How To Make A old 2600 PCB take a 2732 EPROM

[Shawn]

Hey All,

 

I wanna recycle some of my dirt commons but I have not inverted the signal on a 2600 cart as of yet. If someone would kindly post what leg goes where on a 7404 HEX inverter onto the PCB that wuld be great. I actually have 7404's now so I'm ready to rock. I'm making 4k games. The boar dI have the most of is C011885 Revision E & F boards. The most of them are Rev F.

 

Thanks In Advance,

 

Shawn Sr.

Edited December 7, 2005 by silver_surfer

[Shawn]

I have read this info already but it says you need to cut traces on the PCB when using a 2732 EPROM and I don't knwo what traces to cut. Aside from that I'm ready to go as I know the rest (i think). pin 24 goes to 5 volts (pin 14) on the 7404, pin 12 goes to ground (pin 7) on the 7404. pin 20 goes to input gate 1 (pin1) on the 7404 and the output gate (pin 2) goes to the pcb where pin 20 normally is. Assuming all this is correct I just need to know where to cut what traces.

 

http://www.atarionline.com/ataricart.html

[Bruce Tomlin]

Here's the instructions I wrote up recently when I was hacking up a few C011885 Pac Man boards...

 

solder side, cut curvy trace (A12) to pin 20 (CS)

solder side, cut trace from pin 21 (A11) to pin 24 (VCC)

solder side, cut trace (A11) to pin 18 (CE)

connect pin 18 (CE) to ground

connect A11 trace to pin 21 (A11)

connect A12 trace to 7404 pin 6

put 7404 upside down with 14 on 24 (VCC), 8 on 20 (CS)

connect pin 7 of 7404 (GND) to ground

 

It's more work than it should be because that board uses a 2532 pinout.

 

Oh yeah, and after you get it working, you probably want to use hot glue on the 7404 pins to keep it physically stable, and to keep things from shorting out by accident.

Edited December 7, 2005 by Bruce Tomlin

[Shawn]

Here's the instructions I wrote up recently when I was hacking up a few C011885 Pac Man boards...

 

solder side, cut curvy trace (A12) to pin 20 (CS)

solder side, cut trace from pin 21 (A11) to pin 24 (VCC)

solder side, cut trace (A11) to pin 18 (CE)

connect pin 18 (CE) to ground

connect A11 trace to pin 21 (A11)

connect A12 trace to 7404 pin 6

put 7404 upside down with 14 on 24 (VCC), 8 on 20 (CS)

connect pin 7 of 7404 (GND) to ground

 

It's more work than it should be because that board uses a 2532 pinout.

 

Oh yeah, and after you get it working, you probably want to use hot glue on the 7404 pins to keep it physically stable, and to keep things from shorting out by accident.

977779[/snapback]

 

 

Umm, you got a picture