4, 1954

Memorandum

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Page 1 of 2 pages

SUBJECT:

To:

From:

Date:

Abstract:

Digital Computer Laborator,y Hassachuset;c,s Inst.it.ute of Technology

Cambridge

39,

Hassachusetts

,f,. PROGR_~l{ FOR CHECKING THE CONTENTS OF TEST STORA.GE

'I

P. Arden. H. Bf-:'lo~ R. Gildea, F~ 'Shaw, !wI.' Solomita, J'!,Thompsont

Grcup.5 O..L..r...h, '~345

A:

^Siegel

October

4, 1954

I

A utility p;r-ogram :(}Dich checks the a ctual contents of test storage a ,i;~ :'y::st .~:£ Y:cl"'"tnal, contents is describedo

The registey·::~ ^v-"

in J:1emorandum :'H-3069~

" st, ~,~'C". are nor:c~811y set as indicated

~:.."'ag0 C.)ntents for

1954

CCSn'o As is indi- cated in that memoI"anduYt""", ~: .. ;':: tr,'.; Y'88ponsibility of any group 't.Jhich uses a different tc-st-stOY"c<;c p::,"oc~:~~n, to make certain tha~ the original contents is T",?stored berolNe ':',~:c(, CC:;i~2t~t,er is 'turned over to another group.

To i'acilitate doi::,,~: this, a utility program hz.s been written which may'ta used to ^comp2:c'e t::'lE:: ac-cua: contentspf t'est storage 't'1i~c.h

tne

normal settings. This P::"::C~~_,_,::l print.s on the direct typevJriter evert di,screpancy found. The .. , L1dic2t~_ons take one of the three following forms ~ each of which is ~,,_ll·-· . .;.;}~plE:nat,o:('Y:

05 shou2.ec be & flip-flop

19

should :10"i~ be a flip-flop

26 reads ~li~~~~5 shoul.d read 1.00032

All 2ddresses given in the l',:cint-out are decimal •. If the check of test storage is completed without finding any incorrect settings~ the following line 'i.E: '~yped:

Test storage cl1eck complete

To use the utility programp tape number 100-6-1234 is placed in PETR and the READ D~ b,utton is pressedo ,The program:' begins operating

auto~Btically as soon as the read~in is finished. ~o repeat the

program,

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^{page 2}

it

is necessary only to press S'rJ\.RT OVER AT

40;

the tape need not be read in again.

Copies of tape ntunber 100-6-1234 may be ob-t;Jined ,from the Tape Room by groups requiring its

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