X-Git-Url: http://git.dujemihanovic.xyz/posts?a=blobdiff_plain;f=boot.s;h=51be5d92dd8ee19426be4092d2aaed2c1e96f46d;hb=85d77ed5b53a1bd5642985ca7c6e563c58c98fa1;hp=76880b009eded1d15e93792478061d121a920859;hpb=f9f4f8ebffb463d53ae5a239ddfbe8380f258b8b;p=nameless-os.git

diff --git a/boot.s b/boot.s
index 76880b0..51be5d9 100644
--- a/boot.s
+++ b/boot.s
@@ -1,16 +1,69 @@
 	bits 16 ; boot sectors run in real mode
 	org 7c00h ; boot sector is loaded at 0x7c00
 
+_start
+	mov di, printing_numbers
+	call print
+
+	or bl, 1
 	mov dx, 0DEADh ; number to print
-	mov cl, 0 ; column
-	mov ch, 0 ; row
 	call print_word
+	
+	mov di, space
+	call print
+	
+	xor bl, bl
 	mov dx, 0BEEFh
-	mov cl, 0
-	mov ch, 1
 	call print_word
 
-	jmp $
+	mov di, waiting
+	call print
+
+	mov di, keystroke
+	mov bl, 1
+
+.loop
+	mov ah, 0
+	int 16h
+	cmp ah, 1Ch
+	je .enterpressed
+	jmp .continue
+	cmp ah, 0Eh
+	je .backspace
+	jmp .continue
+.enterpressed
+	pusha
+	mov ah, 0Eh
+	mov al, 0Dh
+	int 10h
+	mov al, 0Ah
+	int 10h
+	popa
+	jmp .loop
+.backspace
+	pusha
+	mov ah, 03h
+	mov bh, 0
+	int 10h
+	dec dl
+	mov ah, 02h
+	int 10h
+	mov ah, 0Eh
+	mov al, ' '
+	int 10h
+	mov ah, 02h
+	int 10h
+	popa
+	jmp .loop
+.continue
+	mov [keystroke], al
+	call print
+	jmp .loop
+
+printing_numbers db "Printing some random hex numbers", 0
+waiting db "I await keystrokes", 0
+keystroke db "$", 0
+space db " ", 0
 
 %include "print.s"