TI486 Microprocessor - Al Kossow's Bitsavers

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Functional Timing Figure 4-23. Requesting Hold from Active Non-Pipelined Bus Cycle 1 Non-pipelined (Read) Hold Acknowledge Cycle 2 Non-pipelined (Write) I CLK2 HOLD HLDA A31-A2, BE3-BEO, DIG, MIlO, WiR --~~--~------~-~ NA I I HOLD asserted no later than READY asserted I I ! : I __(FI~ing)__ j,"---;---......I --:\ Valid 2 I 1---..,..---....., I I I I ---!---...... ~\...-- (FI~ing~ __ l VI I I I ,"-----:r. I I I : (Negated, or Last Locked Cycle) ~ I I . Valid 1 . ---~----K Valid 2 I I I 1'--------- : : (Floating) : ~I I (Floating) : 031-00 -r----r---i--- In 1 --1----1 -( Out2 I I I (Floating) II '----..----- I I I I I Note: HOLD is a synchronous input and can be asserted at any CLK2 edge, provided setup and hold requirements are met. This waveform is useful for determining hold acknowledge latency. 4-47
Functional Timing Figure 4-24. Requesting Hold from Active Pipelined Bus Cycle 1 Pipelined (Write) Hold Acknowledge Cycle 2 Non-Pipelined (Read) T1P T21 T21 Th Th T1 : T2 CLK2 HOLD HLDA A31-A2, BE3-BEO, DIG, MilO, W/R - ....... -o/--..,...~~~~~~~~ I I I I I I I __ (Flo_ating) __ ~~--....I:------' --X Valid 2 1 :~----~.------- I I I ---------r I I 1\- (Floating) I Vi 1 1 1 1 1 1 I' I NA~ • 1 1 1 1 1 I I I BSI6~ i i~ 1 1 1 1 1 1 1 1 ~i~i~i 1~(Negated' or Last Locked Cycle) I~ I . I I I: -; • (Floating) I : . Valid 1 ---i----K Valid 2 I 1 I I I I _ I (Ao.:ting) : ~ 031-00 Out X Out 1 >-t----r--- i -- ~ I 1 I I I I . I I , Note: HOLD is a synchronous input and can be asserted at any CLK2 edge, provided setup and hold requirements are met. This waveform is useful for determining hold acknowledge latency. 4-48 <strong>TI486</strong>DLCIE Bus Interface
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.TEXAS INSTRUMENTS TI486 Microproce
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TI486 Microprocessor Reference Guid
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Preface Read This First About This
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About This Manual Appendix D Orderi
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Contents 1 Product Overview .......
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Contents 5.5 AC Characteristics . .
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1-1 TI486SLC/E Functional Block Dia
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Figures 4-27 SUSP Initiated Suspend
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Tables 5-3 Absolute Maximum Ratings
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Product Overview 1-1
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Chapter 1 Product Overview Features
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1.2 Differences Between the TI486SL
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Tl486SLCIE Overview Figure 1-2. TI4
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Tl486DLCIE Overview 1.4 TI486DLC/E
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TI486DLCIE Overview The TI486DLC/E
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Power Management / System Managemen
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Programming Interface 2-1
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Chapter 2 In this chapter, the inte
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Processor Initialization Table 2-1.
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Instruction Set Overview 2.2 Instru
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Register Set 2.3 Register Set There
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Register Set Pointer and Index Regi
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Register Set 2.3.1.2 Segment Regist
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Register Set 2.3.1.3 Instruction Po
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Register Set 2.3.2 System Register
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Register Set 2.3.2.1 Control Regist
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Register Set 2.3.2.2 Descriptor Tab
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Register Set Table 2-6. Segment Des
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Register Set During task switching,
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Register Set The CCRO register (Tab
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Register Set Table 2-9. TI486DLCIE
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Register Set Table 2-12. ARR 1-ARR4
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Register Set 2.3.2.6 Test Registers
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Register Set Table 2-14. TR6 and TR
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Address Spaces 2.4 Address Spaces T
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Address Spaces 2.4.2 Memory Address
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Address Spaces Figure 2-21. Real Mo
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Address Spaces Figure 2-24. Paging
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Interrupts and Exceptions 2.5 Inter
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Interrupts and Exceptions 2.5.3 Int
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Interrupts and Exceptions Table 2-2
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System Management Mode 2.6 System M
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System Management Mode Figure 2-29.
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System Management Mode The new SMM
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System Management Mode During SMM o
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Protection The Current Privilege Le
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Virtual 8086 Mode 2.9 Virtual 8086
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TI486SLC/E Bus Interface 3-1
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Chapter 3 TI486SLC/E Bus Interface
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Overview Table 3-1. TI486SLCIE Sign
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Overview Table 3-2. Terminal Functi
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Overview 3.1.1 Bus Cycle Definition
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Overview Table 3-5 shows the state
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Functional Timing Figure 3-3. Bus A
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Functional Timing 3.2.2.1 Bus Cycle
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Functional Timing Non-Pipelined Wai
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Functional Timing Because of the de
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Functional Timing Pipelined Wait St
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Functional Timing Initiating and Ma
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Functional Timing Figure 3-12. Comp
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Functional Timing Figure 3-13. Inte
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Functional Timing Shutdown Indicati
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Functional Timing Figure 3-17. Pipe
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Functional Timing As shown in Figur
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Functional Timing Figure 3-19. Requ
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Functional Timing Figure 3-21. Requ
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Functional Timing Figure 3-22. 8MI
Page 140 and 141: Functional Timing HALT Initiated Su
Page 142 and 143: Functional Timing 3.2.12 Float Figu
Page 144 and 145: TI486DLC/E Bus Interface 4-1
Page 146 and 147: Chapter 4 TI486DLC/E Bus Interface
Page 148 and 149: Overview Table 4-1. TI486DLCIE SIgn
Page 150 and 151: Overview Table 4-2. Terminal Functi
Page 156 and 157: Overview Table 4-6. Signal States D
Page 158 and 159: Overview 4.1.2 Power Management 4.1
Page 160 and 161: Functional Timing 4.2 Functional Ti
Page 162 and 163: Functional Timing The TI486DLC/E da
Page 164 and 165: Functional Timing Non-Pipelined Rea
Page 166 and 167: Functional Timing Initiating and Ma
Page 168 and 169: Functional Timing Figure 4-8. Faste
Page 170 and 171: Functional Timing Figure 4-9. Vario
Page 172 and 173: Functional Timing Once a pipelined
Page 174 and 175: Functional Timing 4.2.3 Bus Cycles
Page 176 and 177: Functional Timing Pipelined Cycles
Page 178 and 179: Functional Timing LOCK is activated
Page 180 and 181: Functional Timing 4.2.6 Halt and Sh
Page 182 and 183: Functional Timing Figure 4-17. Pipe
Page 184 and 185: Functional Timing Figure 4-19. Non-
Page 186 and 187: Functional Timing The TI486DLC/E sa
Page 188 and 189: Functional Timing 4.2.9 Hold Acknow
Page 192 and 193: Functional Timing 4.2.10 Coprocesso
Page 194 and 195: Functional Timing 4.2.12 Power Mana
Page 196 and 197: Functional Timing Stopping the Inpu
Page 198 and 199: Electrical Specifications 5-1
Page 200 and 201: Chapter 5 Electrical Specifications
Page 202 and 203: ElectricalConnecnons It is recommen
Page 204 and 205: Recommended Operating Conditions 5.
Page 206 and 207: DC Electrical Characteristics Table
Page 208 and 209: AC Characteristics Figure 5-2. TI48
Page 210 and 211: AC Characteristics Table 5-9. AC Ch
Page 212 and 213: AC Characteristics Table 5-11. AC C
Page 214 and 215: ____ AC Characteristics 5.5.3 RESET
Page 220 and 221: Mechanical Specifications 6-1
Page 222 and 223: Chapter 6 Mechanical Specifications
Page 224 and 225: Pin Assignments Table 6-1. TI486SLC
Page 226 and 227: Pin Assignments Figure 6-3. TI486DL
Page 228 and 229: Package Dimensions 6.2 Package Dime
Page 230 and 231: Thermal Characteristics 6.3 Thermal
Page 232 and 233: Instruction Set 7-1
Page 234 and 235: Chapter 7 Instruction Set This sect
Page 236 and 237: Instruction Fields 7.2 Instruction
Page 238 and 239: Instruction Fields 7.2.5 reg Field
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Instruction Fields Table 7-7. mod r
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Instruction Fields 7.2.11 sreg3 Fie
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Clock Count Summary 7.4 Clock Count
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--- --;.J -L 01 Table 7-17. Instruc
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I . ~ -.....J Table 7-17. Instructi
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Table 7-17. Instructions, Opcodes,
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-....J N (J.) Table 7-17. Instructi
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I I i I i Table 7-17. Instructions,
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...... ...... '" Table 7-17. Instru
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-....J N co Table 7-17. Instruction
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"-.I ~ Table 7-17. Instructions, Op
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U Appendix A TI486 SMM Pro rammer's
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SMM Implementation A.2 SMM Implemen
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Figure A-1. SMM Memory Space Header
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SMM Implementation 6) NMI is the on
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Instruction Summary A.4 Instruction
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Instruction Summary A.4.3 Resume No
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Instruction Summary A.4.6 Save LDTR
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8MI Handler Example A.5 SMI Handler
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8MI Handler Example execute_halt: C
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8MI Handler Example COMMENT A The T
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8MI Handler Example arrl arr2 arr3
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.MODEL SMALL . STACK .386P INCLUDE
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Testing/Debugging SMM Code sgdt COM
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Testing/Debugging SMM Code i*******
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TI486 Power Management Features A.7
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Detection of Tl486 CPU A.9 Detectio
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Detection of SMM Capable Version A.
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i**********************************
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A.11 SMM Feature Comparison SMM Fea
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SMM Instruction Macros COMMENT A Co
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SMM Instruction Macros SMM Instruct
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A.14 Format of Data Used by SVDC/RS
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Altering SMM Code Limits A.1S Alter
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SMM Errata A.16 SMM Errata The foll
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Appendix B TI486 Cache Flush B.1 Ge
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Appendix C TI486 BIOS Modification
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Introduction Some example assembler
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Appendix D Ordering Information 0.1
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~TEXAS INSTRUMENTS Printed in U.S.A
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TI486 Microprocessor - Al Kossow's Bitsavers

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