[Bug #763] serial input escape sequence recognition issues

[nobody]

=================== BUG #763: LATEST MODIFICATIONS ==================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=763&group_id=68

Changes by: Yoshinori K. Okuji <address@hidden>
Date: 2002-Jul-02 23:44 (GMT)

------------------ Additional Follow-up Comments ----------------------------
I've modified the logic a bit. Could you try?

BTW, the reason why I don't want to incorporate your patch
is not because of the size. Rather, I didn't like the
previous implementation, because it waited for at most
two seconds. That was really irritating. So I'm attempting
to add a delay, as short as possible.

Okuji



=================== BUG #763: FULL BUG SNAPSHOT ===================


Submitted by: ilgiz                     Project: grub                           
Submitted on: 2002-Jun-27 05:14
Category:  Terminal                     Severity:  Ordinary                     
Priority:  Normal                       Bug Group:  Action Request              
Resolution:  None                       Assigned to:  okuji                     
Status:  Open                           Release:  2002-06-26                    
Reproducibility:  Intermittent          Planned Release:  0.93                  

Summary:  serial input escape sequence recognition issues

Original Submission:  a) The serial input escape sequence recognition delay 
depends
on CPU speed.

b) The sequence translation is not invoked on each character read.
This means the eascape recognition delay will slow down alphanumeric
input.

A patch that restores the original behavior of the serial input 
mechanism is attached.


Follow-up Comments
*******************

-------------------------------------------------------
Date: 2002-Jul-02 23:44             By: okuji
I've modified the logic a bit. Could you try?

BTW, the reason why I don't want to incorporate your patch
is not because of the size. Rather, I didn't like the
previous implementation, because it waited for at most
two seconds. That was really irritating. So I'm attempting
to add a delay, as short as possible.

Okuji

-------------------------------------------------------
Date: 2002-Jul-02 16:38             By: ilgiz

All my difficulties were due to my own attempt to restore the wait escape 
sequence policy which existed before terminal code streamlining.

However, when I reverted my patch I found that after holding an arrow key in 
the command line for few seconds I was brought into the boot entry selection 
menu.  I think that could be due to the wait loop being too fast.  Will the 
115200 bps rate produce intervals of hundreds microseconds?  And what if I use 
a slower bit rate?

On reapplying my patch the problem has gone.  The patch may not be efficient in 
terms of amount of code.  It adds 96 bytes to stage2.


-------------------------------------------------------
Date: 2002-Jun-29 20:57             By: okuji
Could you tell me what difficulty you have?
I thought the delay would be at most some microseconds,
even on an old 386 box.

Thanks,
Okuji


File Attachments
****************

-------------------------------------------------------
Date: 2002-Jun-27 05:14  Name: grub-serial-escape.diff  Size: 3KB   By: ilgiz
a patch for better (former) serial input escape sequence recognition
http://savannah.gnu.org/bugs/download.php?group_id=68&bug_id=763&bug_file_id=44


For detailed info, follow this link:
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=763&group_id=68