TI486 Microprocessor - Al Kossow's Bitsavers

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Contents 5.5 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-10 5.5.1 Measurement Points for Switching Characteristics ...................... 5-10 5.5.2 CLK2 Timing Measurement Points ................................... , 5-12 5.5.3 RESET Setup and Hold Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-17 5.504 TI486SLC/E and TI486SLC/E-V Switching Waveforms .................. 5-17 5.5.5 TI486DLC/E Switching Waveforms ................................... 5-20 6 Mechanical Specifications ....................................................... 6-3 6.1 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-4 6.2 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-9 6.3 Thermal Characteristics .................................................... 6-11 7 Instruction Set .................................................................. 7-3 7.1 General Instruction Format ................................................... 7-4 7.2 Instruction Fields ........................................................... 7-5 7.2.1 Prefixes ..................................................... ~ . . . . .. 7-5 7.2.2 Opcode Field ....................................................... 7-6 7.2.3 w Field ......................... , ....... , ........................... 7-6 7.2.4 d Field ............................................................. 7-6 7.2.5 reg Field ........................................................... 7-7 7.2.6 mod and rIm Field ................................................... 7-8 7.2.7 mod and base Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-9 7.2.8 ss Field ........................................................... 7-10 7.2.9 index Field ......................................................... 7-10 7.2.10 sreg2 Field ........................................................ 7-10 7.2.11 sreg3 Field ........................................................ 7-11 7.2.12 eee Field ......................................................... , 7-11 7.3 Flags ..................................................................... 7-12 704 Clock Count Summary ..................................................... 7-13 7.4.1 Assumptions ....................................................... 7-13 704.2 Abbreviations ...................................................... 7-13 A TI486 SMM Programmer's Guide .................................................. A-1 A.1 SMM Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A-2 A.1.1 Introduction ..... 0 ••••••••••••••••••••••••••••••••••••••••••••••••••• A-2 A.1.2 SMM Implementation ................................................ A-2 A.2 SMM Implementation ....................................................... A-3 A.2.1 Hardware Background ............................................... A-3 A.2.2 SMM Software Considerations ........................................ A-4 A.3 Enabling SMM ............................................................. A-8 Ao4 Instruction Summary ........................................................ A-9 Ao4.1 Restore Register and Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10 Ao4.2 Restore LDTR and Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A-10 Ao4.3 Resume Normal Mode .............................................. A-11 Ao404 Restore TSR and Descriptor ......................................... A-12 Ao4.5 Save Register and Descriptor ........................................ A-12 Ao4.6 Save LDTR and Descriptor .......................................... A-13 Ao4.7 Save TS and Descriptor .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14 A.5 SMI Handler Example ...................................................... A-15 xi
Contents A.6 Testing/Debugging SMM Code .............................................. A-22 A.6.1 Software Only Debugging ........................................... A-22 A.7 TI486 Power Management Features ......................................... A-29 A.7.1 Reducing the Clock Frequency ....................................... A-29 A. 7.2 Suspend Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-29 A.8 Loading SMM Memory With an SMM Program from Main Memory ............... A-30 A.9 Detection of TI486 CPU .................................................... A-31 A.10 Detection of SMM Capable Version .......................................... A-33 A.11 SMM Feature Comparison .................................................. A-37 A.12 SMM Instruction Macros - SMIMAC.INC ...................................... A-38 A.13 TI486DLC/E and SMM ..................................................... A-42 A.14 Format of Data Used by SVDC/RSDC Instructions ............................. A-43 A.15 Altering SMM Code Limits .................................................. A-45 A.16 SMM Errata ............................................................... A-47 B TI486 Cache Flush ............................................................... B-1 B.1 General Cache Invalidation .................................................. B-1 B.1.1 Cache Invalidation for Systems With No Secondary Cache or a Parallel Secondary Cache ........................................ 8-1 8.1 .2 Cache Invalidation for Systems With A Serial Secondary Cache ........... 8-2 C TI486 BIOS Modification Guide ................................................... C-1 C.1 Introduction ............................."................................... C-1 C.1.1 Power-On and Hard Reset ............................................ C-1 C.1.2 Protected-Mode to Real-Mode Switching ............................... C-2 C.1.3 Soft ResetlCTRL-ALT-DEL ........................................... C-2 C.1.4 Turning On and Off the Internal Cache ................................. C-2 o Ordering Information ............................................................ 0-1 D.1 Ordering Information ........................................................ D-1 D.1.1 Part Number Components ............................................ D-1 D.1.2 Part Numbers for TI486 Processors Offered ............................ D-2 xii
Page 1 and 2: .TEXAS INSTRUMENTS TI486 Microproce
Page 4 and 5: TI486 Microprocessor Reference Guid
Page 6 and 7: Preface Read This First About This
Page 8 and 9: About This Manual Appendix D Orderi
Page 10 and 11: Contents 1 Product Overview .......
Page 14 and 15: 1-1 TI486SLC/E Functional Block Dia
Page 16 and 17: Figures 4-27 SUSP Initiated Suspend
Page 18 and 19: Tables 5-3 Absolute Maximum Ratings
Page 20 and 21: Product Overview 1-1
Page 22 and 23: Chapter 1 Product Overview Features
Page 24 and 25: 1.2 Differences Between the TI486SL
Page 26 and 27: Tl486SLCIE Overview Figure 1-2. TI4
Page 28 and 29: Tl486DLCIE Overview 1.4 TI486DLC/E
Page 30 and 31: TI486DLCIE Overview The TI486DLC/E
Page 32 and 33: Power Management / System Managemen
Page 34 and 35: Programming Interface 2-1
Page 36 and 37: Chapter 2 In this chapter, the inte
Page 38 and 39: Processor Initialization Table 2-1.
Page 40 and 41: Instruction Set Overview 2.2 Instru
Page 42 and 43: Register Set 2.3 Register Set There
Page 44 and 45: Register Set Pointer and Index Regi
Page 46 and 47: Register Set 2.3.1.2 Segment Regist
Page 48 and 49: Register Set 2.3.1.3 Instruction Po
Page 50 and 51: Register Set 2.3.2 System Register
Page 52 and 53: Register Set 2.3.2.1 Control Regist
Page 54 and 55: Register Set 2.3.2.2 Descriptor Tab
Page 56 and 57: Register Set Table 2-6. Segment Des
Page 58 and 59: Register Set During task switching,
Page 60 and 61: Register Set The CCRO register (Tab
Page 62 and 63:
Register Set Table 2-9. TI486DLCIE
Page 64 and 65:
Register Set Table 2-12. ARR 1-ARR4
Page 66 and 67:
Register Set 2.3.2.6 Test Registers
Page 68 and 69:
Register Set Table 2-14. TR6 and TR
Page 70 and 71:
Address Spaces 2.4 Address Spaces T
Page 72 and 73:
Address Spaces 2.4.2 Memory Address
Page 74 and 75:
Address Spaces Figure 2-21. Real Mo
Page 76 and 77:
Address Spaces Figure 2-24. Paging
Page 78 and 79:
Interrupts and Exceptions 2.5 Inter
Page 80 and 81:
Interrupts and Exceptions 2.5.3 Int
Page 82 and 83:
Interrupts and Exceptions Table 2-2
Page 84 and 85:
System Management Mode 2.6 System M
Page 86 and 87:
System Management Mode Figure 2-29.
Page 88 and 89:
System Management Mode The new SMM
Page 90 and 91:
System Management Mode During SMM o
Page 92 and 93:
Protection The Current Privilege Le
Page 94 and 95:
Virtual 8086 Mode 2.9 Virtual 8086
Page 96 and 97:
TI486SLC/E Bus Interface 3-1
Page 98 and 99:
Chapter 3 TI486SLC/E Bus Interface
Page 100 and 101:
Overview Table 3-1. TI486SLCIE Sign
Page 102 and 103:
Overview Table 3-2. Terminal Functi
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Overview 3.1.1 Bus Cycle Definition
Page 110 and 111:
Overview Table 3-5 shows the state
Page 112 and 113:
Functional Timing Figure 3-3. Bus A
Page 114 and 115:
Functional Timing 3.2.2.1 Bus Cycle
Page 116 and 117:
Functional Timing Non-Pipelined Wai
Page 118 and 119:
Functional Timing Because of the de
Page 120 and 121:
Functional Timing Pipelined Wait St
Page 122 and 123:
Functional Timing Initiating and Ma
Page 124 and 125:
Functional Timing Figure 3-12. Comp
Page 126 and 127:
Functional Timing Figure 3-13. Inte
Page 128 and 129:
Functional Timing Shutdown Indicati
Page 130 and 131:
Functional Timing Figure 3-17. Pipe
Page 132 and 133:
Functional Timing As shown in Figur
Page 134 and 135:
Functional Timing Figure 3-19. Requ
Page 136 and 137:
Page 138 and 139:
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:
Page 152 and 153:
Page 154 and 155:
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 190 and 191:
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 216 and 217:
Page 218 and 219:
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
Page 240 and 241:
Instruction Fields Table 7-7. mod r
Page 242 and 243:
Instruction Fields 7.2.11 sreg3 Fie
Page 244 and 245:
Clock Count Summary 7.4 Clock Count
Page 246 and 247:
--- --;.J -L 01 Table 7-17. Instruc
Page 248 and 249:
I . ~ -.....J Table 7-17. Instructi
Page 250 and 251:
Table 7-17. Instructions, Opcodes,
Page 252 and 253:
Page 254 and 255:
-....J N (J.) Table 7-17. Instructi
Page 256 and 257:
I I i I i Table 7-17. Instructions,
Page 258 and 259:
...... ...... '" Table 7-17. Instru
Page 260 and 261:
-....J N co Table 7-17. Instruction
Page 262 and 263:
"-.I ~ Table 7-17. Instructions, Op
Page 264 and 265:
Page 266 and 267:
U Appendix A TI486 SMM Pro rammer's
Page 268 and 269:
SMM Implementation A.2 SMM Implemen
Page 270 and 271:
Figure A-1. SMM Memory Space Header
Page 272 and 273:
SMM Implementation 6) NMI is the on
Page 274 and 275:
Instruction Summary A.4 Instruction
Page 276 and 277:
Instruction Summary A.4.3 Resume No
Page 278 and 279:
Instruction Summary A.4.6 Save LDTR
Page 280 and 281:
8MI Handler Example A.5 SMI Handler
Page 282 and 283:
8MI Handler Example execute_halt: C
Page 284 and 285:
8MI Handler Example COMMENT A The T
Page 286 and 287:
8MI Handler Example arrl arr2 arr3
Page 288 and 289:
.MODEL SMALL . STACK .386P INCLUDE
Page 290 and 291:
Testing/Debugging SMM Code sgdt COM
Page 292 and 293:
Testing/Debugging SMM Code i*******
Page 294 and 295:
TI486 Power Management Features A.7
Page 296 and 297:
Detection of Tl486 CPU A.9 Detectio
Page 298 and 299:
Detection of SMM Capable Version A.
Page 300 and 301:
i**********************************
Page 302 and 303:
A.11 SMM Feature Comparison SMM Fea
Page 304 and 305:
SMM Instruction Macros COMMENT A Co
Page 306 and 307:
SMM Instruction Macros SMM Instruct
Page 308 and 309:
A.14 Format of Data Used by SVDC/RS
Page 310 and 311:
Altering SMM Code Limits A.1S Alter
Page 312 and 313:
SMM Errata A.16 SMM Errata The foll
Page 314 and 315:
Appendix B TI486 Cache Flush B.1 Ge
Page 316 and 317:
Appendix C TI486 BIOS Modification
Page 318 and 319:
Introduction Some example assembler
Page 320 and 321:
Appendix D Ordering Information 0.1
Page 322:
~TEXAS INSTRUMENTS Printed in U.S.A
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