nes-cpu-01 mainboard
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nes-cpu-01 mainboard
Any info on a 1985 nintendo nes-cpu-01 mainboard? Is it early or rare? Was found in a smooth top case with a N0056746 serial number.
Re: nes-cpu-01 mainboard
Redherring recently managed to borrow and reverse-engineer the differences in the rev 1 and 2 NES mainboards. In his github: https://github.com/Redherring32/OpenTen ... -01_02.pdf
As far as scarcity: the first, and quite rare. As far as that being interesting? Not at all.
As far as scarcity: the first, and quite rare. As far as that being interesting? Not at all.
Re: nes-cpu-01 mainboard
Thank you from that information. Guess I need to keep this for the start of my collection. Just got to get it working properly. The color is off. I mostly noticed red is pink. It looks like someone may have already worked on it. Is has a pair of ceramic disk capacitors soldered on the av out jacks. That seemed weird to me. Also has two green jumper wires on the bottom of the board.
Re: nes-cpu-01 mainboard
Those green jumpers are stock, correcting for a design flaw.
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Re: nes-cpu-01 mainboard
That's a nice find man. By the way, what's the color of the screen of your NES-CPU-01 when you turn it on with no game when it blinks?
For example my NES-CPU-02 blinks a gray screen when it's turned on with no game. I had a NES-CPU-01 board that flashed a blue screen with no game at one point back in March 2021 which i found in serial N0092700 from a NES in really bad shape before the RF box died of smoke due to old age and replaced my motherboard with a perfectly good NES-CPU-02 from a donor system.
For example my NES-CPU-02 blinks a gray screen when it's turned on with no game. I had a NES-CPU-01 board that flashed a blue screen with no game at one point back in March 2021 which i found in serial N0092700 from a NES in really bad shape before the RF box died of smoke due to old age and replaced my motherboard with a perfectly good NES-CPU-02 from a donor system.
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- Posts: 8
- Joined: Mon Aug 13, 2018 5:52 pm
Re: nes-cpu-01 mainboard
Those two green jumper wires by the way are actually normal for a NES-CPU-01/02 board. And for the colors being off, you're not the only one with this issue. My NES-CPU-02 is like that as well. For example, In Mike Tyson's Punch Out on a CPU-01-02, the green ring where you fight Mike Tyson is like a darker green rather than a lighter green like on later systems. And Mike Tysons glove on the CPU-01-02 looks more like a maroon color than a normal red color. On SMB1, the bricks in the underground levels look more like a greenish color than a teal color.
Re: nes-cpu-01 mainboard
The very early NES mainboards have a 2C02E PPU, instead of the 2C02G PPU most others do. These behave differently in a bunch of ways, although we haven't written all the differences up yet.