Caps/Num/Scroll LED states are now displayed

src/device/keyboard.c

@@ -72,9 +72,9 @@ static int keydelay[512];
 #endif
 static scancode *scan_table; /* scancode table for keyboard */
 
-static uint8_t caps_lock   = 0;
-static uint8_t num_lock    = 0;
-static uint8_t scroll_lock = 0;
+static volatile uint8_t caps_lock   = 0;
+static volatile uint8_t num_lock    = 0;
+static volatile uint8_t scroll_lock = 0;
 static uint8_t shift       = 0;
 
 static int key5576mode = 0;
@@ -318,12 +318,15 @@ keyboard_input(int down, uint16_t scan)
                     shift &= ~0x80;
                     break;
                 case 0x03a: /* Caps Lock */
+                    if (!(machine_has_bus(machine, MACHINE_AT) > 0))
                         caps_lock ^= 1;
                     break;
                 case 0x045:
+                    if (!(machine_has_bus(machine, MACHINE_AT) > 0))
                         num_lock ^= 1;
                     break;
                 case 0x046:
+                    if (!(machine_has_bus(machine, MACHINE_AT) > 0))
                         scroll_lock ^= 1;
                     break;
 

src/device/keyboard_at.c

@@ -3476,6 +3476,7 @@ keyboard_at_bat(void *priv)
 
         keyboard_scan = 1;
 
+        keyboard_update_states(0, 0, 0);
         kbc_at_dev_queue_add(dev, 0xaa, 0);
     } else {
         bat_counter--;
@@ -3510,6 +3511,7 @@ keyboard_at_write(void *priv)
         switch (dev->command) {
             case 0xed: /* Set/reset LEDs */
                 kbc_at_dev_queue_add(dev, 0xfa, 0);
+                keyboard_update_states(!!(val & 0x4), !!(val & 0x2), val & 0x1);
                 keyboard_at_log("%s: Set/reset LEDs [%02X]\n", dev->name, val);
                 break;
 
@@ -3762,6 +3764,7 @@ keyboard_at_init(const device_t *info)
 
     if (dev->port != NULL) {
         kbc_at_dev_reset(dev, 0);
+        keyboard_update_states(0, 0, 0);
         bat_counter = 0x0000;
     }
 

src/qt/qt_mainwindow.cpp

@@ -184,6 +184,32 @@ MainWindow::MainWindow(QWidget *parent)
     ui->menuEGA_S_VGA_settings->menuAction()->setMenuRole(QAction::NoRole);
     ui->stackedWidget->setMouseTracking(true);
     statusBar()->setVisible(!hide_status_bar);
+
+    num_label = new QLabel;
+    num_label->setText(" NUM ");
+    statusBar()->addPermanentWidget(num_label);
+
+    scroll_label = new QLabel;
+    scroll_label->setText(" SCRL ");
+    statusBar()->addPermanentWidget(scroll_label);
+
+    caps_label = new QLabel;
+    caps_label->setText(" CAPS ");
+    statusBar()->addPermanentWidget(caps_label);
+
+    QTimer* ledKeyboardTimer = new QTimer(this);
+    ledKeyboardTimer->setTimerType(Qt::CoarseTimer);
+    ledKeyboardTimer->setInterval(1);
+    connect(ledKeyboardTimer, &QTimer::timeout, this, [this] () {
+        uint8_t caps, num, scroll;
+        keyboard_get_states(&caps, &num, &scroll);
+        
+        num_label->setStyleSheet(num ? "QLabel { background: green; }" : "");
+        caps_label->setStyleSheet(caps ? "QLabel { background: green; }" : "");
+        scroll_label->setStyleSheet(scroll ? "QLabel { background: green; }" : "");
+    });
+    ledKeyboardTimer->start();
+
 #ifdef Q_OS_WINDOWS
     util::setWin11RoundedCorners(this->winId(), (hide_status_bar ? false : true));
 #endif
@@ -211,6 +237,9 @@ MainWindow::MainWindow(QWidget *parent)
 
     connect(this, &MainWindow::hardResetCompleted, this, [this]() {
         ui->actionMCA_devices->setVisible(machine_has_bus(machine, MACHINE_BUS_MCA));
+        num_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
+        scroll_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
+        caps_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
         while (QApplication::overrideCursor())
             QApplication::restoreOverrideCursor();
 #ifdef USE_WACOM
@@ -1306,6 +1335,10 @@ MainWindow::refreshMediaMenu()
     status->refresh(ui->statusbar);
     ui->actionMCA_devices->setVisible(machine_has_bus(machine, MACHINE_BUS_MCA));
     ui->actionACPI_Shutdown->setEnabled(!!acpi_enabled);
+
+    num_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
+    scroll_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
+    caps_label->setVisible(machine_has_bus(machine, MACHINE_AT) > 0);
 }
 
 void

src/qt/qt_mainwindow.hpp

@@ -5,6 +5,7 @@
 #include <QLabel>
 #include <QEvent>
 #include <QFocusEvent>
+#include <QLabel>
 
 #include <memory>
 #include <array>
@@ -184,6 +185,8 @@ private:
     friend class RendererStack; // For UI variable access by non-primary renderer windows.
     friend class WindowsRawInputFilter; // Needed to reload renderers on style sheet changes.
 
+    QLabel *caps_label, *scroll_label, *num_label;
+
     
     bool isShowMessage = false;
 };