got the screen cleared, vga cursor moving, looking good

kernel/common.h

@@ -11,4 +11,7 @@ void kpanic();
 
 void liftoff(uint32_t entry_point, uint32_t user_stack) __attribute__((noreturn));
 
+uint8_t inb(uint16_t port);
+void outb(uint16_t port, uint8_t data);
+
 #endif

kernel/drivers/vga/vga.c

@@ -3,7 +3,9 @@
 
 #include <lib/stream.h>
 
-#include "vga.h"
+#include <drivers/vga/vga.h>
+
+#include <common.h>
 
 #define VGA_WIDTH   80
 #define VGA_HEIGHT  25
@@ -43,7 +45,21 @@ static inline uint16_t vga_entry(unsigned char uc, uint8_t color)
 	return (uint16_t) uc | (uint16_t) color << 8;
 }
 
+static void update_cursor()
+{
+	uint16_t pos = terminal_row * VGA_WIDTH + terminal_column;
+	outb(0x3D4, 0x0F);
+	outb(0x3D5, (uint8_t) (pos & 0xFF));
+	outb(0x3D4, 0x0E);
+	outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
+}
+
 void vga_init() {
+	outb(0x3D4, 0x0A);
+	outb(0x3D5, (inb(0x3D5) & 0xC0) | 14);
+	outb(0x3D4, 0x0B);
+	outb(0x3D5, (inb(0x3D5) & 0xE0) | 15);
+
 	terminal_row = 0;
 	terminal_column = 0;
 	terminal_color = vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK);
@@ -89,5 +105,6 @@ uint32_t vga_write(vfs_node_t* node, uint32_t offset, uint32_t size, uint8_t* bu
 	for (uint32_t i = 0; i < size; i++) {
 		vga_putchar((char)buf[i]);
 	}
+	update_cursor();
 	return size;
 }

kernel/syscall.c

@@ -26,7 +26,6 @@ typedef struct registers {
 static int32_t sys_exit(int status) {
     process_t* task = current_task();
     task->state = STATE_DEAD;
-    kprintf("exiting task %d with status %d\n", task->pid, status);
     exit();
     return 0;
 }