M devices/terminal.c → devices/terminal.c

@@ -1,11 +1,65 @@ 
 #include <stdio.h>
 #include "../xyw.h"
 
+#ifndef _WIN32
+#include <termios.h>
+#include <unistd.h>
+
+static struct termios terminal_orig_termios;
+static int terminal_raw_mode_active = 0;
+#endif
+
 /* terminal device */
 #define TERMINAL_INPUT 0x0
 #define TERMINAL_OUTPUT 0x1
 #define TERMINAL_ON_KEYPRESS 0x2
 #define TERMINAL_ON_ARGUMENT 0x4
+
+void terminal_init(xyw_byte *data)
+{
+    (void)data;
+#ifndef _WIN32
+    struct termios raw;
+
+    if (!isatty(STDIN_FILENO))
+    {
+        // Not a real terminal (e.g. piped input/tests) — nothing to save or set
+        return;
+    }
+
+    if (tcgetattr(STDIN_FILENO, &terminal_orig_termios) != 0)
+    {
+        XYW_DBG("terminal: tcgetattr failed, raw mode not enabled\n");
+        return;
+    }
+
+    raw = terminal_orig_termios;
+    raw.c_lflag &= ~(ICANON | ECHO | ISIG);
+    // Read returns as soon as 1 byte is available, no inter-byte timeout
+    raw.c_cc[VMIN] = 1;
+    raw.c_cc[VTIME] = 0;
+
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) != 0)
+    {
+        XYW_DBG("terminal: tcsetattr failed, raw mode not enabled\n");
+        return;
+    }
+
+    terminal_raw_mode_active = 1;
+#endif
+}
+
+void terminal_teardown(xyw_byte *data)
+{
+    (void)data;
+#ifndef _WIN32
+    if (terminal_raw_mode_active)
+    {
+        tcsetattr(STDIN_FILENO, TCSAFLUSH, &terminal_orig_termios);
+        terminal_raw_mode_active = 0;
+    }
+#endif
+}
 
 void terminal_output(xyw_byte *data, xyw_byte addr, xyw_byte *error)
 {

M devices/terminal.h → devices/terminal.h

@@ -1,4 +1,6 @@ 
 #include "../xyw.h"
 
+void terminal_init(xyw_byte *data);
 void terminal_output(xyw_byte *data, xyw_byte addr, xyw_byte *error);
 xyw_byte terminal_input(xyw_byte *data, xyw_byte addr, xyw_byte *error);
+void terminal_teardown(xyw_byte *data);

M xywrun.c → xywrun.c

@@ -368,7 +368,7 @@ xyw_device xyw_devices[XYW_TOTAL_DEVICES] = {
     // System device (not implemented yet)
     {&xyw_memory[0xff00], system_setup, system_input, 0, 0},
     // Terminal device
-    {&xyw_memory[0xff10], 0, terminal_input, terminal_output, 0},
+    {&xyw_memory[0xff10], 0, terminal_input, terminal_output, terminal_teardown},
     // Clock device
     {&xyw_memory[0xff20], clock_setup, clock_input, clock_output, 0},
     // File device