implement STOP and END commands

c64/basic/cmd_break.s

@@ -0,0 +1,23 @@
+cmd_stop:	
+basic_do_break:
+	jsr printf
+	.byte "BREAK",0
+
+	;; Check for direct mode
+	;; Are we in direct mode
+	lda basic_current_line_number+1
+	cmp #$ff
+	beq +
+	;; Not direct mode
+	jsr printf
+	.byte " IN ",0
+	lda basic_current_line_number+1
+	ldx basic_current_line_number+0
+	jsr print_integer
+	
+*
+	lda #$0d
+	jsr $ffd2
+cmd_end:
+	jmp basic_main_loop
+