1 files changed, 41 insertions, 0 deletions
diff --git a/boot.asm b/boot.asm
new file mode 100644
index 0000000..66009e8
--- /dev/null
+++ b/boot.asm
@@ -0,0 +1,41 @@
+bits 32
+
+section .text
+    align 4
+    dd 0x1BADB002
+    dd 0x00
+    dd - (0x1BADB002 + 0x00)
+
+global start
+extern kmain
+
+start:
+    cli
+    mov esp, stack_top
+    call marker_begin
+    call kmain
+    call marker_done
+.hltloop:
+    hlt
+jmp .hltloop
+
+marker_begin:
+    mov word [VIDEO_RAM + CONSOLE_SIZE - 2], \
+                0x4F << 8 | 'B' ; END OF MAIN MARKER
+    ret
+
+marker_done:
+    mov word [VIDEO_RAM + CONSOLE_SIZE - 2], \
+                0x4F << 8 | 'H' ; END OF MAIN MARKER
+    ret
+
+section .data
+
+%include 'constants.asm'
+
+section .bss
+align 4
+stack_bottom:
+    resb 8192
+stack_top:
+EOK: