diff --git a/Makefile b/Makefile
index 33d69be..1e50876 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ all: build/kernel-i386.elf
 clean:
 	-@rm *.bin 2> /dev/null || true
 
-start32.bin: src/*
+start32.bin: src/start32.asm src/serial.asm
 	fasm src/start32.asm start32.bin
 image: start32.bin mount
 	cp start32.bin mnt/koalemos/
diff --git a/src/itoa.asm b/src/itoa.asm
deleted file mode 100644
index 914b214..0000000
--- a/src/itoa.asm
+++ /dev/null
@@ -1,98 +0,0 @@
-;; Modified from: https://gist.github.com/SplittyDev/8e728627012e57ac0deac196660014fb
-
-;
-; Routine to convert a 32-bit integer to a string.
-; Registers are preserved.
-;
-; EAX: Source integer
-; EBX: Target address
-; ECX: Base
-;
-; Internal register layout:
-; start:
-; EAX: Source integer
-; ECX: Target address
-; EDX: Base
-; checknegative:
-; EAX: Source integer
-; EBX: Target address (original)
-; ECX: Target address (active)
-; divrem:
-; EAX: Source integer
-; ECX: Target address (active)
-; EDX: Base / Result
-; reverse:
-; EBX: Target address (original)
-; ECX: Target address (active)
-; EDX: Target address (temporary)
-;
-__uitoa:
-.start:
-	push ebp
-	mov ebp, esp
-
-	push eax
-	push ebx
-	push ecx
-	push edx
-
-	mov eax, [ebp+8]
-	mov ecx, [ebp+12]
-	mov ebx, [ebp+16]
-
-	mov edx, ecx
-	mov ecx, ebx
-;.checknegative:
-;    test eax, eax
-;    jns .divrem
-;    mov byte [ecx], 0x2D
-;    inc ecx
-;    mov ebx, ecx
-;    neg eax
-.divrem:
-	push edx
-	push ecx
-	mov ecx, edx
-	xor edx, edx
-	div ecx
-	mov byte dl, [__itoacvt + edx]
-	pop ecx
-	mov byte [ecx], dl
-	pop edx
-	inc ecx
-	cmp eax, 0x00
-	jne .divrem
-	mov byte [ecx], 0x00
-	dec ecx
-.reverse:
-	cmp ebx, ecx
-	jge .end
-	mov byte dl, [ebx]
-	mov byte al, [ecx]
-	mov byte [ebx], al
-	mov byte [ecx], dl
-	inc ebx
-	dec ecx
-	jmp .reverse
-.end:
-	pop edx
-	pop ecx
-	pop ebx
-	pop eax
-
-	pop ebp
-	ret
-
-;
-; Conversion table for __itoa.
-; Works for bases [2 ... 36].
-;
-__itoacvt:
-	db '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-
-;
-; Buffer to store the result of __itoa in.
-;
-align 64
-__itoabuf32:
-	rb 36
diff --git a/src/mbootinfo.asm b/src/mbootinfo.asm
deleted file mode 100644
index a12504a..0000000
--- a/src/mbootinfo.asm
+++ /dev/null
@@ -1,118 +0,0 @@
-mbootgetinfo:
-	push ebp
-	mov ebp, esp
-	push ebx
-	push esi
-	push edi
-	cld
-
-	mov eax, [ebp+8]
-	cmp eax, 0x2badb002
-	jne mbootnomagic
-
-	mov ebx, [ebp+12]
-	mov eax, [ebx]
-	mov [mbootinfo.flags], eax
-
-	;; Get memoryinformation
-	test eax, 1b
-	jz mbootnomeminfo
-	mov eax, [ebx+4]
-	mov [mbootinfo.mem_lower], eax
-	mov eax, [ebx+8]
-	mov [mbootinfo.mem_upper], eax
-
-	;; Get videoinformation
-	test [mbootinfo.flags], (1 shl 02)
-	jz mbootnovideoinfo
-
-	mov esi, ebx
-	add esi, 88
-	mov eax, [esi]
-	mov [mbootinfo.fb_addr], eax
-	add esi, 8
-
-	mov eax, [esi]
-	mov [mbootinfo.fb_pitch], eax
-	add esi, 4
-
-	mov eax, [esi]
-	mov [mbootinfo.fb_width], eax
-	add esi, 4
-
-	mov eax, [esi]
-	mov [mbootinfo.fb_height], eax
-	add esi, 4
-
-	mov al, [esi]
-	cmp al, 32
-	je .bppokay
-	cmp al, 24
-	je .bppokay
-	jmp mbootunsupportedfbbpp
-.bppokay:
-	mov [mbootinfo.fb_bpp], al
-	inc esi
-
-	mov al, [esi]
-	cmp al, 1
-	jne mbootunsupportedfbtype
-	mov [mbootinfo.fb_type], al
-	inc esi
-
-	;; r/g/b positions and masks
-	mov ecx, 6
-	mov edi, mbootinfo.fb_rpos
-	rep movsb
-
-.done:
-	pop edi
-	pop esi
-	pop ebx
-	pop ebp
-	ret
-
-
-mbootnomagic:
-	push .msg
-	call serialwrite
-	jmp hang
-.msg db "No multiboot magic!", 10, 0
-mbootnomeminfo:
-	push .msg
-	call serialwrite
-	jmp hang
-.msg db "No memoryinfo!", 10, 0
-mbootnovideoinfo:
-	push .msg
-	call serialwrite
-	jmp hang
-.msg db "No videoryinfo!", 10, 0
-mbootunsupportedfbtype:
-	push .msg
-	call serialwrite
-	jmp hang
-.msg db "Unsupported framebuffer type: only direct RGB is supported!", 10, 0
-mbootunsupportedfbbpp:
-	push .msg
-	call serialwrite
-	jmp hang
-.msg db "Unsupported bitdepth: only 24 and 32 bpp supported!", 10, 0
-
-
-mbootinfo:
-	.flags dd 0
-	.mem_lower dd 0
-	.mem_upper dd 0
-	.fb_addr dd 0
-	.fb_pitch dd 0
-	.fb_width dd 0
-	.fb_height dd 0
-	.fb_bpp db 0
-	.fb_type db 0
-	.fb_rpos db 0
-	.fb_rmasksize db 0
-	.fb_gpos db 0
-	.fb_gmasksize db 0
-	.fb_bpos db 0
-	.fb_bmasksize db 0
diff --git a/src/serial.asm b/src/serial.asm
index 39293ec..4f6585e 100644
--- a/src/serial.asm
+++ b/src/serial.asm
@@ -1,8 +1,7 @@
 SERIAL_PORT equ 0x3f8
-serialinitialized db 0
 
 serialinit:
-	push ax
+	pushad
 
 	;Disable ints
 	mov dx, SERIAL_PORT+1
@@ -47,44 +46,21 @@ serialinit:
 	out dx, al
 	in al, dx
 	cmp al, 0xae
-	je .noerror
-.error:
-	push esi
-	push edi
-	push ax
-	mov esi, .errormsg
-	mov edi, 0xb8000
-	mov ah, 64
-	cld
-.errorloop:
-	lodsb
-	or al, al
-	jz .errordone
-	stosw
-	jmp .errorloop
-.errordone:
-	pop ax
-	pop edi
-	pop esi
-	jmp .end
-.noerror:
-	mov [serialinitialized], 1
+	jne serialiniterror
+
+
 	;; Set serial to normal operation
 	mov dx, SERIAL_PORT+4
 	mov al, 0x0f
 	out dx, al
-.end:
-	pop ax
+
+	popad
 	ret
-.errormsg db "Serial init failed", 0
 
 serialwrite:
-	cmp [serialinitialized], 0
-	je .notinitialized
 	push ebp
 	mov ebp, esp
-	push esi
-	push ax
+	pushad
 	cld
 	mov esi, [ebp+8]
 .loop:
@@ -100,9 +76,22 @@ serialwrite:
 	out dx, al
 	jmp .loop
 .done:
-	pop ax
-	pop esi
+	popad
 	pop ebp
 	ret
-.notinitialized:
+
+serialiniterror:
+	mov esi, .msg
+	mov edi, 0xb8000
+	mov ah, 64
+	cld
+.loop:
+	lodsb
+	or al, al
+	jz .done
+	stosw
+	jmp .loop
+.done:
+	popad
 	ret
+.msg db "Serial init failed", 0
diff --git a/src/start32.asm b/src/start32.asm
index 9eb28a9..fc19dc0 100644
--- a/src/start32.asm
+++ b/src/start32.asm
@@ -5,7 +5,7 @@ org 0x100000
 MULTIBOOT_HEADER_MAGIC      equ 0x1BADB002
 MULTIBOOT_PAGE_ALIGN        equ (1 shl 0)
 MULTIBOOT_MEMORY_INFO       equ (1 shl 1)
-MULTIBOOT_VIDEO_REQUEST     equ (1 shl 2)
+MULTIBOOT_VIDEO_REQUEST     equ (0 shl 2)
 MULTIBOOT_AOUT_KLUDGE       equ (1 shl 16)
 MULTIBOOT_HEADER_FLAGS      equ MULTIBOOT_PAGE_ALIGN or MULTIBOOT_MEMORY_INFO or MULTIBOOT_VIDEO_REQUEST
 MULTIBOOT_HEADER_FLAGS      equ MULTIBOOT_PAGE_ALIGN or MULTIBOOT_MEMORY_INFO or MULTIBOOT_VIDEO_REQUEST or MULTIBOOT_AOUT_KLUDGE
@@ -27,98 +27,68 @@ multiboot:
 
 start:
 	; Setup stack
-	mov ebp, stack_top
+	mov ebp, stack_bottom
 	mov esp, stack_top
 
 	push ebx
 	push eax
 
-	call serialinit
+	cmp eax, 0x2badb002
+	jne multibootnomagic
+
+	mov byte [0xb8000], '!'
+
 	push stuff.bootmsg
+	call printbootmsg
+	call serialinit
 	call serialwrite
 	add esp, 4
 
-	call mbootgetinfo
-	add esp, 2*4
-
-	mov eax, [mbootinfo.fb_addr]
-	mov dword [eax], 0xffffffff
-
-
-	push stuff.fbaddrmsgpfx
-	call serialwrite
-	add esp, 4
-
-	sub esp, 36	;Reserve stack for return
-	push dword esp	;Destination address
-	push dword 16	;Base
-	push dword [mbootinfo.fb_addr]	;source
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-
-	push stuff.fbdimensionsmsgpfx
-	call serialwrite
-	add esp, 4
-	push dword esp	;destination address
-	push dword 10	;base
-	push dword [mbootinfo.fb_width]
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-	push stuff.x
-	call serialwrite
-	add esp, 4
-
-	push dword esp	;destination address
-	push dword 10	;base
-	push dword [mbootinfo.fb_height]
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-	push stuff.x
-	call serialwrite
-
-	add esp, 4
-	push dword esp	;destination address
-	push dword 10	;base
-	xor eax, eax
-	mov al, [mbootinfo.fb_bpp]
-	push dword eax
-	call __uitoa
-	add esp, 3*4
-	push esp
-	call serialwrite
-	add esp, 4
-
-	add esp, 36	;Clean reserved uitoa return string from stack
-
 	jmp hang
 
 hang:
-	push .msg
-	call serialwrite
 	cli
-.loop:
 	hlt
+	jmp hang
+
+multibootnomagic:
+	mov esi, .msg
+	mov edi, 0xb8000
+	mov ah, 64
+	cld
+.loop:
+	lodsb
+	or al, al
+	jz .done
+	stosw
 	jmp .loop
-.msg db 10, "Halting...", 10, 0
+.done:
+	jmp hang
+.msg db "No multiboot magic", 0
+
+printbootmsg:
+	push ebp
+	mov ebp, esp
+	pushad
+	mov esi, [ebp+8]
+	mov edi, 0xb8000
+	cld
+.loop:
+	lodsb
+	or al, al
+	jz .done
+	stosb
+	inc edi
+	jmp .loop
+.done:
+	popad
+	pop ebp
+	ret
 
 include "src/serial.asm"
-include "src/mbootinfo.asm"
-include "src/itoa.asm"
 
 stuff:
-	.bootmsg db 10, "=== KoalemOS ===", 10, 0
-	.fbaddrmsgpfx db 10, "Framebuffer address: 0x", 0
-	.fbdimensionsmsgpfx db 10, "Framebuffer dimensions: ", 0
-	.x db "x", 0
+	.bootmsg db "=== KoalemOS ===", 10, 0
 
 
 stack_bottom: