Displaying 4 results from an estimated 4 matches for "gatea20".
2015 Oct 05
3
Measuring boot time
...'ve found out that it takes for the bootloader and OS an extra 1 second to load when keyboard is disconnected.I got from the BIOS engineer the following explanation and steps to take:
In syslinux make sure that it doesn?t use the KBC at all. KBC functions will timeout when a KBC is not present. GATEA20 (address line A20 wrap around 8086 compatibility gate) must not be controlled by KBC as first option. No menu stuff or something needing keyboard should be used.
The GATEA20 should be enabled as follows:
1) Test if A20 is already enabled. If enabled goto 7.
2) Do BIOS int 0x15 function 0x2401 to...
2015 Oct 05
0
Measuring boot time
...akes for the bootloader and OS an extra 1 second to load when
> keyboard is disconnected.I got from the BIOS engineer the following
> explanation and steps to take:
> In syslinux make sure that it doesn???t use the KBC at all.
> KBC functions will timeout when a KBC is not present.
> GATEA20 (address line A20 wrap around 8086 compatibility gate) must
> not be controlled by KBC as first option. No menu stuff or something
> needing keyboard should be used.
>
> The GATEA20 should be enabled as follows:
>
> 1) Test if A20 is already enabled. If enabled goto 7.
> 2) D...
2015 Oct 10
0
Measuring boot time
...ond to load when
>>> keyboard is disconnected.I got from the BIOS engineer the following
>>> explanation and steps to take:
>
>>> In syslinux make sure that it doesn???t use the KBC at all.
>>> KBC functions will timeout when a KBC is not present.
>>> GATEA20 (address line A20 wrap around 8086 compatibility gate) must
>>> not be controlled by KBC as first option. No menu stuff or something
>>> needing keyboard should be used.
>
> This makes a lot of sense. Systems without a keyboard and/or keyboard
> controller are relatively...
2015 Jul 18
3
Measuring boot time
Hi Gene
It took me some time to check all the things you've asked.
Hope you still remember the case...
1) Compiling SYSLINUX with -j1 didn't help.
The first error message I get is about missing header file.
I'll try to play a little bit with it to make it compile.
2) The 3-character mode that the version/copyright banner displays is EDD.
What determines the it? BIOS?
What affect