shortened BASIC commands jumptable handling

c64/basic/engine/execute_line_statements.s

@@ -32,6 +32,11 @@ execute_statements:
 	cmp #$7F
 	bcc_16 do_SYNTAX_error             // branch if not a token    XXX here we should handle variable assignments
 
+	cmp #$A9
+	bcs execute_statements_extended
+
+execute_statements_run_token:
+
 	// Initialize temporary string stack - just about any statement might need it
 	// XXX original C64 ROM initializes this during the startup too - not sure where to put this
 
@@ -63,6 +68,21 @@ execute_statements:
 #endif
 
 
+execute_statements_extended:
+
+	cmp #$CB                                     
+	bne !+
+
+	// 'GO' command has a strande token, after functions
+
+	lda #$A9
+	bne execute_statements_run_token
+!:
+	// XXX here is the place for possible extended BASIC command set
+
+	jmp do_SYNTAX_error
+
+
 execute_statements_end_of_line:
 
 	// First check, if we are in direct mode - if so,