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From: whit@blake.acs.washington.edu (John Whitmore III)
Newsgroups: sci.electronics
Subject: Re: RCA MicroSystem CDP 1802 uP
Keywords: CDP 1802 Architecture
Message-ID: <6469@milton.u.washington.edu>
Date: 17 Aug 90 23:27:39 GMT
References: <1800> <series> <32839@eerie.acsu.Buffalo.EDU>
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In article <32839@eerie.acsu.Buffalo.EDU> v999qjvc@ubvmsb.cc.buffalo.edu writes:
>
>	greetings,
>		I just got microboard containing CPU,RAM,timer,
>and Parallel devices made by RCA...
> 	I wanted to build small system around this device...
>Now, the problems are :
>	
>	1). The specification sheet doesn't give enough details about
>	  CDP 1802 architecture ( bus timing, signal conditioning etc).

	If you can't locate an RCA representative (in the Yellow Pages...)
try Harris; they bought most/all of RCA recently.  Alternately,
there's a good treatment of the 1802 in 'An Introduction to Microprocessors
Volume 2: Some Real Microprocessors' by Osborne/McGraw-Hill.

>	2) This  microboard has EPROM  expansion built in.(up to 4 Kb)
>	   Now, do i have to write rom monitor using C lang. or Assembly.
>	   if assembly, is there any kind of Assembly routine for this uP ?
>
	Try to get hold of 'Programmer's Guide to the 1802' by Tom Swan.
Hayden Book Company, 1981.  ISBN 0-8104-5183-2
This book includes source code for assembler/disassembler for the 1802
(resident, of course, on the 1802...).  It will be tricky to get
this working, but it should fit easily in the corner of an EPROM.
	You might also look into ROM-based FORTH for this machine;
try posting in COMP.LANG.FORTH.

		John Whitmore