Dear paavaanan_...@dell.com, In message <d5a6f3355f664c40afb65bb1277d8d450193b22...@maax7mcdc101.apac.dell.com> you wrote: > > To stop autoboot we have 2 ifdef (CONFIG_AUTOBOOT_STOP_ [STR2 || > STR1] ). Which is very easy and straightforward to implement. Halting > a boot with single "Keystroke" is having its own advantages to the > user. But, why multiple key support is ignored say like [ctrl + > anykey ] combination. Especially, BIOS vendors prefer at least > simultaneous pressing of 2 or more keys to halt the boot. Any > specific reasons to avoid this. Other than simplicity is there any > specific reason to stick on this.
BIOSes and BIOS compatible extension cards (say, PCI controllers) are usually a major PITA when you are not working in an environment where you have a real keyboard attached. We're dealing with embedded devices here, and often we have only communication paths like a serial port (eventually even over a modem line), or netconsole. Have you ever tried to transmit some "ALT + some_key" control sequences over a serial port? > I mean why simultaneous two key press support is avoided and > implemented a secondary bootstopkey to halt the boot say like > CONFIG_AUTOBOOT_STOP_STR2. This is done because usually we do not have a real keyboard. So anything that cannot be mapped into the standard ASCII character set cannot be used here. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Any fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction. - Albert Einstein _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
