I learned about the Jaleco Mega System 1 when I first started picking up Jaleco Mega System 32 games it's got a pretty varied catalog with some great shmups and platformer/rpgs.
it looks as though you can swap out the ROM board similar to System 16 or System GX. Looking at MAME source there seems to be a few rom board variations duplicate protection keys across games, which to me says that straight conversions without patching might be possible for some games.
I recently picked up a P-47 board set for a reasonable price (great game too!) and would love to try out some conversions for some of the more difficult to find titles.
Some photos for reference:
P-47 Main board plus ROM board (system "A" no protection):
pro yakuu ROM board (system "A" encryption key "2"):
rod land ROM board (system "A" encryption key "2"):
plus alpha ROM board (system "A" encryption key "2"):
'
Has anyone attempted or seen a conversion on this system? I'm currently searching for a donor ROM board to experiment with but I'm curious if anyone else has tried this or if there are any gotchas?
it looks as though you can swap out the ROM board similar to System 16 or System GX. Looking at MAME source there seems to be a few rom board variations duplicate protection keys across games, which to me says that straight conversions without patching might be possible for some games.
Code:
Year + Game System Protection
---------------------------------------------------------------------
88 Legend of Makai (World) / Z
Makai Densetsu (Japan) Z
P-47 (World) / A
P-47 (Japan) / A
P-47 (Japan, Export) A
Kick Off (Japan) A
Takeda Shingen (Japan) A Encryption (key 1)
Ninja Kazan (World) / A Yes + Encryption (key 1)
Iga Ninjyutsuden (Japan) A Yes + Encryption (key 1)
89 Astyanax (World) / A Yes + Encryption (key 2)
The Lord of King (Japan) A Yes + Encryption (key 2)
Hachoo! A Yes + Encryption (key 2)
Jitsuryoku!! Pro Yakyuu (Japan) A Yes + Encryption (key 2)
Plus Alpha A Yes + Encryption (key 2)
Saint Dragon A Yes + Encryption (key 1)
90 RodLand (World, set 1) / A Encryption (key 3)
RodLand (World, set 2) A Encryption (key 2)
RodLand (Japan) A Encryption (key 2)
R&T (Prototype?) A Encryption (key 2)
Phantasm (Japan) / A Encryption (key 1)
91 Avenging Spirit (World) B Inputs
Earth Defense Force (Prototype) A Encryption (key 1)
Earth Defense Force B Inputs
64th Street (World) / C Inputs
64th Street (Japan) C Inputs
92 Soldam (Japan) A Encryption (key 2)
Big Striker C Inputs
93 Chimera Beast C Inputs
Cybattler C Inputs
Hayaoshi Quiz Ouza Ketteisen B Inputs
Peek-a-Boo! D Inputs
Some photos for reference:
P-47 Main board plus ROM board (system "A" no protection):
pro yakuu ROM board (system "A" encryption key "2"):
rod land ROM board (system "A" encryption key "2"):
plus alpha ROM board (system "A" encryption key "2"):
'
Has anyone attempted or seen a conversion on this system? I'm currently searching for a donor ROM board to experiment with but I'm curious if anyone else has tried this or if there are any gotchas?