Added int printing to serial module.

kernel/arch/i386/serial.nim

@@ -22,5 +22,40 @@ proc write*(input: char) =
 proc write*(input: string) =
   for i in 0 .. input.len - 1:
     write(input[i])
-  write('\L')
 
+var parsedData: array[0..9, char]
+
+proc write*(data: SomeSignedInt) =
+  if(data == 0):
+    write('0')
+    return
+  var input = data
+  var i = 0
+  if(input < 0):
+    write('-')
+    input = input * -1
+  while(input != 0):
+    let parsedChar: char = char(48 + (input mod 10))
+    parsedData[i] = parsedChar
+    i = i + 1
+    input = input div 10
+  while i > 0:
+    i = i - 1
+    write(parsedData[i])
+
+proc write*(data: SomeUnsignedInt) =
+  if(data == 0):
+    write('0')
+    return
+  var input = data
+  var i = 0
+  while(input != 0):
+    let parsedChar: char = char(48'u + (input mod 10))
+    parsedData[i] = parsedChar
+    i = i + 1
+    input = input div 10
+  while i > 0:
+    i = i - 1
+    write(parsedData[i])
+
+proc newLine*() = write('\L')

kernel/kernel.nim

@@ -5,9 +5,9 @@ import tty, gdt, irq, serial
 
 proc kernelMain() {.exportc: "kernel_main"}=
   serial.init()
-  serial.write("Booting OS")
+  serial.write("Booting OS\L")
   gdt.gdtInstall()
-  serial.write("GDT installed")
+  serial.write("GDT installed\L")
   terminalInitialize()
   terminalWrite("Hello World!\L")
   terminalWrite("MAX_INT:")