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diff --git a/plugins/channel/demoddsd/readme.md b/plugins/channel/demoddsd/readme.md
index 58d63b761..dfec1f4bd 100644
--- a/plugins/channel/demoddsd/readme.md
+++ b/plugins/channel/demoddsd/readme.md
@@ -7,10 +7,10 @@ This plugin uses the [DSDcc](https://github.com/f4exb/dsdcc) library that has be
- DMR/MOTOTRBO: ETSI two slot TDMA standard. MOTOTRBO is a popular implementation of this standard.
- dPMR: Another ETSI standard at slower rate (2400 Baud / 6.25 kHz) and FDMA
- D-Star: developed and promoted by Icom for Amateur Radio customers.
+ - Yaesu System Fusion (YSF): developed and promoted by Yaesu for Amateur Radio customers. Voice full rate with DV serial devices is not supported
It can only detect the following standards (no data, no voice):
- - Yaesu System Fusion (YSF): developed and promoted by Yaesu for Amateur Radio customers.
- NXDN: A joint Icom (IDAS) and Kenwood (Nexedge) standard with 2400 and 4800 Baud versions.
The modulation and standard is automatically detected and switched depending on the Baud rate chosen.
@@ -167,10 +167,26 @@ When the display is active the background turns from the surrounding gray color
These is the standard D-Star embedded information that is read from the header frame.
-19.1.1: Repeater 1 callsign
-19.1.2: Repeater 2 callsign
-19.1.3: Destination (your) callsign
-19.1.4: Origin (my) callsign
+19.1.1: Origin (my) and destination (your) callsign
+
+ - at the left of the `>` sign is the origin callsign with the 4 character informative suffix nest to the slash `/`
+ - at the right of the `>` sign is the destination callsign. As per Icom standard this is `CQCQCQ` when a call is made to all stations
+ - this information is retrieved from the header or the slow data if it can be decoded
+
+19.1.2: Repeater callsign
+
+ - at the left of the `>` sign is the origin repeater or `RPT1`
+ - at the right of the `>` sign is the destination repeater or `RPT2`
+ - this information is retrieved from the header or the slow data if it can be decoded
+
+19.1.3: Informative text
+
+When slow data can be decoded this is the 20 character string that is sent in the text frames
+
+19.1.4: Geopositional data
+
+ - at the left of the colon `:` is the QTH 6 character locator a.k.a. Maidenhead locator
+ - at the right of the colon `:` is the bearing in degrees and distance in kilometers from the location entered in the main window `Preferences\My Position` dialog. The bearing and distance are separated by a slash `/`.
19.2: DMR status display
@@ -262,6 +278,57 @@ Sender's identification code in decimal (24 bits)
Called party's identification code in decimal (24 bits)
+19.4: Yaesu System Fusion (YSF) status display
+
+
+
+19.4.1: FICH data
+
+This displays a summary of FICH (Frame Identification CHannel) block data. From left to right:
+
+ - Frame type:
+ - `H`: header
+ - `C`: channel (as in the example)
+ - `T`: terminator
+ - `S`: test
+
+ - Channel type:
+ - `V1`: voice/data mode 1
+ - `V2`: voice/data mode 2 (as in the example)
+ - `VF`: voice full rate
+ - `DF`: data full rate
+
+ - Call mode:
+ - `GC`: group call (as in the example)
+ - `RI`: radio ID
+ - `RE`: reserved
+ - `IN`: individual call
+
+ - Number of total blocks and number of total frames separated by a colon `:`
+
+ - Miscellaneous information in a single string
+ - First character is the bandwidth mode:
+ - `N`: narrow band mode
+ - `W`: wide band mode (as in the example)
+ - Second character is the path type:
+ - `I`: Internet path
+ - `L`: local path
+ - last three characters are the YSF squelch code (0..127) or dashes `---` if the YSF squelch is not active
+
+19.4.2: Origin and destination callsigns
+
+ - at the left of the `>` sign is the origin callsign
+ - at the right of the `>` sign is the destination callsign. It is filled woth stars `*` when call is made to all stations (as the CQCQCQ in D-Star)
+
+19.4.3: Origin and destination repeaters callsigns
+
+ - at the left of the `>` sign is the origin repeater callsign
+ - at the right of the `>` sign is the destination repeater callsign.
+
+19.4.4: Originator radio ID
+
+This is the unique character string assigned to the device by the manufacturer.
+
20: Discriminator output scope display
20.1 Transitions constellation display
diff --git a/sdrbase/readme.md b/sdrbase/readme.md
index d4fe447b1..b646129df 100644
--- a/sdrbase/readme.md
+++ b/sdrbase/readme.md
@@ -43,7 +43,8 @@ The following items are presented hierarchically from left to right:
- Channels: the channels active for each device
- Preferences:
- Audio: opens a dialog to choose the audio output device
- - DV serial: if you have one or more AMBE3000 serial devices for AMBE digital voice check to connect them. If unchecked DV decoding will resort to mbelib if available else no audio will be produced for AMBE digital voice
+ - DV Serial: if you have one or more AMBE3000 serial devices for AMBE digital voice check to connect them. If unchecked DV decoding will resort to mbelib if available else no audio will be produced for AMBE digital voice
+ - My Position: opens a dialog to enter your station ("My Position") coordinates in decimal degrees with north latitudes positive and east longitudes positive. This is used whenever positional data is to be displayed (APRS, DPRS, ...). For it now only works with D-Star $$CRC frames.
Help:
- Laoded Plugins: shows details about the loaded plugins (see next)
- About: current version and blah blah.