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TITLE	MCODE1 	DX20 MICRO-DIAGNOSTIC OF THE MICRO-PROCESSOR  VERSION EDT'.'VER





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	COMMENT	$

	MCODE1 TESTS MICROPROCESSOR WORKING MEMORY AND THE MASSBUS DATA BOARD.
FOR WORKING MEMORY, IT CHECKS THAT ALL BITS IN ALL LOCATIONS CAN BE WRITTEN
AND READ.  IT ALSO CHECKS THAT THE ADDRESSING LOGIC IS FUNCTIONING PROPERLY.

TO CHECK THE MASSBUS DATA BOARD, THE DIAGNOSTIC PERFORMS SOME PARTIAL MASSBUS
HANDSHAKING SEQUENCES AND CHECKS FOR PROPER RESPONSES.  IT ALSO SIMULATES
READ AND WRITE TRANSFERS TO VERIFY THE PROPER OPERATION OF THE DATA PATH
LOGIC ON THE MASSBUS DATA BOARD.
$
	RPTCNT==100			;SET REPEAT COUNT TO 100 TIMES
	RHDATA==1			;ASSEMBLE THE RH20 DATA TRANSFER
					;REQUEST CODE