From 3009fc4d4ea33d3d6e29d5b1877c6d21c3db3c47 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Thu, 26 Aug 2021 18:33:54 +0000
Subject: x86/boot/bootsect: load the kernel at a new address

---
 arch/x86/boot/bootsect.s | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch')

diff --git a/arch/x86/boot/bootsect.s b/arch/x86/boot/bootsect.s
index 5932445..3410131 100644
--- a/arch/x86/boot/bootsect.s
+++ b/arch/x86/boot/bootsect.s
@@ -8,6 +8,7 @@
 .set CODESEG, gdt_code - gdt_start
 .set DATASEG, gdt_data - gdt_start
 
+.set SYSSEG, 0x1000				# Historical load address
 .set MAGIC, 0xAA55
 
 .section .text.bootentry		# Code that will start executing at
@@ -38,7 +39,7 @@ load_kernel:					# Load our kernel
 	mov $0x02, %cl				# Select sector 2 (next after the
 								# boot sector) [has a base of 1]
 	mov $0x01, %al				# Read 1 sectors
-	mov $0x9000, %bx			# Load sectors to ES:BS (0x9000)
+	mov $SYSSEG, %bx			# Load sectors to ES:BX (0:$SYSSEG)
 	int $0x13					# Start reading from drive
 	jc disk_error				# If carry flag set, bios failed to read
 
-- 
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