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From: v999qjvc@ubvmsb.cc.buffalo.edu (Mazram I Mahmud)
Newsgroups: sci.electronics
Subject: RCA MicroSystem CDP 1802 uP
Keywords: CDP 1802 Architecture
Message-ID: <32839@eerie.acsu.Buffalo.EDU>
Date: 15 Aug 90 17:51:43 GMT
References: Technical Manual for  CDP 1800 series
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	greetings,
		I just got microboard containing CPU,RAM,timer,
and Parallel devices made by RCA microsystem and also its 
specification sheet.
 	I wanted to build small system around this device so that
it can communicate with external peripherals (external RAM,cassette,etc).
Now, the problems are :
	
	1). The specification sheet doesn't give enough details about
	  CDP 1802 architecture ( bus timing, signal conditioning etc).
	  Do you folks have Technical Manual for this kind of uP
	  or know where can i get one. The address of RCA microsystem
	 is definitely better.
	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 ?

	System :
	  CDP 1802 by RCA microsystem (microboard CDP 1864)
	  2 parrallel i/o port.
	  2.0 Mhz crystal shared by cpu and timer.
	  1 Kb internal RAM. CPU can address up to 64 Kb.
	  User breadboard area.
	  EPROM expansion capabilities with built in 3 sockets, accepted
	 ROM,PROM.

		thanx

					mazram
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p/s:	I purchased this stuff from ALL Electronics, Cal. If
	you interested in getting one, please e-mail to above account
	so that i can provide the addresse and phone number of the company.
	total system is only $15.00