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<br />� �����r���p�t'�ulput status request. ,,'
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<br />,�'`���,ff �qu�p�ent is � conn�cted to the 160 . The 160 carries out one of its assigned opera ' 4t;
<br />�,° t�j hr �, � tions at a time, e.g., com ute, in ut or out ut ; ''
<br />��xi� . te�'° vxa the ' mput-output cable, which con- 1? p� P r'
<br />,������'��� �' `` ' ` '� Thus both the in ut and out ut lines ma ' ternu- '
<br />i'� 0�,�� 1�� m p u t l i n e s, 1 2 o u t p u t � i n e s; a n d s e v e r a l P_. �' y.
<br />��`� '� ' nate in the main switching ;register Z: '
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<br />B � i� c%� X u�% e�; u i� l u d u i g e x t e r n a l f u n c t i o n r e a d y, , _ ,,?
<br />t�,��� u e s t, � n d o u t p u i r e a d y The five instructions related'to in put out put � �� �`^
<br />���� ��� �y:� c� operations are: ?2 73 74 75 and 76. The 75 ,; � .�' �
<br />�•��t YI � .� .. �.. . .
<br />£ e��2,'[�t�pu� I�nes are dual purpose They carry ' ' ' ' ` ' ` `'
<br />�Z.��4�,, , - instruction s'rgnals . the approp�iate . penptieral `� ' ` ; � '
<br />����2�,li�ts „o� output inforinatton ,from the 160 - ` ' � �
<br />,,,,�a �w � device to connect to the input or output lines `
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<br />���ternal d�vice They' also ,carry external The 72, 73, 74, and 76 instructions transier : `Fa't
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<br />a�i.1 �n�o�'tation to; the contzol unrt of �the � , ,-�3;
<br />the data.
<br />�; �al� e+�uipment �The type of information ' ; : ';
<br />,����, � � � - - �Once an input or output selecnan has been � � , t ;
<br />� put ut XXnes as determined by an : accom- � �. ;
<br />��,,��-�� ; p� ,�r r - � - - made -by' the External Func�on �instruct�on iri the ,, ; «�.
<br />e�ing��sYgnal, �t�� also appeazs , on the output ,
<br />�.�,,�, ��� ��: ; � � j,, .� ' case of .paper `tape ; and other non-block transfer � ' ' �1 �` i
<br />; ,�,��r, Qn ;�he ;external f unction � ready line � ' , � , ,�::
<br />�,�,;�r n a �,� - devtces; 'any , number: of successiye mputs or ;out ' r;;
<br />`�`�%12 =m t lines are' also dual u se ..Nor uts ma lie made without`: anottier external func � t � `
<br />�� pu�,S � P�. P.. Y „ , F,�;
<br />�` Pi"-�i��� �'r''��h, s a -- } i - _ .^ .. . . . . :- : :
<br />�th�yi c�rry up ta �.2 bits of input uiformatiu� tion Any time a change is made fromt input ta ;; ' ; i, ' j
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<br />��K py� G'���.. £ -�+ . �, '.� ...� ;, �.:., . . -' :: , ' �. . : - ..
<br />�s � ��fer�nal°�evice;ta the' 160��":A,fter a status � output :or vice versa, �or; whenever .a �change o� ', � ' �"��
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<br />e,�� �X�r�al funet�an, the input hnes carry: equipment is. - made, �ri , External Funchon ux -: x,
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<br />�t d�.j]i��t�f,.�st� t�s tnft�rmatxon,<wh�cli is read mto struct�on inust;�recede the'input:or out put o p era =� 7
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<br />����60 ��y a� �nput inskruction Status infqrma tton af , a block-transfer device; s�uch as magnettc :
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<br />q,��nxs;��x�e�ttf'iec� ; by tlie �act > that ` it is the first tape ar , punched . carci equipmenti ,�, n
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