hi I know i should have made only one post not two but this has just come to my mind "Is it possible to mod the nes so that you can save your gamestands(is this a word???)
THX
Kai
I remember one for the Super Nintendo that let you save your game on a floppy disk.. All you had to do was have that disk in the device and the game was plugged into that device and then into the SNES.. I couldn't tell you for the life of me what it was called, because that was when I was ~ 10-12 and before I could afford the interest in gaming I have today
peppers wrote:I belive makeing a nes save stave devise would involve bulding something that could dump its memory then restore it
You'd lose the state of what the CPU was doing, most of the system state components like VRAM can't be read out easily, among many other issues .. if you restore from a state with the RAM and VRAM and so on, you still lose the operation the chips were performing.
Most reports of use of state-saving devices showed exactly this-- sound processors crashed, the video was entirely corrupt or-- most common-- the machine locked hard from missing an instruction. Whoops.
vb_master wrote:What if you also save stated the processor, or turned the processor off while the NES was on?
Killing the CPU while on would just crash the game, you can't just skip operations. And aside from opening the 2A03 and actually tapping the core's leads with microscopic-level equipment to read out the state, all you an do from the outside is SEND the CPU an instruction or RECIEVE its result. Not its state of calculation.
What if you made a patch which made the CPU have all NOP's during a pause, then had the save tell the CPU to go into the Pause state, so you have to press Start every time you restore a gamesave.
I suppose that COULD work but you'd have to patch every single game and reburn it out onto EPROM or FLASH, very troublesome and very expensive. Have fun reverse engineering every game you own.
