chacal231077
Grand Master
Hi ! 
I would like My Fighter Impact ZN to Fighter Impact A .
what are the roms changed ?
Thank you
I would like My Fighter Impact ZN to Fighter Impact A .
what are the roms changed ?
Thank you
Fighter Impact convert to ver.A
- Thread starter chacal231077
- Start date
Here's how I look to see if a game can be switched to another region or revision. I load up the mame driver (zn.cpp in this case) and find the two games in question:
fighers impact: https://github.com/mamedev/mame/blo...e53b1d6d1aef308/src/mame/drivers/zn.cpp#L4314
fighters impact a: https://github.com/mamedev/mame/blo...e53b1d6d1aef308/src/mame/drivers/zn.cpp#L4293
Most of the time I'd just look for the program roms, but sometimes they're not commented in the code. So, looking at the checksums for the chips, you'll find the two games are identical except for two chips. Can you see those? ".3" and ".4".
The one issue I'd be careful about is that one set is 0x080000 (4M/512k) and the other is 0x100000 (8M/1024k) so unless the larger chip data is actually half empty, which I doubt, you'll need different chips than the original (27c080/27c801).
Both games load on the G-Net Modbios 2011 too
fighers impact: https://github.com/mamedev/mame/blo...e53b1d6d1aef308/src/mame/drivers/zn.cpp#L4314
fighters impact a: https://github.com/mamedev/mame/blo...e53b1d6d1aef308/src/mame/drivers/zn.cpp#L4293
Most of the time I'd just look for the program roms, but sometimes they're not commented in the code. So, looking at the checksums for the chips, you'll find the two games are identical except for two chips. Can you see those? ".3" and ".4".
The one issue I'd be careful about is that one set is 0x080000 (4M/512k) and the other is 0x100000 (8M/1024k) so unless the larger chip data is actually half empty, which I doubt, you'll need different chips than the original (27c080/27c801).
Both games load on the G-Net Modbios 2011 too
Last edited:
chacal231077
Grand Master
Thank you ekorz 
chacal231077
Grand Master
Hi!
I programmed the 2 eprom E25-13 and E25-14 as on the pcb version A in the photo, I had a bios blue screen error code.I programmed the E25-10 and always this blue screen bios error ect ...do you have an idea?thank you
I programmed the 2 eprom E25-13 and E25-14 as on the pcb version A in the photo, I had a bios blue screen error code.I programmed the E25-10 and always this blue screen bios error ect ...do you have an idea?thank you
27c080
27c040
Maybe there’s a jumper that enables the extra address line. I don’t have either game and without high quality photos it’s hard to see. Where does Pin 1 go on your board?
27c040
Maybe there’s a jumper that enables the extra address line. I don’t have either game and without high quality photos it’s hard to see. Where does Pin 1 go on your board?
This is a GDarius pcb that uses the same (or similar) rom board and 27c080/27c801. There’s a JP7 near those chips, that could be it.
chacal231077
Grand Master
Hi!
There is not P7 near those chips
I programmed the 3 chips.F25-10 with 27C4001-10FF25-13 & F25-14 with 27C080-12F.
But originally F25-13 & F25-14 uses 27C801.Does it change Something
Thanks for your help
My Fighter impact PCB
Fighter Impact A PCB
There is not P7 near those chips
I programmed the 3 chips.F25-10 with 27C4001-10FF25-13 & F25-14 with 27C080-12F.
But originally F25-13 & F25-14 uses 27C801.Does it change Something
Thanks for your help
My Fighter impact PCB
Fighter Impact A PCB
I didn't quite understand that.
e25-10.14 is common between boards, 27c040 / 27c4001, you don't need to change it
e25-13.4 requires 27c801 / 27c080
e25-14.5 requires 27c801 / 27c080
The rom boards really look identical so I think it would just work with those 2 roms swapped, ic4 and ic5
It still works when you put back in the other ic4/ic5?
trace out the A19 pin, if it goes to the Jumper or get driven to GND or to +5V or somewhere else it will give you clues as to how to proceed.
chacal231077
Grand Master
Hi!
I reprogrammed correctly.here is what is happening
I reprogrammed correctly.here is what is happening
Trace pin1 (A19), on the ic4/ic5. I assume they're tied together, but where else do they go?
chacal231077
Grand Master
I just watched and tested with the multimeter's buzzer Beep Beep.
I indicated in red the link with A19 to IC5
I saw on the PCB in IC4 that it is written 27C4001
I put a photo of the underside of Socket IC4.
I indicated in red the link with A19 to IC5
I saw on the PCB in IC4 that it is written 27C4001
I put a photo of the underside of Socket IC4.
it sounds like despite the silkscreen it is designed for a 8Mbit chip.
What speed are your Chips? you should make sure you're using 100ns or faster.
What speed are your Chips? you should make sure you're using 100ns or faster.
Conversion across the world...
@twistedsymphony do you have either of these pcbs or a similar one to confirm? that pin 16 of the 74F138 is VCC so I would think that needs to be taken out of circuit with A19, but I don’t wanna have him cut traces without confirmation!
@chacal231077 you may find that ic4 pin1 connects to ic5 on one pin, and ic3 pin1 connects to ic5 on another pin. Possibly both are being held high with voltage.
you could insert a socket into the existing socket to both of those, and bend the pin 1 so it doesn’t connect there. Then you’d run a separate wire to the other spot on ic5 so that it’s only connected there. Maybe @twistedsymphony can confirm first. This would test it before cutting any traces on the pcb.
I’ll see if I can add a photo to explain
@twistedsymphony do you have either of these pcbs or a similar one to confirm? that pin 16 of the 74F138 is VCC so I would think that needs to be taken out of circuit with A19, but I don’t wanna have him cut traces without confirmation!
@chacal231077 you may find that ic4 pin1 connects to ic5 on one pin, and ic3 pin1 connects to ic5 on another pin. Possibly both are being held high with voltage.
you could insert a socket into the existing socket to both of those, and bend the pin 1 so it doesn’t connect there. Then you’d run a separate wire to the other spot on ic5 so that it’s only connected there. Maybe @twistedsymphony can confirm first. This would test it before cutting any traces on the pcb.
I’ll see if I can add a photo to explain
I don't, I've skipped all of the Taito FX-1B PCBs since those games run on G-Net
So IC4 Pin 1 connects to both IC5 pin 6 and IC5 pin 16?
chacal231077
Grand Master
Hi!
I have saved the 2 original eprom.they have a timing of 100ns.
they are in the erasure phase, it is long .as soon as it's finished in 40 minutes.
I inform if it's ok or shit lol
I have saved the 2 original eprom.they have a timing of 100ns.
they are in the erasure phase, it is long .as soon as it's finished in 40 minutes.
I inform if it's ok or shit lol
chacal231077
Grand Master
Hi!
There is a better but it is not yet.The game boots to bios then loops
.I do not know if programming E25-10 in addition will solve the problem?
it reminds me of my problem with Bloody Roar same thing, it does not pass the bios boot
There is a better but it is not yet.The game boots to bios then loops
.I do not know if programming E25-10 in addition will solve the problem?it reminds me of my problem with Bloody Roar same thing, it does not pass the bios boot
Is the main motherboard you’re trying to play it on your fighters impact board?
chacal231077
Grand Master
Yes full PCB Fighter Impact .
I reprogrammed the 3 original fighter impact eproms with the impact fighter set rom A this does not work