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These programs provide support for certain functions of MNT Reform
2 computing device. Some of them also make controlling file systems
available under /dev.
Audio
audio initializes the DAC (Digital–to–Analog Converter) on the platform
and provides a standard audio(3) interface to control volume and
other parameters. With –1 only the initialization is performed
and the program exits immediately.
The following files are provided by the program:
audioctl
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Shows the current status (on or off ) of the three "outputs" – master,
hp and spk. Each can be enabled, disabled or toggled, by writing
a single line to the same file, consisting of the output name
and the desired action – on , off or toggle , accordingly.
DAC can be reinitialized by writing a single reset.
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volume
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Provides an interface for volume control (see audio(3)). For ease
of use, volume supports relative adjustments by prefixing a number
with a sign. master +1, for example, will increase the volume
on master by 1%, which is 0.5dB for this particular output. For
hp and spk one percent is 1dB.
Enhanced stereo separation can be enabled by writing 3d, followed
by desired percentage of the effect.
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Power and monitoring
pm presents a file system consisting of the following files:
battery
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Returns attached battery array statistics in the same manner as
acpi(8).
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cputemp
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Exposes the current temperature reading of the CPU.
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kbdoled
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An uncompressed Plan 9 image can be written to the file to display
on the keyboard OLED. Zero–length write clears the display.
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light
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Provides a way to control the backlight of the built–in LCD by
writing lcd [–+]N, kbd [–+]N, or tb N N N N N, where N is expressed
in percentage, either as an absolute value (0–100) or relative
to the current brightness – by prefixing with a sign. For the trackball
(tb) only 0 and 1 are valid values. Reading light
returns the current brightness.
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pmctl
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Reading pmctl gives the System Controller firmware version string,
voltage (mV) of each cell and current(mA) of the battery array.
Writing power off to pmctl will turn off all power rails, which
is what fshalt(8) does after halting the file systems.
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Shortcuts
shortcuts enables LCD brightness and audio volume adjustment via
keyboard shortcuts.
The program uses Rio's kbdtap to function:
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reform/shortcuts </dev/kbdtap >/dev/kbdtap
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Hyper+F1/F2 decreases/increases LCD brightness, Hyper+F7/F8/F9
skips to the previous track, (un)pauses or skips to the next track
in zuke(1), Hyper+F10 (un)mutes the audio, Hyper+F11/F12 decreases/increases
"mix" volume, or "master" if former isn't available. Optionally, a
single step amount can be set with –l for
LCD light level (default is 5) and –v for volume (default is 3).
Values can be negative to essentially swap the decrement and increment
keys.
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