diff --git a/targets/mega65/configdb.c b/targets/mega65/configdb.c
index 68aab4fc..47d4f709 100644
--- a/targets/mega65/configdb.c
+++ b/targets/mega65/configdb.c
@@ -54,6 +54,7 @@ static const struct xemutools_configdef_str_st str_options[] = {
 	{ "prg",	NULL, "Load a PRG file directly into the memory (/w C64/65 auto-detection on load address)", &configdb.prg },
 	{ "sdimg",	SDCARD_NAME, "Override path of SD-image to be used (also see the -virtsd option!)", &configdb.sdimg },
 	{ "dumpmem",	NULL, "Save memory content on exit", &configdb.dumpmem },
+	{ "dumpscreen",	NULL, "Save screen content (ASCII) on exit", &configdb.dumpscreen },
 #ifdef XEMU_SNAPSHOT_SUPPORT
 	{ "snapload",	NULL, "Load a snapshot from the given file", &configdb.snapload },
 	{ "snapsave",	NULL, "Save a snapshot into the given file before Xemu would exit", &configdb.snapsave },
@@ -75,6 +76,8 @@ static const struct xemutools_configdef_str_st str_options[] = {
 };
 
 static const struct xemutools_configdef_switch_st switch_options[] = {
+	{ "headless", "Run in headless mode (for testing!)", &emu_is_headless },
+	{ "sleepless", "Use maximum emulation speed (for testing!)", &emu_is_sleepless },
 	{ "cpusinglestep", "Force CPU emulation to do single step emulation (slower!)", &configdb.cpusinglestep },
 	{ "hdosvirt", "Virtualize HDOS file access functions, but via only traps", &configdb.hdosvirt },
 	{ "driveled", "Render drive LED at the top right corner of the screen", &configdb.show_drive_led },
diff --git a/targets/mega65/configdb.h b/targets/mega65/configdb.h
index ac42c825..843f0b05 100644
--- a/targets/mega65/configdb.h
+++ b/targets/mega65/configdb.h
@@ -50,6 +50,7 @@ struct configdb_st {
 	char	*prg;
 	char	*sdimg;
 	char	*dumpmem;
+	char	*dumpscreen;
 #ifdef XEMU_SNAPSHOT_SUPPORT
 	char	*snapload;
 	char	*snapsave;
diff --git a/targets/mega65/inject.c b/targets/mega65/inject.c
index c3231e64..18dd6424 100644
--- a/targets/mega65/inject.c
+++ b/targets/mega65/inject.c
@@ -1,6 +1,6 @@
 /* A work-in-progess MEGA65 (Commodore 65 clone origins) emulator
    Part of the Xemu project, please visit: https://github.com/lgblgblgb/xemu
-   Copyright (C)2016-2021 LGB (Gábor Lénárt) <lgblgblgb@gmail.com>
+   Copyright (C)2016-2022 LGB (Gábor Lénárt) <lgblgblgb@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,7 +16,6 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
-
 #include "xemu/emutools.h"
 #include "inject.h"
 #include "xemu/emutools_files.h"
@@ -42,16 +41,6 @@ static struct {
 static Uint8 *under_ready_p;
 
 
-static XEMU_INLINE int get_screen_width ( void )
-{
-	// C65 $D031.7 VIC-III:H640 Enable C64 640 horizontal pixels / 80 column mode
-	// Used to determine if C64 or C65 "power-on" screen
-	// TODO: this should be revised in the future, as MEGA65 can other means have
-	// different screens!!!
-	return (vic_registers[0x31] & 0x80) ? 80 : 40;
-}
-
-
 static void _cbm_screen_write ( Uint8 *p, const char *s )
 {
 	while (*s) {
@@ -81,7 +70,7 @@ static void prg_inject_callback ( void *unused )
 	fdc_allow_disk_access(FDC_ALLOW_DISK_ACCESS);
 	memcpy(main_ram + prg.load_addr, prg.stream, prg.size);
 	clear_emu_events();	// clear keyboard & co state, ie for C64 mode, probably had MEGA key pressed still
-	CBM_SCREEN_PRINTF(under_ready_p - get_screen_width() + 7, "<$%04X-$%04X,%d bytes>", prg.load_addr, prg.load_addr + prg.size - 1, prg.size);
+	CBM_SCREEN_PRINTF(under_ready_p - vic4_query_screen_width() + 7, "<$%04X-$%04X,%d bytes>", prg.load_addr, prg.load_addr + prg.size - 1, prg.size);
 	if (prg.run_it) {
 		// We must modify BASIC pointers ... Important to know the C64/C65 differences!
 		if (prg.c64_mode) {
@@ -96,7 +85,7 @@ static void prg_inject_callback ( void *unused )
 		// If program was detected as BASIC (by load-addr) we want to auto-RUN it
 		CBM_SCREEN_PRINTF(under_ready_p, " ?\"@\":RUN:");
 		KBD_PRESS_KEY(0x01);	// press RETURN
-		under_ready_p[get_screen_width()] = 0x20;	// be sure no "@" (screen code 0) at the trigger position
+		under_ready_p[vic4_query_screen_width()] = 0x20;	// be sure no "@" (screen code 0) at the trigger position
 		inject_ready_check_status = 100;	// go into special mode, to see "@" character printed by PRINT, to release RETURN by that trigger
 	} else {
 		// In this case we DO NOT press RETURN for user, as maybe the SYS addr is different, or user does not want this at all!
@@ -214,15 +203,14 @@ static const Uint8 ready_msg[] = { 0x12, 0x05, 0x01, 0x04, 0x19, 0x2E };	// "REA
 
 static int is_ready_on_screen ( void )
 {
-	int width = get_screen_width();
-	// TODO: this should be revised in the future, as MEGA65 can other means have
-	// different screen starting addresses, and not even dependent on the 40/80 column mode!!!
-	int start = (width == 80) ? 2048 : 1024;
+	const int width = vic4_query_screen_width();
+	const int height = vic4_query_screen_height();
+	Uint8 *start = vic4_query_screen_memory();
 	// Check every lines of the screen (not the "0th" line, because we need "READY." in the previous line!)
 	// NOTE: I cannot rely on exact position as different ROMs can have different line position for the "READY." text!
-	for (int i = 1; i < 23; i++) {
+	for (int i = 1; i < height - 2; i++) {
 		// We need this pointer later, to "fake" a command on the screen
-		under_ready_p = main_ram + start + i * width;
+		under_ready_p = start + i * width;
 		// 0XA0 -> cursor is shown, and the READY. in the previous line
 		if (*under_ready_p == 0xA0 && !memcmp(under_ready_p - width, ready_msg, sizeof ready_msg))
 			return 1;
@@ -242,7 +230,7 @@ void inject_ready_check_do ( void )
 		// This is used to check the @ char printed by our tricky RUN line to see it's time to release RETURN (or just simply clear all the keyboard)
 		// Also check for 'READY.' if it's still there, run program running maybe cleared the screen and we'll miss '@'!
 		// TODO: this logic is too error-proon! Consider for some timing only, ie wait some frames after virtually pressing RETURN then release it.
-		int width = get_screen_width();
+		int width = vic4_query_screen_width();
 		if (under_ready_p[width] == 0x00 || memcmp(under_ready_p - width, ready_msg, sizeof ready_msg)) {
 			inject_ready_check_status = 0;
 			clear_emu_events();		// reset keyboard state & co
diff --git a/targets/mega65/inject.h b/targets/mega65/inject.h
index dc92c5d8..2744cf44 100644
--- a/targets/mega65/inject.h
+++ b/targets/mega65/inject.h
@@ -1,6 +1,6 @@
 /* A work-in-progess MEGA65 (Commodore-65 clone origins) emulator
    Part of the Xemu project, please visit: https://github.com/lgblgblgb/xemu
-   Copyright (C)2016-2021 LGB (Gábor Lénárt) <lgblgblgb@gmail.com>
+   Copyright (C)2016-2022 LGB (Gábor Lénárt) <lgblgblgb@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/targets/mega65/mega65.c b/targets/mega65/mega65.c
index b4e9b6ef..d8356d7c 100644
--- a/targets/mega65/mega65.c
+++ b/targets/mega65/mega65.c
@@ -435,6 +435,23 @@ int dump_memory ( const char *fn )
 }
 
 
+int dump_screen ( const char *fn )
+{
+	if (!fn || !*fn)
+		return 0;
+	char *text = vic4_textshot();
+	int retcode = 1;
+	if (text) {
+		if (*text)
+			retcode = xemu_save_file(fn, text, strlen(text), "Cannot dump ASCII screen content into file");
+		else
+			retcode = 0;
+	}
+	free(text);
+	return retcode;
+}
+
+
 static void shutdown_callback ( void )
 {
 	// Write out NVRAM if changed!
@@ -454,6 +471,7 @@ static void shutdown_callback ( void )
 	cia_dump_state (&cia2);
 #if !defined(XEMU_ARCH_HTML)
 	(void)dump_memory(configdb.dumpmem);
+	(void)dump_screen(configdb.dumpscreen);
 #endif
 #ifdef HAS_UARTMON_SUPPORT
 	uartmon_close();
diff --git a/targets/mega65/mega65.h b/targets/mega65/mega65.h
index ae47ac0e..2ec75c30 100644
--- a/targets/mega65/mega65.h
+++ b/targets/mega65/mega65.h
@@ -69,6 +69,7 @@ extern int  reset_mega65_asked( void );
 extern void reset_mega65_cpu_only ( void );
 
 extern int  dump_memory       ( const char *fn );
+extern int  dump_screen       ( const char *fn );
 
 extern int registered_screenshot_request;
 extern Uint8 last_dd00_bits;
diff --git a/targets/mega65/ui.c b/targets/mega65/ui.c
index 3002962d..899717f3 100644
--- a/targets/mega65/ui.c
+++ b/targets/mega65/ui.c
@@ -33,7 +33,6 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 //#include "xemu/f011_core.h"
 #include "dma65.h"
 #include "memory_mapper.h"
-#include "xemu/basic_text.h"
 #include "audio65.h"
 #include "vic4.h"
 #include "configdb.h"
@@ -533,16 +532,8 @@ static void ui_emu_info ( void )
 
 static void ui_put_screen_text_into_paste_buffer ( void )
 {
-	char text[8192];
-	char *result = xemu_cbm_screen_to_text(
-		text,
-		sizeof text,
-		main_ram + ((vic_registers[0x31] & 0x80) ? (vic_registers[0x18] & 0xE0) << 6 : (vic_registers[0x18] & 0xF0) << 6),	// pointer to screen RAM, try to audo-tected: FIXME: works only in bank0!
-		(vic_registers[0x31] & 0x80) ? 80 : 40,		// number of columns, try to auto-detect it
-		25,						// number of rows
-		(vic_registers[0x18] & 2)			// lowercase font? try to auto-detect by checking selected address chargen addr, LSB
-	);
-	if (result == NULL)
+	char *result = vic4_textshot();
+	if (!result)
 		return;
 	if (*result) {
 		if (SDL_SetClipboardText(result))
@@ -551,6 +542,22 @@ static void ui_put_screen_text_into_paste_buffer ( void )
 			OSD(-1, -1, "Copied to OS paste buffer.");
 	} else
 		INFO_WINDOW("Screen is empty, nothing to capture.");
+	free(result);
+}
+
+static void ui_put_screen_text_into_file ( void )
+{
+	char fnbuf[PATH_MAX + 1];
+	_check_file_selection_default_override(last_used_dump_directory);
+	if (!xemugui_file_selector(
+		XEMUGUI_FSEL_SAVE | XEMUGUI_FSEL_FLAG_STORE_DIR,
+		"Dump screen ASCII content into file",
+		last_used_dump_directory,
+		fnbuf,
+		sizeof fnbuf
+	)) {
+		dump_screen(fnbuf);
+	}
 }
 
 static void ui_put_paste_buffer_into_screen_text ( void )
@@ -563,13 +570,7 @@ static void ui_put_paste_buffer_into_screen_text ( void )
 		t2++;
 	if (!*t2)
 		goto no_clipboard;
-	xemu_cbm_text_to_screen(
-		main_ram + ((vic_registers[0x31] & 0x80) ? (vic_registers[0x18] & 0xE0) << 6 : (vic_registers[0x18] & 0xF0) << 6),	// pointer to screen RAM, try to audo-tected: FIXME: works only in bank0!
-		(vic_registers[0x31] & 0x80) ? 80 : 40,		// number of columns, try to auto-detect it
-		25,						// number of rows
-		t2,						// text buffer as input
-		(vic_registers[0x18] & 2)			// lowercase font? try to auto-detect by checking selected address chargen addr, LSB
-	);
+	vic4_textinsert(t2);
 	SDL_free(t);
 	return;
 no_clipboard:
@@ -687,6 +688,7 @@ static const struct menu_st menu_display[] = {
 	{ "Screenshot",			XEMUGUI_MENUID_CALLABLE,	xemugui_cb_set_integer_to_one, &registered_screenshot_request },
 #endif
 	{ "Screen to OS paste buffer",	XEMUGUI_MENUID_CALLABLE,	xemugui_cb_call_user_data, ui_put_screen_text_into_paste_buffer },
+	{ "Screen to ASCII file",	XEMUGUI_MENUID_CALLABLE,	xemugui_cb_call_user_data, ui_put_screen_text_into_file },
 	{ "OS paste buffer to screen",	XEMUGUI_MENUID_CALLABLE,	xemugui_cb_call_user_data, ui_put_paste_buffer_into_screen_text },
 	{ NULL }
 };
diff --git a/targets/mega65/vic4.c b/targets/mega65/vic4.c
index 77a0e779..673a76a5 100644
--- a/targets/mega65/vic4.c
+++ b/targets/mega65/vic4.c
@@ -28,6 +28,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 #include "xemu/f011_core.h"
 #include "xemu/emutools_files.h"
 #include "io_mapper.h"
+#include "xemu/basic_text.h"
 
 
 #define SPRITE_SPRITE_COLLISION
@@ -1570,6 +1571,54 @@ int vic4_render_scanline ( void )
 }
 
 
+/* --- AUX FUNCTIONS FOR NON-ESSENTIAL THINGS (query current text screen parameters for other components, put/get screen content as ASCII) --- */
+
+
+int vic4_query_screen_width ( void )
+{
+	return REG_H640 ? 80 : 40;
+}
+
+
+int vic4_query_screen_height ( void )
+{
+	return EFFECTIVE_V400 ? 50 : 25;
+}
+
+
+Uint8 *vic4_query_screen_memory ( void )
+{
+	return main_ram + (SCREEN_ADDR & 0x7FFFF);
+}
+
+
+char *vic4_textshot ( void )
+{
+	char text[8192];
+	char *result = xemu_cbm_screen_to_text(
+		text,
+		sizeof text,
+		vic4_query_screen_memory(),
+		vic4_query_screen_width(),
+		vic4_query_screen_height(),
+		(vic_registers[0x18] & 2)	// lowercase font? try to auto-detect by checking selected address chargen addr, LSB
+	);
+	return result ? xemu_strdup(result) : NULL;
+}
+
+
+int vic4_textinsert ( const char *text )
+{
+	return xemu_cbm_text_to_screen(
+		vic4_query_screen_memory(),
+		vic4_query_screen_width(),
+		vic4_query_screen_height(),
+		text,				// text buffer as input
+		(vic_registers[0x18] & 2)	// lowercase font? try to auto-detect by checking selected address chargen addr, LSB
+	);
+}
+
+
 /* --- SNAPSHOT RELATED --- */
 
 
diff --git a/targets/mega65/vic4.h b/targets/mega65/vic4.h
index da40e330..e16afc05 100644
--- a/targets/mega65/vic4.h
+++ b/targets/mega65/vic4.h
@@ -253,7 +253,13 @@ extern void  vic_write_reg ( unsigned int addr, Uint8 data );
 extern Uint8 vic_read_reg  ( unsigned int addr );
 extern int   vic4_render_scanline ( void );
 extern void  vic4_open_frame_access ( void );
-extern void  vic4_close_frame_access (void );
+extern void  vic4_close_frame_access ( void );
+
+extern Uint8*vic4_query_screen_memory ( void );
+extern int   vic4_query_screen_width ( void );
+extern int   vic4_query_screen_height ( void );
+extern char *vic4_textshot ( void );
+extern int   vic4_textinsert ( const char *text );
 
 #ifdef XEMU_SNAPSHOT_SUPPORT
 #include "xemu/emutools_snapshot.h"
diff --git a/xemu/emutools.c b/xemu/emutools.c
index 21bda34e..b144c930 100644
--- a/xemu/emutools.c
+++ b/xemu/emutools.c
@@ -97,6 +97,8 @@ Uint32 *sdl_pixel_buffer = NULL;
 Uint32 *xemu_frame_pixel_access_p = NULL;
 int texture_x_size_in_bytes;
 int emu_is_fullscreen = 0;
+int emu_is_headless = 0;
+int emu_is_sleepless = 0;
 static int win_xsize, win_ysize;
 char *sdl_pref_dir = NULL, *sdl_base_dir = NULL, *sdl_inst_dir = NULL;
 Uint32 sdl_winid;
@@ -374,6 +376,8 @@ void xemu_set_screen_mode ( int setting )
 
 static inline void do_sleep ( int td )
 {
+	if (XEMU_UNLIKELY(emu_is_sleepless))
+		return;
 #ifdef XEMU_ARCH_HTML
 #define __SLEEP_METHOD_DESC "emscripten_set_main_loop_timing"
 	// Note: even if td is zero (or negative ...) give at least a little time for the browser
@@ -582,7 +586,6 @@ static void shutdown_emulator ( void )
 		sdl_win = NULL;
 	}
 	atexit_callback_for_console();
-	//SDL_Quit();
 	if (td_stat_counter) {
 		char td_stat_str[XEMU_CPU_STAT_INFO_BUFFER_SIZE];
 		xemu_get_timing_stat_string(td_stat_str, sizeof td_stat_str);
@@ -594,6 +597,7 @@ static void shutdown_emulator ( void )
 	}
 	// It seems, calling SQL_Quit() at least on Windows causes "segfault".
 	// Not sure why, but to be safe, I just skip calling it :(
+	//SDL_Quit();
 #ifndef XEMU_ARCH_WIN
 	SDL_Quit();
 #endif
@@ -1008,9 +1012,6 @@ int xemu_post_init (
 	void (*shutdown_callback)(void)		// callback function called on exit (can be nULL to not have any emulator specific stuff)
 ) {
 	srand((unsigned int)time(NULL));
-#	include "build/xemu-48x48.xpm"
-	SDL_RendererInfo ren_info;
-	int a;
 	if (!debug_fp)
 		xemu_init_debug(getenv("XEMU_DEBUG_FILE"));
 	if (!debug_fp && chatty_xemu)
@@ -1021,6 +1022,15 @@ int xemu_post_init (
 		ERROR_WINDOW("Byte order test failed!!");
 		return 1;
 	}
+#ifndef	XEMU_ARCH_HTML
+	if (emu_is_headless) {
+		static char *dummies[] = { "SDL_VIDEODRIVER=dummy", "SDL_AUDIODRIVER=dummy", NULL };
+		for (char **p = dummies; *p; p++) {
+			DEBUGPRINT("SDL: headless mode env-var setup: %s" NL, *p);
+			putenv(*p);
+		}
+	}
+#endif
 #ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
 	// Disallow disabling compositing (of KDE, for example)
 	// Maybe needed before SDL_Init(), so it's here before calling xemu_init_sdl()
@@ -1098,7 +1108,8 @@ int xemu_post_init (
 	strcpy(window_title_buffer, window_title);
 	window_title_buffer_end = window_title_buffer + strlen(window_title);
 	//SDL_SetWindowMinimumSize(sdl_win, SCREEN_WIDTH, SCREEN_HEIGHT * 2);
-	a = SDL_GetNumRenderDrivers();
+	int a = SDL_GetNumRenderDrivers();
+	SDL_RendererInfo ren_info;
 	while (--a >= 0) {
 		if (!SDL_GetRenderDriverInfo(a, &ren_info)) {
 			DEBUGPRINT("SDL renderer driver #%d: \"%s\"" NL, a, ren_info.name);
@@ -1146,6 +1157,7 @@ int xemu_post_init (
 	xemu_render_dummy_frame(black_colour, texture_x_size, texture_y_size);
 	if (chatty_xemu)
 		printf(NL);
+#	include "build/xemu-48x48.xpm"
 	xemu_set_icon_from_xpm(favicon_xpm);
 	return 0;
 }
diff --git a/xemu/emutools.h b/xemu/emutools.h
index 0b98666d..6dfd02b7 100644
--- a/xemu/emutools.h
+++ b/xemu/emutools.h
@@ -146,6 +146,8 @@ extern int sdl_default_win_x_size, sdl_default_win_y_size;
 extern int register_new_texture_creation;
 extern SDL_version sdlver_compiled, sdlver_linked;
 extern Uint32 *xemu_frame_pixel_access_p;
+extern int emu_is_headless;
+extern int emu_is_sleepless;
 
 #define XEMU_VIEWPORT_ADJUST_LOGICAL_SIZE	1
 //#define XEMU_VIEWPORT_WIN_SIZE_FOLLOW_LOGICAL	2