Rigol MHO900 firmware mod v0.1.4 (BW 1.25 GHz)

Changes in v0.0.1:

• Unlocked all options.
• Unlocked bandwidth 1 GHz (for all MHO900 models).
• Added bandwidth manual settings (separately for each channel): 350 MHz, 500 MHz, 800 MHz.
• Optimizations.
• Minimum time base changed to 200 ps.

Changes in v0.1:

• .GEL (installation from USB flashdrive) build and Posix script as in the DHO800/900 mod (system performance changes and Android desktop by Nova launcher with basic apps).
• Added UPA option (power analysis).
• Changed AFG sine wave max frequency limit up to 350 MHz.
• Changed AFG square wave max frequency limit up to 250 MHz.
• Changed AFG arbitrary and predefined wave max frequency limit up to 250 MHz.
• Changed AFG ramp wave max frequency limit up to 50 MHz.
• Code optimizations (lower CPU usage, faster UI and more wfm/s).
• hdcode number (/dev/hdcode_gpio) app reads only once and it's cached.
• "TestModel" hardcoded (gives advanced settings and more features).
• "image header" (model name added to screenshots) disabled by default.
• Removed app screen borders.
• Removed windows vertical margins.
• Changed windows (waveform, XY, math, etc) background from dark gray to black.
  Increased space for shortcuts.
• Increased margin between vertical elements in bottom bar (normal mode).
• Changed background of botom bar in full screen mode from light gray to black.
  Fixed some translations.
• Removed code loading gif in the app bootsplash, because sometimes it triggered bug in the "Flutter", which caused app crash.
• Fixed random Androidx lib crash caused by loading unavailable class View$OnUnhandledKeyEventListener.
• Changed Rigol launcher to the same as in the DHO800/900 mod (optimized and modified).
• Instant (first) reboot after upgrade from .GEL file.

Changes in v0.1.1:

• Quick fix of the waveform cache lock (caused issues with start/stop on CH1).
  

Changes in v0.1.2:

• Quick fix of DC offset in analog channels which appeared in most cases when impedance was 1 MΩ and bandwidth limit was set to 800 MHz or OFF. Fix realized by limiting maximum allowed bandwidth to 500 MHz whenever impedance is set to 1 MΩ. Caused by wrong flags being sent to AFE chip (stock app does the same limit with same conditions in slightly different way). With impedance 50 Ω maximum bandwidth is unchanged (1 GHz).
• Removed code which in some rare cases can prevent from changing bandwidth.
• Optimizations.

Changes in v0.1.2-1:

• .GEL quick fix of very rare issue with resulted in boot loop for 3 people: removed unnecessary pdf files and FairEmail (email app) to save space in /rigol FS, which prevents from no free space left in this FS ("partition").
• Fix bug in Rigol Launcher (app working in the background), which may cause fatal error in some conditions.

Changes in v0.1.3 (not released in public):

• Increased max bandwidth to ~1.25 GHz for 50 Ω and 800 MHz for 1 MΩ.
• New bandwidth options: 5 MHz, 20 MHz, 250 MHz, 800 MHz, 1 GHz (only for 50 Ω), OFF (as above).
• Black & white top and bottom bar.
• Changed buttons background to more darker color.
• Moved start/stop shortcut to the top/left corner of the screen (status text is now also a button).
• Changed popup windows background color from light gray to dark gray.
• Increased text size in shortcuts.
• Changed AFG sin frequency limit to 100 MHz.

Changes in v0.1.4:

• Disabled FPGA low pass digital filtering for most of the settings.
• Tuned AFE input filter for 1 MΩ impedance.
• Reduced size of the main screen tags.
• Fixed layout of the advanced XY settings window.
• FPGA updated to Rigol 00.01.00.00.25.