I've recently come across a few 40 pin DIPs with the following on them:
P87c521
L1027a327
Intel ©1980
From what I can tell they are an 8 bit Microcontroller, but my quest for a data sheet has come up short.
Every site I've found that claims to have a data sheet wants money for me to see it. I would have thought Intel would have something but searching their site for p87c521 doesn't pull up anything.
Is anyone here familiar with this chip, what its specs are (ram/rom/fuses/sram/clock speed) or does anyone know where I can find a real data sheet or am I just stuck having to pay some third party which to me doesn't seem legit since they're distributing a document written by Intel?