nesdev.org

Here is a test file. This covers all but 433 of the first 2 bytes of compressed data, of all 3 types. (433 of them do not have a pointer, and as such, I used 0xFFFFF8 as the pointer, (will point to rom location 0xFDFBF7, decompression type 2, should decompress as all 0, according to your previous te...

Wasn't me that had the logic analyzer. Still don't have one.

The 2 systems which I have pulled metal box APUs from, are 1/1/1, and if it is PPU1/PPU2/CPU, then 1/1/2.

What exactly are you referring to, by 1/1/1 and 1/2/2 snes systems. Is there an easy way to tell these systems apart from the 1/3/2 and later systems, without opening them, that you are aware of? (I now have PCBs for the purpose of parallel port APU hookup, and this kind of info would help here.)

Starting on the PCB design. seems nintendo could not stick with even 100mil pin spacing on the snes cart connector. Its 98 mil between pins horizontally, and 180 mils row spacing. The group of 4 pins off the main ones, are 275 mils away.

I do have a suggestion for improving connection reliability. Get some DeoxIT . This stuff really does improve connections. back when I first got both the 3.8 and 4.5 mm game bit, I was also given a sample of the stuff. You know the issues that nes systems seem to have where you have to blow on the c...

I happen to own not only an FEoEZ cart, but I also own an MDH cart and a SPL4 cart. (the other 2 SPC7110 games). All 3 of those could be good, for extracting test data (first 2 byte combos) from their data rom. As for that 8Mhz clock being sufficient, it was, due to the fact, that when you were doin...

The primary thing here, is that the game is expecting direct communication with the spc. If there is no clock going to the spc, then communication can not happen. You basically have to pass Pin 1 of the cartridge connector from the bottom side, directly to the top side somehow, as that is the clock ...

Don't even have a copier that I could run the tests on, so Kammendo will have to do the runs for us. As for whether the toggling is required for compression, I can't remember if it was or not. Needs to be tested for sure. It is quite possible that it may be required. Regardless, it only has to be do...

Unfortunately, I will have to rebuild my cart dumper. The only thing I have left of it, is the AT90S8535, and the ZIF socket it is in. Would have to pretty much rebuild it from scratch at this point. If I do that, it won't be with Wirewrap wire. I will more than likely have a PCB made for the purpos...

True that the pointer may be expected, but what if you could store some arbitrary value in bank $50:0000, say the table that is expected, and point it there, to decompress just entry 0 of that table. If the spc could do that, then you could use nearly every 2 byte combination of the existing U2 rom....

Any progress on this FPGA SPC-700 project at all?

Here is a complete set of the extracted compressed, and decompressed data, from the original games. http://caitsith2.net/spc7110/ The method to extract the compressed data, and nothing more than what is required for the specific decompressed entry, took advantage of the tables themselves. Each Table...

Official diagnosis.