iAPX 286 Operating System Writers Guide 1983

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iAPX286MAeRJ~ASSE~BlfKLoeOBJ~nter Protec'hCl Mod.'60-516 dateLINESJUnEPAG" 3l....0I0>~ob:1I0002 00000004 000005 000006 00000008 0000OOOA 0000oooe 000000 00OOOE 00000010 00000012 00000014 000015 000016 00000018 0000OOlA 0000ODIC 000010 00~Ole. 00000020 3FOO0022 00000024 000025 9Z0026 00000028 3FOOOOZA 0000ooze 000020 81002E 00000030 (86697988990H92939495 +196979899100101102103104105GJT_DESe DESC ·C"scriptor for EPRO>l .. OTlOT_DEse DESC Descriptor for EPROM lOTr:"P_OESC OESt Temporary descript~rDefine a descriptor which points the GDT"at location O.This descriPtor ii also loaded into S5 to define th~ initialprotected-mod~stack se~ment.TE"P_ST4CK CESC SEJECTDefina tho TS5 descriptor us.d to allow the task switch to thefirst task to overwrite this region of memory. The TSS overl~ysthe initial GOT and stack at 10cation,0.SAVE_ TSS oesc Define the initial stack space and filler for the end of the TSS.OW 8 OUP (0)Figure 10·1. Initialization Module ENTP (Cont'd.)en--t(5Z
iAPX286 MACRO ASSEMBLEtEnter Protected Mode 960-516 date PAGE4l......o!..~ILOC0040OBJ0000)00400040 00000042 20000000000200040044 20000046 18000048 2800OOU 0000004C004C FA0040 FC004£ 33FF0050 8EOF0052 8ECT_OOS4 8E070056 8UOOO00590059 E90000005C005C 50OOSO 83E05C0060 2£OF015000LINE106107108109110111112113114115116117118119120121122123124125126127128129130 +1131132133134135136137138139140141142143144145146SOURCEEN~_GOT LABEL WORDSTART_POINTER LABEL OWORDOW O_START_TASK Pointer to initial taskTASK_ENTRYTSS_SELT5S_ALIASLOT_ALIASTASK_ENTRYTASK_LISTRESET _STAIITUP:CLICLOXORMOVMOVMOVMOVSEJECTSTUTDefine template for the task definition list.STRUCowOWOWENDSTASK_ENTRYOW01_01OS_OIES_OISS_otoDefine layout of task descriptionSelector for TSSData segment alias for TSSData 5egment alia5 for LOT if anyTerminate listNo interrupts al10.ed'Use autoincrement modePoint ES:OI at phisical address 000000": Set stack at end of reserved area'SP_ENO_GOT-INITIAL_GDTFor~ an ~djustm.nt factor from the real CS base of FFOOOOH to thesegment base address assumed by A5M286. Any data reference mad.1nto CS must add an indexing term raPl -to compensate for the differenceb.twe.n the offset generated by ASM286 and th~ offset required fromthe base of FFOOOO".PIIOCCQLLSTUT1:PI)PSU!ILIaTSTAQT1BPBP_OFfSET STARTlNULL_oeSCCBPJFigure 10-1. Initialization Module ENTP (Cont'd.)The value of IP at run time is notthe same a. used by ASM2S61Get true offset of STARTISubtract ASM296 offset of STARTIl.aving adjustment f.ctor in 8PS.t up null lOT to force shutdo.non any protection error or interrupt~~m.:Z:I• r-...~oz
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LITERATUREIn addition to the produc
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Intel Corporation makes no warranty
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PREFACEExternal LiteratureMany aspe
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Table of ContentsCHAPTER 1PageINTRO
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TABLE OF CONTENTSCHAPTER 9PageVIRTU
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TABLE OF CONTENTSLIST OF FIGURESFig
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Introduction to Protected 1Multitas
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INTRODUCTION TO PROTECTED MULTITASK
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inter INTRODUCTION TO PROTECTED MUL
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111'eI INTRODUCTION TO PROTECTED MU
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Using Hardware2Protection Features
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USING HARDWARE PROTECTION,FEATURESs
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interUSING HARDWARE PROTECTION FEAT
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USING HARDWARE PROTECTION FEATURES(
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USING HARDWARE PROTECTION FEATURES
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USING HARDWARE PROTECTION FEATUREST
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USING HARDWARE PROTECTION FEATURESo
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USING HARDWARE PROTECTION FEATURESL
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USING HARDWARE PROTECTION FEATUREST
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USING HARDWARE PROTECTION FEATURESE
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inl:el~USING HARDWARE PROTECTION FE
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IntelUSING HARDWARE PROTECTION FEAT
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IntelU~ING HARDWARE PROTECTION FEAT
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lSLDTFORMATRt;;SERV~~"O~iA~~.~ijij
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CHAPTER 3REAL MEMORY MANAGEMENTIn d
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REAL MEMORY MANAGEMENTIALLOCATEGATE
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interREAL MEMORY MANAGEMENTBEFOREAF
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REAL MEMORY MANAGEMENTGLOBAL DESCRI
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REAL MEMORY MANAGEMENTTable 3-1. Ac
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REAL MEMORY MANAGEMENTBEFOREI "FREE
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REAL MEMORY MANAGEMENTBEFOREI "FREE
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REAL MEMORY MANAGEMENTPL/M-286 COMP
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IIIIIIIIIIIIIIIIIIIIII
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II I telTASK MANAGEMENTCPUTASK REGI
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TASK MANAGEMENTIf the proc~sser, wh
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TASK MANAGEMENTUsually, termination
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TASK MANAGEMENTTASK XTSS TSS TSS TS
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TASK MANAGEMENTSCHEDULING POLICIEST
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TASK MANAGEMENTThe example in figur
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TASK MANAGEMENTREADY QUEUESBY PRIOR
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IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
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CHAPTER 5DATA SHARING, ALIASING, AN
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DATA SHARING, ALIASING, AND SYNCHRO
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interDATA SHARING, ALIASING, AND SV
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Page 117: DATA SHARING, ALIASING, AND SYNCHRO
Page 121 and 122: CHAPTER 6SIGNALS AND INTERRUPTSInte
Page 123 and 124: interSIGNALS AND INTERRUPTSlOTGOTTS
Page 125 and 126: SIGNALS AND INTERRUPTSTable 6-1. In
Page 127 and 128: SIGNALS AND INTERRUPTSSend interrup
Page 129 and 130: SIGNALS AND INTERRUPTSprocedure suc
Page 131: Handling Exception Conditions 7
Page 134 and 135: HANDLING EXCEPTION CONDITIONSError
Page 136 and 137: HANDLING EXCEPTION CONDITIONSAn exc
Page 138 and 139: HANDLING EXCEPTION CONDITIONSA few
Page 140 and 141: HANDLING EXCEPTION CONDITIONSAn ins
Page 143 and 144: CHAPTER 8INPUT /OUTPUTMany of the c
Page 145 and 146: INPUT /OUTPUTYou can still take adv
Page 147 and 148: INPUT /OUTPUT• Only the operating
Page 149: INPUT /OUTPUTtask the I/0 procedure
Page 153 and 154: CHAPTER 9VIRTUAL MEMORYThe memory l
Page 155 and 156: VIRTUAL MEMORYthose segments that a
Page 157 and 158: VIRTUAL MEMORY• Return the RAM sp
Page 159 and 160: VIRTUAL MEMORYReplacementThe operat
Page 161 and 162: System Initialization10
Page 163 and 164: CHAPTER 10SYSTEM INITIALIZATIONThe
Page 165 and 166: SYSTEM INITIALIZATIONStarting the f
Page 167: iAPX286 "ACRO ASSEMBLERLOCOBJEnter
Page 171 and 172: iAPX286 MACRO ASSEMBLER·· Enter ~
Page 173 and 174: iAPX286 'UCRO USE148LER Ente,. P,.o
Page 175 and 176: iAPX286 MACRO ASSEMBLEREnt9~ P~otec
Page 177: iAPX286 MACRO ASSEMBLE~ INITIAL TAS
Page 181 and 182: CHAPTER 11BINDING AND LOADINGBindin
Page 183 and 184: BINDING AND LOADINGNamingThe names
Page 185 and 186: BINDING AND LOADING$ COMPACT (NUCLE
Page 187 and 188: interBINDING AND LOADINGsystem-IDiA
Page 189 and 190: BIND.ING AND LOADINGConverting a Pr
Page 191 and 192: BINDING AND LOADINGThe OMF of each
Page 193 and 194: interBINDING AND LOADINGsystem-IDiA
Page 195 and 196: BINDING AND LOADINGPL/M-2B6 COMPILE
Page 197 and 198: BINDING AND LOADI.NGPL/M-286 COMPIL
Page 199 and 200: BINDING AND LOADINGPL/M-286 COMPILE
Page 201 and 202: BINDING AND LOADINGPL/M-2B6 COMPILE
Page 203 and 204: BINDING AND LOAD.INGPL/M-286 COMPIL
Page 205 and 206: interBINDING AND LOADINGPL/M-286 CO
Page 207 and 208: BINDING AND LOADINGPL/M-286 COMPILE
Page 209: Numerics Processor Extension 12
Page 212 and 213: NUMERICS PROCESSOR EXTENSIONMath Pr
Page 214 and 215: interNUMERICS PROCESSOR EXTENSION
Page 217: Extended Protection13
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EXTENDED PROTECTIONIndirect NamingT
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EXTENDED PROTECTIONanother procedur
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Glossary
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GLOSSARYbootloadable module: a modu
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GLOSSARYexception: a processor-dete
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GLOSSARYintersegment reference: a r
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GLOSSARYoutward call: the attempt t
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GLOSSARYscheduling state: one of se
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GLOSSARYvirtual address: an address
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INDEXES register, 2-17, 2-18, 2-21,
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INDEXpresent bit, 2-2, 2-3, 2-9, 5-
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interu.s. SALES OFFICESALAIWIA IlEQ
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interu.s. DISTRIBUTORSNEW YORK (C"n
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intJINTEL INTERNATIONAL SALES OFFIC
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iAPX 286 Operating System Writers Guide 1983

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