Added assembly for reading/writing to IO locations.

kernel/arch/i386/io.nim

@@ -0,0 +1,16 @@
+type
+  IOPacket* = tuple
+    port: uint16
+    value: uint8
+
+{.push stackTrace:off.}
+proc outb*(data: IOPacket) =
+  asm """
+    outb `data.value` `data.port`
+  """
+
+proc inb*(port: uint16): uint =
+  asm """
+    inb `port` `result`
+  """
+{.pop.}