add comments to args passed to vbr

2025-09-11 17:06:35 -04:00
parent 75d77e92e1
commit 3da2af2d2d
1 changed files with 3 additions and 3 deletions
--- a/src/mbr/mbr.nasm
+++ b/src/mbr/mbr.nasm
@@ -146,9 +146,9 @@ main:
        call kmemcpy                            ; copy partition table to bss
        add sp, 0x6
        
-        mov si, word [bp - 4]
-        mov dl, byte [bp - 2]
-        mov bx, partition_table
+        mov si, word [bp - 4]                   ; partition_offset address
+        mov dl, byte [bp - 2]                   ; pass drive # from BIOS to VBR in dl
+        mov bx, partition_table                 ; partition_table address
        jmp word 0x0000:VBR_ENTRY

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