Commodore 1084S JAMMA test rig

boganvilla

New member
Joined
Oct 17, 2009
Messages
141
Reaction score
1
Location
Melbourne, VIC, Australia
I'm making a JAMMA test rig and connecting it up to a 1084S monitor.
I was going to use the 8 pin DIN TTL connector on the monitor and had a question around the sync.

This connector has V sync and H sync on pins 7 & 8 respectively. Given that the PCB's I have only have 1 sync connection (composite) which sync input on the monitor do I use?
H sync or V sync?
 
Mine looks like this (DB9 connector):

DSC01645.jpg


cc2-2.jpg


And it is wired straight to the comp sync on my JAMMA harness. Here is my pinout...

Looking at the back of the monitor:

Pin Number

1 N/C
2 Ground
3 Red
4 Green
5 Blue
6 N/C
7 Composite Sync
8 N/C
9 N/C
 
Try it on each one... worst you get is a funky screen with no sync.

On the 9" monitor I use on my testbed I had to use a JROK sync cleaner to get the sync signals to where the monitor would like it and sync up. It just didn't like having the composite sync on both H/V pins.

RJ
 
Here's what I have from cut and pasted notes - use 1084 HSYNC and connect that to JAMMA SYNC - You may have to adjust the monitor for some games. If you don't have the round plug, the tip about the sync should get you where you need to go. I've been using 1084 monitors for years on my test bench:

1084s Monitor to JAMMA Connections:

Pick up a five or six pin DIN plug that will fit the back of the 1084s analog VGA socket on the monitor. You hook it up like this to the JAMMA connector:

DIN Pin 1 (Green) to JAMMA N
DIN Pin 2 (HSync) to JAMMA P
DIN Pin 3 (GND) to JAMMA 14
DIN pin 4 (Red) to JAMMA 12
DIN pin 5 (Blue) to JAMMA 13

DIN pin 6 (VSYNC) is not used

Here is the diagram for the 1084s Analog VGA connector:

1084 & 1084S Monitor Analog Connector
6 PIN DIN FEMALE viewed at the monitor
_______ Pin# Signal
/ 3 \ Pin 1 G Green
/ 2 4 \ Pin 2 HSYNC Horizontal Sync
| 6 | Pin 3 GND Ground
\ 1 _ 5 / Pin 4 R Red
\__/ \__/ Pin 5 B Blue
Pin 6 VSYNC Vertical Sync




Best,


Bill
 
Last edited:
I'm making a JAMMA test rig and connecting it up to a 1084S monitor.
I was going to use the 8 pin DIN TTL connector on the monitor and had a question around the sync.

This connector has V sync and H sync on pins 7 & 8 respectively. Given that the PCB's I have only have 1 sync connection (composite) which sync input on the monitor do I use?
H sync or V sync?

I think you want to use the 6 pin DIN on that one. Sorry I don't remember which input takes C-Sync. Though at least one of the 1084 variants required seperate sync. As was mentioned, I would test it on one of the sync pins and if it doesn't work then try the other. If neither works then you probably need to seperate the sync with something like an LM1881 chip.

Mine looks like this (DB9 connector):
And it is wired straight to the comp sync on my JAMMA harness. Here is my pinout...

Hmm, that looks like a 1080.:)

Mitch

Ha, looks like mrbill08 beat me to it.
 
I can't get the din connector to edit correctly - here's what it looks like looking into the monitor rear:

3
2 4
6
1 5
N

N= Notch

If you need more help, pm me with you email address and I can send you pictures of my cable.

Bill
 
I can't get the din connector to edit correctly - here's what it looks like looking into the monitor rear:

3
2 4
6
1 5
N

N= Notch

If you need more help, pm me with you email address and I can send you pictures of my cable.

Bill

Finally got round to trying this and it worked a treat.
I did try to use the 9 pin connector aswell using only the Hsync. Colours didnt seem to match up but he 6 pin DIN connector works fine.
 
Depending upon the model of the 1084, there were some push on push off buttons on the back - you may want to try that.

My 1084 stash is dropping like flies. I brought one of my spares out for an extra test setup and it and another conked out on me after only a few hours of use. I love my 1084s but I think it's time to look for an alternative. I'm seriously starting to think about getting one of those RGB to VGA converters. Just wonder if it will sync up to all the old games and will react the same as the 1084 when a bad board's output is connected. It certainly would save some workbench space and I could mount it to an articulating arm.


Bill


Finally got round to trying this and it worked a treat.
I did try to use the 9 pin connector aswell using only the Hsync. Colours didnt seem to match up but he 6 pin DIN connector works fine.
 
.... I'm seriously starting to think about getting one of those RGB to VGA converters. Just wonder if it will sync up to all the old games and will react the same as the 1084 when a bad board's output is connected. It certainly would save some workbench space and I could mount it to an articulating arm.

Bill

This is what I did Bill - (RGB-VGA) + spare 17" lcd computer monitor. I haven't got the arm for it yet. I asked around here and not a lot of people had jumped on it, but mine has been working out so far, but I haven't had time to test a lot of PCBs, though. Nice, too, that the current stand rotates so I can easily switch vert/horz.

I am also wondering about the sync'ing. I did make my test bench jamma harness so that the video is a plug so I can plug in various monitors. One is the 1084, the other is the RGB->VGA converter. I haven't made one for an actual arcade monitor yet, thats next.
 
Anyone happen to know what works with the 1084 if you have a vertical and horizontal sync? I would guess horizontal connected to the 1084's composite? I tried using the typical db9 rgb connector specs of connecting vertical and horizontal sync up separately with no luck. I suck enough at soldering that it's worth asking rather than just trying it. :)
 
Anyone happen to know what works with the 1084 if you have a vertical and horizontal sync? I would guess horizontal connected to the 1084's composite? I tried using the typical db9 rgb connector specs of connecting vertical and horizontal sync up separately with no luck. I suck enough at soldering that it's worth asking rather than just trying it. :)

My best guess would be yes.
According to this site the pinouts are exactly the same.

http://pinouts.ru/Video/C1084a_pinout.shtml
 
Back
Top Bottom