Free (old!) micro-processor

[wb4jfi at knology.net]

I would like it, but I'm not local in DC.  I have used them in the past.  If 
you don't get a local interested, could you mail it to me in Charleston, SC? 
I'll pay the shipping.
73 & tnx
Terry, WB4JFI


-----Original Message----- 
From: Gerald Wolczanski
Sent: Friday, March 29, 2013 3:17 PM
To: tacos at amrad.org
Subject: Free (old!) micro-processor

Sorting out some of my parts and I find a "CDP1802", a 40-pin device.
Researching I find:

The RCA 1802 has a static CMOS design with no minimum clock frequency,
so that it can be run at very low speeds and low power. It has an 8-bit
parallel bus with a bidirectional data bus and a multiplexed address bus
(i.e., the high order byte of the 16-bit address and the low order byte
of the address take turns in using the 8-bit physical address bus lines,
by accessing the bus lines in different clock cycles).

The RCA 1802 has a single bit, programmable output port, and four input
pins which are directly tested by branch instructions.

Its I/O mode is flexible and programmable, and it has a single-phase
clock with an on-chip oscillator. Its register set consists of sixteen
16-bit registers. The program counter (PC) can reside in any of these,
providing a simple way to implement multiple PCs, pointers, or
registers.

MORE IMPORTANTLY:
The Galileo spacecraft used multiple 1802 microprocessors

ANYBODY WANT THIS?

Jerry
KI4IO
Warrenton

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