nesdev.org

No prob... I hope this helps, and if not, I'm glad you guys at least find it interesting.

DogP

I would love to build out an NSS rig, but the real problem are the games. It's only possible to find the three stock titles in any kind of frequency. The other 10 show up maybe one time every two years each on eBay, usually in untested condition, and for $200+ a piece. I've never once seen the rare...

Hey, Over the last few months I repaired a bunch of Nintendo Super System (arcade, similar to Playchoice 10, but SNES based) motherboards... I finally had some time this weekend to go through my notes and make a page with my repair logs, as well as a bunch of pictures of what various failures looked...

Would a Super Famicom board fit in a SNES shell? I'm pretty sure the motherboards are the same between the two (though there are several versions of the board)... though yeah, the power connector is different, and maybe RF as well (never tried). > I saw that Super Famicoms are actually cheaper to i...

Yeesh. I'm surprised games would run so (sorta) well on a bad CPU The CPU is so integrated that it seems certain parts fail, causing weirdness, but still running. For example, one CPU had a bad DMA controller, which would play a lot of games fine, but for example F-Zero played weird. Another had a ...

Unfortunately, I'd suspect a bad CPU. :( I recently repaired a bunch of Nintendo Super System arcade motherboards (basically an SNES, with 3 slots and an extra processor to handle coin operation)... and some seemed completely dead, some would play some games and not others, and some had goofy glitch...

Lately I've been repairing a bunch of Nintendo Super System PCBs (basically an arcade SNES), and have come across a LOT of "Black Screen" problems. Unfortunately, the majority of them have been bad CPUs. :( To get CPUs to fix them, I have to pull them from SNES systems (I try to take from ...

BTW... in case you're still interested, I've got the prototypes working to my satisfaction, and I'm taking pre-orders: http://www.projectvb.com/nss/ .

DogP

Just a misc update... I shortened the cables to my SNES cart adapter by about 4", and it's much better... but still not 100%. Using my original Mario Kart cartridge, there's only a few lines across the screen. On my flash cart, the screen looks perfect, but the game still glitches when you driv...

Then 3 register dump screens would be interesting, so see initial values, and mirrors, and what is stored in unused bits and so on. For the CURRent port values, bit6 of the first byte should be "blinking" - don't know if there are more such bits showing activity? The only activity was on ...

The TEST SLOTS test was mainly for seeing PROM Data/CounterOut and Title as hexdumps (on the three screens accordingly). That's no longer needed, too. But the Titles in clean-text (not the hex values) would be interesting, to see which slot maps there. If you plug in three cartridges, their titles ...

The OSD OFFSET tests might be still interesting (as how I do understand the datasheet, the hori/verti offsets should move the screen in 4pixel/4scanline units, but not absolutely sure if did understood that correct). And the 4th: DSCF3867.JPG SELFTEST is measuring some timings, probably 60Hz vsync ...

nocash wrote:The OSD OFFSET tests might be still interesting (as how I do understand the datasheet, the hori/verti offsets should move the screen in 4pixel/4scanline units, but not absolutely sure if did understood that correct).

Here are the first 3: DogP

nocash wrote:Here's an updated version of the test program - http://nocash.emubase.de/nss-test.zip

Success! Were there any specific tests that you wanted run on hardware?
DogP

One possible problem might be that the program is accessing the OSD chip too soon after reset. The datasheet is mentioning 'something' about 1ms on last page (not quite clear what that means, and how it fits to reset signals that might be generated by the NSS mainboard). Anyways, the OSD chip is re...