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kernel.cpp
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kernel.cpp
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#include "types.h"
#include "gdt.h"
#include "interrupts.h"
void printf(char *str){
static uint16_t *VideoMemory = (uint16_t*)0xb8000;
static uint8_t x = 0, y = 0;
for (int i=0; str[i] != '\0'; i++)
switch(str[i]){
case '\n':
y++;
x = 0;
break;
default:
VideoMemory[80*y+x] = (VideoMemory[80*y+x] & 0xFF00) | str[i];
x++;
break;
}
if (x >= 80) {
x = 0;
y++;
}
if (y >=25) {
for (y = 0; y <25; y++)
for (x = 0; x < 80; x++)
VideoMemory[80*y+x] = (VideoMemory[80*y+x] & 0xFF00) | ' ';
}
}
typedef void (*constructor)();
extern "C" constructor start_ctors;
extern "C" constructor end_ctors;
extern "C" void callConstructors() {
for(constructor *i = &start_ctors; i != &end_ctors; i++) {
(*i)();
}
}
extern "C" void kernelMain(void *multiboot_structure, uint32_t magicnumber){
printf("Loading the communication layer...\n");
printf("Meanwhile remember: pit was here :D\n\n");
GlobalDescriptorTable gdt;
InterruptManager interrupts(0x20, &gdt);
interrupts.Activate();
while(1);
}