add checked key to end of queue, and send all keys

ensures that the main loop sends packets for all pending keyboard interactions

command to check keycode now adds to end of virtual key queue

video/vdu_sys.h

@@ -261,7 +261,7 @@ void VDUStreamProcessor::vdu_sys_video() {
 			// Inject an updated virtual key event for a key, forcing a new keycode packet to be sent
 			// NB must use a virtual key here, as we can't convert a keycode to a virtual key
 			auto keyboard = getKeyboard();
-			keyboard->injectVirtualKey((VirtualKey) key, keyboard->isVKDown((VirtualKey) key), true);
+			keyboard->injectVirtualKey((VirtualKey) key, keyboard->isVKDown((VirtualKey) key), false);
 		}	break;
 		case VDP_BUFFER_PRINT: {		// VDU 23, 0, &9B
 			auto bufferId = readWord_t();

video/video.ino

@@ -71,7 +71,7 @@ bool			controlKeys = true;				// Control keys enabled
 #include "vdu_stream_processor.h"
 #include "hexload.h"
 
-std::unique_ptr<fabgl::Terminal>	Terminal;	// Used for CP/M mode
+std::unique_ptr<fabgl::Terminal>	Terminal;	// Used for Terminal emulation mode (for CP/M, etc)
 VDUStreamProcessor *	processor;				// VDU Stream Processor
 
 #include "zdi.h"								// ZDI debugging console
@@ -143,7 +143,7 @@ void do_keyboard() {
 	uint8_t modifiers;
 	uint8_t vk;
 	uint8_t down;
-	if (getKeyboardKey(&keycode, &modifiers, &vk, &down)) {
+	while (getKeyboardKey(&keycode, &modifiers, &vk, &down)) {
 		// Handle some control keys
 		//
 		if (controlKeys && down) {
@@ -313,7 +313,7 @@ bool processTerminal() {
 		case TerminalState::Enabling: {
 			// Turn on the terminal
 			Terminal = std::unique_ptr<fabgl::Terminal>(new fabgl::Terminal());
-			Terminal->begin(_VGAController.get());	
+			Terminal->begin(_VGAController.get());
 			Terminal->connectSerialPort(VDPSerial);
 			Terminal->enableCursor(true);
 			// onVirtualKey is triggered whenever a key is pressed or released