Differences

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--- digic8:registers [2022/02/20 14:53] – [LV peaking (Highlights / zebra)] kitor
+++ digic8:registers [2022/02/20 16:35] – [LV peaking (Highlights / zebra)] kitor
@@ Line 27: / Line 27: @@
 ^ Address        ^ Output  ^ Type      ^ Controls what?      ^
-| ''0xD0300520'' | HDMI    | overexpo  | enable / disable    |
+| ''0xD0300520'' | HDMI    | zebra     | enable / disable    |
-| ''0xD0300550'' | HDMI    | underexpo | enable / disable    |
 | ''0xD0300750'' | HDMI    | overexpo  | threshold and style |
 | ''0xD0300754'' | HDMI    | overexpo  | color               |
 | ''0xD0300758'' | HDMI    | underexpo | threshold and style |
 | ''0xD030075C'' | HDMI    | underexpo | color               |
-| ''0xD0304220'' | LCD/EVF | overexpo  | enable / disable    |
+| ''0xD0304220'' | LCD/EVF | zebra     | enable / disable    |
-| ''0xD0304250'' | LCD/EVF | underexpo | enable / disable    |
 | ''0xD0304488'' | LCD/EVF | overexpo  | threshold and style |
 | ''0xD030448C'' | LCD/EVF | overexpo  | color               |
@@ Line 42: / Line 40: @@
 Registers used by ''DispVram'' State object to control overexposure highlighting feature.
-HDMI registers don't work as for now. Threshold/color registers accepts values as expected. Enable/disable is ignored.
+===Note on HDMI registers===
+Directly poking HDMI enable doesn't work. There's something running in DryOS that constantly overwrites this register with value saved in runtime.
-When observed in Play menu (with stock overexpo warning enabled), enable register changes as expected. So there's a piece of puzzle still missing.
+On R180.739 I was able to follow xrefs to that register, and found a function that writes them - on R180.739 source value is stored in `b054`. If you apply the rules but write value to `b054` instead of register - it will get updated and zebras displayed on HDMI.
-Code suggests there are more registers:
+__It is possible to have independent zebras configured on LCD and HDMI while running in Clean HDMI mode!__
-^ Output  ^ Reg       ^ Addresses                 ^ Range   ^
-| HDMI(?) | Enable    | ''0xD0300520 + 0x30 * n'' | n∈⟨0,7⟩ |
-| HDMI(?) | Threshold | ''0xD0300750 + 0x8  * n'' | n∈⟨0,5⟩ |
-| HDMI(?) | Color     | ''0xD0300754 + 0x8  * n'' | n∈⟨0,5⟩ |
-| LCD(?)  | Enable    | ''0xD0304220 + 0x30 * n'' | n∈⟨0,7⟩ |
-| LCD(?)  | Threshold | ''0xD0304488 + 0x8  * n'' | n∈⟨0,5⟩ |
-| LCD(?)  | Color     | ''0xD030448C + 0x8  * n'' | n∈⟨0,5⟩ |
-For ''n > 1'' there's no visible difference.
-For ''n > 1'' Threshold registers accept both thresholds at the same time, but since those have no observed effects on displayed image - meaning is unknown.
 ===Enable register===
@@ Line 93: / Line 80: @@
 Controls color of highlight overlays. ''??YYUUVV'' format. Canon code defaults to black (''00008080'')
+===More registers===
+Code suggests there are more registers:
+^ Output ^ Reg       ^ Addresses                 ^ Range   ^
+| HDMI   | Enable    | ''0xD0300520 + 0x30 * n'' | n∈⟨0,7⟩ |
+| LCD    | Enable    | ''0xD0304220 + 0x30 * n'' | n∈⟨0,7⟩ |
+| HDMI   | Threshold | ''0xD0300750 + 0x8  * m'' | m∈⟨0,5⟩ |
+| HDMI   | Color     | ''0xD0300754 + 0x8  * m'' | m∈⟨0,5⟩ |
+| LCD    | Threshold | ''0xD0304488 + 0x8  * m'' | m∈⟨0,5⟩ |
+| LCD    | Color     | ''0xD030448C + 0x8  * m'' | m∈⟨0,5⟩ |
+n values above 0 and m values above 1 are not understood. There's no visible difference on screen.
+For ''m > 1'' Threshold registers accept both under and overexposure thresholds at the same time, but since those have no visible effects on displayed image - meaning is unknown.
+Guess: maybe ''m > 1'' are in use for 10 bit / HDR mode?
 ==== Audio ====