From 14fcc32d790f19f02e24b3393952af4bcd9890e5 Mon Sep 17 00:00:00 2001
From: Xnoe <xnoe@xnoe.moe>
Date: Sun, 29 Aug 2021 21:50:27 +0100
Subject: [PATCH] Added interrupt handler

---
 hello.asm  | 26 +++++---------------------
 kernel.asm | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 22 deletions(-)

diff --git a/hello.asm b/hello.asm
index c4b3cd1..cbbca8b 100644
--- a/hello.asm
+++ b/hello.asm
@@ -2,28 +2,12 @@ mov ax, 3000h
 mov ds, ax
 
 push hello_world_str
-call print
-
-;jmp $
+mov ah, 01h
+int 22h
 
 retf
 
-; print(str)
-print:
-  push bp
-  mov bp, sp
-  mov si, [bp + 4]
-  mov ah, 0eh
-  mov cx, 1
-  mov bh, 0
-print_loop:
-  lodsb
-  cmp al, 0
-  je print_exit
-  int 10h
-  jmp print_loop
-print_exit:
-  pop bp
-  ret 2
+hello_world_str db "Hello, World!", 13, 10, 13, 10, 0
 
-hello_world_str db "Hello, World!", 13, 10, 13, 10, 0
\ No newline at end of file
+buffer:
+  times 32 db 0
\ No newline at end of file
diff --git a/kernel.asm b/kernel.asm
index 4b904d6..d8048a3 100644
--- a/kernel.asm
+++ b/kernel.asm
@@ -1,9 +1,16 @@
 [BITS 16]
+  ; Update the IVT with our interrupt handler
+  mov bx, 0
+  mov ds, bx
+  mov word [ds:136], ihdlr
+  mov word [ds:138], cs
+
   mov ax, 2000h
   mov ds, ax
 
   pop ax
   mov byte [bootdisk], al
+
   ; Set up kernel specifics
 
   ; Root Directory Entries will be at 2000h:2000h
@@ -364,4 +371,28 @@ decode_filename_final:
   ret 2
 
 _decode_buffer:
-  times 11 db 0
\ No newline at end of file
+  times 11 db 0
+
+ihdlr:
+  pop word [_ihdlr_stack0]
+  pop word [_ihdlr_stack1]
+  pop word [_ihdlr_stack2]
+
+  cmp ah, 01h
+  jne _ihdlr_2
+  call print
+_ihdlr_2:
+  cmp ah, 02h
+  jne _ihdlr_3
+  call readline
+_ihdlr_3:
+  
+
+  push word [_ihdlr_stack2]
+  push word [_ihdlr_stack1]
+  push word [_ihdlr_stack0]
+  iret
+
+_ihdlr_stack0 dw 0
+_ihdlr_stack1 dw 0
+_ihdlr_stack2 dw 0
\ No newline at end of file