Fixed two legacy SDL key handling issues.

- Scroll lock release now works again (Formerly used as fullscreen toggle).
- Attempt to fix Pause / Ctrl+Break key handling (possibly SDL issue).

bochs/gui/sdl.cc

@@ -189,7 +189,13 @@ static Bit32u sdl_sym_to_bx_key(SDLKey sym)
  case SDLK_BACKSPACE: return BX_KEY_BACKSPACE;
  case SDLK_TAB: return BX_KEY_TAB;
  case SDLK_RETURN: return BX_KEY_ENTER;
- case SDLK_PAUSE: return BX_KEY_PAUSE;
+ case SDLK_PAUSE:
+ if (bx_gui->get_modifier_keys() & BX_MOD_KEY_CTRL) {
+ return BX_KEY_CTRL_BREAK;
+ } else {
+ return BX_KEY_PAUSE;
+ }
+ break;
  case SDLK_ESCAPE: return BX_KEY_ESC;
  case SDLK_SPACE: return BX_KEY_SPACE;
  case SDLK_QUOTE: return BX_KEY_SINGLE_QUOTE;
@@ -305,7 +311,7 @@ static Bit32u sdl_sym_to_bx_key(SDLKey sym)
 
 /* Miscellaneous function keys */
  case SDLK_PRINT: return BX_KEY_PRINT;
- case SDLK_BREAK: return BX_KEY_PAUSE;
+ case SDLK_BREAK: return BX_KEY_CTRL_BREAK;
  case SDLK_MENU: return BX_KEY_MENU;
 
  default:
@@ -900,10 +906,8 @@ void bx_sdl_gui_c::handle_events(void)
  mouse_toggle_check(BX_MT_KEY_F12, 0);
  }
 
- // filter out release of Windows/Fullscreen toggle and unsupported keys
- if ((sdl_event.key.keysym.sym != SDLK_SCROLLOCK)
- && (sdl_event.key.keysym.sym < SDLK_LAST))
- {
+ // filter out release of unsupported keys
+ if (sdl_event.key.keysym.sym < SDLK_LAST) {
  // convert sym->bochs code
  if (!SIM->get_param_bool(BXPN_KBD_USEMAPPING)->get()) {
  key_event = sdl_sym_to_bx_key(sdl_event.key.keysym.sym);