stage1/hdd: Zero-extend bytes_per_sect to full EBP to fix 32-bit division

2026-02-08 08:59:55 +01:00
parent 963607c6f0
commit 7b6ad6294f
1 changed files with 1 additions and 1 deletions
--- a/stage1/hdd/disk.asm
+++ b/stage1/hdd/disk.asm
@@ -35,7 +35,7 @@ read_sectors:
    mov word [si], 30       ; buf_size
    int 0x13
    jc .done
-    mov bp, word [si+24]    ; bytes_per_sect
+    movzx ebp, word [si+24] ; bytes_per_sect

    ; ECX byte count to CX sector count
    mov ax, cx