Hey there,
Some few months ago I bought myself two Famiclones (Nintendo on a Chip ones), and I sacrificed one to do a nasty experimentation - rip out the guts of the console, and tear out the cartridge connector by desoldering it.
Looking at the common cart pinouts for the 60-pin ones, I saw all the pins from the address pins and the data pins seperately laid out (I guessed).
So I think it may be a fun idea to connect the CPU's D0-D7, and A0-A14 to a ROM and try to access the APU first. (Other pins like Chip enable are involved too)
I've used an SRAM pretending to be a ROM and I used a microcontroller to load up the code into the SRAM, and then let the gutted NOAC run it.
You think it's possible? It may sound really strange and it may or may not work.
Some few months ago I bought myself two Famiclones (Nintendo on a Chip ones), and I sacrificed one to do a nasty experimentation - rip out the guts of the console, and tear out the cartridge connector by desoldering it.
Looking at the common cart pinouts for the 60-pin ones, I saw all the pins from the address pins and the data pins seperately laid out (I guessed).
So I think it may be a fun idea to connect the CPU's D0-D7, and A0-A14 to a ROM and try to access the APU first. (Other pins like Chip enable are involved too)
I've used an SRAM pretending to be a ROM and I used a microcontroller to load up the code into the SRAM, and then let the gutted NOAC run it.
You think it's possible? It may sound really strange and it may or may not work.