Early NES Motherboard and CPU info 1985

[Great Hierophant]

I always saw gray on my front loaders and white on my Famicom AV.

[Great Hierophant]

I received a Famicom with a 2A03E and a 2C02E, and Micro Machine displays jumpiness in the the menu screens and the blue line halfway across the screen on the Title Screen. The plot thickens as to this game.

[thefox]

I received a Famicom with a 2A03E and a 2C02E, and Micro Machine displays jumpiness in the the menu screens and the blue line halfway across the screen on the Title Screen. The plot thickens as to this game.

It's not news -- the game relies on OAM readback to synchronize to PPU, which is not implemented on older PPU revisions.

[lidnariq]

Yeah, but I thought (we thought) readback had been implemented in the 2C02E...

[thefox]

Yeah, but I thought (we thought) readback had been implemented in the 2C02E...

My bad, then. I can't keep up with the revisions.

[Polar Hacker]

Can someone try this for me? I saw it when I was taking apart my NES yesterday. My board revision is 4. If you open the door on the toaster NES, there is a upside down number (just rotate your head to read it). Thing is, that number is also 4. Is this a coincidence, or can this tell you the board revision?

[lidnariq]

Coincidence. I have two NES-CPU-07s. One has a 13 on the door (S/N N11224416), and the other has a 5 (S/N N19551709).

I'd guess that's the mold #, since any given injection mold is only good for around a million total uses before it needs to be replaced, and Nintendo made a lot more than 1M NESes.

[Great Hierophant]

I guess those emulators which did not show Micro Machines correctly were not necessarily inaccurate in that respect.

[Polar Hacker]

Coincidence. I have two NES-CPU-07s. One has a 13 on the door (S/N N11224416), and the other has a 5 (S/N N19551709).

I'd guess that's the mold #, since any given injection mold is only good for around a million total uses before it needs to be replaced, and Nintendo made a lot more than 1M NESes.

Shame...

[Salduchi]

I know this is an old post, and I’m sorry to bump this back up to the top….I have had 01 and 02 boards and notice that they both display colors that aren’t correct. Blue looks green and red looks pink. Anyone else notice this or have any information on why this is?