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View Full Version : HELP ! TURNING NORMAL EPROM "27c256 or 27c512" IN LATCH EPROM LIKE 87C257



mexanico1971
18th May, 2014, 03:09 PM
HI !
I got one ECU in my car bosh MP5.1 that use a 87c257 latch time eprom , and I need to use one NVram Dallas DS1230 to do emulation or what we call chiptuning in real time !
On my car comum 27c256 not work, so I got to made an adapter width 74HC373 or other lacth chip !
Dave from MOATES show me here to buy one but shipping wil take 4 week"s !
so I decide to do one !
I search on web and find some shemes but I"m not expert in read this shemes !

I gona left some pic"s of what I found !

the 1st pic is the one I need to do !
the 2? is one sheme I found !
IF Some one have complete sheme please share !

thank"s in advance

BR

Carles20vt
22nd September, 2015, 08:53 AM
Hi,

You are doing a interesting thing. But i don't know if you made the latch adapter. Have you success with it?

Best regards.

mexanico1971
2nd October, 2015, 10:08 PM
it work"s :-)

dognaldo
31st December, 2016, 03:04 PM
it work"s :-)

Hi, I?m trying to make a adapter to my Bosch MP9 with 87C510 to use a 27C512.
I look one for buy but can?t find.
May you share what whorks for you ?

[ ] ?s Naldo

mexanico1971
23rd February, 2017, 12:15 AM
Hi, I?m trying to make a adapter to my Bosch MP9 with 87C510 to use a 27C512.
I look one for buy but can?t find.
May you share what whorks for you ?

[ ] ?s Naldo


HI !
Search on Web , you will find what you need !

Good luck
Brs

Sosiek
6th November, 2019, 12:18 PM
HI !
Search on Web , you will find what you need !

Good luck
Brs


Helo Guys, i have now simillar problem with my UrS6. Fuel map is possible to tune but boost map use 87C2578 and i looking everywhere to get some adapters but nobody sell it. Do you have idea who can make me one or diagram to make own one ?

Thanks in advance

Regards

Mike

Zhuexving
11th February, 2021, 08:11 PM
hello! could you send me where can i buy it or print? :)