Sega SG-1000 - mark1,possible to get other video output modes ?

[bigsanta]

Hello,

i live in the UK and i've been lucky enough to get a boxed Sg-1000,i did know it only had an ntscj rf output,but i would like to actually play this console on my  rgb euro tv,instead of just  having it as a collectors piece.

Would it be possible to tap any other video modes from the board,and has anyone actually done that on this system ?

If nothing has been done on the sg console before,how would i go about trying to find any connections that might be available on the pcb ?

thanks

Fraser

[NeWmAn]

Hi,
Do you know what IC does your SG-1000 use to generate the graphics?
I suppose it's one of the TMS 91xx family, used also in the MSX, Colecovision and other computers, since there are a few variants that have different capabilities (RGB, Component), if you can find out what IC your unit use you can see what you can get from it.

[bigsanta]

I'm not familiar with what an IC is or does,but there is a chip near the rf modulator,it's an TMS9918ANL  MHU8327,is that the one?

fraser

[NeWmAn]

TMS9918A, that's the video chip. And I'm sorry but it seems that it does only composite video 
Some info on wikipedia: http://en.wikipedia.org/wiki/Texas_Instruments_TMS9918

[bigsanta]

Thanks for the info,and within that wiki page,there's also a pdf which has the pinouts for the chip,so i'll see what i can do then,and it is a damn shame about it lacking the rgb ,as the computer version of the sg,the sc-3000 does do rgb!

If it goes ok,i'll put the results up for others to follow,and if it blows up ,i won't

[bigsanta]

Went ok ,i took the composite from the ic,and the sound and ground from the modulator(the connections going from the board ,to the rf modulator).

[bigsanta]

Just an update with video ,showing what i recently did ,when updating the mod.

http://www.youtube.com/watch?v=QBTEwwbUcjI

What's up with embedding youtube flash ? The message preview shows the video window,but when you click save ,all that's there in the forum is the link ??