From 9818f1de981fe9206940cf89e9422388f8853cc2 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sat, 27 Mar 2021 08:38:01 -0700
Subject: .

https://wiki.osdev.org/ATA_PIO_Mode#IDENTIFY_command recommends the straight-and-narrow
way, but the LBA bit shouldn't matter in drive-select during IDENTIFY command,
according to the ATA 3 spec. And it works in Qemu and bochs. It'll slightly
simplify drive parameter management.
---
 boot.subx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boot.subx b/boot.subx
index 31f18380..bc49b49d 100644
--- a/boot.subx
+++ b/boot.subx
@@ -965,7 +965,7 @@ secondary-drive-exists?:  # -> _/eax: boolean
     74/jump-if-= $secondary-drive-exists?:end/disp8
   }
   # identify
-  (ata-drive-select 0xb0)  # primary bus, secondary drive
+  (ata-drive-select 0xf0)  # primary bus, secondary drive
   (ata-sector-count 0)
   (ata-lba 0 0 0)
   (ata-command 0xec)  # identify
-- 
cgit 1.4.1-2-gfad0