What's new

stj

Grand Master
Joined
May 4, 2017
Messages
1,624
Reaction score
799
Location
England
o.k.,
before i start soldering flyleads in this bitch to run to my scope,
i'll ask incase it's been seen before.

it runs fine for over an hour and then freezes.
it's 100% themal because the longer it's left off after, the longer it runs again.


it's a perfect freeze - 100% stable video.
so the PPU is running fine along with the vram.
i'm looking at the schem and can only think it could be the master 2Mhz clock going down or the CIC pulling and holding the reset pin.
that or the cpu itself - hoping it's not the cpu!!
 

Attachments

  • NES-001-Schematic---CPU,-PPU,-RAM,-CIC.png
    NES-001-Schematic---CPU,-PPU,-RAM,-CIC.png
    163.5 KB · Views: 8
Top