Merge pull request #1094 from zoltanvb/b2-update

Update B2 docs with BBC Master emulation

Author: fpscan

docs/image/core/b2/bbc-master-keyboard.png

@@ -4,7 +4,7 @@
 
 ## Background
 
-Emulate the BBC Micro, a series of microcomputers designed and built by Acorn Computers Limited in the 1980s for the Computer Literacy Project of the BBC.
+Emulate the BBC Micro and Master, a series of microcomputers designed and built by Acorn Computers Limited in the 1980s for the Computer Literacy Project of the BBC.
 
 The b2-libretro core has been authored by:
 
@@ -79,20 +79,22 @@ Load any supported content file. Content type will be autodetected, and if possi
 - If disk image name does not contain such indication, Shift key press will be simulated during boot to trigger autoboot function
 
 In case of multi-disk games, use the Disk Control menu to add the subsequent images and switch between them.
+For BBC Master games, set emulated machine type to Master, and close the core, then re-open again with the content.
 
 ## Core options
 
 The b2 core has the following option(s) that can be tweaked from the core options menu.
 
 - Emulated machine
-  - `B/Acorn 1770`
-  - `B/Watford 1770 (DDB2)`
-  - `B/Watford 1770 (DDB3)`
-  - `B/Opus 1770`
-  - `B/Opus CHALLENGER 256K`
-  - `B/Opus CHALLENGER 512K`
-  - `B+`
-  - `B+128`
+    - `B/Acorn 1770`
+    - `B/Watford 1770 (DDB2)`
+    - `B/Watford 1770 (DDB3)`
+    - `B/Opus 1770`
+    - `B/Opus CHALLENGER 256K`
+    - `B/Opus CHALLENGER 512K`
+    - `B+`
+    - `B+128`
+    - `Master 128 (MOS 3.20)`
 - Autoboot (on|off)
 - Keyboard assignments for each RetroPad button
 
@@ -104,8 +106,8 @@ Joypad is fully assignable to keyboard keys in core options.
 
 ## Keyboard
 
-Keyboard layout of the BBC Micro:
-![](../image/core/b2/bbc-micro-keyboard.png)
+Keyboard layout of the BBC Master (BBC Micro is the same, apart from cursor key arrangement and the lack of keypad):
+![](../image/core/b2/bbc-master-keyboard.png)
 
 Most mappings are straightforward positionally from an ISO UK keyboard:
 
@@ -115,11 +117,11 @@ Most mappings are straightforward positionally from an ISO UK keyboard:
 - Red: extra mapping
 - Dark grey: keys intentionally reserved for RetroArch / OS functions
 
-![](../image/core/b2/iso-mapping-for-bbc-micro.png)
+![](../image/core/b2/iso-mapping-for-bbc-master.png)
 
 Exceptions are marked in the following table:
 
-| RetroKeyboard Inputs         | BBC Micro keyboard input  |
+| RetroKeyboard Inputs         | BBC Micro/Master keyboard input |
 |------------------------------|---------------------------|
 | Keyboard F10                 | f0                        |
 | Keyboard F11                 | Break                     |
@@ -140,6 +142,11 @@ Exceptions are marked in the following table:
 | Keyboard PgDn                | Shift Lock                |
 | Keyboard NumLock             | Shift Lock                |
 | Keyboard Insert              | Copy                      |
+| --- (no PC keyboard mapping) | Numpad , (comma)          |
+| --- (no PC keyboard mapping) | Numpad #                  |
+| --- (no PC keyboard mapping) | Numpad Delete             |
+
+If there is a need to press those 3 keys that have no mapping, use core options to map them to a RetroPad button.
 
 ## External Links