99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
#include "../drivers/vga.h"
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#include "../drivers/isr.h"
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#include "../drivers/idt.h"
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#include "../drivers/gdt.h"
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#include "../drivers/paging.h"
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#include "../drivers/keyboard.h"
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#include "../libc/string.h"
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#include "../drivers/serial.h"
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#include "syscalls.h"
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char line[256];
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char input=0;
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void switch_to_user_mode() {
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asm volatile(" \
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cli; \
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mov $0x23, %ax; \
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mov %ax, %ds; \
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mov %ax, %es; \
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mov %ax, %fs; \
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mov %ax, %gs; \
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\
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mov %esp, %eax; \
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pushl $0x23; \
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pushl %eax; \
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pushf; \
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pop %eax; \
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or $0x200,%eax; \
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push %eax; \
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pushl $0x1B; \
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push $1f; \
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iret; \
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1: \
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");
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}
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void main() {
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init_vga(WHITE,BLACK);
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write_string("Initialized VGA\n");
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serial_full_configure(SERIAL_COM1_BASE,12);
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write_string("Initialized COM1 at 9600 baud\n");
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isr_install();
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asm volatile("sti");
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write_string("Setup interrupts\n");
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init_gdt();
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write_string("Setup new GDT\n");
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init_keyboard();
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write_string("Keyboard initialized\n");
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init_paging();
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write_string("Setup paging\n");
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switch_to_user_mode();
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syscall_write_string("MYOS V 1.0\n");
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int mb=8;
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while (1) {
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syscall_write_string(">");
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char buf[256];
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do {
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syscall_gets(buf);
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} while (buf[0]=='\0');
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if (strcmp("pf\n",buf)==0) {
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int* ptr=(int*)(mb*1048576);
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char str[20];
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int_to_ascii(mb,str);
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write_string("Storing ");
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write_string(str);
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str[0]='\0';
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hex_to_ascii(ptr,str);
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write_string(" into ");
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write_string(str);
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write_string("\n");
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*ptr=mb;
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write_string("Loading value\n");
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int x=*ptr;
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write_string("Got ");
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str[0]='\0';
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int_to_ascii(x,str);
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write_string(str);
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write_string("\n");
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mb+=1;
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}
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}
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}
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void user_input(char* str) {
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strcpy(line,str);
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input=1;
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}
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void kgets(char* buf) {
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if (input) {
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strcpy(buf,line);
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input=0;
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} else {
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buf[0]='\0';
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return;
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}
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}
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