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LithosAnanake/v4/capsule/quit.v4
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rajamesandClaude Opus 5.5 348eed7fa1 feat(v4.0.0): five nodes from nothing -- Hera asks for nodes, births and joins them 
MESH.md step 5, in the fabric under test; the products are still one
node each until steps 8 and 9.

manage.c: what Hera asks of whoever holds the fabric, eleven requests by
KERNEL-WORD -- NODE-ME -BORN -WIRE -UNWIRE -SLEEP -WAKE -KILL -PARITY and
CAPSULE-OPEN -CELL -LINE. Nucleus: PORT!, SEND-ON, AWAIT, (SEAL).
capsules/v4/hera.4th: BIRTH and UNIT, the unit rule in FORTH and nowhere
else. The dictionary hash moves to the engine (v4_image_dict_hash).

test_host_unit.c, 34 checks, 64-bit: Hera is born empty, takes the
nucleus through her port, FORTH-79, POST and her capsule; 10 UNIT; four
nodes are born, each takes the nucleus and FORTH-79 through its port from
Hera and passes POST 538/538; four parities, one dictionary hash; they
talk, and a message between two corners not wired goes by Hera.

All v4 tests at both widths and under ASan+UBSan. hosted-check on three
ISAs. Bare metal: logs/20261006-143934 (amd64), -144204 (aarch64),
-144601 (riscv64).

Open, recorded in MESH.md: not run at 32 bits; a node that never answers
leaves Hera waiting; the capsules are read from files in the test, not
from the baked directory.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-06 14:48:23 -04:00

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\ quit.v4 -- a line of text, interpreted; how it ends; and the words that
\ print text written in the source.
\
\ DECOMPOSITION.md 5.15 and 5.10: QUIT ABORT ABORT" (ABORT") ." (."). Part of
\ the compiler capsule. Rests on all the files before it.
\
\ A NODE IS SENT TEXT (docs/v4.0.0/MESH.md section 6). It does not read its
\ own command line and prints no prompt. A node with nothing to do waits at
\ its ports; a neighbour writes it a message; if that is text for this node
\ it is interpreted; what it printed goes back as a message, and then a
\ message saying how the text ended:
\ 1 it completed a console says " ok"
\ 2 it ended in an error the message is already printed; " ERROR"
\ 0 QUIT nothing is said
\ What a console then shows is v3's:
\ ok> 65 EMIT the console's prompt, and the line
\ A ok what the line printed, then " ok"
\ ok> NOSUCH
\ UNKNOWN WORD: 'NOSUCH'
\ ERROR
\ ok> -1 @
\ Address out of range an address fault (D-14), from any depth
\ ERROR
\ KEY, EXPECT and QUERY are FORTH-79 words that read characters, as before;
\ they are not how text reaches the node. They still read the console's
\ registers, CONSOLE-RX and CONSOLE-STATUS, and not a message.
\
\ THE STACKS are guarded (D-16): each counts what it holds, and a push onto
\ a full one or a pop from an empty one is a fault. So QUIT and ABORT, which
\ never return to whatever ran them, must empty the return stack, and ABORT
\ the data stack too. A store to RSTACK-DEPTH or DSTACK-DEPTH does that.
\
\ Constants the loader supplies:
\ (LINE-STATUS) word address of the variable: how the last text ended
\ (MSG) (REPLY) (ME) (OUT) (OUT^) see core.v4, "what a node prints"
\ (PORT) word address of the node's port 0; (PORT)+8 is "any port" and
\ (PORT)+9 the port the last read from that came on
\ (Q) word address of four cells of scratch, which system.v4 and
\ blocks.v4 use too
\ DSTACK-DEPTH RSTACK-DEPTH word addresses of the stack registers
\ ( -- ) empty the return stack. `a` is only something to store: any
\ store to the register empties the stack, and `a` needs nothing to be on
\ the data stack. One cell of the data stack is used for a moment.
macro R-CLEAR RSTACK-DEPTH b! a !b endmacro
\ ( -- ) stop compiling; forget the word being built and any open control
\ structures. A definition that was under way stays hidden.
: (RESET) 0 STATE a! ! (CG-RESET) CFBASE (CFP) a! ! ;
\ CATCHING A LINE'S ERROR. While the variable (CATCH) is not zero, a line
\ that ends in an error -- a fault, or a code in NODE-ERROR -- does not say
\ ERROR: (CATCH) is set to -1 and the line is reported as completed. Whatever message the
\ error printed has gone wherever EMIT was sending it. POST uses this to
\ go on to its next case, and to check the cases that must fail
\ (docs/v4.0.0/NUCLEUS.md 6.3). (EMIT-HOOK), core.v4, is set to 0 here at
\ the end of every line, caught or not.
\
\ ( s -- ) the text is done with. What it printed is sent, then a message
\ saying how it ended -- 0 QUIT, 1 completed, 2 an error -- and the node waits
\ for the next. (DONE) is entered with the same number and decides whether
\ an error was one to catch; it is always jumped to, never called, by
\ something that has emptied the return stack (or by a fault, which empties
\ it). (LINE-STATUS) keeps how the last text ended.
: (FINISH) ( s -- )
(LINE-STATUS) b! dup !b
(FLUSH-OUT)
(DONE-PORT) a! @ (GATE) (MSG)+1 a! @ !b \ to whoever sent the text
3 (HDR) 4 !b !b \ a message of type 3, four characters long: how it ended
jump (IDLE)
: (DONE)
(EMIT-HOOK) b! 0 !b \ what is printed is printed again
if GO -1 + if OK
drop (RESET)
(CATCH) b! @b if LOUD drop -1 !b 1 jump (DONE) \ caught: the text completed
LOUD: drop 2 jump (FINISH)
OK: drop 1 jump (FINISH)
GO: drop 0 jump (FINISH)
\ ( -- ) WAITING. A node with nothing to do deals with the oldest of the
\ messages waiting (core.v4). With none waiting it is blocked reading its
\ ports (docs/v4.0.0/MESH.md 4.1): it executes nothing until a neighbour
\ writes, and what arrives is taken in as any message is, its first word
\ from any port and the rest from the port that came on. The message's
\ text goes into TIB, which holds 1024 characters, the most a message
\ carries; one that came with a length no message has is error 12. A
\ message of type 1 for this node is text to interpret: it is done as a
\ line was, and (FINISH) reports how it ended. A message for another node
\ is passed on, (PASS-ON).
: (IDLE)
L: (MQ#) a! @ if WAIT drop jump HAVE
WAIT: drop (PORT)+8 b! @b (PORT)+9 b! @b (PORT) + dup b! \ ( to port ) B: the port it came on
SWAP (TAKE) jump L
HAVE:
(MQ@) (MSG) a! ! (MQ@) (MSG)+1 a! ! (MQ@) (MSG)+2 a! ! (MQ@) (MSG)+3 a! !
(MQ@) (MSG)+4 a! ! (MQ@) (MSG)+5 a! ! (MQ@) (MSG)+6 a! ! (MQ@) (REPLY) a! !
(MSG)+6 a! @ -if SIZED
drop 0 (MSG)+6 a! ! 0 SPAN a! ! NODE-ERROR b! 12 !b \ no telling what it was
SIZED: drop
TIB 2/ 2/ (MSG)+6 a! @ 3 + 2/ 2/ if EMPTY
-1 + FOR (MQ@) over a! ! 1 + NEXT
drop jump READ
EMPTY: drop drop
READ:
0 (MSG)+6 a! @ TIB + C! \ a zero after the text
(MSG)+6 a! @ SPAN a! !
(MSG) a! @ (ME) a! @ xor if MINE drop jump (PASS-ON)
MINE: drop
(MSG)+2 a! @ -1 + if TEXT drop jump (IDLE) \ for this node and not text: let go
TEXT: drop
(MSG)+1 a! @ (PORT-FOR) if D0 jump D1 \ the way back to whoever sent it:
D0: drop (REPLY) a! @ \ the port it came on, if no other is known
D1: (DONE-PORT) a! !
(CONSOLE) a! @ if P0 jump P1 \ where what it prints goes: the console,
P0: drop (MSG)+1 a! @ \ or whoever sent it
P1: dup (PRINT-TO) a! !
(PORT-FOR) if Q0 jump Q1
Q0: drop (REPLY) a! @
Q1: (PRINT-PORT) a! !
jump (LINE)
\ ( -- ) A MESSAGE FOR ANOTHER NODE is passed on (MESH.md section 7): all
\ of it, as it came, to the port that leads toward that node. With no way
\ known it is let go, and (LOST) counts it.
: (PASS-ON)
(MSG) a! @ (PORT-FOR) if NOWAY
(GATE) (MSG) a! 6 FOR @+ !b UNEXT \ its seven words
(MSG)+6 a! @ 3 + 2/ 2/ if SENT
-1 + TIB 2/ 2/ a! FOR @+ !b UNEXT \ and its text
jump (IDLE)
SENT: drop jump (IDLE)
NOWAY: drop (LOST) a! @ 1 + ! jump (IDLE)
\ ( -- ) THE TEXT, INTERPRETED. It is in TIB with a zero after it and its
\ length in SPAN, and the return stack is empty. It is interpreted with one
\ return entry under it, this word's call of INTERPRET; whatever is on the
\ data stack stays there.
: (LINE)
0 BLK a! ! \ the terminal, whatever was being loaded
TIB (SRC) a! ! 0 >IN a! !
0 NODE-ERROR b! !b
INTERPRET
NODE-ERROR b! @b if GOOD
drop 2 jump (DONE)
GOOD: drop 1 jump (DONE)
\ ---- the node among others (MESH.md sections 6 and 7) ---------------------------
\ Not FORTH-79 and not in v3: v3's VMs are sent to through the kernel.
\ ( node port -- ) the port, by its number, leads toward that node
header ROUTE
: ROUTE
(ROUTE#) a! @ -16 + if FULL drop
(PORT) + (ROUTE#) a! @ 2* (ROUTES) + a!
push !+ pop !+
(ROUTE#) a! @ 1 + ! ;
FULL: drop drop drop NODE-ERROR b! 12 !b ;
\ ( node port -- ) the node on the other end of the port, by its number;
\ 0: none, or a device. Whoever wires the node tells it, and tells it again
\ when the wiring changes. It is what lets one of two neighbours, and one
\ only, wait to write to the other (core.v4, (GATE)).
header NEIGHBOUR
: NEIGHBOUR
dup -if POS jump BAD
POS: -PORTS + -if BAD drop (NEAR) + a! ! ;
BAD: drop drop drop NODE-ERROR b! 12 !b ;
\ ( port -- ) the port, by its number, leads toward every node not told of
header DEFAULT-ROUTE
: DEFAULT-ROUTE (PORT) + (ROUTE-DEFAULT) a! ! ;
\ ( -- ) forget every way: for when the wiring has changed
header NO-ROUTES
: NO-ROUTES 0 (ROUTE#) a! ! 0 (ROUTE-DEFAULT) a! ! ;
\ ( baddr u node port -- ) send the node u characters of text to
\ interpret, by the port given, by its address. It is on its way when this
\ returns. The write waits for the neighbour to read, and is not begun
\ until it may be (core.v4, (GATE)).
: (SEND-ON)
(GATE) !b \ to
1 (HDR)
dup !b \ length
3 + 2/ 2/ if NONE -1 +
FOR dup C@ over 1 + C@ 8* + over 2 + C@ 8* 8* + over 3 + C@ 8* 8* 8* + !b 4 + NEXT
drop ;
NONE: drop drop ;
\ ( baddr u node -- ) send the node u characters of text to interpret,
\ by the way this node knows to it. What it prints there goes to that
\ node's console. With no way to the node it is error 12.
header SEND
: SEND
dup (PORT-FOR) if NOWAY jump (SEND-ON)
NOWAY: drop drop drop drop NODE-ERROR b! 12 !b ;
\ ( baddr u node port -- ) the same by a port this node names, by its
\ number, whatever ways it knows: for a neighbour that has no number of
\ its own yet, to which text is sent as to node 0.
header SEND-ON
: SEND-ON
dup -if POS jump BAD
POS: -PORTS + -if BAD drop (PORT) + jump (SEND-ON)
BAD: drop drop drop drop drop NODE-ERROR b! 12 !b ;
\ ( node -- how ) WAIT FOR THE NODE'S WORD OF HOW TEXT ENDED: 0 QUIT,
\ 1 completed, 2 an error. This node is blocked reading its ports until a
\ message of type 3 comes for it from that node; every other message that
\ comes meanwhile is kept with the messages waiting. It waits for ever
\ for a node that never answers.
header AWAIT
: AWAIT
(AWAIT-FROM) a! !
L: (PORT)+8 b! @b (PORT)+9 b! @b (PORT) + dup b! SWAP (TAKE-HDR)
(MQ-HDR) a! @ (ME) a! @ xor if A1 drop jump KEEP
A1: drop (MQ-HDR)+2 a! @ -3 + if A2 drop jump KEEP
A2: drop (MQ-HDR)+1 a! @ (AWAIT-FROM) a! @ xor if A3 drop jump KEEP
A3: drop (MQ-HDR)+6 a! @ -4 + if A4 drop jump KEEP
A4: drop @b ; \ its one word
KEEP: (TAKE-KEEP) jump L
\ ( w port -- ) write a cell to the port, by its number. It waits until
\ the neighbour has taken it. This is how a node is sent a capsule of F18
\ code (docs/v4.0.0/MESH.md section 5): the cells go as they are, not as a
\ message, to a node that is executing from its ports.
header PORT!
: PORT!
dup -if POS jump BAD
POS: -PORTS + -if BAD drop (PORT) + b! !b ;
BAD: drop drop drop NODE-ERROR b! 12 !b ;
\ ( -- ) WHAT IS IN THE DICTIONARY NOW IS THE SYSTEM: COLD comes back to
\ it and FORGET will not go below it. Whoever has loaded a node's capsules
\ has it do this (system.v4, (BOOT) and FENCE).
header (SEAL)
: (SEAL)
DP a! @ (BOOT) a! !
(LATEST) a! @ (BOOT)+1 a! !
DP a! @ 3 + 2/ 2/ FENCE a! ! ;
\ FORTH-79: clear the return stack, set execution mode, return control to
\ the terminal; no message is given. The data stack is left as it is.
\ NODE-ERROR, by name: how a definition written in FORTH raises an error.
\ A store of a code that is not zero is the trap of D-18 -- the word goes no
\ further, the message for the code is printed (-1: the word has printed
\ its own) and the line ends with ERROR. The codes are listed in core.v4.
header NODE-ERROR inline : NODE-ERROR' NODE-ERROR ;
header (CATCH) inline : (CATCH)' (CATCH) ;
header (ME) inline : (ME)' (ME) ;
header (CONSOLE) inline : (CONSOLE)' (CONSOLE) ;
header (LOST) inline : (LOST)' (LOST) ;
header (WORD-DEFINED) inline : (WORD-DEFINED)' (WORD-DEFINED) ;
header (WORD-FORGOTTEN) inline : (WORD-FORGOTTEN)' (WORD-FORGOTTEN) ;
header (EMIT-HOOK) inline : (EMIT-HOOK)' (EMIT-HOOK) ;
header QUIT
: QUIT R-CLEAR (RESET) CR 0 jump (DONE)
\ FORTH-79: clear the data and return stacks, set execution mode, return
\ control to the terminal. As v3, the line it stops ends with " ok".
\ Both are emptied before anything is called: ABORT may be run with the
\ return stack full.
header ABORT
: ABORT R-CLEAR DSTACK-DEPTH b! a !b (RESET) 1 jump (DONE)
\ ---- faults (D-14, D-16) -------------------------------------------------------
\ Where the node goes when a programme uses an address outside its memory,
\ pushes onto a full stack or pops an empty one. The opcode that faulted did
\ nothing, and both stacks have been emptied. Each handler says what happened;
\ whatever was running is abandoned, as by ABORT, and the line ends with
\ ERROR.
: (FAULT) \ "Address out of range"
$72646441 (EMIT4) $20737365 (EMIT4) $2074756F (EMIT4) $7220666F (EMIT4) $65676E61 (EMIT4) CR
2 jump (DONE)
: (D-OVER) \ "Stack overflow"
$63617453 (EMIT4) $766F206B (EMIT4) $6C667265 (EMIT4) $776F (EMIT4) CR
2 jump (DONE)
: (D-UNDER) \ "Stack underflow"
$63617453 (EMIT4) $6E75206B (EMIT4) $66726564 (EMIT4) $776F6C (EMIT4) CR
2 jump (DONE)
: (R-OVER) \ "Return stack overflow"
$75746552 (EMIT4) $73206E72 (EMIT4) $6B636174 (EMIT4) $65766F20 (EMIT4) $6F6C6672 (EMIT4) $77 (EMIT4) CR
2 jump (DONE)
: (R-UNDER) \ "Return stack underflow"
$75746552 (EMIT4) $73206E72 (EMIT4) $6B636174 (EMIT4) $646E7520 (EMIT4) $6C667265 (EMIT4) $776F (EMIT4) CR
2 jump (DONE)
\ A word has stored an error code in NODE-ERROR (D-18; the codes are listed
\ in core.v4). Print its message -- a negative code means the word printed
\ its own -- and end the line with ERROR. The return stack has been
\ emptied; the data stack is as the word left it.
: (RAISED)
NODE-ERROR b! @b
-if POS drop 2 jump (DONE)
POS: -1 + if M1 -1 + if M2 -1 + if M3 -1 + if M4
-1 + if M5 -1 + if M6 -1 + if M7 -1 + if M8 -1 + if M9
-1 + if M10 -1 + if M11 -1 + if M12 -1 + if M13 -1 + if M14
-1 + if M15 -1 + if M16
drop 2 jump (DONE)
M1: drop $6167654E (EMIT4) $65766974 (EMIT4) $756F6320 (EMIT4) $746E (EMIT4) CR 2 jump (DONE)
M2: drop $20746F4E (EMIT4) $756E2061 (EMIT4) $7265626D (EMIT4) CR 2 jump (DONE)
M3: drop $626D754E (EMIT4) $74207265 (EMIT4) $6C206F6F (EMIT4) $676E6F (EMIT4) CR 2 jump (DONE)
M4: drop $20746F4E (EMIT4) $68632061 (EMIT4) $63617261 (EMIT4) $726574 (EMIT4) CR 2 jump (DONE)
M5: drop $74636944 (EMIT4) $616E6F69 (EMIT4) $66207972 (EMIT4) $6C6C75 (EMIT4) CR 2 jump (DONE)
M6: drop $656D614E (EMIT4) $73696D20 (EMIT4) $676E6973 (EMIT4) CR 2 jump (DONE)
M7: drop $746E6F43 (EMIT4) $206C6F72 (EMIT4) $75727473 (EMIT4) $72757463 (EMIT4) $696D2065 (EMIT4) $74616D73 (EMIT4) $6863 (EMIT4) CR 2 jump (DONE)
M8: drop $746E6F43 (EMIT4) $206C6F72 (EMIT4) $75727473 (EMIT4) $72757463 (EMIT4) $74207365 (EMIT4) $64206F6F (EMIT4) $706565 (EMIT4) CR 2 jump (DONE)
M9: drop $66696853 (EMIT4) $6F632074 (EMIT4) $20746E75 (EMIT4) $2074756F (EMIT4) $7220666F (EMIT4) $65676E61 (EMIT4) CR 2 jump (DONE)
M10: drop $746F7250 (EMIT4) $65746365 (EMIT4) $6F772064 (EMIT4) $6472 (EMIT4) CR 2 jump (DONE)
M11: drop $69766944 (EMIT4) $6E6F6973 (EMIT4) $20796220 (EMIT4) $6F72657A (EMIT4) CR 2 jump (DONE)
M12: drop $75677241 (EMIT4) $746E656D (EMIT4) $74756F20 (EMIT4) $20666F20 (EMIT4) $676E6172 (EMIT4) $65 (EMIT4) CR 2 jump (DONE)
M13: drop $636F6C42 (EMIT4) $756F206B (EMIT4) $666F2074 (EMIT4) $6E617220 (EMIT4) $6567 (EMIT4) CR 2 jump (DONE)
M14: drop $62206F4E (EMIT4) $6B636F6C (EMIT4) $20736920 (EMIT4) $6E696562 (EMIT4) $6F6C2067 (EMIT4) $64656461 (EMIT4) CR 2 jump (DONE)
M15: drop $65666544 (EMIT4) $64657272 (EMIT4) $726F7720 (EMIT4) $6F6E2064 (EMIT4) $65732074 (EMIT4) $74 (EMIT4) CR 2 jump (DONE)
M16: drop $20746F4E (EMIT4) $6F772061 (EMIT4) $6472 (EMIT4) CR 2 jump (DONE)
\ The table the loader gives the node: six words, one for each kind of
\ fault in the node's order, each a jump. A jump fills its word, so they
\ are one after another.
: (FAULTS)
jump (FAULT) jump (D-OVER) jump (D-UNDER) jump (R-OVER) jump (R-UNDER) jump (RAISED)
\ ---- text in the source ---------------------------------------------------------
\ The three run-time words have names, as v3's have, so that SEE can tell a
\ string in a definition from code; they cannot be used from the prompt.
\ ." and ABORT" take the text up to the next " , which may be none at all
\ (input.v4's (PARSE)); with no closing " it is the rest of the line. Inside a definition they lay
\ down a call to their run-time word and, after it, the text as a counted
\ string: the count byte and the characters, four to a cell, the last cell
\ filled with zeros. The run-time word finds the string by the return
\ address the call left, and returns to the cell after the string.
\ ( -- ) lay the counted string in WBUF into the dictionary, as above.
\ (Q)+0 how many bytes are still to go, (Q)+1 which is next.
: (STRING,)
(FLUSH)
WBUF C@ 1 + (Q) a! ! 0 (Q)+1 a! !
L: (Q) a! @ if DONE -1 + !
(Q)+1 a! @ dup 1 + ! WBUF + C@ C,
jump L
DONE: drop
P: DP b! @b 3 and if ALIGNED drop 0 C, jump P
ALIGNED: drop ;
\ The run time of ." : print the string after the call, go on after it.
\ It takes the return address off before it calls anything and keeps the
\ count there instead, so a word that prints text goes no deeper than one
\ that calls any other word.
header (.") compile-only
: (.")
pop 4* dup C@ \ baddr n
L: if DONE
push 1 + dup C@ EMIT pop -1 + jump L
DONE: drop 4/ 1 + push ; \ the cell after the last character
\ FORTH-79: ." text" prints the text -- now, if interpreting; when the word
\ it is compiled into runs, if compiling.
header ." immediate
: DOT-QUOTE
34 (PARSE) drop
STATE a! @ if NOW
drop &(.") (CALL,) jump (STRING,)
NOW: drop WBUF COUNT jump TYPE
\ ( flag -- ) the run time of ABORT" : if the flag is not zero print the
\ string after the call, start a new line and ABORT; otherwise go on after
\ the string.
header (ABORT") compile-only
: (ABORT")
if NO
drop pop 4* R-CLEAR COUNT TYPE CR jump ABORT
NO: drop pop 4* dup C@ + 4/ 1 + push ;
\ ( flag -- ) ABORT" text" as v3 (it is FORTH-83's, not FORTH-79's): if
\ the flag is not zero, print the text and ABORT.
header ABORT" immediate
: ABORT-QUOTE
34 (PARSE) drop
STATE a! @ if NOW
drop &(ABORT") (CALL,) jump (STRING,)
NOW: drop if NO
drop WBUF COUNT TYPE CR jump ABORT
NO: drop ;
\ The run time of S" : leave the address and length of the string after the
\ call, and go on after it.
header (S") compile-only
: (S")
pop 4* dup C@ \ baddr n
over over + 4/ 1 + push \ the cell after the last character
push 1 + pop ; \ baddr+1 n
\ ( -- baddr u ) S" text" as v3. In a definition the text is compiled
\ into it. At the prompt it is copied to PAD, where it stays until PAD is
\ used again: WORD's buffer is overwritten by the very next word of the line.
header S" immediate
: S-QUOTE
34 (PARSE) drop
STATE a! @ if NOW
drop &(S") (CALL,) jump (STRING,)
NOW: drop WBUF+1 PAD WBUF C@ CMOVE PAD WBUF jump C@
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