I would look at mame source between gals panic su and gals panic s2
Checking my 2 versions of galpanis, I can confirm (in blue) some of the mappings deducted by @twistedsymphony (thanks)This is the best mapping I could come up with based on the mame driver:
ROM-3-BOARD <-> ROM-2-BOARD
prg
u6 <-> u10
u4 <-> u8
spritegen
u21 <-> u24
u20 <-> u20
u8 <-> u17
u32 <-> u32 (there is no u32 in ROM-3-BOARD and u32 is a 74LS374 in ROM-2-BOARD)
gfx2
u17 <-> u16
u9 <-> u13
gfx3
u3 <-> u7 (not populated in galpanis neither in ROM-3-BOARD and ROM-2-BOARD)
¿¿ u5 ?? <-> u18 (not populated in galpanis in ROM-2-BOARD) (Cyvern uses this position: U1
ymz
u1 <-> u4
plds
?? <-> u9 (There is no pals in ROM-3-BOARD, seems they are integrated in big SMD at U2)
?? <-> u11 (There is no pals in ROM-3-BOARD, seems they are integrated in big SMD at U2)
if there is a typo it's in MAME... this was based on the MAME driver for Gals Panic 2 which shows ROM gs210300 in position u32OK, maybe you have a typo in:
u32 <-> u32
and, should it be?:
u32 <-> u22
There is no U32 in ROM-2-BOARD
I can confirm your guesses about Cyvern. I managed to make a conversion using a ROM-3-BOARD, following your mapping table.I went through my carts and I do indeed have all 4 ROM board variants in my collection.
this is the mapping between the 4 cart variants as best as I can figure
* = educated guess based on position on the ROM board and MAME info.
N/A = not available
Thanks for confirming!I can confirm your guesses about Cyvern. I managed to make a conversion using a ROM-3-BOARD, following your mapping table.
Same thing happened with me on two occasions. Not super bummed as I personally think the game is trash but I was converting it for someone else.Just got a few carts to make a Cyvern and Sengeki Striker, the Puzz Loop I received is a Rom 2 board .
Am I out of luck making a Sengeki out a Rom 2 board, it needs 4 sprite roms and there is only 3 on a Rom 2 board.
Anyway I made these in preparation.
yeah, so Sengeki need any board type other than ROM2, but I believe you can use ROM2 for CyvernJust got a few carts to make a Cyvern and Sengeki Striker, the Puzz Loop I received is a Rom 2 board .
Am I out of luck making a Sengeki out a Rom 2 board, it needs 4 sprite roms and there is only 3 on a Rom 2 board.
MX29L3211 are EEPROMs that could be burned many times by setting pin 1 to "low". We need to put it to "high" by ourselves in order to set them to "read only mode".Im just starting on my Cyvern conversion, why are we feeding 3.3v to pin 1 Write enable on the 29L3211?
Its not connected to anything on the pcb, I thought it was only used when programming?
Pardon my ignorance.
welcome!Thanks for that, I got it working.