2716 is now obsolete and fresh chips are no longer longer available. You can only get used ones. Don't know about the other two.
Datasheet can be found over here: **broken link removed**
Thanks for the info. Can you check the link, I haven't been able to get to it.
I figure the chips would be obsolete, the guy I got them from bought a few dozen of each and never used them, he was cleaning out the closet. But if they can be used - I gotta do it.
Intel d8749H is a microcontroller based on the old 8048. The other number you listed beside it is probably the lot number. The 7 in the number indicates that it has built in eprom. If it has a window it can be erased, otherwise it would be a one time programmable and is probably of no value. The 49 family was a very popular microcontroller for keyboard controllers in PCs for several years.
To check if the micro is programmed you will need a prom programmer so that you can dump the memory. If you see all the same value of hexadecimal digits it can probably be used. Otherwise if it has a variety of hex digits it has been programmed. As I said before, if it has a window on the top you can put it under a UV light to erase it and then reprogram it.
One source you may want to check is http://www.microcontroller.com
Another for that series is http://www.8052.com
These links may point you in the direction of some free development tools for the part.
The 8048/49 is a predecessor to the venerable 8051/52 family, but, has its own unique limitations for programming. Personally, I hope I never have to see another one professionally again. The page limitations are a real pain in the backside at times.