Search found 1294 matches

by exxos
Fri Feb 23, 2018 7:09 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

I thought I would post this here as I've been puzzling over this for the past few hours... It seems the TIA chip has a different pinout for PAL & NTSC machines. This could be why when I tried my mod originally, it failed miserably as I could have been following a NTSC pinout for the TIA :roll: It is...
by exxos
Fri Feb 23, 2018 4:43 pm
Forum: BENCHMARKS
Topic: STFM PAK020 - 16MHz 32BIT ROM
Replies: 3
Views: 167

Re: STFM PAK020 - 16MHz 32BIT ROM

Quick Q here, I presume the original 68K cpu is removed from the mainboard, and a socket put in it's place, or is the PAK soldered into where the 68K used to be? I had to put it into a socket, simply because as the board is so large it would not seat down to the motherboard as the MMU is in the way.
by exxos
Fri Feb 23, 2018 3:39 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

I may try both approaches, see what turns up, as I have a drawer full of bits to tinker with. That would make my life a lot easier ;) If the 4050 was removed, little plug-in board could be put there tweaks and fixes for the video drive.. Though would still need some wire links for the colour and au...
by exxos
Fri Feb 23, 2018 3:31 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

One thing I don't understand is, if the signal is available there, why remove the modulator? I think it is to reduce interference on the video signals... As to if it actually helps or not I don't know.. But it makes sense to remove it.. As for Q4, I'm assuming that's an audio amplifier that feeds i...
by exxos
Fri Feb 23, 2018 3:14 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

I did look into this several years ago as well.. But basically I used a video generator chip, I think it was to generate RGB signals for scart. I can't remember what chip it was, or I can remember is the results were horrific and I just gave up with it. This page has a few things tried out.. http://...
by exxos
Fri Feb 23, 2018 2:46 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

This caught my attention as well ... http://thevowel.com/blog/2012/06/29/upgrading-my-atari-2600/ Mostly I was just looking at circuit diagram itself... Seems difficult to work out as a seems to be multiple revisions which all look very similar, but the part numbers a very much different.. Not hundr...
by exxos
Fri Feb 23, 2018 2:27 pm
Forum: 8 BIT CORNER
Topic: Atari 2600/7800 Composite MOD
Replies: 12
Views: 45

Re: Atari 2600/7800 Composite MOD

:bravo: I did see that that a few days ago. A lot of them seem to go down the similar route. What I don't really understand is why the transistors even needed because there is a buffer chip in the video with the resistor ladder anyway. A lot of them seem to hack to bits a lot of the circuit, then re...
by exxos
Fri Feb 23, 2018 1:43 pm
Forum: CHAT FORUM
Topic: syringe gun
Replies: 2
Views: 47

Re: syringe gun

Ordered one, seems to fit together well :)

sg.jpg
sg.jpg (85.18 KiB) Viewed 7 times
by exxos
Fri Feb 23, 2018 11:25 am
Forum: 8 BIT CORNER
Topic: 2600 JR replacement switches
Replies: 0
Views: 13

2600 JR replacement switches

2600_jr.jpg While resurrecting my 2600 console from 30 years ago, I noticed it is in dire need of some maintenance and repairs. First of all, the power supply switch was very intermittent and needed replacing. Unfortunately Atari, yet again, seems to have used some custom switch which is impossible...
by exxos
Fri Feb 23, 2018 10:14 am
Forum: CHAT FORUM
Topic: When you have too many emails
Replies: 14
Views: 86

Re: When you have too many emails

:lolbig: