Just finished my UOROM devcart! =D

[tokumaru]

Hi all!

I'm just posting this because I'm very very happy that my UOROM cart worked so well. I got a konami UNROM cart and extend it to use 256KB of ROM, making it an UOROM cart. I also installed a mirroring switch.

Here are some pictures of the mess:


This is my "workbench" after I just finished the board


A close up of the board


The back of it


A close up of some bent pins, so that hayabusafmw knows what they look like


The cart on my NES (there is no way that will fit a game case)


It runs regular 128KB UNROM games


As well as 256KB UOROM games!

I'd like to thank many of you from the NESDEV forums, for explaining me about the mirroring switch, tips on rewiring and all that. Also, big thanks to No Carrier, who helped me obtain the fantastic desoldering iron, that made the task of removing the chips MUCH easier!

I'm now on the process of designing a game to run on this board, and I just hope I'll finish this one! =D

[Memblers]

Congrats, very clean looking job.

Remember if you finish a UOROM game, I've got the new boards to support it.

[commodorejohn]

Heh, I like the Portuguese newspaper it's sitting on =)

[tokumaru]

Congrats, very clean looking job.

Thanks. It's still not as clean as I expected it to be! I'm just happy that it works! I feel much more confident to make other carts now (since I'm sure of the kind of rewiring that works). My next attempt will probably be a TKROM. I really like that board!

Remember if you finish a UOROM game, I've got the new boards to support it.

That'd be great! =)

Heh, I like the Portuguese newspaper it's sitting on =)

Yeah... strangely enough, newspapers here in Brazil tend to be written in portuguese! =D

[hayabusafmw]

thanks for the pics ill study them

[proveaux]

Let me see if i got it right.
UNROM to UOROM on Konami board
Bend up eprom pins 1, 2, 24, 30, 31, and 32.
Bend up MC74HC32 pin 3.
Solder pin 1 to hole 14.
Solder pin 2 to hole 22.
Solder pin 30 to MC74HC32 pin 3.
Solder pin 32 to hole 28.
Edit...
Works as far as i can tell. Thanks.

[bytestorm]

Let me see if i got it right.
UNROM to UOROM on Konami board
Bend up eprom pins 1, 2, 24, 30, 31, and 32.
Bend up MC74HC32 pin 3.
Solder pin 1 to hole 14.
Solder pin 2 to hole 22.
Solder pin 30 to MC74HC32 pin 3.
Solder pin 32 to hole 28.
Edit...
Works as far as i can tell. Thanks.

isnt pin 30 NC? :/

[tokumaru]

Sorry for not replying, but this was a long time ago and I don't have my notes from back then, or the time to analyze the board and make new notes...