From 66289aa8ecfa07b20bad424eb9860b196641ef52 Mon Sep 17 00:00:00 2001
From: Brett Weiland <brett_weiland@bpcspace.com>
Date: Fri, 19 Mar 2021 10:54:25 -0500
Subject: first commit

---
 src/bootloader/bios_functions/bios_disk.asm | 38 +++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 src/bootloader/bios_functions/bios_disk.asm

(limited to 'src/bootloader/bios_functions/bios_disk.asm')

diff --git a/src/bootloader/bios_functions/bios_disk.asm b/src/bootloader/bios_functions/bios_disk.asm
new file mode 100644
index 0000000..28fc74d
--- /dev/null
+++ b/src/bootloader/bios_functions/bios_disk.asm
@@ -0,0 +1,38 @@
+bios_disk:
+.load_sectors:
+pusha
+mov es, dx
+
+mov ah, 0x02      ; read disc sectors
+mov ch, 0x00      ; track 0
+mov dh, 0x00      ; head 0
+mov dl, [stage0.boot_device]
+
+int 0x13
+
+jc .failed
+
+mov ah, 0
+popa
+ret
+
+.failed:
+
+mov bx, .loadsectors_error
+mov cx, 0
+call bios_print
+
+push 0
+mov al, ah
+mov ah, 0   ; you need to clean up the bios print function!
+push ax
+mov cx, 1
+mov bx, sp
+call bios_print
+
+
+mov ah, 1
+popa
+ret
+
+.loadsectors_error: db "Error loading sectors: ", 0
-- 
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