Need help programming JEDEC EPROMs

[TheCrow]

Hello everyone,
I have some JEDEC chips that I need to read and write to them they are d27c010 , when I looked them up i found out that the pinout is different on them, two pins to be exact

I tried lifting the pins and switching them using wires on the zif socket but won’t read , I’m using a tl866cs , Please help I have a king of dragons I want to fix

 

[skate323k137]

I have done this using the pin swap method you described, but not on that exact programmer. It should work in theory.

 

[TheCrow]

I have done this using the pin swap method you described, but not on that exact programmer. It should work in theory.

it reads but gives like 00 ff 00 00 ff
So not real data

 

[TheCrow]

I have done this using the pin swap method you described, but not on that exact programmer. It should work in theory.

I tried another eprom from a street fighter 2 cps1 pcb with the same method and it gave me data but when searched the file using rom ident it say no match found

 

[nem]

I've used an adapter with a TL866 successfully. I put two sockets on top of each other and jumped the two connections.

I think I remember @pacoarcade selling actual adapters? I suggest getting one.

 

[pacoarcade]

I have adapters available but payment is only available via SEPA transfer (european union). Gerbers are freely available: https://www.arcade-projects.com/threads/fs-jedec-to-non-jedec-adapter.11007/

 

[skate323k137]

I have adapters available but payment is only available via SEPA transfer (european union). Gerbers are freely available: https://www.arcade-projects.com/threads/fs-jedec-to-non-jedec-adapter.11007/

Very nice! I think the new topwin version sorted this but I might make one anyway.

 

[TheCrow]

I've used an adapter with a TL866 successfully. I put two sockets on top of each other and jumped the two connections.

I think I remember @pacoarcade selling actual adapters? I suggest getting one.

I have used this method with another eprom and I got data , should i do something to the code or is it correct as it is , because when I tried to find it using romident is said no match found ,
Thank you

 

[TheCrow]

Thank you all guys , I’ll be making an adapter for it

 

[nem]

I have used this method with another eprom and I got data , should i do something to the code or is it correct as it is , because when I tried to find it using romident is said no match found ,
Thank you

What eproms are you trying to read? Upload the data somewhere and post the link here.

 

[TheCrow]

What eproms are you trying to read? Upload the data somewhere and post the link here.

https://filebin.net/b56w418ywk93os45
Here’s the link for the file I got from the eprom 32B street fighter 2 world champion
When I checked with romident it said no match found

 

[AlxUnderBase]

Indeed @skate323k137's method and @pacoarcade are the go . i was prepared to go with Skate's , but Paco was super nice guy and make that adaptor witch helped me to write the files on 27c100's (27c301) eeproms

 

[nem]

@TheCrow, I guess you mean World Warrior?

I have an original WW here. On my board, 32 to 34 aren't populated. Looking at pics online, that seems to be the norm. The parent set (sf2.zip) in Mame is also the same.

Can you take a pic of the board you have?

Just looking at the data with a hex viewer, it looks OK? I think your adapter is working fine.

 

[TheCrow]

@TheCrow, I guess you mean World Warrior?

I have an original WW here. On my board, 32 to 34 aren't populated. Looking at pics online, that seems to be the norm. The parent set (sf2.zip) in Mame is also the same.

Can you take a pic of the board you have?

Just looking at the data with a hex viewer, it looks OK? I think your adapter is working fine.

I’m sorry it’s wold warrior I got mixed up between them , but why the file doesn’t show up in romident , I’m just curious if the rom is bad or they wrote the wrong data on it because it’s not the original eprom that came with pcb it’s a replacement

 

[nem]

It doesn't show up in romident, because the data you're trying identify doesn't exist in Mame. There could be a number of reasons for it. That's why I suggested to take a picture of the board.

 

[bodgit]

This is the quick adapter I made using two stacked sockets, just bend the two legs of the upper socket for the pins that need to be swapped and wire them to the legs of the lower socket. It worked fine in my TL866, you just have to ignore the chip ID as it will be wrong.

 

[skate323k137]

This is the quick adapter I made using two stacked sockets, just bend the two legs of the upper socket for the pins that need to be swapped and wire them to the legs of the lower socket. It worked fine in my TL866, you just have to ignore the chip ID as it will be wrong.

Yep, exactly what I made for my top3000 for fixing MVS carts.

 

[TheCrow]

This is the quick adapter I made using two stacked sockets, just bend the two legs of the upper socket for the pins that need to be swapped and wire them to the legs of the lower socket. It worked fine in my TL866, you just have to ignore the chip ID as it will be wrong.

Thank you I’ll be making one

 

[TheCrow]

It doesn't show up in romident, because the data you're trying identify doesn't exist in Mame. There could be a number of reasons for it. That's why I suggested to take a picture of the board.

Ignore the green labels I’ve used them to know where the placement of the roms,