preparation for a couple of new BASIC commands

c64/basic/basic_commands_CD/cmd__jumptable_CD.s

@@ -0,0 +1,46 @@
+// #LAYOUT# STD *       #TAKE
+// #LAYOUT# *   BASIC_0 #TAKE
+// #LAYOUT# *   *       #IGNORE
+
+//
+// Jumptable for BASIC commands with tokens prefixed by $CD
+//
+
+
+.const command_CD_list = List().add(
+
+	cmd_slow,
+	cmd_fast
+)
+
+
+#if !HAS_OPCODES_65C02
+
+
+command_CD_jumptable_lo:
+
+	put_jumptable_lo(command_CD_list)
+
+
+command_CD_jumptable_hi:
+
+	put_jumptable_hi(command_CD_list)
+
+
+#else // HAS_OPCODES_65C02
+
+
+__before_command_CD_jumptable:
+
+.if (mod(*, $2) == 1) { brk }          // align code so that vector never crosses page boundary
+
+command_CD_jumptable:
+
+	put_jumptable(command_CD_list)
+
+	// Make sure routine size is always the same - build system limitation
+
+.if (__before_command_CD_jumptable == command_CD_jumptable) { brk }
+
+
+#endif

c64/basic/basic_commands_CD/cmd_fast.s

@@ -0,0 +1,8 @@
+// #LAYOUT# STD *       #TAKE
+// #LAYOUT# *   BASIC_0 #TAKE
+// #LAYOUT# *   *       #IGNORE
+
+
+cmd_fast:
+
+	jmp do_NOT_IMPLEMENTED_error // XXX implement the command

c64/basic/basic_commands_CD/cmd_slow.s

@@ -0,0 +1,8 @@
+// #LAYOUT# STD *       #TAKE
+// #LAYOUT# *   BASIC_0 #TAKE
+// #LAYOUT# *   *       #IGNORE
+
+
+cmd_slow:
+
+	jmp do_NOT_IMPLEMENTED_error // XXX implement the command