From 986cf9b89690bb11f453fc617fac005f98483912 Mon Sep 17 00:00:00 2001
From: Andrea Odetti <mariofutire@gmail.com>
Date: Tue, 15 Dec 2020 17:37:21 +0000
Subject: [PATCH] Make size of hi-res for applen work on Pi3.

Signed-off-by: Andrea Odetti <mariofutire@gmail.com>
---
 linux.md                           | 14 ++++++++------
 source/frontends/ncurses/world.cpp |  8 ++++----
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/linux.md b/linux.md
index 4afe0ea3..b6902fee 100644
--- a/linux.md
+++ b/linux.md
@@ -59,14 +59,16 @@ Frontend based on ncurses, with a ASCII art graphic mode.
 
 Keyboard shortcuts
 
-* F2: terminate emulator
-* F12: Load Snapshot
-* ALT-RIGHT: wider hi res graphis
-* ALT-LEFT: narrower hi res graphics
-* ALT-UP: vertical hi res (smaller)
-* ALT-DOWN: vertical hires (bigger)
+* ``F2``: reset the machine
+* ``F3``: terminate the emulator
+* ``F11``, ``F12``: Save, Load Snapshot
+* ``ALT-RIGHT``: wider hi res graphis
+* ``ALT-LEFT``: narrower hi res graphics
+* ``ALT-UP``: vertical hi res (smaller)
+* ``ALT-DOWN``: vertical hires (bigger)
 
 In order to properly appreciate the wider hi res graphics, open a big terminal window and choose a small font size.
+Try ``CTRL-`` as well if ``ALT--` does not work: terminals do not report a consistent keycode for these combinations.
 
 The joystick uses evdev (currently the device name is hardcoded).
 
diff --git a/source/frontends/ncurses/world.cpp b/source/frontends/ncurses/world.cpp
index d1800487..29ce9b0e 100644
--- a/source/frontends/ncurses/world.cpp
+++ b/source/frontends/ncurses/world.cpp
@@ -467,16 +467,16 @@ int ProcessKeyboard()
   case 0x14a: // DEL
     ch = 0x7f;
     break;
-  case 544: // ALT - LEFT (Ctrl would be 546)
+  case 543 ... 546: // Various values for Ctrl/Alt - Left on Ubuntu and Pi OS
     asciiArt->changeColumns(-1);
     break;
-  case 559: // ALT - RIGHT (561)
+  case 558 ... 561: // Ctrl/Alt - Right
     asciiArt->changeColumns(+1);
     break;
-  case 565: // ALT - UP (567)
+  case 564 ... 567: // Ctrl/Alt - Up
     asciiArt->changeRows(-1);
     break;
-  case 524: // ALT - DOWN (526)
+  case 523 ... 526: // Ctrl/Alt - Down
     asciiArt->changeRows(+1);
     break;
   default: