basic os stuff

2026-03-02 17:37:33 -05:00
commit e6231d46f2
7 changed files with 342 additions and 0 deletions
--- a/entry.asm
+++ b/entry.asm
@@ -0,0 +1,28 @@
+[BITS 16]
+
+
+
+extern _kmain
+
+global kernel_entry
+global _small_code_             ; Watcom small model expects this
+
+segment _TEXT class=CODE
+
+_small_code_:                   ; Must be at start of CODE segment
+kernel_entry:
+    cli
+    mov ax, 0x1000
+    mov ds, ax
+    mov es, ax
+    mov ss, ax
+    mov sp, 0x7000              ; Just use a fixed address for stack
+    xor bp, bp
+    sti
+    call _kmain
+.halt:
+cli
+hlt
+jmp .halt
+segment _BSS class=BSS
+    resb 4096