From 4d21315f667c03eaf44a580c3435f73853b53dbf Mon Sep 17 00:00:00 2001
From: Elizabeth Alexander Hunt <me@liz.coffee>
Date: Mon, 5 Oct 2026 08:56:38 -0700
Subject: Init

---
 src/boot.asm | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/boot.asm

(limited to 'src/boot.asm')

diff --git a/src/boot.asm b/src/boot.asm
new file mode 100644
index 0000000..cbf57d6
--- /dev/null
+++ b/src/boot.asm
@@ -0,0 +1,31 @@
+;> The Multiboot header must be contained completely within the first 8192 bytes of the OS 
+;> image, and must be longword (32-bit) aligned.
+MULTIBOOT_ALIGN_TO_PAGE:   equ 1 << 0
+MULTIBOOT_MEMORY_DESCRIBE: equ 1 << 2
+MULTIBOOT_MAGIC:           equ 0x1BADB002
+MULTIBOOT_FLAGS:           equ (MULTIBOOT_ALIGN_TO_PAGE | MULTIBOOT_MEMORY_DESCRIBE)
+MULTIBOOT_CHECKSUM:        equ -(MULTIBOOT_MAGIC + MULTIBOOT_FLAGS)
+section .multiboot_header
+align 4
+    dd MULTIBOOT_MAGIC
+    dd MULTIBOOT_FLAGS
+    dd MULTIBOOT_CHECKSUM
+
+STACK_SIZE: equ (1 << 14)
+section .bss
+align 16
+stack_bottom:
+    resb STACK_SIZE
+stack_top:
+
+section .text
+global _start:function (_start.end - _start)
+_start:
+    mov esp, stack_top
+    extern cmain
+    call cmain
+    cli
+
+jmp $
+
+.end:
-- 
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