alienware r1

register of S3C2410 is cleared, which is only used to disable the watchdog. The code is located at 234 rows: ldr r0, =pWTCON mov r1, #0x0 str r1, [r0] Then, in the second row, set the intmsk register of the S3C2410 interrupt controller to full 1,Intsubmsk is set to 0x7ff to prohibit all source interruptions. This is described in detail on page 1 of the S3C2410 manual: mov

value, not an absolute address, and its Values are computed by the assembler (relative addressing in the reference addressing method). It is a 24-bit signed number, the left two-bit symbol expands to 32-bit, and the valid offset is 26 bits (the address space of the front and back 32MB). The following directives:# The program unconditionally jumps to the label label to execute B Label; When the z-condition code is set in the #当CPSR register, the program jumps to the label label to performCMP

R1 (config) # router ospf 10 R1 (config-router) # net 192.168.12.0 0.0.255 a 0 R1 (config-router )# * Dec 6 05:51:32. 975: OSPF: Interface Ethernet0/0 going Up * Dec 6 05:51:32. 975: OSPF: Send hello to 224.0.0.5 area 0 on Ethernet0/0 from 192.168.12.1 * Dec 6 05:51:33. 475: OSPF: Build router LSA for area 0, router ID 1.1.1.1, seq 0x80000001, process 10

Movr0, #0x53000000 Movr1, #0x0 Strr1, [r0] @ Disable all interrupts Movr0, #0x4A000000 Movr1, #0 xffffffff Strr1, [r0, #0x00000008] Ldrr1, = 0x3ff Strr1, [r0, # 0x0000001C] @ Initialise system clocks Movr1, # CLK_CTL_BASE Mvnr2, #0xff000000 Strr2, [r1, # oLOCKTIME] @ Movr0, #0x4C000000 Movr1, #0x3 Strr1, [r0, #0x00000014] Mrcp15, 0, r1, c1, c0, 0 @ read ctrl

Because arm's arithmetic operations do not support the direct manipulation of memory addresses, the data in memory is loaded into the register first. The LDR directive is doing this, called the indirect access mode.A total of 3 * 39 modes, First direct offset, first offset, then offset three categories, refers to how the operation of the source operand, is directly used, or before loading the operation of the source operand (such as address plus the number of values), or after loading the operan

structure of a simple project's operation:Linker script:gboot.lds:Output_arch (ARM)ENTRY (_start)SECTIONS {????. = 0x50008000;????????. = ALIGN (4);????. Text:???? {???? START.O (. Text)???? * (. Text)????}?????. = ALIGN (4);????. Data:???? {???? * (. Data)????}????????. = ALIGN (4);???? Bss_start =.;????. Bss:???? {???? * (. BSS)????}???? Bss_end =.;}Results of the operation:The following is the implementation of the assembly code:mov r1, #6MOV r2,r

*.elfThe structure of a simple project's operation:Linker script:gboot.lds:Output_arch (ARM)ENTRY (_start)SECTIONS {????. = 0x50008000;????????. = ALIGN (4);????. Text:???? {???? START.O (. Text)???? * (. Text)????}?????. = ALIGN (4);????. Data:???? {???? * (. Data)????}????????. = ALIGN (4);???? Bss_start =.;????. Bss:???? {???? * (. BSS)????}???? Bss_end =.;}Results of the operation:The following is the implementation of the assembly code:mov r1, #

ARM instruction Set 2The ARM microprocessor supports load/store instructions for transferring data between registers and memory, which is used to transfer data from memory to registers and the storage instruction to do the opposite.LDR instruction (different from MOV, MOV can only operate universal Register)The LDR instruction format is:ldr{conditions} Destination register,The LDR directive is used to transfer a 32-bit word data from memory to the destination register. This instruction is typica

can modify the value of a private member propertySelf.__life_value-=print ("%s was hit ......"%self.name)def buy_gun (self,gun_name):print ("%s just bought%s"% (Self.name, gun_name))# Public access methods available externallydef Show (self):Print ("%s life left only:%s"% (Self.name,self.__life_value))def function (self):self.__got_shot ()# destructors---->> are executed when the instance is disposed, ready for destruction, usually for some finishing touches, closing the memory space, closing t

for immediate number Representation #数字 [2] Registers R0-r15 [3] Register shift Logical shift: LSL (move left) LSR (move right) Arithmetic shift: ASR (move right: the left complement is the symbol bit at this point) Representation R0,LSL #3 => r0 Error writing #3, LSL #3 (only register shift) 2. Data transfer Instructions [1]mov Target register, second operand mov r0, #3-> r0 = 3 mov r0,r1-> r0 = R1