The Future was 8bit

Atari 7800 (PAL) Composite Mod

Atari 7800 (PAL) TFW8b Composite Video Mod

Old page follows TFW8b mod install guide.

Atari 7800 PAL Composite Video Mod

Top hat removed.. This is the corner of the PCB we are interested in.

Atari 7800 PAL Composite Video Mod

Remove L6, R32, R33, R62, Q8 as well as the modulator.

Atari 7800 PAL Composite Video Mod

Don't miss the R32/R33 link. Or you won't hear your Pokey :D

And now.. The old page..

 

Atari 7800 (PAL) Composite Mod

 

To follow up on the 2600 mod, I've dug out a 7800 to see how the cheap and cheezy transistor based composite mod works out.

Right'o, so let's get on with it.

   Atari 7800 Composite Mod

I like the look of these. #Snazzy

Atari 7800 Composite Mod

I didn't show this in the 2600 mod. Big old tin hat removed by twisting the metal tabs.

Atari 7800 PAL Composite Mod

This is the bane of the life of the average 7800. The bloody stupid non standard dc connector. This unit doesn't have a matching PSU, so I'll be getting rid of this little shit quick smart.

 Atari 7800 PAL Composite Mod 

Sinclair Plus 2 

Atari 7800 PAL Composite Mod

Atari 7800 PAL Composite Mod

2.1mm DC pinched from an #Broken Sinclair ZXSpectrum Plus 2. Wired up so I can use one of my own excellent center negitive ZXSpectrum 9v PSU's

Atari 7800 PAL Composite Mod

Ok, so modulator removed. R32, R33, R62 and Q8 (Not sure if that ones really makes a difference). Link between R32-R33 should make POKEY work. (Untested) Video cable pinched from C64DTV :D

Atari 7800 PAL Composite Mod

It's the same transistor mod as on the 2600..

Atari 7800 PAL Composite Mod  Atari 7800 PAL Composite Mod

Neat enouth. I'll be gutted when I run out of old C64DTV video cables..

Atari 7800 PAL Composite Mod

So.. This is what it looked like before the mod. Frankly not too bad, bit of interference/ghosting but better than a 2600 rf by miles

Atari 7800 PAL Composite Mod

And after the mod.. Oh yeah.. Thats seems clearer to me.

 Atari 7800 PAL Composite Mod

And just dandy on my Commodore 1701 :D

....Next.. Atari Jr