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New terminal outputs using serial: morse and spkmodem.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-01-16 20:39:54 +01:00
parent 34f71cb866
commit b78d6c32e3
10 changed files with 512 additions and 132 deletions
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24
docs/grub.texi
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@ -1229,9 +1229,9 @@ Select the terminal input device. You may select multiple devices here,
separated by spaces.
Valid terminal input names depend on the platform, but may include
@samp{console} (PC BIOS and EFI consoles), @samp{serial} (serial terminal),
@samp{ofconsole} (Open Firmware console), @samp{at_keyboard} (PC AT
keyboard, mainly useful with Coreboot), or @samp{usb_keyboard} (USB keyboard
@samp{console} (native platform console), @samp{serial} (serial terminal),
@samp{serial_<port>} (serial terminal with explicit port selection),
@samp{at_keyboard} (PC AT keyboard), or @samp{usb_keyboard} (USB keyboard
using the HID Boot Protocol, for cases where the firmware does not handle
this).
@ -1242,9 +1242,21 @@ Select the terminal output device. You may select multiple devices here,
separated by spaces.
Valid terminal output names depend on the platform, but may include
@samp{console} (PC BIOS and EFI consoles), @samp{serial} (serial terminal),
@samp{gfxterm} (graphics-mode output), @samp{ofconsole} (Open Firmware
console), or @samp{vga_text} (VGA text output, mainly useful with Coreboot).
@samp{console} (native platform console), @samp{serial} (serial terminal),
@samp{serial_<port>} (serial terminal with explicit port selection),
@samp{gfxterm} (graphics-mode output), @samp{vga_text} (VGA text output),
@samp{mda_text} (MDA text output), @samp{morse} (Morse-coding using system
beeper) or @samp{spkmodem} (simple data protocol using system speaker).
@samp{spkmodem} is useful when no serial port is available. Connect the output
of sending system (where GRUB is running) to line-in of receiving system
(usually developper machine).
On receiving system compile @samp{spkmodem-recv} from
@samp{util/spkmodem-recv.c} and run:
@example
parecord --channels=1 --rate=48000 --format=s16le | ./spkmodem-recv
@end example
The default is to use the platform's native terminal output.