On 30.08.2007 06:19, ron minnich wrote: > On 8/29/07, Carl-Daniel Hailfinger <[EMAIL PROTECTED]> wrote: >> I'd say it should accept a lar archive via serial console, perhaps using >> ymodem, and start executing the first member of the lar. >> >> A bit more detailed: If the BIOS fails to verify its checksum, it >> outputs a message telling you about it over serial, waits for signature >> to arrive over serial (a standard char sequence with repetitions at the >> beginning), reads until it has one complete signature, switches serial >> to ymodem and accepts a lar archive. The first member of the lar is then >> executed. >> >> The "wait for signature" is there to allow people to use multiple tries >> getting serial speed right. OTOH, if the code outputs a continuous >> stream of "TESTTEXT\n" while waiting for serial input, the other side >> can verify serial speed settings as well. >> >> What do you think? > > That's the way to go.
Can we invert the speaker line each time a byte is written out over serial? With 115200,8,N,1 we would get an inversion frequency of 11.52kHz and a tone frequency of 5.76kHz. Comparing that tone to some downloadable audio sample would allow people to find out if serial was driven with the right speed. Regards, Carl-Daniel -- linuxbios mailing list linuxbios@linuxbios.org http://www.linuxbios.org/mailman/listinfo/linuxbios
