Save disk number

2022-01-27 02:33:27 +05:00 · 2022-01-27 02:33:27 +05:00 · d103eb0c6c
parent 7456e22e21
commit d103eb0c6c
1 changed files with 5 additions and 0 deletions
--- a/src/x86_stage1.S
+++ b/src/x86_stage1.S
@ -7,6 +7,9 @@
 _start:
    ljmp $0, $(start - _start + 0x7c00)

+disk:
+    .byte 0
+
 start:
    cli
    xor %ax, %ax
@ -17,6 +20,8 @@ start:
    mov %ax, %gs
    mov $0x2000, %sp

+    mov %dl, (disk - _start + 0x7c00)
+
    mov $0x02,   %ah
    mov $1,      %al /* Sectors count       */
    mov $0x80,   %dl /* Drive               */