1 files changed, 94 insertions, 0 deletions
diff --git a/stage2/main.asm b/stage2/main.asm
new file mode 100644
index 0000000..50fee42
--- /dev/null
+++ b/stage2/main.asm
@@ -0,0 +1,94 @@
+[org 0x7E00]
+
+%define PAGETABLE 0x1000
+%define VESAINFO  0x0500
+%define VESAMODE VESAINFO+512
+%define OWNMODE  VESAMODE+256
+%define GFXINFO PAGETABLE-10
+;%define MEMMAPCNT GFXINFO-2
+%define MEMMAP 0x500
+
+setup:
+	; print message
+	mov ebx, .msg
+	call print_str
+
+	; setup VESA
+	call vesa
+
+	; get extended memory map
+	call mmap
+
+	; build page table
+	call paging
+
+	; jump into long mode
+	jmp 0x0008:long_mode
+
+.msg:
+	db 10, 13, "nyax stage2", 10, 13, 0
+
+%include "stage2/vesa.asm"
+%include "stage2/mmap.asm"
+%include "stage2/paging.asm"
+%include "stage1/print.asm"
+
+; modify eax, ebx, ecx, edx
+print_hex:
+	mov ebx, 0x10
+	jmp print_num
+print_dec:
+	mov ebx, 10
+print_num:
+	xor ecx, ecx
+.convert:
+	inc ecx
+	xor edx, edx
+	div ebx
+	cmp dl, 10
+	jb .digit
+	add dl, 'A'-10
+	jmp .next
+.digit:
+	add dl, '0'
+.next:
+	push dx
+	cmp eax, 0
+	jne .convert
+.print:
+	cmp ecx, 0
+	je .return
+	dec ecx
+	pop ax
+	mov ah, 0x0E
+	int 0x10
+	jmp .print
+.return:
+	ret
+
+newline:
+	mov al, 10
+	call print_chr
+
+	mov al, 13
+	call print_chr
+
+	ret
+
+print_chr:
+	mov ah, 0x0E
+	int 0x10
+	ret
+
+[bits 64]
+
+long_mode:
+	; setup segment registers
+	mov ax, 0x0010
+	mov ds, ax
+	mov es, ax
+	mov fs, ax
+	mov gs, ax
+	mov ss, ax
+
+	; kernel begins here