Got this picture some days ago - this is, yes, changing the world forever - maybe the first time that somebody has opened a multitap and took photos of the PCB. Big thanks to Francois!
The above photos are showing the Hudson Super Multitap 2 (ie. the square "Bomberman" version).
It is using only a single-channel switch and only a single chip (IC1: HuC6205B, which must some sort of programmable PAL, or a custom chip specifically for the multitap) (NB. Hudson was also using custom "HuC" chips in some 8bit game cartridges).
Interestingly this is different than the "(in-)official" schematic (as far as I know, Nintendo did release such a schematic, with 3 chips and a huge 4-channel switch in book2.pdf, ie. the second book that we won't talk about here). Anyways, it seems that this (in-)official circuit was only some sort of example/prototype, not being used in the actual retail versions (unless Hudson's older long/slim Super Multitaps were using it, or some of the other HORI/BPS or unlicensed ones did do so).
If somebody could upload PCB pictures for other SNES Multitaps would be very interesting!
Oh, if somebody wants to get rid of a Tribal Tap and would like to donate it for research: I'd really love to get one! It appears to be a non-functional fake 6-player adaptor that works only with max 5 players, which is so weird that I'd like to examine that PCB myself.
Attachment:
The above photos are showing the Hudson Super Multitap 2 (ie. the square "Bomberman" version).
It is using only a single-channel switch and only a single chip (IC1: HuC6205B, which must some sort of programmable PAL, or a custom chip specifically for the multitap) (NB. Hudson was also using custom "HuC" chips in some 8bit game cartridges).
Interestingly this is different than the "(in-)official" schematic (as far as I know, Nintendo did release such a schematic, with 3 chips and a huge 4-channel switch in book2.pdf, ie. the second book that we won't talk about here). Anyways, it seems that this (in-)official circuit was only some sort of example/prototype, not being used in the actual retail versions (unless Hudson's older long/slim Super Multitaps were using it, or some of the other HORI/BPS or unlicensed ones did do so).
If somebody could upload PCB pictures for other SNES Multitaps would be very interesting!
Oh, if somebody wants to get rid of a Tribal Tap and would like to donate it for research: I'd really love to get one! It appears to be a non-functional fake 6-player adaptor that works only with max 5 players, which is so weird that I'd like to examine that PCB myself.