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README.md

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+#Apple 2 HGR BYTE Inspector
+
+Keys:
+
+  ESC   Quit
+  G     Toggle fullscreen
+
+  I     Move cursor up
+  J     Move cursor left
+  K     Move cursor right
+  L     Move cursor down
+
+  ^I    Move cursor to col 0
+  ^J    Move cursor to col 39
+  ^K    Move cursor to row 0
+  ^L    Move cursor to row 191
+  RET   Center cursor
+
+  0..9  "Append" hex nibble to cursor byte
+  A..F
+
+  !     Toggle bit 0
+  @     Toggle bit 1
+  #     Toggle bit 2
+  $     Toggle bit 3
+  %     Toggle bit 4
+  ^     Toggle bit 5
+  &     Toggle bit 6
+  *     Toggle bit 7 (high bit)
+  SPC   Toggle high bit of byte (bit 7)
+  (     Set   byte to $FF (Shift-9)
+  )     Clear byte to $00 (Shift-0)
+  `     Flip all bits
+  ~     Flip all bits
+
+  ,     Shift  byte left  (with zero)
+  .     Shift  byte right (with one )
+  <     Shift  byte left  (with zero)
+  >     Shift  byte right (with one )
+  [     Rotate byte left
+  ]     Rotate byte right
+
+  -     Save cursor byte to temporary
+  =     Set cursor byte from temporary
+
+