[Tech] Frogger long shot!

[John Bennett]

[ukvac] [Tech] Frogger long shot!
Okay, long shot this, BUT...

I have a GENUINE (stress that) Konami frogger PCB here (BOTH layers
are screened with Konami). I had two, the other was a Sega/Gremlin.
I can't remember which one (or both) came from Holland, but just in
case, does anyone remember modifying a Konami board to Sega roms in
the (probably distant) past???

(Told you it was a long shot).

The problem is that i need it converted back and whowever converted
it only used three program roms instead of two. All the other
hardware _LOOKS_ identical, and all other roms ident as genuine Sega.

There is also no version in mame (bootleg, Sega, Konami or
otherwise) that i could see that uses only three program roms.

I'm seriously puzzled so any help appreciated...

Oh, the whole point is that it is sold including a high score save
kit (ala JRok) and i forgot to check this would actually work first -
i just made assumptions. BUT after 4 hours of farting about the
score save DEFINATELY won't work, and i'm back to square one. A
working Konami PCB displaying Sega copyright (

Cheers,
Martin.
PS: Don't even think about making any derogative comments towards
screwing over the seller as it's a fellow VACer who still actively
reads the list... (just thought i'd save ANY embarrassment!)



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[pobtastic]

RE: [ukvac] [Tech] Frogger long shot!
If he can wait I'll bring me hacked one up on Saturday fella and we can have
a play with it then. Works perfectly with the HSS hack... We can then see
what's different between the boards, am sure we'll work it out... ;o)

Pobster

 

[John Bennett]

[ukvac] Re: [Tech] Frogger long shot!
> There is also no version in mame (bootleg, Sega, Konami or
> otherwise) that i could see that uses only three program roms.

According to the MAME source code both the Konami and Sega
versions use 3 program ROMs: ???

ROM_START( frogger )
ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */
ROM_LOAD( "frogger.26", 0x0000, 0x1000, 0x597696d6 )
ROM_LOAD( "frogger.27", 0x1000, 0x1000, 0xb6e6fcc3 )
ROM_LOAD( "frsm3.7", 0x2000, 0x1000, 0xaca22ae0 )
...

ROM_START( frogseg1 )
ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */
ROM_LOAD( "frogger.26", 0x0000, 0x1000, 0x597696d6 )
ROM_LOAD( "frogger.27", 0x1000, 0x1000, 0xb6e6fcc3 )
ROM_LOAD( "frogger.34", 0x2000, 0x1000, 0xed866bab )
...

Gary.



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[John Bennett]

[ukvac] Re: [Tech] Frogger long shot!
Okay, so it was pushing on for 3am!!!

Sega Set 2 uses four:
ROM_START( frogseg2 )

ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */

ROM_LOAD( "frogger.ic5", 0x0000, 0x1000, 0xefab0c79 )

ROM_LOAD( "frogger.ic6", 0x1000, 0x1000, 0xaeca9c13 )

ROM_LOAD( "frogger.ic7", 0x2000, 0x1000, 0xdd251066 )

ROM_LOAD( "frogger.ic8", 0x3000, 0x1000, 0xbf293a02 )

Which is obviously the version Jrok implemented his high score kit on
(presumably to give the space for the extra code?) And it would seem
from experimentations last night that the four rom version and the
three rom version are NOT interchangeable...

The sound and object roms are interchangeable (according to romident -
which i guess could be wrong) so i'm still stuck and confused!

Never mind...

> According to the MAME source code both the Konami and Sega
> versions use 3 program ROMs: ???
>
>
> ROM_START( frogger )
> ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */
> ROM_LOAD( "frogger.26", 0x0000, 0x1000, 0x597696d6 )
> ROM_LOAD( "frogger.27", 0x1000, 0x1000, 0xb6e6fcc3 )
> ROM_LOAD( "frsm3.7", 0x2000, 0x1000, 0xaca22ae0 )
> ...
>
> ROM_START( frogseg1 )
> ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */
> ROM_LOAD( "frogger.26", 0x0000, 0x1000, 0x597696d6 )
> ROM_LOAD( "frogger.27", 0x1000, 0x1000, 0xb6e6fcc3 )
> ROM_LOAD( "frogger.34", 0x2000, 0x1000, 0xed866bab )
> ...
>
>
> Gary.



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[John Bennett]

[ukvac] Re: [Tech] Frogger long shot!
Maybe you could stick a larger 2764 in the third socket,
bend out a few pins and wire the overhanging A12 pin to
the correct place on the baord. Or piggyback another 2732
on top of the third ROM, bend out a few pins and wire up?

Gary.





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