REFORM(1) REFORM(1)
NAME
audio, pm, shortcuts - MNT Reform 2 support utilities
SYNOPSIS
reform/audio [ -1 ] [ -D ] [ -m mountpoint ] [ -s service ]
reform/pm [ -D ] [ -m mountpoint ] [ -s service ]
reform/shortcuts [ -l light_step ] [ -v vol_step ]
DESCRIPTION
These programs provide support for certain functions of MNT
Reform 2 computing device. Some of them also make control-
ling 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 ini-
tialization is performed and the program exits immediately.
The following files are provided by the program:
audioctl
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.
volume
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.
Power and monitoring
pm presents a file system consisting of the following files:
battery
Returns attached battery array statistics in the same
manner as acpi(8).
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REFORM(1) REFORM(1)
cputemp
Exposes the current temperature reading of the CPU.
kbdoled
An uncompressed Plan 9 image can be written to the file
to display on the keyboard OLED. Zero-length write
clears the display.
light
Provides a way to control the backlight of the built-in
LCD by writing lcd [-+]N or kbd [-+]N, where N is
expressed in percentage, either as an absolute value
(0-100) or relative to the current brightness - by pre-
fixing with a sign. Reading light returns the current
brightness.
pmctl
Reading pmctl gives the System Controller firmware ver-
sion 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.
Shortcuts
shortcuts enables LCD brightness and audio volume adjustment
via keyboard shortcuts.
The program uses Rio's kbdtap to function:
reform/shortcuts </dev/kbdtap >/dev/kbdtap
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 "master" volume.
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.
SOURCE
/sys/src/cmd/reform
SEE ALSO
audio(3)
HISTORY
MNT Reform 2 support first appeared in 9front (August,
2022).
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REFORM(1) REFORM(1)
BUGS
Only 44100Hz (default) and 48000Hz sample rates are sup-
ported with audio, recording is not implemented.
Light was chosen as a shorter alternative to brightness.
Current keyboard light level reading is only an indication,
there is no way to get the actual value from the keyboard.
Values displayed in the battery file are not precise, cell
capacities are hardcoded in the System Controller firmware.
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