Thiết kế và lập trình hệ thống - Chương 30

... scull_follow(dev, item);/* Check for end-of-fi le in the above call, NULL quantum_set. */ if (!dptr->data) goto out;/* Check for end-of-fi le, NULL quantum. */ if (!dptr->data[s_pos]) goto ... MARYLAND BALTIMORE COUNTY1 9 6 6Scull’s Memory Usage dev->size = 0; dev->quantum = scull_quantum; dev->qset = scull_qset; dev->next = NULL; return 0; }This routine is called ... dev->...

Ngày tải lên: 15/11/2012, 11:07

... Paging:1112212231[00]0C[00]10 0x08A0Virtual Address:CR300010 ++0x00010 0300 x050010x050000000x050010000x050010400x000200000x000210000x00 0300 000x00 030+ 0x00 0300 8A[binary]hex0x 0301 008A=0x 030* 4*4=0x040 Systems Design & ... 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 micr...

Ngày tải lên: 15/11/2012, 11:07

... 64-bit wide data bus.The 3 0- 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 ... SIMM (Single In-line Memory Modules)boards .3 0- pin SIMMs come in 1M X 8, 1M X 9 (parity), 4M X 8, 4M X 9.72-pin SIMMs come in 1/2/3/8/16M X 32 or 1M X 36 (parity).5 10 15 20 25 30 35 40 45...

Ngày tải lên: 15/11/2012, 11:07

... )X16G X( )-- -- - -- - -- - -- - -- - -- - -- - -X27X26X25X24X22X21X18+ + + + + +X16X15X21+ + +-- -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - -- - =X16X15X21+ ... 15.Therefore, no more than 2 bytes are needed independent of the data block size.CRCM X( )XnG X( )--...

Ngày tải lên: 15/11/2012, 11:07

... InterfaceI1I2I3I4I5I6I7I8I9I1016L8O1O2O3O4O5O6O7O8A29A30A31I1I2I3I4I5I6I7I8I9I1016L8O1O2O3O4O5O6O7O8A19A20A21A22A23A24A25A26A27A28A0A15O0O7......CEOE27512D0-D7D8-D15D15-D23D24-D31D56-D63D48-D55D40-D47D32-D39A3-A18MRDCA0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512A0A15O0O7......CEOE27512(64K ... p...

Ngày tải lên: 15/11/2012, 11:07

... Rectangular Areas’, 10, 0temp_buf: times 200 db 0temp_buf_size: equ $-temp_bufneg_exponent: dd -1 0 0301 H302H303H12H34HLow-order byteHigh-order byteStorage of the number 1234 Systems Programming 80x86 ... directive db:Word-sized (dw) and doubleword-sized data (dd):Little endian: Least significant byte is always stored in the lowest-num-bered memory location.floatstr db ’Float number -&...

Ngày tải lên: 15/11/2012, 11:07

... dlaxbxcxdxspbpdisiAccumulatorBase IndexCountDataStack PointerBase PointerDestination IndexSource Index16-bitregisters32-bitextensionsah alax8-bit16-bitnames Systems Design & Programming 80x86 Assembly I CMPE 3103 (Feb ... MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing Modes Base relative-plus-indexA second variation includes: mov eax, [ebx+edi+4] Scaled-indexA second variation includes:...

Ngày tải lên: 15/11/2012, 11:07

... MARYLAND BALTIMORE COUNTY1 9 6 6Data Addressing ModesBase-Plus-Index addressing:eaxebxecxedxespebpediesi1 0 0 0csdsesssA B 0 30 0 1 0MemoryF012AB 030 1 0 0+1010H+mov edx, [ebx+edi]F 0 1 20 0 0 0SegBasePagingPhysical ... 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...

Ngày tải lên: 15/11/2012, 11:07

... BALTIMORE COUNTY1 9 6 6Arithmetic Operationssub eax, ebxdec edi;Subs registers - Carry flag.sbb ecx, ebx;eax=eax-ebxcmp al, 10Hjae LABEL1;Jump if equal or below.jbe LABEL2;if ecx==eax, eax=edx ... Resultxor ah, ch ;ah=ah XOR chtest al, 4jz LABEL;Jump to LABEL if bit 2 is zero.;Tests bit 2 in al -- 00000100not ebxneg TEMP Systems Design & Programming 80x86 Assembly IV CMPE 3107 (Mar...

Ngày tải lên: 15/11/2012, 11:07

... 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...

Ngày tải lên: 15/11/2012, 11:07