started work on setting text mode

src/kernal/extapi_m65/mega65_mode65.s

@@ -0,0 +1,35 @@
+// #LAYOUT# M65 KERNAL_1 #TAKE
+// #LAYOUT# *   *        #IGNORE
+
+
+M65_MODE65:
+
+	// Disable interrupts, they might interfere
+
+	sei
+
+	// Switch CPU speed to fast
+
+	jsr M65_FAST
+
+	// Set the magic string to mark native mode
+
+	lda #$4D // 'M'
+	sta M65_MAGICSTR+0
+	lda #$36 // '6'
+	sta M65_MAGICSTR+1
+	lda #$35 // '5'
+	sta M65_MAGICSTR+2
+
+	// Switch VIC to VIC-IV mode
+
+	jsr viciv_unhide
+
+	// Set screen mode to 80x25
+
+	lda #$01
+	jsr m65_scrmodeset_internal
+
+	// Clear the screen
+
+	jmp M65_CLRSCR