On 01/21/2014 11:03 PM, cctech-request at
classiccmp.org wrote:
Hi guys,
I've looked trough my Z80 Stuff some minutes before b'cause a friend wanted
an Z80A CPU, ok found it. In a Bag 6 uPD780-1 which are also Z80A's, I found
two uPD7201C. I've googeled some time before that the uPD7201A is some
Z80-SIO - alike, has an other Pinout for example and should be compatible
Well,
it's synchronous/asynchronous serial chip, but I don't think it's
very similar to the Z80-SIO
Its a SIO like part (same register structure) with one
difference the
interface is
8085/8088/8086 compatable. Its awkward to use with Z80 and why would one
as the SIO can be had. The biggest differnce is the interrupt is a
Call(8085) or
vector(8088) and can interact with the 8259A.
FYI the part was created by NEC and the 8274 was the licensed copy though
Intel often lagged by a mask rev.
Try google.. If I had a scanner I have the NEC Microcomputers data catalog,
alas no scanner.
Allison