Shinobi for the Neo Geo!

[littlecharlie]

Hi guys, this would be my first repro attempt, so will appreciate the help.

The eproms I think i need, based on what you have explained here, are:

1337-m1.m1 (64 kB) -> 27c010 (double the rom size)
1337-s1.s1 (128 kB) -> 27c010
1337-v1.v1 (4MB) -> 2 x 27c160
1337-v2.v2 (4MB) -> 2 x 27c160
1337-c1.c1 (512 kB) -> 27c4002 (or 27c4096)
1337-c2.c2 (512 kB) -> 27c4002 (or 27c4096)
1337-p1.p1 (512 kB) -> 27c4002 (or 27c4096)

Correct?

 

[GarouSP]

Hi guys, this would be my first repro attempt, so will appreciate the help.

The eproms I think i need, based on what you have explained here, are:

1337-m1.m1 (64 kB) -> 27c010 (double the rom size)
1337-s1.s1 (128 kB) -> 27c010
1337-v1.v1 (4MB) -> 2 x 27c160
1337-v2.v2 (4MB) -> 2 x 27c160
1337-c1.c1 (512 kB) -> 27c4002 (or 27c4096)
1337-c2.c2 (512 kB) -> 27c4002 (or 27c4096)
1337-p1.p1 (512 kB) -> 27c4002 (or 27c4096)

Correct?

I've made one, this is what I used
M1 - 27c010
S1 - the correct one is 27c1000 non jedec but 27c010 can be used if you made a pin swap between pin 2 and pin 24
V1 and V2 - 27c160
C1 and C2 - 27c160, I don't know if 4096 can be used.
P1 - 27c800 if used on P1 or 27c4096 i used on EP1

 

[littlecharlie]

I've made one, this is what I used
M1 - 27c010 OK
S1 - the correct one is 27c1000 non jedec but 27c010 can be used if you made a pin swap between pin 2 and pin 24 OK (S ROM needs to be Non-jedec)
V1 and V2 - 27c160 OK
C1 and C2 - 27c160, I don't know if 4096 can be used. C1 and C2 are 512 KB, I would assume 4096 or 4002 are the correct size. If you use 27c160 (2MB), do you copy the ROM 4 times?
P1 - 27c800 if used on P1 or 27c4096 i used on EP1 OK, but can you explain why?

Thanks GarouSP. Some additional questions on the quote

 

[Supergun]

M1 - 27c010
S1 - 27c1000

V1 - 27c160
V2 - 27c160
V3 - 27c160
V4 - 27c160

C1 and C2 - 27c160 would be a waste. And yes, you would have to double and double again the data.
But no, 4096 cannot be used, rather you must use 27c400 or 27c4000 or 27c4200
P1 - 27c800 would be a waste.
And yes, you would have to double the data.
P1 - use 27c400 or 27c4000 or 27c4200
OR
EP1 - 27c4096 or 27c240 or 27c402 or 27c4100

 

[GeorgeSpinner]

M1 - 27c010
S1 - 27c1000

V1 - 27c160
V2 - 27c160
V3 - 27c160
V4 - 27c160

C1 and C2 - 27c160 would be a waste. And yes, you would have to double and double again the data.
But no, 4096 cannot be used, rather you must use 27c400 or 27c4000 or 27c4200
P1 - 27c800 would be a waste.
And yes, you would have to double the data.
P1 - use 27c400 or 27c4000 or 27c4200
OR
EP1 - 27c4096 or 27c240 or 27c402 or 27c4100

I don't agree that 27C160 for C1 and C2 is a waste. 27c160 are cheap are readily available.

You can get 27C160 for $2 each or less.

It's not a big deal to double the ROMs.

 

[littlecharlie]

M1 - 27c010
S1 - 27c1000

V1 - 27c160
V2 - 27c160
V3 - 27c160
V4 - 27c160

C1 and C2 - 27c160 would be a waste. And yes, you would have to double and double again the data.
But no, 4096 cannot be used, rather you must use 27c400 or 27c4000 or 27c4200
P1 - 27c800 would be a waste.
And yes, you would have to double the data.
P1 - use 27c400 or 27c4000 or 27c4200
OR
EP1 - 27c4096 or 27c240 or 27c402 or 27c4100

Thanks

I agree that technically using a larger EPROM than required is a waste in terms of space (when there are available smaller eproms that can fit).

But yeah, nowadays most eproms are cheap and that's not much an issue

 

[GarouSP]

Well I don't have a lot of eproms avaliable, so when I buy It I prefer to buy larger eprom so if I need more space I have one that suits, if its not the case, I just double the file.
I prefer that than buy different types of eprom, here in Brazil I don't know a good place to buy it, and when I find it the price of one or two I can buy ten at aliexpress, the downside is the time to arrive.
@littlecharlie about your question about 4096 for EP1, technically I can't explain but I think that is for reducing custs, everytime that you use a large eprom you should fulfiil all the space, if some blank space exists, the is a chance that the blank space is read and a problem could occur.
S1 uses a non jedec eprom, but you can use 27c010 if you swap pins, depending on what eprom burner you have, you can't program 27c1000 non jedec pinout, so you make an adapter to program it or uses 27c010