12 Nov
2006
12 Nov
'06
4:27 p.m.
I have a load of these chips from NEC... Can anyone help me identify them?
NEC D8041C
It's a 40-Pin DIP Chip. And I've been unable to find any information
on-line about it.
This is the NEC version of the Intel 8041. The 8041 is a microcontroller,
based on the well-known 8048 microcontroller family, but it also includes
an I/O port circuit that lets it appear and an I/O device on another
processor's bus. A very well-known application of this is the keyboard
interface in a PC/AT (or later) machine, this uses an 8042, which is the
same devce with more intenral ROM (and RAM?)
The 8041 is a mask-programmed device, which means a program was stored in
it when it was made. Do you have any idea what this program is (is there
a copyright on the chip (other than NEC or Intel)? A part number other
than 8041 (and a date code?)
-tony