|
;JUMPS AND r�3TOPS .
<br />' ' Average
<br />Qperation Exeaut�on
<br />` ' Code"
<br />',Teme µ,s
<br />�
<br />„ , '. . 23 �
<br />�s z��o F , , : 23 0
<br />is not zero-s ' � : 231 ;;
<br />is �ositive'A . �3 �T,,� 4 d
<br />s ne�ative:� � 23 3..;
<br />tpi,f4
<br />' . 28 4
<br />� . . ,, �
<br />�p if q ,
<br />ro k; 'k : ` > 23 5 , �
<br />�P if Q � , 72
<br />�� ��` i� r r ' 2� � ;. , ,'
<br />, :, �, �
<br />i� ifi, Q ; y
<br />fe + 4 �� ; 23 7
<br />t ,
<br />:� l
<br />p�J.. { , � 4 �. 7� � � d
<br />�,} �, J � ,
<br />nditionallY' S; �5 0 t ' '�
<br />+. y ,
<br />Br�KB� #L : r � �
<br />1F: y �
<br />: ,� , , Y' 75.'� ° :
<br />�r `K�y7�2 ' .
<br />�f �� t� 4'� l 1� O
<br />���''�' � �' • r: . �S 2
<br />LL � >
<br />�r �tey � � �, �
<br />y 5 �
<br />; ,k'f' t ; `I�� .:y' \ r
<br />; �
<br />t , . : . ��7'S 3 �;� ,
<br />> >' � ,
<br />�nally � : ,�75,4` t i
<br />��i�;Lever :` �� :.
<br />Se�:: � � ' S 75.5 .
<br />, ;
<br />> if;,[�ever ` , .7 2
<br />iry �
<br />� �.
<br />5�t � } J'5 6
<br />�r .; � :.
<br />i`if';Lever, �� ,' ; � � ,
<br />SeE ;, ,' ' .' � .�7'5.a '. � t
<br />� � � ; ,
<br />�'� '�' `� � n%�� i:
<br />,� � . � . '
<br />litrati�fty `' � �
<br />,
<br />mp) . ! t 7'6 q �
<br />,K�y �� ; �, , -
<br />, , � ,
<br />mal;:Jump�;. 761 ' , '. `
<br />��Y �►2' � � A ,
<br />� ,' 4:0
<br />��) �JNmp) ' � 7:6,2
<br />� KeY �3 ' �, , � ,
<br />' � �76 3 '
<br />na�1 �np?
<br />. ,
<br />t(dnally � ° ,' ; '
<br />P� �
<br />��.�s .��� 764 �
<br />�ie�'.�!1 + �,, �'� �� .. .. t ; � . , , . � .
<br />,:�:1+
<br />Sp�cia� �rogram�n�n Featur
<br />�' es
<br />EASE OF HANDLING CONSTANTS
<br />• Special instructions permit the programmer to enter
<br />constants from the instruction word �tse1#.
<br />SPECIAL INSTRUCTIONS
<br />• These permit the programmer to increase the A or the
<br />Index Registers by a value in the instruction word
<br />itself.
<br />INDEXING
<br />• Availability of 6 Index Registers (B-Boxes)-ailaw
<br />�multiple address modifications without extraneous
<br />housekeeping."
<br />• Indirect Addressing—simplifies table look-up and �
<br />sorting, `'
<br />o Both count down and count up indexing—available on
<br />the 1604 to pertorm tooping. Both can be used at the ;r
<br />start of a loop as well as at the end of a loop. ''
<br />F:
<br />FOUR SEARCH 1NSTRUCTIONS �'
<br />,
<br />• Equality Se�rch — searches list of words to determine '
<br />equality with value in the accumulator, r
<br />• Threshold Search — searches list of words to deter- +�
<br />mine if any word is gr�ater than value in the accumu- i'
<br />lator.
<br />� Masked Equality Search — searches list of words to
<br />determine if a portion of any word is equal to the value `�
<br />in the accumulator.
<br />e Masked Threshold Search — searches list of words to '
<br />determine if a portion of any word is greater than the t
<br />value in the accumulator. �
<br />FLOATING POINT
<br />, �:
<br />� Allows extreme ran�� of values to be stored or oper-.
<br />ated upon without extraneous "housekeeping;' di�cuft �
<br />manipulations, or unnecessary loss of significance. 5
<br />HIGH-SPEED INPUT-OUTPUT TRANSFERS
<br />• Block transfer of data can be transmitted to nr from
<br />the computer at computer speed.
<br />BUFFERING
<br />• Data can be transmitted to or from the computer
<br />asynchronously with the main computer program.
<br />EXTERNAL FUNCTION
<br />• Provides control or condition sensing communication �
<br />,with peripheral equipment by main program, t
<br />;;
<br />PROGRAM INTERRUPT ;�
<br />o Permits interrupt of main computer program for higher '
<br />priority operations.
<br />;r
<br />LOGlCAL COMMANDS , , `�;
<br />� Permit bit-by-bit analysis and/or interpretation of se- `'
<br />lected portions of words in computer memory; �'
<br />;.s
<br />;;:
<br />;_
<br />��:
<br />'; .
<br />,:.
<br />,�;:,
<br />�� � ; � ��
<br />kri
<br />- , z�
<br />f�y'7.
<br />� 7 k
<br />_ .. , . . . �. ,. . , ,.,� ...._...,��:F�f�
<br />
|