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feat(v4.0.0): a node is sent text as a message and sends back what it prints

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MESH.md step 3.  The ports are the transport; the message is what is
transported: to, from, type, heat and TTL, ACL tag, sequence, length, then
text four characters to a word.

- quit.v4: a node with nothing to do is blocked reading "any port"; text
  for it is interpreted; (FINISH) sends what it printed and then how the
  text ended, and it waits again
- core.v4: EMIT keeps what is printed, (FLUSH-OUT) and (HDR) send it to the
  sender on the port the message came on.  EMIT still needs one free data
  cell and no more; it works on the return stack and in A and B
- message.h/.c: the same format for whatever is on a port and is not a node
- boot.c: the boot is the node's console on port 1 and its kernel on port 0
- the prompt tests are a console that speaks messages
- gone: v4_line_begin, v4_line_done, v4_line_status; writing a node's input
  buffer and setting its P from outside; any use of CONSOLE-TX

Verified: make -C v4 test (test_host_quit.c 1283 checks, the full-stack
figures unchanged) and make -C v4 sanitize pass; hosted-check passes on
three ISAs with POST 550 of 550; clean qemu with STARFORTH_V4=1 passes POST
and answers lines typed at each prompt on amd64, aarch64 and riscv64
(logs/20261006-110551, -111621, -111341).  -110837 is an aarch64 run ended
by the test wrapper's limit while still in UEFI firmware; it shows nothing
about v4.

Not done: KEY, EXPECT and QUERY still read the console's input registers;
a message not for this node is let go (step 4).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-06 11:19:46 -04:00
co-authored by Claude Opus 5.5
parent 42610e844f
commit a041b401ea
24 changed files with 844 additions and 178 deletions
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v4/tests/test_host_input.c
+4 -1
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@@ -263,7 +263,10 @@ int main(void)
}
n.mem[BASE] = 10;
CHECK(v4_node_console_feed(&n, "Z", 1) == 1 && run("KEY", 0, 0, 0, 0) && pop() == 'Z' && clean(), "KEY");
CHECK(run("EMIT", 1, 'q', 0, 0) && clean() && n.console_len == 1 && n.console[0] == 'q', "EMIT");
/* a node has no console of its own: what it prints is kept to be sent (core.v4) */
n.mem[OUT_PTR] = OUT_W;
CHECK(run("EMIT", 1, 'q', 0, 0) && clean() && n.mem[OUT_PTR] == OUT_W + 1 && n.mem[OUT_W] == 'q', "EMIT");
CHECK(run("EMIT", 1, 0x141, 0, 0) && clean() && n.mem[OUT_PTR] == OUT_W + 2 && n.mem[OUT_W + 1] == 'A', "EMIT prints the low 8 bits");
}
/* ---- the in-line names ---- */