about Fighting Vipers1 ROM dump

[gigagiga44]

I purchased the EPROM (27C4100DC-12) used in this game and tried checking it, but an error like the one in the image appears.

This is the same error with the same ROM purchased from another source.
The ROM writer I'm using is Xgecu.

There was no problem with another SEGA MODEL2 (Virtual-ON) game.

Also, when reading the actual ROM with Xgecu, most of it is filled with "FF" as shown in the image, which is a strange situation.
(Since the 27C4100DC caused an error and could not be read, I changed it to 27C4096, removed the ID check, and read.)

How can this be improved?

By the way, the game launches normally.

 

[nem]

Which model XGecu programmer do you have?

 

[CoolFox]

27c4100 is not equiv to 27c4096, it's equiv to 27c400

 

[sonic323]

Yes, correctly, 27c4096 has a different connection (pins)
You must use instead:
27c400 40DIP
Or
27c160 42DIP

 

[gigagiga44]

Which model XGecu programmer do you have?

i have T48 version.

 

[gigagiga44]

so.
As everyone told me, 27c400 40DIP
Or 27c160 42DIP
I tried this, but the same screen and error appeared.

Is 27C4100 a strange ROM?

Indeed, when I read mame's ROM on the 27c400, normal data was displayed.

However, I can't write because a pin error occurs...

 

[sonic323]

Try to read the eprom like MX23C4100.
Maybe it will help..


You can use these two eproms (27C400, 27C160) as a replacement if you don't have a good chip and you have these at home.
Download the program for Fighting Viper and burn on these chips.

 

[gigagiga44]

Try to read the eprom like MX23C4100.
Maybe it will help..


You can use these two eproms (27C400, 27C160) as a replacement if you don't have a good chip and you have these at home.
Download the program for Fighting Viper and burn on these chips.

Basically, if there are three types of images that appear on the right side when reading a ROM, it will fail with a pin error.

READ will succeed when the image is ZIF40.

Is there a problem with the Xgecu T48 that I have?
By the way, I also tried the 23C4100, but an error occurs with three types of images.

 

[sonic323]

I use the extension ,which connects to the T48.That is on the picture for chips
27C400, 27C800, 27C160, 27C322.
I'll try to find the 27C4100 DC 12 chip somewhere and see if I have the same problem when I'm home..

 

[sonic323]

I just tested the 27C4100 Dc - 12 chip

You are right, it says bad pin if it is marked MX27C4100 DC
The same behavior..
If I mark it as MX23C4100, it reads it correctly.
I used the extension..which connects to the T48
Especially, probably the T48 software has a bug..

 

[gigagiga44]

Thanks for the information

In other words, if it is 23C4100, it will be loaded normally.

However, if you are using the extension function, are you connecting some kind of board that comes with it?
T48 comes with some small boards, what should I connect to them?

 

[sonic323]

This original adapter cost me about 3 euros
And it can also load large chips directly 27c160, 27C322, etc.


This extension is necessary, without it you cannot upload chips of the type:
27C400,27C800,27C4100,27C160,27C322 and others.
And it will be displayed when you select the chip on the right side
This is an expansion that replaces the functions of the T56 programmer

https://www.aliexpress.com/item/1005005296724827.html?spm=a2g0o.detail.pcDetailTopMoreOtherSeller.1.76d8zGzGgd&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40050.354490.0&scm_id=1007.40050.354490.0&scm-url=1007.40050.354490.0&pvid=7a2caf11-df05-4ab8-a6fa-e2b44e1131f2&_t=gps-id:pcDetailTopMoreOtherSeller,scm-url:1007.40050.354490.0,pvid:7a2caf11-df05-4ab8-a6fa-e2b44e1131f2,tpp_buckets:668#2846#8111#1996&pdp_npi=4@dis!EUR!6.19!6.19!!!6.55!6.55!@211b61bb17293193811001862eb1b1!12000032532283437!rec!SK!4328029527!X&utparam-url=scene:pcDetailTopMoreOtherSeller|query_from:

 

[gigagiga44]

I didn't know that such an extension existed.
i now just bought

If you connect this to t48, you should be able to read it on 23C4100 also 27C400, right?

 

[sonic323]

Yes, that's why it didn't work for you, because you don't have an adapter..

If it is read as 23C4100, it is read as original, ID and Pin are fine
If it is read as 27C400 also ok, you just have to turn off ID Control.

You can write to both without problems.


These eprom 27C4100 and 27C400 are quite expensive.
Therefore, when I convert a game, I use 27C160 instead, which are relatively cheap
and I have about 60 of them.

 

[gigagiga44]

I see.
I did some research and found that 27C160 is very cheap.
It would be very convenient if it could be used instead of 27C400 or 27C4100.

Thank you for the great information!