@@ -120,7 +120,7 @@ screen_resize(Uint16 width, Uint16 height)

 {

 	Uint8 *bg, *fg;

 	Uint32 *pixels = NULL;

-	if(width < 0x8 || height < 0x8 || width >= 0x400 || height >= 0x400)

+	if(width < 0x8 || height < 0x8 || width >= 0x800 || height >= 0x800)

 		return;

 	if(uxn_screen.width == width && uxn_screen.height == height)

 		return;

@@ -116,6 +116,16 @@ system_init(Uxn *u, Uint8 *ram, char *rom)

 /* IO */

+Uint8

+system_dei(Uxn *u, Uint8 addr)

+{

+	switch(addr) {

+	case 0x4: return u->wst.ptr;

+	case 0x5: return u->rst.ptr;

+	default: return u->dev[addr];

+	}

+}

+

 void

 system_deo(Uxn *u, Uint8 *d, Uint8 port)

 {

@@ -134,6 +144,12 @@ system_deo(Uxn *u, Uint8 *d, Uint8 port)

 				ram[dst + (Uint16)(b_addr + i)] = ram[src + (Uint16)(a_addr + i)];

 		}

 		break;

+	case 0x4:

+		u->wst.ptr = d[4];

+		break;

+	case 0x5:

+		u->rst.ptr = d[5];

+		break;

 	case 0xe:

 		system_inspect(u);

 		break;

@@ -9,9 +9,9 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 WITH REGARD TO THIS SOFTWARE.

 */

-#define SYSTEM_VERSION 1

-#define SYSTEM_DEIMASK 0x0000

-#define SYSTEM_DEOMASK 0xff08

+#define SYSTEM_VERSION 2

+#define SYSTEM_DEIMASK 0x0030

+#define SYSTEM_DEOMASK 0xff38

 #define RAM_PAGES 0x10

@@ -24,4 +24,5 @@ int system_version(Uxn *u, char *emulator, char *date);

 int system_error(char *msg, const char *err);

 int system_init(Uxn *u, Uint8 *ram, char *rom);

+Uint8 system_dei(Uxn *u, Uint8 addr);

 void system_deo(Uxn *u, Uint8 *d, Uint8 port);

@@ -24,6 +24,7 @@ Uint8

 emu_dei(Uxn *u, Uint8 addr)

 {

 	switch(addr & 0xf0) {

+	case 0x00: return system_dei(u, addr);

 	case 0xc0: return datetime_dei(u, addr);

 	}

 	return u->dev[addr];

@@ -73,7 +74,7 @@ main(int argc, char **argv)

 	system_connect(&u, 0xc, DATETIME_VERSION, DATETIME_DEIMASK, DATETIME_DEOMASK);

 	/* Read flags */

 	if(argv[i][0] == '-' && argv[i][1] == 'v')

-		return system_version(&u, "Uxncli - Console Varvara Emulator", "17 Aug 2023");

+		return system_version(&u, "Uxncli - Console Varvara Emulator", "19 Aug 2023");

 	if(!system_init(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++]))

 		return system_error("Init", "Failed to initialize uxn.");

 	/* Game Loop */

@@ -96,6 +96,7 @@ emu_dei(Uxn *u, Uint8 addr)

 {

 	Uint8 p = addr & 0x0f, d = addr & 0xf0;

 	switch(d) {

+	case 0x00: return system_dei(u, addr);

 	case 0x20: return screen_dei(u, addr);

 	case 0x30: return audio_dei(0, &u->dev[d], p);

 	case 0x40: return audio_dei(1, &u->dev[d], p);

@@ -516,7 +517,7 @@ main(int argc, char **argv)

 	system_connect(&u, 0xc, DATETIME_VERSION, DATETIME_DEIMASK, DATETIME_DEOMASK);

 	/* Read flags */

 	if(argv[i][0] == '-' && argv[i][1] == 'v')

-		return system_version(&u, "Uxnemu - Graphical Varvara Emulator", "17 Aug 2023");

+		return system_version(&u, "Uxnemu - Graphical Varvara Emulator", "19 Aug 2023");

 	if(strcmp(argv[i], "-2x") == 0 || strcmp(argv[i], "-3x") == 0)

 		set_zoom(argv[i++][1] - '0', 0);

 	if(!emu_init())