[PDP-10 Only] Returns a function which specifies the “user hunk” predicate, which determines whether to “hook into” a user-provided definition for some system facility, or to treat the data strictly as a hunk. If no such function exists, returns NIL.

[PDP-10 Only] Used to enable fn as a “user hunk” predicate unless fn is NIL, in which case the “user hunk” feature is disabled instead. See (STATUS USRHUNK).

[PDP-10 Only] Returns the call intepreter function, a “transfer function” to be used when a “user hunk” is FUNCALL'd or NIL if no such call interpreter exists. The function, when it exists, behaves as a substitute for the IAPPLY internal Lisp routine.

[PDP-10 Only] Sets the Maclisp call interpreter to be a given fn. It is probably not possible to write the fn in Maclisp; typically, it is a hand-coded LAP function.

[PDP-10 Only] Returns the currently active SEND interpreter, a function which is invoked in order to send a message to a “user hunk.” When a hunk which passes the USRHUNK test is given as an argument to any of EQUAL, SUBST, PURCOPY, EVAL, PRINT, EXPLODE, FLATSIZE, ALPHALESSP, SAMEPNAMEP, NAMESTRING, SXHASH or some out-of-core functions such as GFLATSIZE, SPRINT, USERATOMS-HOOK, DESCRIBE, or WHICH-OPERATIONS.

[PDP-10 Only] Sets the SEND interpreter function returned by (STATUS SENDI).

[PDP-10 Only] Returns a list of the functions set up by a call to (SSTATUS VECTOR ...) or NIL if no such functions are active.

[PDP-10 Only] Specifies the functions, fns, which can be used by LEXPR-FUNCALL to recognize and destructure vectors by LEXPR-FUNCALL. The list, fns, should have the format

where all elements are SUBR pointers (not symbols, lambda expressions, or even LSUBR pointers). The vectorp function should be a one argument predicate which returns true for vector things; vectorlength should be a function which returns the length of a vector which is its only argument; and vref should be a function of 2 arguments, a vector and an index, and returns an element of that vector.

(SSTATUS VECTOR NIL) disables a previous call to (SSTATUS VECTOR ...).

[PDP-10 Only] This function performs the READ part of each cycle through the read-eval-print-loop. The value it returns is passed on to the next phase of the loop (the READ-*-EVAL-PRINT hook if not NIL, or the READ-*-EVAL-PRINT function otherwise).

[PDP-10 Only] This function performs the EVAL part of each cycle through the read-eval-print-loop. It receives a form to be EVAL'd and the value it returns is passed on to the next phase of the loop (the READ-EVAL-*-PRINT hook if if not NIL, or the READ-EVAL-*-PRINT function otherwise).

[PDP-10 Only] This function performs the PRINT part of each cycle through the read-eval-print-loop. It receives a form to be PRINT'd and the value it returns is passed on to the next phase of the loop (the READ-EVAL-PRINT-* hook if not NIL, or the READ-EVAL-PRINT-* function otherwise).

[PDP-10 Only] This function performs the trailing part of each cycle through the read-eval-print-loop. It types a carriage return. Its return value is not used by the system and is therefore not defined.

[PDP-10 Only] The simple (two argument) case of APPLY.

[PDP-10 Only] The simple (one argument) case of EVAL.

[PDP-10 Only] The simple (two argument) case of APPEND.

[PDP-10 Only] The simple (two argument) case of NCONC.

[PDP-10 Only] The simple (two argument) case of DELETE.

[PDP-10 Only] The simple (two argument) case of DELQ. Like *DELETE but uses EQ instead of EQUAL.

[PDP-10 Only] The simple (one argument) case of PRIN1.

[PDP-10 Only] The simple (one argument) case of PRINC.

[PDP-10 Only] The simple (one argument) case of PRINT.

[PDP-10 Only] The simple (no argument) case of TERPRI.

[PDP-10 Only] The simple (one argument) case of TYO.

[PDP-10 Only] The simple (no argument) case of READ.

[PDP-10 Only] The simple (no argument) case of READCH.

[PDP-10 Only] The simple (no argument) case of TYI.

[PDP-10 Only] The simple (two argument) case of PLUS.

[PDP-10 Only] The simple (two argument) case of TIMES.

The simple (two argument) case of DIFFERENCE.

The simple (two argument) case of QUOTIENT.

[PDP-10 Only] The simple (two argument) case of LESSP.

[PDP-10 Only] The simple (two argument) case of GREATERP.

exp must be of the form (fn . filespec ). Loads filespec, which must be a namelist or namestring. This is the initial handler for the Lisp autoloading facility (see AUTOLOAD).

This is the initial handler for *RSET-TRAP.

Default handler for Lisp's FAIL-ACT error breaks.

This is the default handler for GC-LOSSAGE.

This is the default handler for GC-OVERFLOW.

[PDP-10 Only] This is the default handler for IO-LOSSAGE.

This is the default handler for PDL overflows.

This is the default handler for an UNBND-VRBL condition.

Like +INTERNAL-UBV-BREAK only for undefined functions.

This is the default handler for a UNDF-FNCTN condition.

The default value of the variable UNSEEN-GO-TAG.

The default value of the variable WRNG-NO-ARGS.

The default value of the variable WRNG-TYPE-ARG

This is a system provided function which will type ##MORE## on file, which should be a file object open for output. This function will not return until the user types a space on the device which is ttycons of given file.

This is the default ENDPAGEFN for the default tty output file object which is the initial value of TYO.

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Autoloads from file: LISP;MACAID FASL

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This is a readcharacter macro initially on singlequote. It wraps a QUOTE around the next form.

This is the default reader macro for the vertical-bar character, “|”. It could have been enabled by doing (SSTATUS MACRO /| '+INTERNAL-/|-MACRO).

This is a splicing macro which reads characters until a carriage return and returns NIL (meaning no forms are to be inserted into the object currently being assembled). Thus, it implements Lisp's comment character.

This is a readcharacter macro which is designed to be placed on the doublequote character. (It is not initially on for reasons of compatibility with old code that would not expect it). The macro is like +INTERNAL-/|-MACRO except that the token read is MAKNAM'd and SETQ'd to itself to give the illusion of a string.

This is a readcharacter macro for use in various # syntaxes.

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This is the default handler for Control-B interrupts. It could have been enabled by doing (SSTATUS TTYINT 2. '+INTERNAL-^B-BREAK). It, like all tty interrupt handlers, receives two arguments. The file object upon which the interrupt was received (nearly always TYI) and the ascii value of the character which was typed to invoke the interrupt (in this case, 2, but there is no reason that the break can't be put on another key in which case it is possible to determine what key was actually typed).

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Representation for backquote's ",." syntax.

Representation for backquote's ",@" syntax.

Representation for backquote's "," syntax

Used by ` to count the number of , levels that READ is in so that it can tell if a comma has been seen which did not have an associated backquote.

Representation for backquotes "`" syntax.

SUBR form of |`-expander/||.

SUBR form of |`,@/|| and |`,./|| and |`,/||

Autoloads from file: LISP;HUMBLE FASL

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Reads a series of LAP (Lisp Assembly Program) expressions representing a function definition and installs the corresponding expression in memory for immediate use. The series of expressions is terminated by a NIL.

See also: LAP-A-LIST

Given a list of LAP (Lisp Assembly Program) expressions, does what the LAP program would do if those same expressions were fed to LAP as input expressions.

This function is also used by LAP after it builds a list of the user's input.