Thiết kế và lập trình hệ thống - Chương 20

... constant is any 32-bit signed value.Base Relative-Plus-Index addressing:Effective address computed as:seg_base + base + index + constant.Designed to be used as a mechanism to address a two-dimensional ... Programming 80x86 Assembly II CMPE 3102 (Feb. 9, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing ModesBase-Plus-Index addressing:eaxebxecxedxespebpediesi1 0 ... Programming 80x86 Assembly II CMPE 3101 (Feb. 9, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing ModesBase-Plus-Index addressing:Effective address computed as:seg_base...

... ++0x000100300x050010x050000000x050010000x050010400x00 0200 000x000210000x000300000x00030+0x0003008A[binary]hex0x0301008A=0x030*4*4=0x040Systems Design & Programming Micro. Arch. III CMPE 3105 (Feb 2, 200 2)UMBCU M B CUNIVERSITY ... the 80386 and up.Allows a linear address (virtual address) of a program to be located in any por-tion of physical memory.The paging unit is controlled by the microprocessors control registers:311211 ... AddressReservedPEMPEMTSETNEWPAMNWCDPGCR0CR1CR2CR3CR4(Pentium and up)Systems Design & Programming Micro. Arch. III CMPE 3102 (Feb 2, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Memory AddressingMemory Paging:The...

... 4BRASA074157 (2-to-1MUX)A1A2A3A4A5A6A71Y 2Y 3Y 4Y 1Y 2Y 3Y 4YAddress BUSInputs to DRAM0: latch A to Y1: latch B to YSS74157 (2-to-1MUX)Systems Design & Programming Memory I CMPE 31011 (Feb. 25, 200 2)UMBCU ... 70NC++VSSVCCDQ 0-3 1Addr 0-1 1RASCASWPD 1-4 Systems Design & Programming Memory I CMPE 31012 (Feb. 25, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6DRAMsPentiums have a 64-bit wide ... 64-bit wide data bus.The 30-pin and 72-pin SIMMs are not used on these systems.Rather, 64-bit DIMMs (Dual In-line Memory Modules) are the standard.These organize the memory 64-bits wide.The board has...

... )X16G X( )-- -- - -- - -- - -- - -- - -- - -- - -X27X26X25X24X22X21X18+ + + + + +X16X15X21+ + +-- -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - =X16X15X21+ ... )XnG X( )-- -- - -- - -- - -- - -- - -- - Q X( ) R X( )+= =Q(X) is the quotientR(X) is the remainderG X( ) X16X15X21+ + +=Systems Programming 8086/88 Memory Interface II CMPE 31017 (April 10, 200 0 12:36 ... ...CS2764A16A17A18A19A13A14A15CSCSCSCSCSCSCSRD of 8088/86Data BusAddress BusF2000-F3FFFF0000-F1FFFF4000-F5FFFF6000-F7FFFF8000-F9FFFFA000-FBFFFFC000-FDFFFFE000-FFFFFAddress spaceF0000H-FFFFFHA13 through A15 selecta 2764A16 through...

... pin on RAS)A8S1S0MUX256-to-1MUX256-to-1MUX256-to-1MUX256-to-164K array(256 X 256)2552541064K array(256 X 256)64K array(256 X 256)64K array(256 X 256)256K X 1 DRAMA0-A7A10-A17Block 0Block 1Block ... InterfaceI1I2I3I4I5I6I7I8I9I1016L8O1O2O3O4O5O6O7O8A29A30A31I1I2I3I4I5I6I7I8I9I1016L8O1O2O3O4O5O6O7O8A19A20A21A22A23A24A25A26A27A28A0A15O0O7......CEOE27512D0-D7D8-D15D15-D23D24-D31D56-D63D48-D55D40-D47D32-D39A3-A18MRDCA0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512(64K ... and selected simultaneously:S0S1S2SN-2SN-1Storage cellInput-Output(M bits)AKAK+1AK+2AL-1Column address =A0AK-1Bit lineWord lineA0 to AK-1Row address =AK to AL-1A column decoder is added toselect...

... lowest-num-bered memory location.floatstr db ’Float number -& gt; %f ’, 10, 0main1_str: db ’ Rectangular Areas’, 10, 0temp_buf: times 200 db 0temp_buf_size: equ $-temp_bufneg_exponent: dd -1 00301H302H303H12H34HLow-order ... (February 3, 200 0 1:22 am)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Assembly DirectivesASCII: Stored using an assembler directive db:Word-sized (dw) and doubleword-sized data ... $-temp_bufneg_exponent: dd -1 00301H302H303H12H34HLow-order byteHigh-order byteStorage of the number 1234Systems Programming 80x86 Assembly Basics CMPE 3104 (February 3, 200 0 1:22 am)UMBCU M B CUNIVERSITY...

... PointerDestination IndexSource Index16-bitregisters32-bitextensionsah alax8-bit16-bitnamesSystems Design & Programming 80x86 Assembly I CMPE 3103 (Feb 4, 200 2)UMBCU M B CUNIVERSITY OF ... 3105 (Feb 4, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing Modes Base relative-plus-indexA second variation includes: mov eax, [ebx+edi+4] Scaled-indexA second ... (Feb 4, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing Modes• Register IndirectAny of eax, ebx, ecx, edx, ebp, edi or esi may be used.• Base-plus-indexAny...

... CMPE 3103 (Mar. 1, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Arithmetic Operationssub eax, ebxdec edi;Subs registers - Carry flag.sbb ecx, ebx;eax=eax-ebxcmp al, 10Hjae ... LABEL;Jump to LABEL if bit 2 is zero.;Tests bit 2 in al -- 00000100not ebxneg TEMPSystems Design & Programming 80x86 Assembly IV CMPE 3107 (Mar. 1, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE ... Design & Programming 80x86 Assembly IV CMPE 31010 (Mar. 1, 200 2)UMBCU M B CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6Flow-of-Control Instructionsja ;Jump if above (Z=0 and...

... 6✬✎✭✮✠✯✰✱✲✲✯✳✴✰✎✵MiscellaneousDataTransferOperations.INandOUT:Transfersabyte,wordordoublewordofdatafrom/toanI/Odeviceinto/outofAL,AXandEAX,respectively.Memoryoperationsarenotavailable(astheyareinINSandOUTS):Twoforms:•Fixed-portaddressing:8-bitportnumberencodedininstruction.8-bitvalueissign-extendedintoaddressbits 8-1 5.Addressbits1 6-3 1areundefined.•Variable-portaddressing:16-bitportnumberstoredinDX. ✁AL✄✠✝☎✝ ... 6✬✎✭✮✠✯✰✱✲✲✯✳✴✰✎✵MiscellaneousDataTransferOperations.MOVSXandMOVZX(80386anduponly):Move-and-sign-extendandMove-and-zero-extend:BSWAP(80486anduponly):Swapsthefirstbytewiththeforth,andthesecondbytewiththethird.Usedtoconvertbetweenlittleendianandbigendian: ✛✁✄ CX✄BL☎✟✒✏☛✎✙☎✡✙☛✛✎✆✕✒☛✡✍✢✝ ✛✁✂ EAX✄ ✁✂✁✢☎✄✙✚✍✙☎✡✙☛✛✎✟✍✚✛✔✡ ✁✂✁✢✒☛✆✆☎✜✂✄✜✟✙EAXEAXEBXECXEDX✡✡✠✠✞✞✝✝✝✝✞✞✠✠✡✡ ✂✁✄☎ ... 6✬✎✭✮✠✯✰✱✲✲✯✳✴✰✎✵MiscellaneousDataTransferOperations.XCHG:Exchangesthecontentsofaregisterwiththecontentsofanyotherregisterormemorylocation.ItcanNOTexchangesegmentregistersormemory-to-memorydata.Byte,wordanddoublewordscanbeexchangedusinganyaddressingmode(exceptimmediate,ofcourse).XLAT:PerformsatablelookupoperationbyconvertingthevalueinALfromanindextoavaluestoredinthecellofatableinmemory. ✁✂✄EDX✄ESI☎✆✆☎✠✖✔☛✏✙✆ ✝✔☛✛✆✟☛ ✁✂✄AL✄ ✁✂✁✢☎✆☎✠✖✔☛✏✙✚✙✏✒✎✡✙✚✔☛✛✌✙✌✍✚ ✗✔✟✓✙✎✜MOV...

... CUNIVERSITY OF MARYLAND BALTIMORE COUNTY1 9 6 6✪✎✫✬✠✭✮✯✰✰✭✱✲✮✎✳Addition,Increment,Add-with-carryandExchange-and-add(80486):Contentsoftherightmost8bitsoftheFLAGSregistercanchange(+Overflow)forarithmeticandlogicinstructions.Flagsinclude:•Z(resultzero?)•C(carryout?)•A(halfcarryout?)•S(resultpositive?)•P(resulthasevenparity?)•O(overflowoccurred?) ✁✁AL✂✄☎✆✆☎✝✞✟✠✡☛☎☞☞✍✌✎✏✍✑✒✓✔✕✖✗✘✚✙✖✙✖✛✜✖✢✏✌✖✗✣✤✥✦✝✧★✩✧✆✄EDI]☛☎☞☞✍✌✕✖✗✪✌✏✖✕✌✞✫✒✕✕✔✬✭✒✗✯✮ ✁✥ECX✂EBX☛★✫✰✱★✫✰✞★✦✰✂★✦✰✱✑✕✪✗✪✓✒✭★✫✰✮✲ ✁✁ECX✂EBX☛✳✌✖☞✬✑✕✒☞☞✪✓✗✴ ... 6✪✎✫✬✠✭✮✯✰✰✭✱✲✮✎✳Subtraction,DecrementandSubtract-with-borrow:Comparison:Changesonlytheflagbits.Oftenfollowedwithaconditionalbranch: ✁✂EAX✂EBX✁✄✥EDI☛✟✷✶✌✕✖✗✪✌✏✖✕✌☎✫✒✕✕✔✬✭✒✗✯✮ ✂✂ECX✂EBX;EAX=EAX-EBX✥✆✝AL✂✎✞✟✠ ✄LABEL1☛✡✷✙✢✪✬✖☛✷✒✭✑✕✶✍✖✭✑☞✮✠✂✄LABEL2☛✪✬✫✰✱✱☎✰✂☎✰✱✌✰✖✭✌✖☎✰✱✫✰✥✆✝✲✥✍✎CX✂DX☛✡✷✙✢✪✬✖☛✷✒✭✑✕✒✶✑✏✖✮ ✂✁✄☎ ... 6✪✎✫✬✠✭✮✯✰✰✭✱✲✮✎✳MultiplicationandDivision:IMUL/IDIV:Signedintegermultiplication/division.MUL/DIV:Unsigned.ALalwaysholdsthemultiplicand(orAXorEAX).ResultisplacedinAX(orDXandAXorEDXorEAX).CandObitsareclearedifmostsignificant8bitsofthe16-bitproductarezero(resultofan8-bitmultiplicationisan8-bitresult).Divisionbyzeroandoverflowgenerateerrors.Overflowoccurswhenasmallnumberdividesalargedividend.✆✁ BL✣✆✁ BX☛✟✢✖✜✪✒✭✂✫✰✱✌✰✁✎✂✟✄✌✪✗✓✖☞✑✓✭✔☎✣✆✁ CX✂✆✝✞✟✠✡;EDX|EAX=EAX*ECX✆✁ ECX☛☎✰✱☎☛✁✦☛✄✷✓✌✪✗✓✖☞☎☛✌✰☞☎✰✱☎✰✁✦✰✄✌✪✗✓✖☞☎✁✣✌CL;DX|AX=(DX|AX)/CX✣✁✣✌CX☛☎✟☞☎☛✱☎✰✘✫☛✂✷✓✌✪✗✓✖☞☛✷✑✏✪✖✓✏☛✪✓☎☛✂✕✖✙✒✪✓☞✖✕✪✓☎✟ ✂✁✄☎...