My Overclocked NES!

[133MHz]

Hi! I was a little busy lately with another projects and stuff, like remodelling my room (made a poor man's reprogrammable NES cartridge also). Took lots of pictures, so it's just a matter of writing. Stay tuned!

[satoshi_matrix]

Hey 133MHz, do you think it possible to overclock an AV Famicom? I'm thinking of buying another one, and would defenetley get you to do it if at all possible. Do you think it would be sagnificently different/more difficult than the big boxy NES?

[133MHz]

Totally possible. Only the NOAC based Famiclones are not overclockable (since CPU & PPU share the same die)

[satoshi_matrix]

Alright, so the AV Famicom came in the mail today! It'll cost me $28 bucks to ship it by air in a little over two weeks. I'd do it as soon as I get paid. Thanks again 133MHz, I can't wait for your tutorial.

[133MHz]

Wow, you got a pretty good shipping deal! money and time-wise

[satoshi_matrix]

Hey just out of curiosity, has the av famicom I sent you arrived yet? If not it should be within the next few days.

[133MHz]

Nope, it hasn't arrived yet.

[satoshi_matrix]

 
The overclocked AV Famicom arrived! It works great! 200% satisfied! Now you gotta get around to writing a walkthrough 

[NES]

hey 133MHzz wheres the clock pin on the nes processor what number is it and on what side is it on (left or right) 

[133MHz]

Pin 29 is the Clock Input pin. Use the notch on the chip to guide yourself.

Code Select Expand



               _____   _____
              |     \_/     |
       SND1 - | 01       40 | - +5V (Vcc)
       SND2 - | 02       39 | - STROBE (joypad)
       /RST - | 03       38 | - EXT 44
         A0 - | 04       37 | - EXT 45
         A1 - | 05       36 | - /OE (joypad 0)
         A2 - | 06       35 | - /OE (joypad 1)
         A3 - | 07       34 | - R/W
         A4 - | 08       33 | - /NMI
         A5 - | 09       32 | - /IRQ
         A6 - | 10       31 | - M2
         A7 - | 11       30 | - GND*
         A8 - | 12       29 | - CLK
         A9 - | 13       28 | - D0
        A10 - | 14       27 | - D1
        A11 - | 15       26 | - D2
        A12 - | 16       25 | - D3
        A13 - | 17       24 | - D4
        A14 - | 18       23 | - D5
        A15 - | 19       22 | - D6
        GND - | 20       21 | - D7
              |_____________|



[NES]

hey how can i power the clock generator? can i do it  with the voltage on the processor

[133MHz]

Yes, you can use the +5V and GND pins from the processor to power the clock generator, or in fact, any place where you could find them (like the voltage regulator, controller ports, or other chips).

What oscillator frequency will you use? And where did you get (or plan to get) your clock generator?

[NES]

its at 46.something Mhz and i think its out of a video card

[133MHz]

That would yield a CPU frequency of ~3.8 MHz which is quite a lot but some consoles can take it. Good luck!
As when overclocking PCs, some CPUs can run higher than others and the only way to know is through experimentation .

[NES]

can the nes take it