some error message improvements

c64/basic/engine/do_error.s

@@ -40,6 +40,8 @@ do_kernal_error:                       // .A = KERNAL error code, also almost ma
 	// Convert to BASIC error code
 
 	tax
+	beq do_BREAK_error                 // XXX is 0 really a proper error code?
+
 	dex
 	bpl do_basic_error                 // branch always
 

c64/basic/engine/execute_line_statements.s

@@ -40,7 +40,7 @@ execute_statements:
 	// Check if token is valid for execution
 
 	cmp #$7F
-	bcc_16 do_SYNTAX_error             // branch if not a token    XXX here we should handle variable assignments
+	bcc_16 execute_statements_var_assign         // not a token - try variable assign
 
 	cmp #$A6
 	bcs execute_statements_extended
@@ -224,3 +224,21 @@ execute_line:
 	sta CURLIN+1
 
 	jmp execute_statements
+
+
+execute_statements_var_assign:
+
+	// XXX here we should handle variable assignments, probably in a separate file
+
+	// Prevent wedges from being executed within a program
+
+#if CONFIG_TAPE_WEDGE
+	cmp #$40
+	beq_16 do_DIRECT_MODE_ONLY_error
+#endif
+#if CONFIG_DOS_WEDGE
+	cmp #$5F
+	beq_16 do_DIRECT_MODE_ONLY_error
+#endif
+
+	jmp do_SYNTAX_error