Question about 2 specific 7800 boards

[PacManPlus]

Hi!

 

I have two boards I would like to put eproms in:

a 7800 Pokey Cart Revision A and a C300595 Revision A

 

Now, For the Pokey Cart there is a spot at U2 for what looks like a hex inverter. I've tried to follow the traces, and it looks like all I have to do is put the inverter in there and it will accept the eprom? Am I correct on this? And will the pokey still work?

 

The 595 is an odd looking cart... It's got a hex inverter in the middle and two other chips on either side. This one looks like I have to reroute some traces in order to get the ability to use an eprom... Anyone have any clues?

 

Thanks in addvance for you help!

 

Bob

[+Mitch]

Hi!

 

I have two boards I would like to put eproms in:

a 7800 Pokey Cart Revision A and a C300595 Revision A

 

Now, For the Pokey Cart there is a spot at U2 for what looks like a hex inverter.  I've tried to follow the traces, and it looks like all I have to do is put the inverter in there and it will accept the eprom?  Am I correct on this?  And will the pokey still work?

 

The 595 is an odd looking cart...  It's got a hex inverter in the middle and two other chips on either side.  This one looks like I have to reroute some traces in order to get the ability to use an eprom...  Anyone have any clues?

 

Thanks in addvance for you help!

 

Bob

892770[/snapback]

 

For the Pokey board, yes that extra spot is for a 74LS04, just remember to remove the jumper W3 when you install the inverter.

 

The C300595 is a 128K supercart board and is probably more trouble than it's worth.

 

Mitch

[PacManPlus]

As Always, thanks Mitch

[Bruce Tomlin]

I've been working on various cart board schematics lately, and I have done the '595, but I haven't done either Pokey cart yet (I've traced out the Commando board, but haven't had the time to make up a schematic).

 

You can find my '595 schematic here:

 

http://atari7800.net/files/files.html

[+Mitch]

I've been working on various cart board schematics lately, and I have done the '595, but I haven't done either Pokey cart yet (I've traced out the Commando board, but haven't had the time to make up a schematic).

 

You can find my '595 schematic here:

 

http://atari7800.net/files/files.html

893035[/snapback]

 

Hey Bruce, you do know that Dan Boris traced out schematics for pretty much all of the 7800 cart boards, right? http://atarihq.com/danb/7800cart/a7800cart.shtml

 

Mitch

[DanBoris]

A while back I created schematics for most of the 7800 cartridge types, you can find them here:

 

http://www.atarihq.com/danb/7800cart/a7800cart.shtml

 

Dan