Added a crude IRQ and NMI override vector.

src/boot.c

@@ -259,6 +259,14 @@ const char * boot_source_name(enum boot_src_e device) {
 }
 
 static void boot_reset_screen() {
+	// Reset the region
+	t_rect boot_text_window;
+	boot_text_window.origin.x = 0;
+	boot_text_window.origin.y = 0;
+	boot_text_window.size.width = 0;
+	boot_text_window.size.height = 0;
+	txt_set_region(0, &boot_text_window);
+
 	// txt_set_mode(0, TXT_MODE_TEXT | TXT_MODE_SPRITE);
 	*tvky_mstr_ctrl = (uint16_t)(VKY_MCR_TEXT);
 
@@ -278,6 +286,7 @@ static void boot_reset_screen() {
 
 	// Clear the text screen
 	txt_clear(0, 2);
+	txt_set_xy(0, 0, 0);
 }
 
 void boot_from(enum boot_src_e device, boot_record_p boot_record) {

src/dev/interrupts_f256.c

@@ -93,6 +93,9 @@ p_int_handler int_handle_25;
 p_int_handler int_handle_26;
 p_int_handler int_handle_27;
 
+uint32_t * irq_ram_vector = (uint32_t *)0x00fdec;
+uint32_t * nmi_ram_vector = (uint32_t *)0x00fdf4;
+
 /**
  * @brief Mapping of FoenixMCP interrupt numbers to F256 GABE group numbers (0xff indicates an unassigned interrupt number)
  * 
@@ -134,6 +137,10 @@ void int_init() {
 	int i;
 	p_int_handler * int_handlers = &int_handle_00;
 
+	// Zero out the interrupt ram vectors
+	*irq_ram_vector = 0;
+	*nmi_ram_vector = 0;
+
 	// Clear all the interrupt handlers
 	for (i = 0; i < 4 * 8; i++) {
 		int_handlers[i] = 0;
@@ -475,6 +482,12 @@ SYSTEMCALL void int_clear(unsigned short n) {
 void int_handle_irq() {
 	uint8_t mask_bits = 0;
 
+	if (*irq_ram_vector != 0) {
+		p_int_handler handler = (p_int_handler)(*irq_ram_vector);
+		handler();
+		return;
+	}
+
 	// Process any pending interrupts in group 0
 	mask_bits = *PENDING_GRP0;
 	if (mask_bits) {
@@ -531,4 +544,9 @@ void int_handle_irq() {
  * __attribute__((interrupt(0xffea)))  
  */
 void int_handle_nmi() {
+	if (*nmi_ram_vector != 0) {
+		p_int_handler handler = (p_int_handler)(*nmi_ram_vector);
+		handler();
+		return;
+	}
 }

src/dev/tiles.c

@@ -66,7 +66,7 @@ void tile_init() {
 void tile_map_assign(uint8_t map, uint16_t * address, uint8_t width, uint8_t height, uint8_t size) {
 	if (map <= VKY_TILEMAP_MAX) {
 
-		uint16_t * tile_map_ram = (uint8_t *)tile_map_memory_base;
+		uint16_t * tile_map_ram = (uint16_t *)tile_map_memory_base;
 		for (int i = 0; i < width*height; i++) {
 			tile_map_ram[i] = address[i];
 		}

src/version.h

@@ -7,6 +7,6 @@
 
 #define VER_MAJOR 1
 #define VER_MINOR 0
-#define VER_BUILD 4
+#define VER_BUILD 9
 
 #endif