i want to make an cable for rgb cable for my nms8250 from scart to subd 9 on my commodore 1024 s monitor
it sould like be someting like this but how can i ground the rgb signals on the Sub d on pin 1&2???????


Kind regards poisonic

Just tie all the grounds toghether and be happy )

this scematic is fucked up a bit
so tieing all the rgb gnds and then putting them on pin 1or 2 on the sub d?
would do the trick?

Look at www.hardwarebook.net and you'll find all the pinouts you want. Pins 1 and 2 of the DB-9 are ground, you can tie them toghether to all the R, G, B, Sync and other grounds. All my 1084s and Amigas/MSXs are wired up this way.

thank you

The NMS8250 has not RGB-SCART output? The VG8235 has rgb-scart and aerial output and I don't have any problem to connect it to a Commodore 1081 monitor. AFAIK, the 1084 has the same inputs as the 1081 colour. Simply, I connect it directly, without any special cable or modification.

Yours,

my nms8250 has a scart indeed but an rgb cable would seriously boost up the quality of the picture

Ok, in the VG8235, the scart is also RGB, so I don't need to modify anything. As being always RGB, the quality of the MSX image is impressive.

Also, my 1081 monitor has a switch between CVBS and RBG, so I put it in RGB when I use my MSX.

But if I use an audio video cable instead of a scart cable, I don't have rgb and the image is really poor.

Yours

my monitor is a 1084S

Ok

well i tried to make an rgb cable but some how it does not work did i forget something....????

i conected r,g,b + the ground of r,g,b +rgb status , rgb status gnd,

but is sucks...... its scrolling like hel in all directions.......

repair bas if you read this please help.........

Hey! What about CSync???
ABC of RGB: Connect all these pins in the OUTPUT (in this case, the msx scart) to the INPUT (the loved 1084d):
R (red)
G (Green)
B (Blue)
CSYNC (Composite Sync)
all Grounds tied togheter to ground on the monitor (pins 1 AND 2)

Quote:

well i tried to make an rgb cable but some how it does not work did i forget something....???? i conected r,g,b + the ground of r,g,b +rgb status , rgb status gnd,

You need the SYNC signal also. On the NMS series this is sometimes composite video, sometimes pure SYNC but always required for an RGB monitor. Without it: chaos on the screen!

this is the scart on the nms 8250

1 Audio out (right)
2 Audio in (right)
3 Audio out (left) (+Mono)
4 Audio GND
5 RGB Blue GND
6 Audio in (left)
7 RGB Blue out
8 Status CVBS
9 RGB Green GND
10 NC or Data 2: Clockpulse Out
11 RGB Green out
12 NC or Data 1: Data Out
13 RGB Red GND
14 Data line GND
15 RGB Red out or Chrominance (SVHS)
16 Status RGB/blanking
17 CVBS/video GND
18 Status RGB GND
19 CVBS/video out
20 CVBS/video in or Luminance (SVHS)
21 Socket GND

these r the pins of the commodore 1084 s:
Pin Description
-----------------
1 ground
2 ground
3 red
4 green
5 blue
7 status RGB

how do i need to connect it because its still havin weird behaviour

i understand how to connect the rgb's and the ground but how do i connect the csync&the status rgb ?????????????

because thers not much space left on the sub d

if i hook it on my tv with scart scart its all ok