to the Genesis.
First attach the SEGA CD Expansion RF Shield to the newly opened expansion port on the Genesis. It will clip right in
Note: All RF (radio frequency) Shields are to help block interference, if you don’t have them the system will still work.
Now lets stick the SEGA CD Small RF Shield to the vents on the bottom of the Genesis. You start with the first vent closest to the center of the Genesis. Just pop it on and your done.
STEP #3
(optional)
OK, the final piece. All we need to do is slide the SEGA CD Steel Joining Plate into position on the bottom of the Genesis. It will only fit one way so you cant mess it up. You will see spaces on the bottom of the Genesis where the clips will slid in. If you have the screw, go ahead and screw it in. While this step is optional if you don’t have the part, the Genesis wont be as stable on the CD, so be careful.
OK, the Genesis is prepped, lets get the CD ready.
STEP #4
The SEGA CD 2 is built to hold the SEGA Genesis 2. If you want to add an original Genesis, we need to extend the footprint of the CD. Fortunately, if you have the parts, it is very easy. Here we go!
Now grab the SEGA CD Base Expansion piece and the plate and screws that go with it. Lets go ahead and combine these two together using the clips on the plate and the slots on the expansion piece.
Flip the SEGA CD upside down. Take the extension piece (with the joining plate on it) and attack the two remaining tabs on the plate to the matching slots on the bottom of the CD unit. Now put the screw into the SEGA CD side and you are done. Viola! and new longer SEGA CD!
STEP #5
Al-righty then, we have both the Genesis and the SEGA CD ready to join.
All you need to do is set the SEGA Genesis on top of the SEGA CD. Your gonna insert the exposed expansion port on the SEGA Genesis into the Connector Terminal on the SEGA CD. Place the Genesis on the CD slightly to the left and then slide it to the right. The Steel Joining Plate on the bottom of the Genesis has tabs on the bottom that will lock into the 4 tabs slots on top of the SEGA CD and the Genesis Expansion Port will slide into the SEGA CD Terminal at the same time. You might need to work it a bit, but it will snap into place fairly easily.
BAM, There it is! Go-go gadget CD! But it’s not going to do you any good until we get this baby connected to your TV.
Now lets plug these bad boys up together.
Grab all your cables and read on. First lets take a look at the ports we are going to be using.
SEGA Genesis – Model 1
& SEGA CD – Model 2
Ports and Connections
SEGA A/V OUT:
This port is used for the SEGA Composite RCA AV Cable and runs to your TV.
NOTE: The SEGA Genesis Model 1 does not output sound in stereo from this port. So when we hook this up to a SEGA CD (either model CD) we will be using the Audio Out ports on the SEGA CD itself to supply stereo sound. We will only be using the YELLOW connection on this cable when we hook it up to the TV.
SEGA GENESIS AC ADAPTER:
This is the SEGA Genesis power supply port for the SEGA MK-1602 AC unit.
SEGA GENESIS STEREO HEADPHONE JACK:
This is the headphone port on the front of the original SEGA Genesis. We will use the Audio Mixing Cable, which is just an 1/8″ audio to 1/8″ audio cable about a foot long. This is the standard headphone-jack we are all used to. If you don’t have one, you can get it at almost any electronics store for cheap. This is the only way to get true stereo sound output from the original Genesis to mix with the SEGA CD.
SEGA CD RCA STEREO OUT:
This runs stereo sound out of your SEGA CD using standard composite RCA Cables.
SEGA CD AUDIO LINE-IN:
This AUDIO IN port is used with the Audio Mixing Cable that will be plugged into the headphone-jack on the original SEGA Genesis.
SEGA CD AC ADAPTOR:
This is the SEGA CD power supply port for the SEGA MK-1602 AC unit.
Here’s how everything will look when we are done.
STEP #6
Now we need to run the Audio Mixing cable from the Headphone jack on the front of the SEGA Genesis to the Audio IN port on the back of the SEGA CD. You can clip the wire to the little clip holder on the left side of the Genesis to keep it tight.
STEP #7:
Plug the A/V RCA cable into your SEGA Genesis system.
Attach the other end of the RCA cable to you TV. You could have multiple options available like on the diagram to the right. You can place it in any one that is not in use. YELLOW is always the VIDEO and should be plugged into the YELLOW port. RED and WHITE (right and left respectively) are the sound and should be plugged into the proper color for the cable.
NOTE: If you are going to be using the audio out of the SEGA CD (which you should, see step 6), then you will only need to use the video (yellow cable) on this cord. Leave the audio cable(s) hanging loose and forget about them. With this set-up I recommend using the SEGA CD for the audio out and not the Genesis as the Genesis will only output Mono sound (notice that there is only one audio cable, white, on the Genesis AV cable.)
STEP #8:
Plug the SEGA Genesis Power Supply into the game system.
Now plug it into the wall.
Plug the SEGA CD Power Supply into the game system.
Now plug it into the wall.
STEP #9:
Using the standard RCA Stereo Cable (red & white), Plug them into the correct port on the back of the SEGA CD. Now run the other end to your TV, making sure you place these two audio cables in the same Video Channel that you placed the yellow video cable in on step 6 (see diagram above).
STEP #10:
OK, you should now have everything hooked up correctly. Turn your TV to the appropriate VIDEO SOURCE that you plugged the game system to on the back of your TV. You probably have several INPUTS available from COMPONENT, VIDEO 1 2 & 3 and so on. In the diagram above you would need to change your TV to VIDEO 1. To change to these different video signal options, you usually have a INPUT button on your remote or television. Turn on your game system!
If everything was done correctly you should see either the cartridge game if one is plugged into the SEGA Genesis, or the SEGA CD if no game is inserted.
STEP #11:
Go back to the future in Sonic CD!
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