street fighter II upgrade roms needed!

if you have bad roms and need them replaced, probably hobbyroms is best shot.

now if you have a SFII WW and are trying to go to SFIICE or SCIIHF, I don't think its possible. If it is, I could use 2 sets!

Going from SFII CE to SFII HF is roms and a security chip. Don't think you can get around that. Not sure what it takes to go from SFII CE to rainbow or red wave. I think its more than just roms. Probably a secutiry chip too. Don't know if that security has been cracked.
 
Going from SFIIWW is more a lot than 3 chips and a layout pattern of the chips. Layout of the "B" board seems a bit differnet, but not really sure if you can or can't convert a WW to CE or HF. I've not really heard about people converting them. (can you?) I've heard of people converting Final Fights or WW to Ghouls & Ghosts.

If you are upgrading a CE to a HF, it's only 3 chips. Roms 21,22,& 23 I believe.

CPS1 SFWW PCB layout.
640px-Cps1_street_fighter_ii_the_world_warrior_set1_bb_top.jpg


CPS1 SF CE/HF PCB layout.
640px-Cps1_street_fighter_ii_champion_edition_set1_bb_top.jpg
 
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I would not argue what it takes to upgrade a SFII CE. But I have noticed that one of the chips between 18 and 26 or maybe its 19 and 27 are somtimes changed. I am not sure why. Maybe it has to do with the red wave or rainbow upgrades. MAybe something to do with accelerator.

Going from SFIIWW is more a lot than 3 chips and a layout pattern of the chips. Layout of the "B" board seems a bit differnet, but not really sure if you can or can't convert a WW to CE or HF. I've not really heard about people converting them. (can you?) I've heard of people converting Final Fights or WW to Ghouls & Ghosts.

If you are upgrading a CE to a HF, it's only 3 chips. Roms 21,22,& 23 I believe.

CPS1 SFWW PCB layout.
640px-Cps1_street_fighter_ii_the_world_warrior_set1_bb_top.jpg


CPS1 SF CE/HF PCB layout.
640px-Cps1_street_fighter_ii_champion_edition_set1_bb_top.jpg
 
I would not argue what it takes to upgrade a SFII CE. But I have noticed that one of the chips between 18 and 26 or maybe its 19 and 27 are somtimes changed. I am not sure why. Maybe it has to do with the red wave or rainbow upgrades. MAybe something to do with accelerator.

Maybe there was different methods for the same results. Because I've also heard of that way. There was a youtube video somewhere (can't find it now) that had shown a guy take off the "C" board and replace 3 eproms (21-22-23) and place back the "C" board. But then again like you said, I've seen auctions and some people with more eproms.
 
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