1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/x86/uart.S b/kernel/x86/uart.S
new file mode 100644
index 0000000..416fad2
--- /dev/null
+++ b/kernel/x86/uart.S
@@ -0,0 +1,18 @@
+.section .text
+
+.global outb
+.global inb
+
+# void outb(uint16_t port, uint8_t val)
+outb:
+    mov %dl, %al
+    mov %cx, %dx
+    outb %al, %dx
+    ret
+
+# uint8_t inb(uint16_t port)
+inb:
+    mov %cx, %dx
+    inb %dx, %al
+    ret
+