(:::20archive.computerhistory.org/resources/access/text/2015/...08/2~/69 16,53 PAGE 3 /A PT .AG OF I IS A SPEC I AL CiJNVFNT I Oi\J 'THAT DECLARES A BLOCK IN USE AND UNFREEABI /TO

08/24/>69 l §, 53 PA@~ ·l

. ~~{t5 (:::20 ~- . ---~ ··-·;.:;·:~ 1~ 1 d(-~... sf'o~E ·Ext~AN.G_i;: -pRQ,t;RAM · ·----.-------··---------··------ · ----------------------·--- . -3·

.r--- .. i /ALA~ BEALE - 4 ·~l~'-.1,:•': 5·

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--"---e:: ... /!H I§ ·PROGRAM. GRABs~--ANo·--p,R,EE$'" BLOC1<S-·-oF·-·sroRAGcSPEClFI Eo···-ay-TH~USE'R-rO-TAKE""" · /PROGRAM 'rs·PA,8SED IN Xt A t'-!LJMERIC ELEMEi.JT} ,WITH Alt-ADDRESS FIE:t.DS AL.READY '.SET

/f.OR-T~E LOCA T-JON Fl§;LD, AND <rHE' Pf}QV IS tON 'THA i;; ·rBE' .-.h.E~GTH FIE;~D ·:cONTAl N§ )Ht ~ 1 -,-----'--/NOT--Ti:1AT.LENGTH·-.;..· l ii - -.. ·- ----·--·- -----·--·--,· ______ , ··---- ·-----·- ----- ·-- -·---- - ·---- -·-···-------~-~:n------:----) . 1Io FR~E STORAQE THE_ 'P:ROG:RAM rs PA~SEo I:\l Xl Ai'J ADDRESp EL~ME_·_Nr ~DINTING_ INTO Tl

- _ /BE FREED, .THE PROGRAM WILL FIND AND FREE THE BLoCK J!F IT rs FREEABLE1, ANb MA -~-----;ADD~~~s~s-IN'-·IHi:;:--c:ALt:;ING"-'PROCES$·--~OI'ii,JT!['iJG-Tf\JTq-·;-H_AT--H~PtK,. -. ... f4 .

- 1·6 /§TEe 1 --11 ... SAV!i. ALL REGJ Sit:Rs BUT .XO AND Xl5 oN rHE -:S·TACK, l,~ --'--- , · - - · - -. . - - -- ' --. -T"t ______ _

SMQ O frISABLC:: I NT:ERRUP"t"S x~ sro · xo· - · ·· · -- · 21 -----x·6 s·ro )to 22-----......--..;

X7 ~TO XO 23 -xs sro xo 24 -·- · ---------------···-----·-·-···-·xs-· -··.--·----·- -sro-·--·--·--------·--- _--·xo ··--·---·----- .. -----····-- .. ·----·-····--· ------------·-----·-------------·------- · ----~-2&

XI C STO XO .- 26 .

~-------·--·----·--·---!~~!_ ______ ~2:ci -------~---------. ------------------------- ~b _I

i l!HE· P~ECEDING REGI{S:f:~RS ARE USF:D BY THE PROGRAM; .AND so MU$T BE SAVEO, 'THE OTHI ! /ARE SAVED SO ,_THAT l'i':l "lHE FREe'. PROGRAM.11. A SPECIAL SCAN ·oF THE: R.EGIST.i=~S FOR &.AD i--------1~6E §··-NOl--NE'.EQ. :- ro-··si:: .: MADE;···--·· S2E-·'THE::-F' REE--PROGAM-:F.oR-'GREATER.:.DETAI ~;- . -· -- - '"" -, . - 34

i :~· X2 sTO · XO 35 ! ---··--·-··------------- X3--·-·----··s ro··--·----xo···------·---- 3-;.:;------

x-s · ·s'rb ,:;ro · 3.7 ·xi 1 ·sro xo ·4o --------·x r:'3 ---s10 ·---·------·--x o --·--·------------------------- ,:_ff·-.----xi 4 STci XO - -- -:~:2

L,_• --

. . . 4$ -.' -1IEST--T-A§-oN·-·>q--ro--'.0EtERMINE-·P~OGf3AM··-F,UN.CT'~-oN---;;.•-GRA~~IF-,"A::G-:-9, -, :fRf~-n.--i}·J~::e~ --.

~5 .. Xl CPY _ X t 4;~ --. ·

-· --.. ---·--··--- . ----·-----'-----. -- --AT ... -- ----.,--JCC --- -------'.·--·-p REE .. ·-----------'-···--··--- ---:-------:-·--.. _ -------·-·---- ·---~7- ------ - _- .

cT Jee ?SEUDPE iF CONTROL, .coNVER"T ·r;o.;i~PRE.§:S . - . X 1 O OATA O - :5,t . ~---- . ' --· ·- --- . . _·· . . . . . . . .$}2 . . . . . .

;§TEP 2 ~ ... ·FIND ADDRESS OF NE:XT ,A VA !.LAaLE .st,;pcK aF STO~AGE., ANf? l~GE:8T lNTP 'T;HJ= /OF THE ARGUME~T. _5,· - - .

-------'---..--;REG I STER iUSAG2·= IN ... TH IS ·sTEP--rs-:.::. ... -··-- - ··-· - . . --·-··-·--------·------·------·--·---------- .--·:55>-----------··--:--• I~'+ ;.; ... -TIJE USE~*S PARAMETER AND/OR RET.URNED VA\.:UE. . ~-f> , . . . /X6 ..., ... THE REGIUEsTt:D LENGTH - ·$::7.

·---·-···--- ·1 ~ 7 . .;. ... -POtN it R :::TO . i~ ORD ··,2 8 ····a F" ··n-ir::: --p R OCE S s· ·s ASE;---'WAJ cH-'PO I:N rs--rm--·rHE·-~·:e·L~o:cK:;10:F-:;;fiU . /~8 'l>• POlNTE:F~ TO _ y.iClsixQ 2.5 OF 'THE PROCESS· BASEo WH I.CH cprtTAJNS !'H:E :N!J.M.atrR Jgf' ,tW~i

. j I BOTH REL-AllV~ ·re tHE PROCESS STORA.GE PO.OL.1 OF' c.OURSE l . ··- - .. ;t>:2 . - - • l ___ _: ___ ""'7/~9 ; ... -,po IN.TE:R:-·ro ·rHt· ENo···oF-CORE" IN ~USE ·;sy··rH1s·· PROCEss------· :6'~ I .1X l O """" t:Nol§A!~s 1-JH~THER REQR~AN:I ZA TlQN HAS -.TAKEN PL.Aft '. . . 6:4

/~ 12 . ._..., ~OI NTEB ·ro wqRD 23 OF' Tl--!E '~Roers~ B-A§E, wH ICH. F_:>O I NTS T9 .Tl;l:E 'BEG I.NN ING I --------""··-··---·--·.·-------··· · - .. -·--· ----·--·--··---·-·-------------------- - - ----------- 66-,--. ·

(~. /S~T UP THE' PROCESS ~ASE: PQI ,\jTERS 67 I }!!;:;_~ ': - . . - - •' . -- • 7-b : - .... :~ (i~'AB - _______ : ____ , .. ,·x7·------··-·cPY -·-.--··---- ---·x rs·---------·-·~·---:···· ·---·---------······xT5''PO] Nrs-··ro-'lHE,"'!ClJRRENT'-"PROCi

- . X7 . MOD . 23 - rO PO I NT ·ra COR_E- B.EGllNNcI,NG ... X 12 CP Y X7 .. 73 . . - ...

.... ····-·-·--------..-....--.---.. ~--------

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08/24/69 16,53 PAGE 2 X7 - MOD 5 fo POINT ·rq FREE STORE X9 LD · X7 75 ·--· . ·' .. __ ....... -- ......... - ................. ., .......... _ .. _. ____ , ____ ., _____ 76' ___ .,,_ .-·--·----···

/,.:.:\\. /~ET UP X4 TO BE RETURNED TO THF USER AS ·A PO I NT;:-R TO HIS BLOCK OF STORAGE, ~- IATS LQCN.FIELQ WILL BE ONE GREATE~ THAN THAT POfN~ED !O BX X~ (SINCE TH~T LOCJ

·-·----· -··1A-HE.A.DER"'WORD l, .. AND' ·1 rs· 'LNG TH FI ELI) ·w I LL:.""BE''ONE""LESS""THAN-·wHEN" PASSE0--·9y-·T'HE""~L - - - .. . . . . . I 0? . . - -

X4 CPY X1 103 .. ---·-··-··----------LocN·---·--xF ________ ----· "X9~C! 37777 ···-----------NEXT'' AVA ILABLE-"LOCKffON

. X 1 . . LD X l + I . INCREASE BY 'f I 0.5 . . LOCN RF X4 ~AKE X~ POiNT "THERE -----_----- .......... ---------·- ·x4 . -·TAG· ........... - ·2 .. -_ ........ ______ .. __________________ : AKE ·rr--AN ADDRESS-ELEMENT

- 1 - - .... . LNGT~ xF X4+e37777 ~ET 'THE RE~UESTEO .LENGTH

Xli- - LIM XI·""! REDU~E-·srz§: BY 1 · ··-·---.---------------------·---------------------------------~----------~---·---·-- ---· · -· r-r-2· /CHECK 'TO SfE IF THERE Is i:-NOUGH .CO~E ·ro SATISFY THE REQUEST. IF NOT' PR I NT AN /MESS,AGE .. AND ,_EAVE, . - · .. . . ·.. - .. 114' .. I

.... ~-------- .... : .. -·::... ...... .- ... --=.:: __ .. __ :____ _ ___ ":",............... .... .. .......... _. ___ ............... - .. ------------------------.--'-----------...... - ........ -------·--n 5------------

x s CPY XI 2 . I 16 i

----------------~----~----~ ~---------.. ·-2 ~ ~ .. -----------~· 1 __ ----------~---------------:.-?..~ 0 ~ T ~ E ~gr~~~~-~~/ F F _B~-~~9 RDS I

s - .. . I

· ·x1 LD XI+! . . ~UMBER OF EREE WORDS USEe UP · SUS XR . c:OMPUTE THi:. UPDATED FREE WQRD Cl ... ____ .;.... _________ .. _____________________ ,, ________ ~····--·"TEST _________ ... o_ .. ,_ ......... _ ..... -------.. ----·------iF. NC:GAT IvE;-··GRAs··:cA·i~NOT-BE-:-MADI

GT JCC NOERR9 124 . . . -. :x l DA TA . 9 NUMBER OF ~Rf30f3 l'1ESSAGE

··------------··-- --,-,----., OM ----:-: .. ----c 22·4--------·--·· ~RROR-·PR.I NTER-T26 ___ _ TOM c23 ~XIT .. . 127

NDERR9 L.DR . X ! sAVE ·r~E F~EE CORE COUNT I:N .R <~--.... -· · --- .. ------ .. ·---........... ·· ... _____ --· ..................... _ --.. --- ..... _ ..... _ ......................... · ............ -- ....... -... --.. ----- ---·r3· r--.. ------. ·------------"--· : l§ET UP THE HEADER WORD FOR THE :NEW at.:ocK ... AND CREATE A NEW HEADER FOR THE REST

/AT THE F'IRST FREE WORD POINTED ·ro 'gy ··x9., WILL Bi:- A HEADER .. WORD ~JITH A :2-IN ·tHE ·-·:------1 lND I CATE· THAT.:-::lrs-sTORAGE·--·1 S ·Nor---IN usE·a-~-lTS-:LE .. GTH·--r s·-rHAT~-oF-'THE--REMAlNDE'R--0 . . .. .. ... N - .. ... . . .. • /STORAGE POOL, . . · . . 135, . . . 1 /~8 .f.s··Now uSEQ AS A WORK REG I STE~ FOR CuNST~uCTiON OF THE NEW HEADERS~ . , , ___ ----- ................ -........... _ .. ____________ ...... ....... .. .. ____ ... -- ........ -... -- .. ---- ................ ·· · · ...... . ................... _________ ...................... ____ ---- .............. -... -... -........ ________ r31 ··-------------

x a LD X9 . ~LO HEADER l~O .. LNGIH :xF X8+e37?77 AMOUNT· OF ~ONTI_GUOUS :sTO~AGE L~ . ------------......... ___________________________ ·1Esr··---------X6 ........... ---·-----------------------·rs·-THT~:i".ENOUGH _______________________ .. -

. · Gt?: JC~ . NO~EOR§ IF SO, - NO .'GEOR'?A.I_ N.I.ZAT I ON :i'JE~ES

, ........ -~-----;~EE .... I~ R.EORGA~ I ZATI qN --HAS ·:Ai..;REJ.:DY-TAi<EN PLACE,---,--iF·-rr···HAs:,---rHENJ~~ I NT:AN·-ERROR-- . ~ - - -. . .. /qTHg~~ISE, ~E9RGANIZE~ 146

. 147 ··------- ·--··---·--·_-,-·-·------·--······-.. ······-·---·-~---····cLA .... ----------·-·-····x 1 o ···-·········-······· · · · · · · 100 · . · ... ·

zt:: JCC · f~EORG x I,Q WI L.L BE ONE IF RE ORGAN I ZAT I X-1 DA i A . 1' I . .. ~ . - 152. . ·------------·-·-·-- ------····------............. --.. --.. ----·ro~~ ............ --............ c 224 ..................... - .............. , ... -................ _ ............ ·. -· ......................... _ ... ________ ·1·5.3-----·---·-----------

·roM c23 154 R~9R~ . 1 sv·s . c 22~ , . REORGAN r ZE I ss ,------- · .. · -·- -·----·xro ------DA TA --------·-r-- ··--------------------------sET"'"X 1 o· ----------156 ____________ _

1

• x 1 cPY · x~. · · 157 ·

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LNG.TH i;F X'++e37777 .- 160 ': .......... X 1--·- ·--··cpy· ······--:--·' ···x4 . ............... :.._:. ------·····"· ...... RECREATE' 'THE-'PARAMETER-PASSED"'-I

Xl. TAG O .. . ,-AG IT NUMERIC .. - . . . J - GRAB rRY AGAIN - .. . 163 ...................... :.......... . ............. . ................................. _ ........... - ........... __ ....... -...... -......... ______ · . 164 -------

/~OW F~X PTA~ !N THE HEADER WO~n., ETAG CAN B~ o,T, OR 2, · 165 I A Pi /1. G OF 2 S I G N I F I ES A FREE 8 LO C,K I A PT AG OF Z ~·RO · S I G N I F I ES A BLOCK I N USE, .

. ···-·· .. -····"~ • . .:~- ···-~·-···-··-:. •. ~---~-- ---·--·--·----------· -=--·-~ ----·-··--~···. ···------~-·--"'·'-·-····--····-----~----,•"" ·--~-- .. ,., ____ ... _____ .. ___ ... ··- ···-····"'·-··---·-- ~- _____ ..._ ________________ ~-·--~---

I

I I 08/2~/69 16,53 PAGE 3

/A PT .AG OF I IS A SPEC I AL CiJNVFNT I Oi\J 'THAT DECLARES A BLOCK IN USE AND UNFREEABI /TO AEQUEST AN-UNFREtABLE BLOCK, H~VE tHE AR~U~E~T IN.~1 HAVE A PTAG OF~· OTH~(

, --~.:,:;;:~·- /G ! VE Ir-· A PTAG 'OF ZERO, -- .. _ . -·-·--·-· _______ .. ___ .......... 1 7 r·-----·-··-·-· I , I ' -. ' - ·• • - .•

(" 172 I

, \.___) NOREORG STK )( 1 b 1'1PDA'TE THE FREE CORE COUNT : .. _______ ..:_: ____ . · =---·x 1 o ---sro-------x 15+25-· : ·----=--. ___ _:__17'+ .. 1

! • X8 LIM X6' ! ~IM BL9CK !O NECESSARY L~NGTH I PTAG XF X4+e:37777 i REPLACE PTAG OF X8 WITH THAT OF

.. -··------ -· - -·--- .. ------ ---p I A G---·-.KF-- ·---.. -·---- .. X8+c 377 77 --·-----·------.. ·-·----- .. ·------.. ---- -- ___________ .. T7T __ .. _ - · . --=-

. ITAG xF X4+e37777 ~UT ITAG-OF X4 ON X8 I TA~ RF xsv-e.37777 ! . - . . 20 I.

-----· -·--·--------xs--·---·-.. sro-------x9---- ·---------;---------·8roRE-AS-H2ADER--woRo-,. . - 203.

/BEFORE ANY STORAGE IS USE~ IN THE STORAGE POOL, WORD 23 POINTS TO A BLOGK EXT! -----/LENGTR-.. OF-·-THE:..:PoOt:..T:_:THE ··FoLt;OW ! NG · CODE---~~ I LL-·cHANGE·-'TH I s,--.. IF·-:NECES8ARY-r0.:.__HAVE-=:.

;LENGTH OF THE FIRST BLOCK I~ I T:S LNG TH FI ELD, FoR THE USE OF 'THE FREE PROGRAM, ··. ·---·· . ' - ... ~ -. 207

·-------- · --·--x·lo--- LO" · )(12 'DDRESS-QP-POOL~-SEGTNNTNt:i X 10 MEM X9 tRE WE- TAK I_NG STORAGE FR~M THE IR JC~ NOCRE~ jF NOT; .GO TO NOCR~C . .

· - ________ ......... --·-.. -·····-·-- --'LOCN ·---·-·xF _______ ........... ··x8+c 37777- ----·-·· ..... _________ i:-XTRACT LOCATION oF··acocK·-------.. SUB . 1 . . . ~O BACR ON~ TO INCLUDE HfADER ~

LOC~ RF X8"1'C.37777 REPLACE IN X8 215 -· ... ·-r--· ----------·-----x i--- ·-- LD·---· X 6+ I· ---T NCREASE"""[NGTH-B y·---i------

L NG TH RF X8+c37777 fN SOM; Mop X8 BY ··1 .1 · · X8 -:- . .srq XI 2 uP(?ATE WOR~ 23 .

.... ,_. ___ .,_,,., ... --- ...... , .... : .. --............. _..- ......... __ ................ ·---- .......................................................... ·-----.. - .... -.............. · .. _ .. _ .. ,,_._,.._ .. -~--.. ---·.22 i---·----- . . ;NOW PRODUCE A NEW 'AVAILABLE :STORAGE HEADERP AND HIDE IT IN THE LAST WORD OF TH

. ·c-'\ l!HE B~OfK .IS qNE L.O~GER THAN THE .eROGRM1MER 'THINKS, SO HE N~VER NOTICES-THI~ A :---.. t-------··-------·-"·---,-..,. ................ _________________ , ______ " -. -·--. ------- 224

· . / NOCREC ·. X!O LD X7 · · . . · 225 . .. . . Xl .LD Xl2+1 226 .

··-,----·-------·--:--::-:-·x r·-- ""MEM----------,.--·x I o---------·-·---· .. ----------,---· .. ---~tE ·r F,""'THE""NEW-'BLOCK--rs--:-AT-THE---

' 1.zE J 1 iF so, SET u~ TO UPDATE ~ORD 2~ . ·· ... · .. · X l · OATA . 1 . " s IGNAL ·ro NOT UPO.A.TE. _ ·•·

· ·--.., .. ·-----'---'--.. -, .. x9·---·--·-1·10D-----x 6+-r------·-.-----·oo-THE----RES r-op·--srORA-G~:::i-0-AS-N ' .. . M - - . - .....

I fHE ~EW, BLOCK 233 X!O: CPY X9 sAVE IN XtO 234 .

· ... -··"------·· ...... _ ... .:.. ...... ~··-- .. -·"··x9···· -.. -- ..... MOo---·-·--------·--·r-----· .. ····----·----.. -------------···---'>< 10· POINTS .. To· ··THE--LAST-W9RD-Or.

I x9 TO THE FIRST WORD OF WHAT*S: ·· X9 STO X 10 .· . sTORE f N P~OPER PLACC:: · .. .

..... ' --- .---··--·-·---··.-- ' TEST ·o-·--------. _.;.. ________ .... ,o·-wORDs-·-2s-AN0·-·24--,A"GREE ..... -· ---.:1·.I, D . .. . . .NZ J I 2~1 XlO STO X15~24 iF SO, UPDATE WORD 24 ,

........ ·----·-- -·-----~~~----,---··xro---------·sro .. ·------'·-x7 ...................... _. __ ............. _, ___ ... A LSOi '"UPDA TE_:_WORD''''28-------~-----~·-'

X l O · CPY X4 ·244 . Xl. DATA O 2~5

................. - .. . --- -_ .. _:_ .. .. IO , .. ·:-·--· ... RF -·-··--- ·--·-·-·x t O ~c 37771·-·--··----·-----·-·11 AK E'-INIT r Ac-·r N DE x--zE Ro- -~OR -IHI 1

• X4 REX Xl . _. LOAD X! .WIIH'R~TUR~ PARA~ETE~ .. ··, I , 'Xl O REX X4 · ... · - pUT ·O IN X 1 o, UPDATED .A DURESS l ,-----. ··z~Ro·-------::-·:-:--·x·1·0------sro-·--·--·-x4----------------.. -·-·-·-~:--·-----·-.. ··ERo·-our-rHE---TAKE:N-scocK----· ' - - ' ' ' ,' 7 .. .. ' ' . '

. X~ JNL ZERO 252 I . .· . . ·253 ____ _ 1-~.:l)-· ;7~ESIO~E''"rHE"'" R~c;fS'rE~·s-;(Nb ___ RET9Rtf :~~~

[ \,,_ T~RU X 14 LD . XO 256 I .............................. X ! 3 .. -- .. LD ·--.. - ............ XO----·-------· .. --------· ...... ·------ _ .. _ .. _______________ 257 .

·xit LD XO 260 X5. ~D XO 261

.......... --·------·---·----

~-~.­. I '. ' I . ... __ ___,

08/2~·/69 t 6, 53 X3 - LD X2 LD X l 2 -· ... - L..D ..

:< () XO )(0

PAGE -4 262 263 ----· ----- --- ...... -·-·····--· --- ---- ···,--···-----·--- ---------------------------··2 6 4·--·

XlO LD XO 265 X9 L..D XO · 266 X8 ------ LD ------- - - XO ________ . · .. ·_ . . . 267

X7 LD XO 270 X6 LD XO 271

:···-------·------------------------- ·x4·-------- LD XO --- ----- .. · . . . ~-272

. RET I 273 274

- - - /IF ROUTINE · 1 s. PASSED A cONT,~OL ELEMENT :,-A DUMMY ____ ADDRESS rs·-coNSTR0cTED-FROM-f1 l!H Is· f Af_I L ITY ALLOWS PRQGRA'1S ·ro ~E FREEDo - - -- 27 6 - . . .

277 · --------pSEUDOF-·-·x4 --·--cpy---------x 1-------------------------------------------- ----300- ------

- - - XIO DATA O 301 LOCN XF X4· 302

---- ------- ·-- ----- --- ·· - -----··· -LocN····--RF --------- -------------x 1·0 --------------------------.-~------------------------303-----------, . X l . . DA "i A I · 304 ·I

!TAG RF XIO 305 -- .. ------------------------- ------- ----x i' ... - ··-·---··-·-c Py- --------------------- X ·1 0 -------------- --- - ----------------- --------- - ----- 3 0 6

X l . TAG 2 307 310 -------····1E~E~-1~ourrN~ ·· · --- --- ··- ·--------- ·· --------------------------------------------------311 · -------

312 I

/!HI§ P.ART OE !HE PRqGRAM MUST FIND THE REGION PoINTED INT9 BY 'THE ARGUM~NT IN ··----·--;MARi< TH rs· BLOCK AS UNUSED; ... At'-lD MAKI:: ··r NVALI D ALL ADDRESSEs-ri~-TH I s·-PROcESS-PO-IN

/INTO TH~ FREEQ AREA,_ iHiS HALF OF .THE PROGRAM MAY PER[ORM OTHER .SPECIAL -F.UN~T! /ARE EXPLAINED IN CONTEXT 0 3!6

- · - ···_······ ··· ·· · ·· ·· ·. · · · ··· · -· -31 r · /~TEP. 1 ~"' FIN~ ·rHE DES I GNAT ED R.LOCK TO BE FREED,· 320 /REGISTER USAG~ IN TrlIS PHASE IS.~ . 321

· ;~Z~ :_;.,..-=T,jE ARGQMENT PASSED IN XI- - - -------· ----- ------------------- 322

/X6 . ..:,,.. POINTER To THE END OF STnRAG~ IN USE 323 ;X7 ~· P0INT2R TO TH~ BLOCK OF STO~AGE UNDER cON~IDERATION 32~ /Xg ,.;,.,. Pd INTER To TH::: LAST WoRD OF THE BLOCK 'UNDER CONS I DE RAT ION.a ·T;--E-;-,--ro-THE--/~9 •• WORK ~EGfSTER- .. - - 326 .. -/X l O ,.,.-!> ,foRK REGISTER 327

------;~ 12 -·"' -PorNTEG ·ro·-rHE Fr RsT WORD ·oF"· THE-··sLOCK--uNDER c9Ns r~E~AT roN __ _

F~EE X7 '17 ......

X9 X7 ·v "- ....... . /\0

X4

.CPY Xl5 MOQ ... - ..... 23

L..D X7 i"iOO 1

-- L D '. ----- -- .. . X 7 -

CPY XI

331 ~ROCESS BASE POINTER

-- -- - -- . --- ·-·----·- - ·--- ~ TORAG~ P09L .. PO I i\JTER------.------------

sE T UP X9 ~OR NXTBLK ~SEO S!ORE END POINTER ........ ------··-··--·---····· ...... ·····-·. ····- ......... --------------------. 3 3 6 -----_----------------------------

337 340 .. _

·· ;t3EGIN THE SEARCH 11ERE. - AT 'THIS POP.Ji" X9 ~HLL 'COI\JTAIN A POINTER· TO THE N~XT BLC l§~T .. ~~ A NE\~ §§:T QF X7.11 X8,X'3; AND X l 2~ . . 342

31.}3 ------.~XTBLK·--------·-xr ---------cpy----······--·····)(9 --------- -- -------------"-·pur POINYER··ro-NEXT.BLOCK IN-X7

.. - . X l O L.D X7 HAS END OF. S1"0RA3E BEEN ~EACt:iEC X!O MEM X6 346.

- .GE. JC~ 8AD.:"REE i F SO,- ·x4 DOES NOT PO I NT-'TO AN : ]UMP TO BA~FREE TO PR I NT AN ER~

ND LEAVEo 35! X 8 LD ........ . -·· X9 -----·-·······---·-······-·· pUT .. FI ~Si -~ORD- OF BL·oc,c--_x,1,rxg-···-x I DATA 2 . GIVE x~ MIXED ITAG TO PREVENT T

·---·· I l"_~~-- ___ -~-~------ _ -----·-· ___ J8+c 3?}!! ..... _ _____ _____ _______ _ ___ -----·-··----~----------~~~------------~----- -~---.

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08/2"r/69 16,53 PAGE 5 '. . LNGTH XF X9 ~ET .LENGTH OF NEXT BLOCK

x·1·2-· CPY X8 xt:2 ALSO CONTAINS 'FIRST WO.RD OF L --·-::c,s::,:-···········--··--··---·-·-······-· X8 ····---··- 1100-----------.-----x 1-----------------------···-----------·-NOW ·)<8 ~Po I .'~TS ·To THE LASl--woRo=' :; . Ci . .) X l O CPY X4 · . . . 360 - . -I .. · XlO MEi1 X12 oOES X'+ POI_NT' INTO THIS ~LOCK · i ·-----------·---------·GE·----·-Jcc-----. -FOUt\JD I p--·so,i-TH"I s-·-r·s--'-Ti--lE--Bt:OcK-'-TO-BE-·

X9 CPY X8 sET 'UP X9 FoR NXTBLK . . . , . J NXTBLK · GET JHf NE~T- B_LOCK , : ·-. .. .... ----------· -----------·-· . -·· ·------ -------------------- ···-· -------------·---------··-·-· ------------ .. ------·-·----------------· --·------··-· --------·--·-·3 6 :,-------------; i .. /~HE~K TO SEE THAT TrlE BLOCK rs 'FRgEAsLE, AND IF IT ISN•T, P~INT AN ERRO~ MESS~

I

367 . X7-"NOW~ PO rNTs-ro···rRE-HE-AD.ER-VfOR

~REED - 371 • . !-----·---- F lJ UN D--------p i AG--. XF

/'. - -TEST I jS IT FREEABLE

···-----------·----------------·zE·----------JcC------------·-aADFREE·--·---------------------r p·--Nor·,---ERROR ___ 373 . . . . 374

/~OW U~DATE WO~D 25 q~ THE P~Ocrss SASE, THE NUM~ER OF FREE WO~DS, FOR THIS PHA --------···· I USE o-A S . FOLLOWS~-.----------------------------- 3"76

/~'+ "'~ P9 INTER' 'To THE BEGINNING OF THE STORAGE PnOL 377 r /X6 ~~ POINTER TQ THE END OF STORAGS YN USE 400 i-----------;X7 '°"" POINTER To--THE HEADER WORD OF' THE. BLOCK .. Rn· BE FREEo-----·-··40-1 1

1 1X 12 .... '° ~or NTE~ -To WORD 25 OF' THE ~Roe BASE, ··r~E FREE -CORE c()UNT

403 -. ;-·-------- ··--·-----·-·x 6---cPY XI 5 ~Er-:ap·-x6-ANQ·-x4·-------: 'X6 MOD 23 405 I · x;., CPY X6 406 l---------------····-----------------'X6·· -----------·-MoD···-··--- .. -·-·----1--·----·---··-------------·-·. ·----------------------------------------------------------407· -----·---·-··-

' LNG!~ XF X7 ~ET NU~BER OF WORDS TO BE :RELEA ! h\ X l LD . X I t l 4 l l f----1.'" __ .)·----------·--·----x-12·------cPY -----.-----x6·------------sEr-:up--xr2 AT2·------I X l 2 · :MOO . 1 · . 41 3

· ADO~ X12 ~PDATE THE COR~ COUNT WI!H THE ------·--·--·····----·--··--··----------·-- _________ ,_ ...................... _._ ......... · · ---------.------ .......... -------- .. . 4 I 5

/~OW CHECK TO SEE IF THE BLOCK FREED PRECEDES TH~ FREE STORE ADDRE~SED BX WORD

__________ _!_~~s~~-~! ~---~~-~--- ~-~(~_!-~-~--THE _aL_~~-K-~---~~~?~-~9-~!-~ WORD -~8-!____ - 417 -·420

Xl DATA 2 ~IVE OUTQOF-USE PTAG PTAG RF X7 - - 422

· ------------- --- · --- · ----······-·-·--· ---··-·x 1 2--------·.1..o--·--------------------·x 15~28 ------------------- .-----·-·-····------·------------------.- ·------------·----------------------423 ______________ _

Xi2 LD Xl2 xl'2 !SNOW A WORK REGISTER XlO ·LD X8 ~8 STill POINTS TO THE· L~ST WOR ·--------· ;-----·-------·----·--------. ---·------------------ · ---------------------. -=rn-· 8 t···F REE if·------·-·4 26 ____ . X 1 O MEM . X 12 rs THIS 'TH~ LAST BLOCK IR JCC SKIP jF NOT, GO TO SKIP

----··-----···-··--·----------·---·LNG TH ····-·xF·------------:·-·-- X8 ....... -----········--······-----······-------·,'ET., LENGTH'"' or='· LAST "FREE-BLOCK ____ _ X'l 2- CPY XI . · · . ~A VE. I 1~ .X 12 432 · . LNGTH XF . ~ · X7 · . ~ET -~ENGTH.ADDED TO FREE STORE

-------------·------·----··------·------------·-···· ........ -··-····Aoo--------------·--x r2+·1 .. _______________ · __________ _._. __ ·-·----------------·- 434--- · · ··------- .. ·--· ·· ·

LNGI~ RF X7 . cREATE HEA~ER TO P9 I NT T~ ENLAF .ADD 1 _ - 436 ..

··---------·----------------u,J G TH-:R F------- -x 7 + e. 3 7 7 7 7----------------·r: NL-AR GE---x r· TO .. ·PO I N r· ro·-At.:t-oF-F · Xl -- DATA 2. · . .· - ~IVE FREE HEADER MIXED I1AG - -

IT AG RF. . . . X7 , . - - 4!:, 1 . ... ---------·--·--·------:--·---·-'·--,. .. ··--·-·-·--p·r A~----.RF·---~--. ---·x7+·e37777--:'-·'.--------i;;,-ARK ... NEW-END--PO I'NTER--As--t:"REE-·

(C) . ·x9 .L.D . X6 .. · . iF WOR9.S 2'+ A~D 28 A~REE.~ :CHAN~ ··« · X8 L.D X t 5~28 · 44'4

................. - ............................. ··--x8· ............. MEM·--------------·--·.····-··x9·-- ..... ---------------···---------------··-------- . ........ - - 4.i+5 ·

NZ JCC 1 4~6 .... ________________ _x._J ____ _§_T9_ __ _)(~-- _rJjA~§~QBD __ ?_'+ _ _;__ _____ _

. 08/2~/69 t6a53 PAGE 6 X7 - STO X!5+28 ~PDATE WORQ 28 'TO REELECT 'THE C

45! /~~EPARATION FpR "STEP 2; GARBAGE cqLLECTION 'THOU~GH 'TH~ PROCESS aASE;·-~oRDS 23

( ~;,. /OF THf i:1ROCES§ BASE ARE SAVED.1 SI~C~ 'THE::Y cou~D BE MADE I!'lVALID BY THE :§ARBAG~ "-----'\ /AND A TEST I 8 RUN TO SEE· rF "rhF FI 1~ST BLOCK OF THE POOL IS BE I NG FREED, IF :S0.1

--···--·-·-··· /23 P.D.I.NIER .I.S GI VEN. A PTAG··oF. cP --~ro· SHOW · TH,XT"::·r r · I.s·-·our- OF. USE·,· --~---·--····-=--·456

, SKIP X8 LD X4 sAVE WORD 23 If'.J X8 ·,--~---·-···-·-----------------··x9 ----,·-Lo· -------·--------·x4+~----------------'.-------- --AND ·woRo 2a·-·rN :x9-·

X 1 0 CPY X7 - . . 46 t XlO MEM xa· . JS IT THE FIRST dlOCK

:-------·-···-·------------------.--IR - - .. "JCC ---· .. --- N'OTFIR·-··- -- ········-- --.-·-····'iF" NOr;··Ju0P···ra i-.JOTFlR·---------

x l , i:.iA TA 2 cHANGE PTAG ·464 PJA§ RF X8+e37777. 465 ·----------------·-···-···-·-·-·------- ....... -···----.. - -- ___ .......... ,_ -----·- -------------·· ·-·-·· ..... ,... . ....... _ .. - .. _ ...... ----- ... _ .... ___ ., __ ,, ______ -----------4 6 6 -·-------~--

1 §TE~ 2 -~~ GARSAGE COLLECTION THROUGH THE PROCES~ BASE, EACH WORO OF 'THE PROCEE ;TO §EE ! F IT i S AN ADDRESS PO I 1'JT I 1~G . INTO THE FR~ED AREA 0 ANY FOI.JND ARE :GI VEF~ T

··· --------·--·-· /~~ .. sTqR~D 0 TH~ PROC~SS;;.LQQP --·rPLOOi::) .. ENDS ___ WH~N-'THE .. 'END--OF ___ STACrCi'-lARK-,-~A-:fONT~O( /OF VALUE .ZERO IS FOUNDa ·472

1 1~~G_1:st~8 :u8~ .r.s ........ - . 473 : -----------;x4-··..,,,..;--po r NTER-- ·ra-·-woi=w-·23··-·-- ··-··-- ----------------- ----------· ·-- -'+7 i+-

) ' /~6 -~ ... POINTER.TO CURRENT WORD OF PROCES~ BA§E _ 475 ! /X7 .;, ... POINTER TQ HEADER WORD OF BLOCK TO BE FREi:-D 476 . I·-----------;xa· -...,·;..·· WORo-··23. 'SAV;-D' ···-···;--- ·-----·-·-··-·-------- ... ------·-·-------·-··-------'"'-------------47i- ------

.. ,C:.

I /X9 -o+ WORD 24 SA VE:D . 500 i · /XlO ·~'° WORK REGISTER · 501 , __ ,. _____ / X 1 2 ·-.- ... '<>---CONTENTS· ·or· :t UR REN ;--·w ORD" ·oF·--p RO CE SS . BA SE·--·· -- -----------------·-·s 6 2 -----------1 . . - .. - -

I so3 i ·-{-~\. ~E~~~~. -.... .. :~7 2 ... ~6y ··-·--·-------·---·~ l 5 ____ --~--- ---·--·----·--· -------- -----· t ~ [~·!·.~~ 1 Z_E_ --~~- _·r~o~q~p __ _J _;_9f ____ ~~.9-~ 1 '--···_.. -·· . - NAT .o IR .JCC ENG i F NOT AN ADDRESS, GO 'TO LOOK F 1 1'1§:MT~~T X 1 . . LD X7 ~ I RST ~~ORD O~ f REED SLOC~ ! ... · -- ---·-·· ... ·- ---·-··- --~- ... -------------· X 1' o · .. -·-···- · -C P y--- ________ ...... -... -. X I: 2 ---_ .. ___________ -·-·--·-.. ----·------··· _ ... -- .... _ .............. ____ -. _____ .. __ --·-----· 5 ·1 · O .. ··--·--------------·

! X!O MEM XI 60ES T~E AqDRE~S POJNT LNTO 'THE IR ~cc INC iF NOT.1 GO ON TO NEXT WO~D .

. ·- ··- -·· ·--·--··------,-·-····x l 2 ......... 'TAG ... _ -·---·--.-· 3·· ....... ----·-----·-------------··- ··-·······-r::LSE:, . MAKE··y NVAL iD-·-·-·-----.. ---·-·-

X 12 sro X6 AND :RE:..s,·of~E 51 ll-r~c X6 r•10Q 1 (iET ,f~EXT W~RQ 9F THE PROC BASE i · ------·---... -... · .... ----------------a,·--·--·- .. ---------·-·-·-···-.:; .. -...... ·----------------PLO o P----·· -------·-··---.. ---------Lo Op·----------------·-··-·----- --·--5 ·1 .6 _____ __... ______ , ___ _

E~~ NCT; IR JCC I NC r'F NOT CONTROL-' GE"( NEXT 'WORD . ·x 1 .. DAT A 3 . • - . 520.. · - -~ -! ..... -... --·-.·---'-·----·----···---- HTAG ______ RF _____ ......... )(6 .... ·-----·-·-----------··--··------'-·-GI VE- ·coNTROC. ELEMENT-'NQMERlC"--TA

Xi - ·DATA O 522.. - . TEST X6 . cHECK AGAINST ZERO ········ --· ······-------·-· -zE· ... ·-------Jee·-----··---- sT AKEND --·--·--. -·-----···---·-:··-· IF- so.I'-- LEAVE '"LOOP ----·-·-- --- . ,. _________ _

X l DAT A 1 0 - . . 525 · HT AG .HF X6 ,. c:HANGE TAG SACK TO CONTROL -- ----·······--'"···--·--··x~r~----···:RE>C _____ X!2 ..................... --·-···· - ............... 527······,-·-·"··•··"-·-··-··-·-..

1 JSM CONTROL. .. ~HANGE FROM TAG i ·ro 'TAG '2 FOR · X9 REX . X 1.2+c:37777 · - . 531 ...

,---------.. ------------· .......... _______________ ...... --·---------·-·J .... ·-------------ME MT EST' ...... --·-·-.. --------------------·· .. -·--·-·-····-----------·-·----.... 5 3 2·--·--------·-·---.. -----·-

! STAKEND . X8 S TO X4. . .- . . . RESTORE W08DS 23 AND :28 OF THE . - - - X9 sTO X4+5 . . - - 534 . . -. . .... - ........ _.... .. .. ...... , ..... -._·_ .. X l .... ___ -· ... DAT A--·---·-··...... · 1 O , ......... ______ ._ ........... ----- ..... _ .. --·-· ... _ ........................ _ .. ____ ..................... ____ ...... __ .. ---·· 53 5· ___ .. _______ .......... --------·--·-·-:----

n HTA~ RF X6 MAKE STACK E~D CONTROi.. A~AIN \,'--<' . 537

·· _., /PREPARATION FOR STEP 3 ·-(>-<> GARBAGE ·cOLLECTI ol\l --THROUGH- THE····sr ACf<~---- IN' 'PREP.AR AT I ON /THE-STACK POINTER MUST SE SAVED IN THE PROCESS 9ASE,- IN ADDITION, x1·2 IS GIVEi'<i l!HE sg§JNNING .. OF ~H~ STACK, AND X4 Is FILLED WiiH A '.P$Euo6~~TAC~ PQ[NTE~, LON~

o ••-••••-•••U •o• '·-·-··-·----··--···-···-· ••n••••••o ,.. ___ ----~----~-----·--- -------·•-'s• ----··· -·•••• • .~ - ~----·------.J••~------·- 0 -~ •'-•··---•• -~- -··-·· •-••• • 00 000 *•••• 0000 ..... -- • - O ..I. ----------· ---- •

08/2~·/69 ! 6,.53 l!O !N~LUDE AL~ OF·TH~ REAL STACKm

PAGE 7 51.,1,3 5J.J.4

·7°:~···- '··· ···--·--'·-·-·····- X 1 ···---····DA TA-·-·· ...... ·-· 29 ·. ···-· ........ ;. ... _______ ··--·-----· 'NGTH OF Pt<OC .. BASE· PROPEB _____ _

r~; ADD >< 15~26. ~UMBER OF GLOBAL VAR I ABLES ,,___,, ADD X t 5~27 LENGTH OF §TACK . -

---------------- -·--xi-2---cPY Kl 5-- --550 X 12 1'10l? XI X !'2 NOW PO_I_N!S ·rq 'THE -STACK BEG X4 cPY XO r. GET :READY To SET UP X4

------·-···---------------.. ---~xo----···-----Mv -·--·---·------·x t 5 ····-----------·--r·--------------··sAVE·'-THE--xo··sAVE· AREA...,CONTENTS-. XO STO X15 i . sAVE XO . ·554 ... -

XI LD Xt5+27 i ~TACK LENG!H 555 ---····----------·-·-----·----·-·LNGTH··--"RF -----------x4+c37777-·------------sEr-:up--THE-[ONG ""PSEUDO-;.;.STACK-·

- - . . 557 -/STEP 3 ·~ GARBAGE COLLECTION THROUGH 'THE STAcK 0 EACH WORD OF THE STACK IS CHEC

···-----;Po I NTS- INTO THE ... FoRa I DDEN .. ,A RF A, - IF- -sucw--K WORD ··f s-FOUND;p--r-r·=-r-s·--r1ADE'--INVACI Di--T lf§Lqo~ ) .. ENC'§ ~HEN ,-~E STACK BEGIN[~Ii'JG. IS REAC!jEoo .. .. 562 . -/NOTE THAT THIS LOOP ALSO SERVES TO 3ARBAGE COLL~CT 'THROUGH THE REGISTERS, SINC

-------- /~EG~_S!E~s-eu-r= Xo.,x1 ·r·AN0·-x I 5 .. ( "''HiC!--l''-rN-CONT2xT-'i.RE-,Nof-NEEDED.:-1_ARt"-SAVEQ-oN~~ I AND ARE RESTOf<ED FROM THERE ON :EX 1 T, . i · 565 /REGISTER USAG~ IN T~IS PHASE rs.~ ! 566

-----·-·1Xir ·..:,.,._-psEUDO-ST ACK PO l NTER ·········· ........... ----· -----------------------------·-·-----···--------------- 56 7-------------/~7 •• POINTER-to HEADER WORD OF FREED BLOCK 570 /X!·O ~0 WORK REGISTER . - . 1 57!

--~--------·---·-;x r2-· ... --Po IN TER--ro-··s T ACK-s,..G I NNTNG-- 5 72 _____ _ . .. - . - - ~ .

573 S~OOP X4 MOD I ~OVE I DOWN PSEUDO-STACK

, ......... , ______ .... :. : ..... .:. ... ..:: __ --------:XO ...... ·--·-·· C Py---·--·----·--• -X 4-- ·---·--------- --------------·--- ·'-----~AKE PSEUDO;;. ST ACK" "RE A L--·srA CK---

· x 9 LD . XO ~NSTACK :CURRENT ~LtMENT -, /~~ - AT JC~ CHA T F ADD~Ess, ~H~CK 'FUr<THE~ .AT CH :··-"._ _ _/ . R~sr-·-···------·x9·-·------ sro-------··-xo- --------: ---RESTAC~---x9:,----poss I BLv-cHA!~GED--T9 ' X l O CPY X 12 . 601 . . , · X10 MEi"l X4 'HAS :STACK i:3EGINNIN(i BEEN RE:ACHE ! -·----·------________ :_·-'---···-,· N z·· ---------Jc c- -~------'""--· s Loo P ---------- _____________ _:_ __ IF-····. Nor, - . RE c. o op-·----··---------- · · - --·--

. . J - RSTAK . . iF SO, RESTORE THE.STACK AND CO • CljA AT ~cc I .. . - - 605 - .. : ...................... _____ , _________________ !-' ..... _________ JSM--------·-coN'f:ROl ___ · ----------cHANGE-·ra·-rAG2 ______ _ · . X l LD .... · X7.. . .. . -- - .. 607 · . X l O . CPY . . X9 610

..................... ··--·---·-----~---:..._,x 1.0--- ..... MEM--·------------·x 1 ······· -------------------·-----------------· .... -oEs····r r -:po I Nr---1 Nro···FREED'-AREA--f) . .. . .

' ·.. · - . IF< . . JCC -~EST . rF NOT, GO ON TO NEXT ELEMENT . X9 TA~ 3 fF Sci, MAK~ IT .. iNVALID: -· -.............. - ......... · ................. ______ · .................... _. ___ J·-------REsr-. --------- ONT I NUE-----------61 ·4-·--·· ·

. ' ' c R~TAK XO LD Xt5. . RESTORE THE STACK 'FROM THE PROC

XIS MV XO ~ESTOR~ TH~ ~O SAVt AREA-FROM! ---------------· .... . · ........... :.... . ................. ·.· ................. · .... ,........ -·-·· ............................. 617 .............................. - ............ ..

/~~EeA~AJr-ON F9R STEP'+.~· GARBAGE COLLECTION TH~OUGH MEMOgYo SET UP 'X6 ·ro POI~ /~TORAGE IN USE SY. TH IS PROCESS, X4 TO PO I NT. :TO rHE BEGINNING OF SUCH STORAGE, '. ....... -., .... _, ............................. "'"'. ............. , ... ···-· .... --------···· -.. -·---------·--·-·· ..................... ________ ........... ___________________________ ·------· . . . . 6 2 2·--. ·-·-- . . . --

X 6 CPY X15 623· . , X6 ,MOD 23 6211-

-- · - · . ----·· · - .· -r'+·---L.o-·--.. -------.x·6·------------.---------.. -------·----------·-------- - 62s··---- - -

X6 MOD 1 626 X6 LD X6 6~7 .......... -···-···-·-··--· ....... -,.. . .............................. ····--··----···-·-·· .. ----------------------·-----·----------·--- .. -------·--··-----------------------·---63·0-------------!

<O ;STEP ly ~ .. GARi:lP..GE COLLECT r ON THROUGr-1 ·rHE PROcEs8 STORAGE PooL~ iH Is PHASE cHEG ~ 1eRo;E~S STORAGE POO~ TO SEE -~IHPTljE~ IT ! S IN USi:- AND. M IXEQ, If IT IS BO!H U§EC

.· .... /MAY CONTAIN F0RBIODEN ADDRESSES~---A\J-INNER-MEMORv-LOOP-TMLOOP)·. SCANS 'THESE-BLOC /I.NVAL):D ALL. S~CH ADDRESSES, AT "TH~ END OF SUCH A BLOCK, A--R~TU~N IS MAD~ TO Ti·

. ··- ..... ~l BL8~~ i s_~~~-~~-NG ALL THE sLoCKS r i\l THE STORA!3E pOOLA WHEN THE .LAST OF n_:!ESE BL

08/24/69 16,53 PAGE 10 /THE REGISTfRS-ARE RESTORED AND A RET EXECUTED~ 636 /REGISTE~ USAGE FOR tHIS PHASF IS As FOL~ows;.. 637 /X'-1, ~ ... -POINTER-TO THE BLOC!( ·uNDFR CIJi~SIDERATloN·····--·-·····-·-·-····--·-···-·--···-· 6l~O-------------·--··-

(\ /X6 ..;, ... Pd INTER To THE LAST BLOCI< I~~ USE . 6~ I ~ /~7 •"" P9INTER .!O THE HEADER WOPD pF F~EED BLOCK 6~2

- -------· /X8 -.,, ... WORK REC:i 1 STER ··· ····· - · · - . - ... · ---·-·---···--·-·:··-------·--····-------·61y3·---------·

1~9 •• WqRD ~E~NG CONSIDERED F9R INVALIDATION 644 IX! 0 , ... <> WORI< REG I STER . : 61.:,5

···-------1X12 · ...... --po INTER: 'iO Ei'·m-·oF'· BLOCK· ·BE I 'lG - SCANNED:o···-r- "E· ;··-'ro "THE- HF.:ADER--woRo-···ro.R-TH8 , , . - - , , . - I O . • , -· • •

647 a~ooe LNG TH XF X4+e37777 ; pu1· BLOCK LENGTH,:;;·! IN XI ······ ... ····-·-·- .. x·12- CPY. -·-··- . ·-·· X4 .· ... . -·-·-····-···· .... .. . .... . ·-'-··· -···. 651 ... '~---·-·'·-·---------

X 12 MOD >< 1 ~4 Now· Po I Nrs ·ro 'THE LAST WORD I ITA~ .XF X4+e37777. ! ~HECK FOR MI~EQ TAG - .

-------------··,EsT--·---·2··-· · ·-·--·-··· ----.-··-···----·-----------· -· .... ·-··-.. ------------·-·····6·54·----------

NZ JCC GOON I iF NOT MI x~o, NO NEED TO :SCAN .I PTA~ xF X'+-'.·e37777 : iF MIXED; §EE IF IN USE .. _ .. _________ ..... ········ ·-- ............... - .. ---·- ... .. .. -..... ··-····-TEST--· ·-.. ·······-· -·2 ................ ··-·····-····r····-··-·-·-·-·-··--·-.. ·····- ........... ·-····- . ---·-··-··-·---·-6 o 7----·-----·--

Z E .JCC GOON . fF NOT, GO ON 660 . MLOOP X4t i"iOD 1 . sTEP 1 DOWN BLOCK ..... - ... - .... :..:.:..:. __ ·:. ________ x 1 ·0-·---cp y-------. x 1 · 2 ----------- - ______ .. ___ ... · ·---··· .. --.. --·----··------...:..----·---~: 6 6 2· .. __________ _

XlO MEM X4 ~AS END OF BLOCK BEEN 'REACHED ZE JCC GOON · · iF YES; GO ON TO NEXT BLOCK .

-·-----··- -----·-·-~---·-·--··· x 9 ········ · · -····Lo .. -----·- ···-·· ·--:--x 4 ··· · · ··· ···· --.. ·-·:·T···· ·-----------·F r L c x 9 · ··-- ----- · · -·-·· ·6 6 s·· -- ----·- ···------1

. NTg~R ~Cf MLOOP iF NOT TAG I OR TAQ 2, GfT NEXT . . AT JCC 1 . . . 66 7

-- . -----------·-··· .. ---··-.. , -... --····--JS M ··-·---·-.. --... -... CONTROL-·--·--· .. ···---.. ---· ·······--····-··-.. ··-·--·-·---·-·--·---·-··6 7 o . XlO CPY X9 .. 671

r-. · X8 L..D .. X7 . . BEGINNING OF FREED BLOCK ··-(. ~-.. --······----······· ·------ .. X l O ....... - MEM ...... ·-·--·- ·x8 . ----··-···-········-····---------··-···DoES .. Ir·· POI NT··· f NTO-·FREECf--8.°COCK--

_ _.;1 · I~ JCC MLODP IF NOT11 KE~P ON · ··. X9. TAG 3 iF YES, THEN MAKE INVALID

·--.--·----·- .------ . - .. ·x9.- - ........... sTo·--------- .. X"- .. ·--·-·------·--········---·------··-···puf 8'ACK ___ I"1~---MEMORY·--···---------

j ,'1LOOp i 'OOP 6 77 G~ON . Xl DATA . 2 ~IVE Xl2 MIXED !TAG TO PREVENT

········ .... , ......... ,., ... -·-·-'-···-, :··:··· IT A G ........ RF ....... --··- ··-· X 12+c 377 77·-·-··-··· ···-·---·-···.. .. ·-· - - ........ ·---·---~-- . 7 0 1 ··---·------·-·· -·-

. . X4 - L.D X 12 . • LOAD ·x~ WI TH HEADER OF N~XT BLO. "><10. CPY X4 . - 703 "J

·----·-··-------· ---- --- : -·-->q.o- ----,'1 EM----· ·----··----·x 6 .. ····-· ·-···---·----·----- ·-----· ·-···-·- ··-f s ··-r T ·-:-1.:As T- ··s LOCK ... · · 1 VF~ . JC~ THRU r F SO.;, LEAVE PROGRAM

~ SLOOP ~LSE, CONTINUE LOOP · ......... , .. _......... ..... . ................................................... · .. ···-· .... . ........ ····- ........ ·- ..... - .......... -.......... - .. --............. , ........... "701"·----- · --·----··-.. ·-··-

/~ODA~· CODING ·ro PRINT.ERROR MESSAGE ,~10) FOR INVALID FREE 710' - .. - ... . . .. - - 711

· ·-,··-- ·BAQFRE~-- ···.····· Xl .. · · ·- ···DAT A··-··----···: t O ·· ···· · · ···-- · ······ -"- - ·· ····- ······----·-------- ···------·-71 2--·-. - · -------·-·-··-

TOM c 224 71 3 ,· TOM c?3 714 ........ ·- ---.. -·-· ....................... _,, ..... -..... ---' ·-·· . . . .. . .................... . . .. ... .. ............... ..... .... . ............... ... ....... ............... 7 l 5 . '

/CONTROL rs A suaROUT I NE TO TRAi'lSFO~M 'TAG I 'WORDS INTO ADDRESSE§ so THAT THEY MA /ADDRESSES~ THE ARGUMENT IS PASSED .. AND RETURNED iN X9a . . - 7 t 7 , - · .. ~ ···---' ·--··-·-·· ...... . __ .:· ..... - ._· ---- -·-·-····"· ·-··--·-----··--··- ....... ·._-_____ _,_,, ____ ------ · ... -- -··-·-----····---·---·-·· 7 20 ________ _

CONTROL ... Xl DATA 2 721 .. - .. . . !TAG RF X9 722

·--------........ . .................... '.: ... X9 - ,.,. ............ ·r AG···.... ·'··-··· ....... 2 ................... ·-··· ···-... --............... _ ...... -·~-····-····-----.-·--·--··-.. ---------~-7 2 3 .. ---·-·----·------ -··--·

,C) . .. RET 1 . 724 \ ... .,.../ 725

/THE END, · STORE "AT c 202g···A[ I AS"'"!:3o···oEcI MAC~-----····-·--····--· .. ·-······-,---·--·-·-. --,--- -·726 ______ _ - .., ... . . ..._.,. . . ·. . . . . 727

<C202 .·730 - - • •- - .· ----- -· - -- -----·-- ·---·----- ·•--M--• ____ __. ____ ,.,__........, __ ----·-~-,-·--~--- -~- ---···--.... - ·---· -----·------·-----#- ---·-------------~---

08/21+/69 17, 24. PAG~ 1 2

---~:;-:-··/PROC. c203 ·sET UP ·pROCESS BASE.11 PUT PROC NAME·--··-----------------------····:3

C~· 19~ SY§T~M SYMBOL TA:3LE, Po I:\JTER I~ PBASE.11 .. 4 .. /~WNER NO, ON DEvc TABLE, TAKE CORE SPACE,PUT 5

-··.--'---··---;r-ARAMS-ANo·--po INTERS\ ON-PROCESS··· BASE· : . .. 6------I - - .. - 7·

1§0 TO TLU TO CHECK FOR PROCESS NAME 10 --'-------- /D UP I.,; I CAT ION:· A ND .. F UL[-· SYMBOL- TAR LE.:________________ -----····-------------r r

- . . - - X3 .. L..DA t 53 . . pROC NAME ~RqM .Ci"L I ST . . Xl LD X3+1 13

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1 SYS 148 16 ···-·. -.. -----· -- LLS·-----·.-5lf·------····--------·· ·1 7--

TEST 1 20 NZ J ERR!6 21

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5·~-~-----~ 5+ c 377 7T----------;GET-'EXPON~NT--~?-- ·-----.1

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, . . X8 LDA 1B2 ;OINTER•COMMAND VT I XB t..D XR ~ET eo~NTE~ ro~LIST :---~---. ----···--·-·-"-.:..c... .. ___ X8-·--:-L.D ___________ )<8"" ---··---------··--··--·-··-------oF ·PROc-:co~MANDS"-IN--xg

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. X9 LD X9+1 . ~5 XS JNL LOOK ~6

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/!'!AME {9UND 9N VALID PA RAM LI ST, X9= INDEX OF 'PAR AM ·51. --NAME . -- ---·-----·-cLA------x9 ···---- . - · -- : . -----··· 52---------

. "TEST 3 . [_:Q()K F9R :31 4 ! STACK.o GV l ZE .JCC STAK 54

: ------------------·------···-· · ···-··-···--· ·TES r- . ··------····· 4. . .......... -·--····-· · ............. ·-······-----·-···--·-·-----------·-··-·--·---··-··--· o5 ___ · .------

Z E J GV AR · 56 ,. , . "TE§T . 2 . . · 57 ....... ·--·----···--- -···· ·····---· ····z ~ ·--·-····---·:·J-- ., ... ---··--·--"--sENS ·-. ----···--··--·--·----------- 60 ____ _

I 'TEST l .-, 61 , ZE J . TIMF . 62 ·--· · ----------·uf'J___ .J ·---.-·---CORE······-···-·-···--·--·-····-----------··---------------·-6·3·

64 . . /INDEX -4--GVAR-- GO TO SUBRT ·ro :CHECK NEXT TWO W6RDS FOR ::VALUEa RET WITH

:--.--:--·-··;VA LUE··· I N··· X 5· ·,--··THEN COMP AR E"-R E Q rJE ST E"J-"VAL.::uE·~·r o--M. X-0 '.ALCO WED""'F OR --G V ,..._ __ 1 ((-) GXAR . . .. . 1 JSM . CHK - · ·.~ A . . . . 67

"'-' Xl LO . Xl-1-4 70 ···--· .. . ...... ..... .... .... . . . .. .. . . ·-······ ··-· . .. .. .. .. TE ST ..... ·--· .......... "">< 5 ... ··. --·- ... ···~·-···· ·-· ... ···- -·········· -- .... ---·--·- ····· ··- ..... -· ...... -·--- ... ---········- .... ·---··7 f ·--··-··----·-···---·

LT J ERR IA· . REQUEST ·roo BIG Xli+ CPY X5. . . . .. . 73

••• ·•----•••---••••-------------·H·---- • ----- ·-· ---------·-----·--------·

08/24/69 17,24 PAGE .2 Xl DATA c:36 74

AND~ X7 1 ;REMOVE GV BIT FROM L'N 'J - i\JFXT .. !" 'tPARAM- STATUS INDICATOR·-----··

~; 77 L1 I INDEX 3""- STACK SIZE REQUESr-GO TO SUB RT TO cHEcK NEXT :2 WORDS IN CT.LI ST FOR -·-··-·-· .. /RET-: WI TH ·v ,A.LUE .. IN X5. 'COMPA~E REQLlEST. ro·· MAx-·v A"UE ---- ·'--------------·-'-·-= IO 1 -----------~---·-·

- . ·- - . ' . L . SIAK · I JSM CH.K I I 02

X 1 · LD XI +:3 . I 03 ... ··-·-...... --- ··-------- ·--·-·--· -- _________ .. ,TES T ..... -. ----.---- X 5 ... _. ............... -· · -,--------- ------------.--·-- ...... ---·-·-----------------10 4-

L T J ERR Pt REQUEST ·roo BIG Xl3 CPY X5 .. .. . . 106

- --··---· ------- ---------·x1 ...... DATA -- ... c:35···-·····----:- --·-·----··----····· ... ·- ........ ····- 107·-------------·---

. AND~ X7 . jREMOV~ STAK BIT FROM UN J NEXT . ;PAR AM STA !US .I:ND I CA TOR ---------------------.. ·-··-----------·--··--·-.---...... ______________________________ -------n 2---

l!No~x 2~-SENS~ BITS--CHECK FOR ::VALUE IN SU~RT ~HKQ R~T 'W~TH VALUE IN X5 SENS 1 JSM CHK 114 ···-- · ------. - ....................... _ ........ "><' 12 ................ CPY ..... _ ... _ ............ X5 ........ ____ .. __ ,. __ 1···-·--.......... _. ___ ,. ______ ........... - .. ·-----··----------,-rrs

X 1 DAT A c 33 116 . · . . ANQ~ X7 . . jREMqV~ SENSE BIT FROM

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1 21 /INDEX 1--TIME·~CHECK FOR :VALUF IN SUBRT, :CHECK AGAINST MAX ALLOWED

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. XI L.D . · X t ,i. I 1 24 TEST XS 125

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X 11 CPY X5 127

-------- --

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133 ·-;---·-----,:1:ND~x·-·a;;.·;;coRE-··sp-ACE;;;.·.;;.Go-Ta···cHK-·FoR-.·:f .. VACOE~---c::HEcK--A-G),).NST--ffAX-ACCO-wE:tf

CORE 1 1 . JSM CHK . . 135 . .. 'X 1 .LD . . . XI . 136

I

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LT. J EPR I·'+ REQU~ST 'TOD BIG . XlO .CPY X5 lL:-1

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152 ........ --··--;GET . DEFAULT. VALUES FOR .. PAR.A,METF:':RS ·Nof .. ENTERED 'WfTH :COMMAND .. --· .. 153 ...... --,--·--··-----·----... ·

-:- . . - .. .·. XI CPY "'1..7 . .. . . - · 154 . .. . . AND c37 . 155

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X9 LD . X9 160 ~ · ........ ········-· -··-- ·:- ... ·--~---x~r ' -:Lo ..................... X9+ i---·-···-·-··-.. ·--------~----·--.. ·-··a INTER'·ra··oEFAUL T .... VECTOR;·---··--·--:

p - .. . -'TEST, c 20 162

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. AND . c 1 7 · · . 1 65 166

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08/241-/69 17· 24 TEST

LT J ----· - .... ·---- --------x l 1 ----- LD

AND

c:10 2· x9-:-1 · ·· c7

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, 200 TEST 2 '201 ··-·:·--------------------------L. r------ s··-----2-· ------. 202 _____ _

Xl3 LD X9·1"~ i_'OAD STACK SIZE AND I .. · 204

---------·------------------------------- ------------------------ . -------------------------------~20 s·---------

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212 - -------/REQ~E"§T-CORE-~PACE FROM STFX .. FOR ~SERS .. POOL ______ .... - . ----·-··---·----------- ·2 i 3-------------------1

G9T X9 DATA O . 214 I Xl CPY .Xl4 GLOBAL VARS AND SYMBOL I

--·-----------···----------------·----------,.,py-----,2. ------------;:.A.BLE···SAME. L:ENGTH,---ADD- . . . ADD X!O · EORE R~QUEST AND STACK REQ I

. ADD X 13+30 , ~30 FIXED ~O~N§ FOR TOTA~ -~ORE 1

1

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XI - DATA 2 . ' 222

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. rO STEX 225 I

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/~ET UP PROC BASE AND ITS HEADERo STQ HEADER 230 I ljN EJ8s! WORD OF CORE ALLOWANCE. - i 231

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ADO X 14 1 · 233 i ADQ X!3 • ~r=PRO~ESS BASE LENGTH .

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LOCI~ RF X9 24'+ ,· XI l.)ATA ? 2u,5 IT A~ -- RF.·--·-··-·-··--·· X9 ··· --·- _. _______ ! __________ ----------------------·-·--------· .-----. -2~,6---.-----. -.

Xi OATA l 247 PTAG RF X9 250

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1§0 TO TLU TO STORE PROC NAME IN ST~B 253 --------· ----- --------------·x 1 ··---- ---.-----.L.o-- --------. ---·--·-·-·x3+ r·--· - ------··-------------------------------·-c2s1+·-

(', l..DK O . 255 .-"~~,,· 1 SYS • t 48 256

·x4 - .. CPY .... XI .. --·-·· ·--· --- ...... ··------------------·- 257. -------------------

U\JGIH XF X9+c37777 sET 'UP X9 ~O~ c'BASE POINTER SUo 261

08/24/69 17024 U~GTH RF X7 LDA X7 . . ... MOD

X9 STD ,•., ... \

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X9+C37777 135

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.lj. 262 263 -· -···· .... --- .. -· ----·----- -·------------- 2 6 4-------------------

X7 · 265 (___,) '266

~.- ·;STORE '~PARAMS IN PROCEss·-·s·ASE (POINTED ·,ro·-· sv-·-x9·r-·-··- .. ·-···-----·-·--·--·; ___________________ 26 7---------. -- XlO STD X9+18 - . EORE ALLOWANCE

Xii STD X9"1-l9 rlME . 271 ·· -------------·-------------- -·x 1z-----·· sro- ·---------·--x9+ 16 -- - -·----- --------- ----·-sENSE- a rrs·----- ·· 272

Xl~ STO X9+86 GLOBAL.VAR SPACE Xl3 srq X9~?7 ~TACK LENGTH- -274 - - - . - ·xi I - . LD .. X3+ l - -- -- . --- - .... - ·- 275 _________________ _

x11 srq X9+?2 jD FRO~ CT~I~T ·277

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. Xl DATA 30 . · . .. 304

·········-------------·------·--x-r i---------·~~~·--------------Ql'·~~-_L ____________________ x 11-;PolNTS 'TO E~g5 OF sr A-9< . I

X l DAT A -o . . .. 307 1

Xi STO . X l 1 310 ·, l -· --.----DATA-- ------~----·e 12 ---------:-----------------------:-TAff~CouE--FOR ___ TAG l----------:

HTA~ RF- XI! .... - . '312 X l I MOD X 13-:2 '31 3

---------------------------·x 12··------cpy-- _------·--x 1·r···-------·-------------rN SY ACK_. _____ 3f4 Xl OATA O . - '315

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Xl2 STO X9+!7

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334 ·335

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337 . 3.IJ,O

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353 3 4

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08/2~/69 17, 24 PAG~ 5 /STORE POINTER.TO cORE AND F~(['STO~E IN PBASE 355 /TACTUAllY POINTS TO FREE sTORE HE~DER, NOT WOR~ FOLLOWING) 356

• - 1. " - .• • . X l l .... STO .. . .. )(9+?lr .. - .. -- - ....................... _____________ 3::::>7 .

( '~" X l 1 . STO X9+~8 360 - LNGTH XF x11+c37777 361

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364 ------·-----·-;SjORE··OWNER · NO; (Xi+) .. IN DEyC·rARLE,--oEv ICE _______________________________ 365 _________ _ /~Oa ) ~ 9TLST -r 1.53),... FIRST E;\JTRY . 366

Xi LD X3 367 ---·--·-·--------·-----·------~----- .... ·-----i UR ___ . --·---1 ?.----------· --------------3 7 O ·--

X 5 LDA \37 ~5 POINTER TO OEVC X5 MOD XI rABLE.11. ENTRY . INDEXED

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/SUBRT CHK--LODKs AT NEXT TWO WORDS ON PARAM LISf (CTLIST--!53) AFTER FINDING .... ---·-·-/A PARAMETER" WORo-··1 NDEXi-FI Rsr·-woRD·-·:1usr--sE-:=· -s r·c;N ('EXP'-'2,-MANr··-1T,-NExr-WORD-=--

/MUST BE-VALUE··~EQUESTED !EXP Z~RO), LOAD XI 'WIT~ POINTER TO .. MAX VALUE T~8LE /AND. X5 WITH VALUE REQUESTED FOR' RE. TURN TO CALL I r~G LOCN 400

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08/2~/69 PAG§: ,6 450

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. X8 DOT X t 3 ciET NEXT HqLE 214 .

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/Xi 2 -,.-:. I t\JD I CA TE:s WHETHER Ai'Jy BLOO( HAS NON~ZERO D ISPl.ACEMEt--!r.. 25 1X13 •• INDEX QF CUR~ENT HOLE· IN X5 260 /~14 •d NEXT AVAILABLE LOCATION 261

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X6 DATA O ~O LASTEX 265 Xl2 oAtA O ~o NONZERO DISPLACEMENT YET

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08/2~/69 16,58 PAGE 5 E~DMARK LNG!H XF X7 ~ET NEXT B~O~K

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08/2~/69 !6,·5~ PAGE 6 E~MEM Xl2- CPY X10 ~UT WORD TO BE CHECKED IN .Xt2

X6 CPY X? iNITIACizE°"x6 45! ---·--.--·--··- --·· ---·-------·····x 13 ···---·cPY · ····--·· --- .. · X4 · .. ,.,,_,, ____________ ..... _____ ,, ____ ,, __ , ___ iN I Tt AL: I ZE X 13 ·-· ---·---------

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Z~ JCC MEMEND vESa LOOP 456 .·x10 LD X6 . .. 457

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Io XF X6 ~IND oiSPLACEMENT OF THIS BLOC~ --------------------------rEsr·-- a···_ .... ___ -- · ·-.. ------~· ----------463 ______ - ----NZ ..JCC - 1'1EMEND T F ST ACK I~ NOT INVOLVED., .LOOP

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-. . X!O- CPY XI . . .. 473 · •1

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08/2L~/69 ! ~· 58 J NF)(TWORD.

. PAGE 7 ~ET NEXT W~RQ 5~3

51{.4 /LEVEL 3 ""'""' PHASE 4 . 5ll,,5-- . ----------- ········

~, ;THIS PHASE PHYSICALLY MOVES T~E STORAGE BLOgK§ ~O 'FILL UP THE GAPS, REGJ~TER 1\___./ /X2 AND. X3 ... ..,, As USUAL 5•+ 7.

;Xi+ 9,<. 'NUMBER OF STACKED D fSPLACEMENTs., .. LATER A WORK' Ri::G I STER'""55o··-·-------------//X5 .,, ... THE PsC:Ooo-sTACK - . . -55 ! . /X6 ..,, ... TRE PLAEE FOR THE NEXT HFADER WORD 552

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