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[bugs #509] bad Gate A20 handling

From: Yoshinori K. Okuji
Subject: [bugs #509] bad Gate A20 handling
Date: Tue, 21 Sep 2004 11:52:17 -0400
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040115

This mail is an automated notification from the bugs tracker
 of the project: GNU GRUB.

[bugs #509] Latest Modifications:

Changes by: 
                Yoshinori K. Okuji <address@hidden>
                Tue 09/21/04 at 15:35 (GMT)

            What     | Removed                   | Added
          Resolution | None                      | Fixed
              Status | Open                      | Closed

------------------ Additional Follow-up Comments ----------------------------
I implemented INT 15h support a long time ago, and I hear no bug report on 
this. So I close this bug.

[bugs #509] Full Item Snapshot:

URL: <http://savannah.gnu.org/bugs/?func=detailitem&item_id=509>
Project: GNU GRUB
Submitted by: Yoshinori K. Okuji
On: Fri 05/31/02 at 00:39

Category:  Booting
Severity:  Critical
Priority:  3 - Low
Item Group:  Software Error
Resolution:  Fixed
Privacy:  Public
Assigned to:  okuji
Originator Name:  
Originator Email:  
Status:  Closed
Release:  0.92
Reproducibility:  Every Time
Planned Release:  0.93

Summary:  bad Gate A20 handling

Original Submission:  The current Gate A20 code doesn't work properly in
all systems. See this thread for more information:



Follow-up Comments

Date: Tue 09/21/04 at 15:35         By: Yoshinori K. Okuji <okuji>
I implemented INT 15h support a long time ago, and I hear no bug report on 
this. So I close this bug.

Date: Mon 08/30/04 at 09:28         By: Peter Missel <pmissel>

We're currently prototyping a system mainboard that does not have a KBC, and 
promptly have observed GRUB to run into this issue.

We've been implementing Int15h 240x functions, and could think of an improved 
algorithm in GRUB that makes better use of them - particularly in case the 
system does not have a method of switching the A20 gate at all. This is the 
case in systems that follow the MS "Legacy Free" initiative - A20gate is always 
open, and there's no method of closing it at all.

Please let us know how we can participate in getting GRUB to run on these 


Date: Sun 11/30/03 at 16:47         By: Yoshinori K. Okuji <okuji>
I did some changes on this bug a long time ago, and I have never heard the same 
problem for a while. So I lower the priority, but not closing it, so that I 
wouldn't forget it.


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