Need a little help (7800 mod rom dump)

[crunchysuperman]

So I'm modding my 7800 to dump roms, following the instructions in the DEVKIT.ZIP file located here. Everything's going fine, but there's some info left out of the instructions when I get to here:

 

5) Take the 74LS04 chip and bend up all but the four "corner" pins (1, 7, 8, and 14).

Piggyback it over the 74AHCT08 or 74LS08 chip which is just above the biggest chip on

the board. Solder down pins 1, 7, and Now bend up pin 8.

6) Strip off the other end of the wire wrap wire and wrap the end around pin 2 of the

74LS04. Before putting it on the 74LS04, thread

 

There is no further mention of pin 14 anywhere, so is it also soldered down, or bent back up? The way it looks, I'm assuming that last sentence in step 5 was supposed to read Solder down pins 1, 7, and 14. Now bend up pin 8.

 

So, if somebody here who has done this already could chime in and set me straight, I'd appreciate it.

[8th lutz]

You may want to post this in the 7800 forum for a response.

[crunchysuperman]

Well, I figured it would belong here, as it's a common method of building a 2600 rom dumper.

[+Mitch]

That's the really old version of the plans, the newest released version is here.

 

Mitch

[Eckhard Stolberg]

There is no further mention of pin 14 anywhere, so is it also soldered down, or bent back up?  The way it looks, I'm assuming that last sentence in step 5 was supposed to read Solder down pins 1, 7, and 14. Now bend up pin 8. 

 

So, if somebody here who has done this already could chime in and set me straight, I'd appreciate it.

981699[/snapback]

You are correct. Pin 14 needs to be soldered down too. BTW, you might want to go here and get the second version of the devkit. It contains newer software. Pin 14 is still not mentioned in the manual though.

 

 

Ciao, Eckhard Stolberg

[crunchysuperman]

Many thanks!

[Bruce Tomlin]

Here's the instructions to my 7800 EPROM mod:

 

http://xi6.com/hacks/7800eprom.html

[Spirantho]

As an aside - I found when I came to modding my PAL Atari 7800 that the ROM was an EPROM anyway... so anyone who's scared of doing such a mod on a PAL machine may actually not need to worry!

[+Mitch]

Yeah, some of the early PAL 7800s had the BIOS on an EPROM. Too bad none of the NTSC ones did.

 

Mitch