Virgil Dupras
389b23fe1a
Change C<? mechanic
...
It's now a simple flag updated by the C< implementation. No more
routine pointer.
The goal is to avoid tons of "ok" during a LOAD operation.
2020-04-25 09:10:25 -04:00
Virgil Dupras
af39b37dd1
Replace the "> " prompt with the more traditional "ok" one
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This is more than cosmetic, it's also highly usable. The presence
or absence of the "ok" message allows us to know whether the command
aborted. Previously, the "> " prompt appeared when the system expected
a prompt in the INTERPRET context, whether the previous command aborted
or not.
Also, this allows us to get rid of that ugly FLAGS global variable.
2020-04-24 12:10:07 -04:00
Virgil Dupras
5d4155aa32
Add words 1+ 2+ 1- 2- and consts 0 1 -1
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Saves quite a few bytes in the final binary.
2020-04-15 21:29:39 -04:00
Virgil Dupras
d996dd8c9e
Add one layer of indirection in subsystem memory management
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This allows optional subsystems to not needlessly reserve too much
system memory and it also reduces offsets bookkeeping.
2020-04-12 20:42:00 -04:00
Virgil Dupras
420836276d
readln: rename (c<) to (rdln<)
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so that it isn't picked up automatically at boot. Only when (c<$) is
called do we override (c<). This fixes tricky boot problems.
2020-04-12 14:01:54 -04:00
Virgil Dupras
6368cc3bac
Remove (sysv)
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Replace its usages with direct RAM+ offsets. The (sysv) mechanism was
incompatible with cross-compilation of a full interpreter.
2020-04-10 14:57:00 -04:00
Virgil Dupras
58e88119ec
rc2014: Forth Collapse OS, fully operational!
2020-04-05 09:09:00 -04:00
Virgil Dupras
edb2771488
rc2014: bingo!
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Interpreter is functional in the emulator!
2020-04-04 17:43:00 -04:00
Virgil Dupras
32b420b19c
readln: fix typo
2020-04-04 14:26:41 -04:00
Virgil Dupras
435b4f452c
Move ASCII constants from str unit to print
2020-04-04 10:28:00 -04:00
Virgil Dupras
e284081c79
forth: fix readln overflow handling
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It was badly handled.
2020-04-02 13:40:22 -04:00
Virgil Dupras
c2d8fc845d
forth: bring ." and ABORT" down to core.fs level
2020-03-25 20:39:07 -04:00
Virgil Dupras
3e934a2a3b
forth: fix name conflict with "H" in core and z80a
2020-03-25 20:13:33 -04:00
Virgil Dupras
9791c0957d
forth: make readline skip prompt when appropriate
2020-03-21 14:59:12 -04:00
Virgil Dupras
c1ece95089
forth: implement readline in Forth
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The commit ended up being much bigger than anticipated. This was a long thread
of underlying complexities. This lead to the creation of interesting concepts
such as (sysv).
2020-03-21 12:57:49 -04:00
