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configured motors and counters.cdef("?") — Lists all the pieces of all the chained macros.cdef("name", "", "?") — Lists the pieces of the macro named name .Built-In Macro NamesThe following macro names are built-in to spec. They are run at the specified timesonly if they have been given a definition.begin_mac — If a macro by this name exists, it will be run after reading the hardwareconfiguration file and all the start-up command files, but before reading commandsfrom the keyboard.end_mac — If a macro by this name exists, it will be run when spec exits from eithera ˆD or a quit command.config_mac — If a macro by this name exists, it will be run after reading the configurationfile at start up and after the reconfig command is executed.prompt_mac — If a macro by this name exists, it will always be run just before specissues the main, level-zero prompt. If an error occurs while runningprompt_mac ,itwill be automatically undefined.cleanup, cleanup1 — If either or both exists, they will be run whenever an error isencountered, the exit command is encountered, or a user types ˆC . Thecleanup macros is run first. After running the clean-up macros, spec givesthe standard prompt and waits for the next command from the keyboard.cleanup_once — Aclean-up macro (added in release 4.03.13) that is always deletedbefore a new spec main prompt is issued. If defined, its definition will bepushed on to the input stream whenever an error is encountered, the exitcommand is encountered, or a user types ˆC .cleanup_always — Like cleanup_once ,but its definition is not removed except by anexplicit undef command.MacroArgumentsWithin ordinary macros (not macro functions), the symbols $1 , $2 , ... ,are replacedby the arguments with which the macro is invoked. Arguments are defined asstrings of characters separated by spaces. Also, quotes can be used to include morethan one space-separated string in a single argument. Use \" or \’ to pass literalquotes. Arguments can be continued over more than one line by putting a backslash92 REFERENCE MANUAL INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION