So I was tossing a bunch of my pops old computer garbage and this little chip beamed a light into my eyes. I picked it up and took it home.
It appears to be a 1megabit amd Eprom.
its a 40 pin, am27c1024-120lc square style.
Its a UV erasable chip with a 120 nano second read (MAX) and 50 NS (Min)
Chip reads 12.75V PGM on the back
They also have this chip in the rectangle style I see used so often.
Was wondering if I could use this in my ECM.

 

I've pulled quite a few eproms out of old computer motherboards, I've also scored several EEproms and a few flash chips too.

 

I've pulled quite a few eproms out of old computer motherboards, I've also scored several EEproms and a few flash chips too.

 

Any luck using them with the ECM?
Mainly concerned about the number of pin outputs. I found the tech specs and pin out diagram for this one so technically I should be able to use it.
How many pins do our ecm proms use?

 

Thirdgens use either 24 or 28 pin EPROMs depending on the ECM. ECMs with a socketed EPROM use a 24 pin 27c32, while ECMs that have a MEMCAL use a 28 pin 27c128 or 27c256. With a price tag of $1.45 for a 28 pin 27sf512 flash EEPROM, which will work in place of the 128 or 256, it's hardly worth scrounging EPROMs off boards--and they are erased electrically rather than by UV light which takes a lot longer so there's really no need for a bunch of spares.

I've salvaged EPROMs and other parts off computer boards but now mainly do it in a pinch rather than to save a nickel. In fact, I salvaged a 20 pin DIP socket off an old video card (really old) to build the fake SES circuit I built last weekend. One of the transistors came off a lightning struck power supply board from a satellite receiver. And, about a year ago I used a flash chip off an old motherboard to repair a fragged TSOP in an XBOX I was given so I could use it for video streaming.