Fixed Interrupts bug:

It was a problem about ports(cpu/ports.asm) functions.

README.md

@@ -20,12 +20,13 @@ Then you can run those commands:
 iceOS already have/will have the following features:  
 - [x] Bare metal booting;
 - [x] VGA driver;
-- [ ] Interrupts implementation;
+- [x] Interrupts implementation;
 - [ ] PIC & PIT implementation;
 - [ ] PS2 driver;
-- [ ] Support for x86 architecture;
-- [x] GRUB as bootloader.
-
+- [x] Support for x86 architecture;
+- [x] GRUB as bootloader;
+- [ ] Paging;
+- [ ] Dynamic memory allocation(heap).
 
 ## Resources
 This project is made with different kind of resources and different kind of knowledges, before starting it i read/studied the following resources:
@@ -34,5 +35,6 @@ This project is made with different kind of resources and different kind of know
 - [Operating System Concepts - Silberschatz (2016)](https://www.amazon.it/Sistemi-operativi-Concetti-ed-esempi/dp/8865183713/ref=pd_lpo_sbs_14_img_1?_encoding=UTF8&psc=1&refRID=4A5T2C7KKH7RA0K1T7RV)
 - [The Art Of Electronics - Horowitz (2015)](https://www.amazon.it/gp/product/0521809266/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1)
 - [OSDev wiki](https://wiki.osdev.org/Main_Page)
+- [The Little Book About OS Development](https://littleosbook.github.io/)
 ## License
 iceOS is released under GPLv3, you can obtain a copy of this license by cloning the repository or by visiting [this](https://opensource.org/licenses/GPL-3.0) page.

isodir/boot/grub/grub.cfg

@@ -0,0 +1,7 @@
+set timeout = 0
+set default = 0
+
+menuentry "iceOS" {
+    multiboot2 /boot/iceOS.bin
+    boot
+}

kernel/cpu/ports.asm

@@ -10,7 +10,7 @@ global outb ; Output from port
 global inb  ; Input to port
 
 outb:
-    mov al, [esp + 3]
+    mov al, [esp + 8]
     mov dx, [esp + 4]
     out dx, al
     ret

kernel/drivers/idt.c

@@ -97,7 +97,7 @@ static void init_idt() {
     __asm__ __volatile__ ("sti");
 }
 
-// Taken here: http://wiki.osdev.org/8259_PIC
+// Taken from: http://wiki.osdev.org/8259_PIC
 static void pic_remap(uint8_t offset1, uint8_t offset2) {
     uint8_t a1, a2;
 

kernel/drivers/isr.c

@@ -56,7 +56,8 @@ void isr_handler(registers_t regs) {
         isr_t handler = interrupt_handler[regs.int_num];
         handler(regs);
     } else {
-        kprint_c((uint8_t*)"Received interrupt: ", 20, LIGHT_BROWN, BLACK);
+        uint8_t *buf = (uint8_t*)"\nReceived interrupt: ";
+        kprint_c((uint8_t*)buf,strlen(buf), LIGHT_BROWN, BLACK);
         kprint_c(interrupts_messages[(uint8_t)regs.int_num], 
                  strlen(interrupts_messages[(uint8_t)regs.int_num]),
                  WHITE,

kernel/kernel_main.c

@@ -4,10 +4,17 @@
 #include "libc/stdio.h"
 
 void kernel_main() {
-    clear_prompt();
-    init_prompt(); // Initialize frame buffer
     gdt_setup(); // Setup Global Descriptor Table
     idt_setup(); // Setup Interrupt Descriptor Table
 
+    clear_prompt();
+    init_prompt(); // Initialize frame buffer
     puts("Hello World!");
+
+    /*
+    // Testing some interrupts
+    asm("int $0"); // Division by zero
+    asm("int $4"); // Stack overflow
+    asm("int $1"); // Page fault 
+    */
 }