Free (old!) micro-processor

[wb4jfi at knology.net]

Thanks so much Jerry!  My address is:

Terry Fox, WB4JFI
2436 Vaucluse Rd
Charleston, SC 29414

I may have some other COSMAC parts still around, but I gave my 1802 CPU to 
an AMSAT guy who was doing some development work a long time ago.  I will 
let you know If I get something built and running.  Now, where are my COSMAC 
books???
73, Terry, WB4JFI


-----Original Message----- 
From: Gerald Wolczanski
Sent: Friday, March 29, 2013 4:10 PM
To: wb4jfi at knology.net
Cc: tacos at amrad.org
Subject: Re: Free (old!) micro-processor

It's yours Terry - you were the first.

Send your your address and I'll mail it to you, free of charge.  How
heavy can it be?

Jerry


On Fri, 2013-03-29 at 15:22 -0400, wb4jfi at knology.net wrote:
> 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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