#SNES9X BAD SUM CHECKSUM CODE#

Sometimes as in three times compared to the hundreds of tests I have done. The CPU also generates the music in the NES.

#SNES9X BAD SUM CHECKSUM CODE#

The PPU doesn't care if it's receiving graphics or not, but the CPU must get usable code or it can't work. In a system like this, it's always possible to have a bootable game with graphical glitches. This is unlike the NES which has two ROM buses in the cartridge slot, one for the CPU and one for the PPU.

A broken trace or a failing Mask ROM usually renders the game unbootable. The SNES cartridge slot is what some would call 'OneBus', everything in the SNES has to share and take turns with the cartridge slot. I don't think the problem lies in the edge connector/trace area. Sometimes the game displays the anti-piracy screen. He said the game boots to a black screen and the intro music plays. I have only seen problems with sram for games that don't use it. Yeah it is less likely the extra sram will cause problems. You said above one of them leads to nothing, if that leads to something on DKC1 you pretty much found your problem. I think your best option here is to open a DKC 1 cart up and do pin traces on every single pin to determine if 3 has a broken trace and be aware they could lead to more than 1 spot especially check the sram.

Snes9x bad sum checksum