# The builtin HELP:-
# ------------------
# These commands will be expanded upon later, type HELP<CR> to show these
# commands. Note that the commands are nearly all UPPER CASE ONLY. They are
# paged so just press <CR> to see the next page. So far there are three pages.
#
# <CR> .............................................. Reruns the scan(s) again.
# RUN<CR> ...................... Reruns the scan(s), always with real captures.
# QUIT<CR> OR EXIT<CR>...................................... Quits the program.
# HELP<CR> ............................................. This help as required.
# HOLD<CR> ..................................... Switch to pseudo-storage mode.
# DEMO<CR> ....... Switch capture to default DEMO mode and 10 continuous scans.
# DSP<CR> ................... Switch capture to Linux /dev/dsp mode and 1 scan.
# SOX<CR> .... Switch capture to multi-platform SOund eXchange mode and 1 scan.
# ONE<CR> ...................................... Sets the number of scans to 1.
# TEN<CR> ..................................... Sets the number of scans to 10.
# HUNDRED<CR> .......... Sets the number of scans to 100, (not very practical).
# VER<CR> ............... Displays the version number inside the status window.
# TBVAR<CR> ......... Set up uncalibrated user timebase offset and jump points.
#      SubCommands: ............................. Follow the on screen prompts.
# FASTEST<CR>, SLOWEST<CR> ... Set timebase to the fastest or slowest possible.
# 1mS<CR>, 2mS<CR>, 5mS<CR> ............ Set scanning rate to 1, 2, or 5mS/DIV.
# 10mS<CR>, 20mS<CR>, 50mS<CR> ....... Set scanning rate to 10, 20 or 50mS/DIV.
# 100mS<CR> ................................... Set scanning rate to 100mS/DIV.
# VSHIFT<CR> ........ Set the vertical position from -4 to +4 to the mid-point.
#      SubCommands: ............ Press U or D then <CR> when value is obtained. 
# DRAW<CR> ....... Connect up each vertical plot to give a fully lined display.
# TRIG<CR> ........ Sets the synchronisation methods for storage mode retraces.
#      SubCommand: SYNCEQ<CR> .. Synchronise from a variable, fixed value only.
#      SubCommand: SYNCGT<CR> ......... Synchronise from a positive going edge.
#      SubCommand: SYNCLT<CR> ......... Synchronise from a negative going edge.
#      SubCommand: EXT<CR> ............ SOX ONLY! Follow the on screen prompts.
# SAVEON<CR> ................. Auto-saves EVERY scan with a numerical filename.
# SAVEOFF<CR> ........................... Disables auto-save facility, default.
# ZOOM<CR> ............................. Low signal level gain, ZOOM, facility.
#      SubCommand: 0<CR> ................. Default lowest zoom/gain capability.
#      SubCommand: 1<CR> ............................. X2 zoom/gain capability.
#      SubCommand: 2<CR> ............................. X4 zoom/gain capability.
#      SubCommand: 3<CR> ............................. X8 zoom/gain capability.
#      SubCommand: 4<CR> ............................ X16 zoom/gain capability.
#      SubCommand: <CR> ...... To exit zoom mode when waveform has been viewed.
# HSHIFT<CR> ......... Shift the trace left or right at the highest scan speed.
#      SubCommand: L ........................ Shift the trace left by one byte.
#      SubCommand: l ... Shift the trace left by 64 bytes, (one complete scan).
#      SubCommand: R ....................... Shift the trace right by one byte.
#      SubCommand: r .. Shift the trace right by 64 bytes, (one complete scan).
#      SubCommand: Q or q ........ Exit back to normal usage, (quit this mode).
# RESET<CR> ......................... Do a complete COLD restart of the script.
# FREQ<CR> .. Measure a symmetrical waveform's frequency, accuracy 0.1 percent.
# MODE<CR> Display the X, Y, coupling and mode ranges inside the status window.
# STATUS<CR> . Display the previous status for 3 secs inside the status window.
# LOAD<CR> .................................. Load a binary file for reviewing.
#      SubCommand: ............................... Follow the on screen prompt.
# AC<CR> ......................... Set vertical input to default AC input mode.
# DC<CR> ............................ Attempt to measure DC polarity and level.
# BURST<CR> ........ Play an 8 second sinewave.wav burst using afplay or aplay.
# ARDDET<CR> ................ Detect an Arduino (Diecimila) Board if available.
#      SubCommand: .............................. Follow the on screen prompts.
# ALTDC<CR> ........ Alternate home built DC input device using the sound card.
#      SubCommand: ................................................ UNFINISHED.
# POLARITY<CR> ........... Generate pulse waveforms purely for amplifier tests.
# QTMAC<CR> ........... EXPERIMENTAL MAC, (MBP), QuickTime Player capture mode.
# WINSOUND<CR> ..... Special Windows SoundRecorder.exe for CygWin capture mode.
# ALSA<CR> ................. Special Linux command line, arecord, capture mode.
# SWEEP<CR> .............................. Sweep generator for bandwidth tests.
# SAVE<CR> ............................ Manually save the current scan to disk.
# V<CR> ...... Set the vertical Volts per Division range, (10mV), 100mV to 10V.
#      SubCommand: .............................. Follow the on screen prompts.
#
# !!!Use capture modes QTMAC<CR>, WINSOUND<CR> and ALSA ENTIRELY AT YOUR
# OWN RISK!!!