2600 Composite mod

[exxos]

So its possible I might have planned on the MAX7453 For the output buffer as I just found a pack of them in the bottom of my drawer...


Looks like FMS6146-D was the one I actually had named on the PCB...and the chip I actually fitted...

I think the problem here was I labelled the chips the wrong way round on the PCB design file :roll:

[exxos]

8-)

3.jpg

Will dig out the 2600 tomorrow and see what state I left it in last time :lol:

[rubber_jonnie]

Tonight or tomorrow then!

Oh, wait, Phil will kill it so I'm OK 😁

[PhilC]

Tonight or tomorrow then!

Oh, wait, Phil will kill it so I'm OK 😁

Yeah, imean, I'm not even sure I have either of those chips. Wonder what I have that size with that many pins?

[rubber_jonnie]

Found mine, and the chip that is not installed :)

Should have the rest of the bits in my parts drawer. No pressure Phil :)

[PhilC]

Found mine, and the chip that is not installed :)

Should have the rest of the bits in my parts drawer. No pressure Phil :)

Good luck RJ, in reality mine will probably be next week as I've a PLC/HMI to program for work and a Mega to upgrade to 4mb, let alone all the DIY my wife has planned for my week off next week.

[rubber_jonnie]

Found mine, and the chip that is not installed :)

Should have the rest of the bits in my parts drawer. No pressure Phil :)

Good luck RJ, in reality mine will probably be next week as I've a PLC/HMI to program for work and a Mega to upgrade to 4mb, let alone all the DIY my wife has planned for my week off next week.

I know all about the DIY thing, we want to move so need to start planning the tidy up of the house in preparation. Last xmas I spent almost my entire 2 weeks off tiling the floor in the kitchen, hall and bathroom!! The result was good though, but really put a crimp on my retro activities!

Will post photos when I progress.

[exxos]

Finally found the previous hack job system I was experimenting with..

I think what I did was remove the RF originally, but then I put it back in the bodged way so I can actually make sure the console was running as the output from the S-Video board was questionable a lot of the time :lol:

So I will remove this board first, then solder a header strip onto the TIA so I can put my board in .. And then watch the magic smoke escape...

IMG_4083.JPG

My board was trying to bring order to the chaos above, it probably will not end well :lol:

[rubber_jonnie]

I know on the comp mod I did (3 resistors and a transistor), I had to remove the modulator and pick up the composite from a pad on the main 2600 PCB.

Is there a requirement to remove the modulator with your design? Sorry if I've asked this before, but a lot of time has passed since we first started with this.

[exxos]

I know on the comp mod I did (3 resistors and a transistor), I had to remove the modulator and pick up the composite from a pad on the main 2600 PCB.

Is there a requirement to remove the modulator with your design? Sorry if I've asked this before, but a lot of time has passed since we first started with this.

Modulator causes a lot of interference, so you really have no choice but to remove it. It's one reason my design tapped directly into the TIA itself ( then every component after it relating to the video gets removed and replaced) .