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Verilog Basic - hw(1) 과제(1) - 3bit binary(A,B,C)로 표현된 7가지 경우에 대하여 m0,m2,m6,m7에 대해서만 true(y=1) Boolean Expression Y = A'C' + AB wire 구현 : wire는 초반에 선언을 모두 하지 않고, main body에서 gate들을 구현하며 필요로 하는 것을 추가하여 선언한다. Verilog Design source module _8case_4true(out, i0, i1, i2); //output,input declaration output out; input i0,i1,i2; //wire declaration wire n0,n2; wire a0,a1; //gate declaration //not gate not ..

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Lecture 1. Debugging a program Editing, compiling, running, and debugging a C program in Linux. Understanding ASM code: where is local variable, stack change during call/ret instruction, .... Understanding the process image. 1. Example program: ex1.c #include void main(){ int x; x=30; printf("x is %d\n", x); } 2. Compiling and Running gcc –m32 -o ex1 ex1.c ./ex1 x is 30 3. ASM code objdump -D -M..

system_call / interrupt(2) [os week3 interrupt 이어서..] 7-1) sys_call_table[] is in arch/x86/kernel/syscall_table_32.S. How many system calls does Linux 2.6 support? 0부터 시작했으므로 linux 2.6이 제공하는 system calls는 총 326개이다. 7-2)What are the system call numbers for exit, fork, execve, wait4, read, write, and mkdir? 파일 내에서 "/찾고있는text"+enter를 통해 각 system call의 number를 찾는다. Role of sys_ni_syscall 7-3) Find s..

Lecture 4: Interrupt An operating system is a collection of service routines. The service routine can be executed by a request from an application (system call interrupt). Or it runs automatically when there is a serious error while running an application (exception interrupt) or when there is an external hardware event that the operating system has to handle (hardware interrupt). The service ro..

Lecture 3. pc hardware, execution cycle, boot sequence, grub boot loader, Kernel Compiling 1. pc hardware 1) computer 2) Intel x86 cpu registers: ax, bx, cx, dx, cs, ds, ss, es, sp, bp, ip, si, di, flag register (for 32-bit: eax, ebx, ecx, edx, esp, ebp, eip, esi, edi) (for 64-bit: rax, rbx, rcx, rdx, rsp, rbp, rip, rsi, rdi) ax, bx, cx, dx: General purpose. Can contain any data cs, ds, ss, es :..

Lecture 2: Installing/Reading Linux Kernel 1. What's in the linux kernel init: start up code main.c : beginning of linux kernel: cpu-indendent code for basic system management fork.c, exit.c, sched.c : process creation, exit, scheduling arch : cpu-dependent code for basic system management arch/x86 : cpu-dependent code for intel x86 cpu arch/x86/boot : boot-related code arch/x86/kernel: low-leve..