duskos

commit 902cc0ed86bcc2b369ea9ecd092ac0dc32a2c705
parent 1dab3f145bd77d89c757ba4fbbb6b5db02b663f5
Author: Virgil Dupras <hsoft@hardcoded.net>
Date:   Sun,  6 Nov 2022 14:30:27 -0500

drv/pc/ata: fix timing issue

On real hardware, a wait is necessary at the beginning of _locate or else we
might be sending that command when the drive isn't ready.

Diffstat:
M
fs/drv/pc/ata.fs
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/drv/pc/ata.fs b/fs/drv/pc/ata.fs
@@ -38,7 +38,7 @@ extends Drive struct[ ATADrive
 
   : _locate ( sec drv -- ) >r
     dup 24 rshift $f and $e0 or r@ unit bool 4 lshift or
-    r@ _drvhd pc!
+    r@ _wait r@ _drvhd pc!
     0 r@ _features pc!
     1 r@ _seccnt pc!
     dup $ff and r@ _secno pc!