From 39da2f46a063adf0f35c23542b5999082736ef9d Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Wed, 19 Oct 2016 12:07:31 -0600
Subject: [PATCH] Fix for bootloader on new BIOS (don't know exactly why
though)
---
x86_64/bootsector.asm | 9 +++++++--
x86_64/print16.asm | 10 ++++------
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/x86_64/bootsector.asm b/x86_64/bootsector.asm
index 11ea087..b66184e 100644
--- a/x86_64/bootsector.asm
+++ b/x86_64/bootsector.asm
@@ -26,8 +26,13 @@ boot: ; dl comes with disk
call print
call print_line
- mov bh, 0
- mov bl, [disk]
+ mov bx, (startup_start - boot) / 512
+ call print_num
+ call print_line
+
+ mov bx, startup_start
+ call print_num
+ call print_line
mov eax, (startup_start - boot) / 512
mov bx, startup_start
diff --git a/x86_64/print16.asm b/x86_64/print16.asm
index c4a04e1..dada0fd 100644
--- a/x86_64/print16.asm
+++ b/x86_64/print16.asm
@@ -2,18 +2,16 @@ SECTION .text
USE16
; provide function for printing in x86 real mode
-
-; a newline
-newline: db 13,10,0
-
; print a string and a newline
; IN
; si: points at zero-terminated String
; CLOBBER
; ax
print_line:
- mov si, newline
- jmp print
+ mov al, 13
+ call print_char
+ mov al, 10
+ jmp print_char
; print a string
; IN
--
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