TalOS — Version 0.11 (18P07)

Theme

| # | Name | RGB | Decimal | Use | |---|--------------+--------------|-----------------|------------------------| | 0 | Dark Purple | #302 #330022 | (51, 0, 34 ) | Background Dark Theme | | 1 | Light Grey | #cbb #ccbbbb | (204, 187, 187) | Foreground | | 2 | Light Orange | #e75 #ee7755 | (238, 119, 55 ) | High Emphasis | | 3 | Light Purple | #959 #995599 | (153, 85, 153) | Normal Emphasis | | 4 | Mid Purple | #424 #442244 | (68, 34, 68 ) | Background Light Theme |

Tested Environments

Android 13	Status	Issues
Termux	✅

Ubuntu (WSL2)	Status	Issues
XTerm	✅	🛈 TrueType Fonts need to be enabled for unicode.
Cool Retro Term	✅

Windows 11	Status	Issues
Alacritty	✅	🚩 Pasting multiple lines inserts extra white space.
VSCode Terminal	✅	⚠️ Sometimes deleting multiple characters rapidly while holding Del breaks the line editor.
Windows Terminal	✅

Varavara's UxnTal Operating System

Memory is organized as follows:

               #ffff
         +----------------+
         |  Input Buffer  |  ( 1 Kb )
         +----------------+
   G     | Kernel Buffers |
   R  +--+======@pit======+  #fc00
   O  |  |  Symbols List  |
   W  |  |----------------*-->@pit-ptr
   T  |  |                |
   H  ⋁  |                |
         |                |
   D     |  Free Memory   |
   I     |                |
   R  ⋀  |                |
   E  |  |                |
   C  |  |----------------*-->@heap-ptr
   T  |  |   User Code    |
   I  +--+=====@heap======+
   O     |     Kernel     |
   N     +----------------+  #0100
         |   Zero Page    |  ( 256 B )
         +----------------+
               #0000

Hosts

• Windows 11/WSL2
  • Linux 5.15.153.1-microsoft-standard-WSL2 #1 SMP x86_64 GNU/Linux
• Windows 11/MSYS2
  • MINGW64_NT-10.0-22631 3.5.4-0bc1222b.x86_64 x86_64 Msys
• Android 13/Termux
  • Linux 4.14.186-27210951 #1 SMP PREEMPT armv8l Android
• Android Go
  • Linux 4.14.193-ab21113 #1 SMP PREEMPT armv7l Android

Operator Interaction

     /_    ⋃ ⨉ ⋂    TalOS    v0.10 (18P02)
  /_/ /     ©2024 Ismael Venegas Castelló
   /       Type help for more information.

56664 bytes free.

փ > #2a18 DEO
*
փ > @star #2a18 DEO JMP2r

փ > star
*
փ >

Under the Hood

A parent label starts assembly mode, this will do the following:

1. Assemble the input buffer and place the code after the current position of @here, and update the @here pointer.
2. Add an entry to the "dictionary" ("header" format still under design) and update it's pointer.

Note: [ and ] allow multiline input.

փ > @star ( -- )
...   [ LIT2 "* -Console/write ] DEO
...   JMP2r

փ > star
*

փ >

Doubts:

• star JSI semantics (but not syntax) will need to be adapted to jump to an absolute address in REPL mode?
• How to allow multiline input without using [ ]?

@heap

The assembled code area will be concatenated as if assembling Uxntal normally.

| @heap-ptr ( 1337 )
| a0 2a 18 17 6c  ( #2a18 DEO JMP2r )
|
∨ @heap-ptr ( 133c )

@pit

The dictionary will grow in the contrary direction at a constant size for each entry. Instead of a linked list in tipycal Threaded Interpretive Languages (TILs), concatenating in inverse order to an array. When searching for a routine searching from last entry to first as done by TILs is accomplished by starting the search from the "physical beginning" of the array, where the current @pit-ptr points to.

∧ @pit-ptr ( ????-n entry bytes )
|
| identifier                           addr
| s  t  a  r  ( pad to n max bytes )   1337
| 73 74 61 72 00 00 00 00 00 00 00 00  13 37
| @pit ( ???? )

ANSI Control Codes

Feature	Code
bold	1
Secondary color	2
Itallic	3
Underline	4
Blinking	5
Inverted background	7
Hidden	8
Striked through	9

Support

Environment	1	2	3	4	5	7	8	9
Windows 11 (22631.3880) Windows Terminal (1.20.11781.0) WSL2 (2.2.4.0) Ubuntu (22.04.4 LTS) dash (0.5.11+git20210903+057cd650a4ed-3build1)	✔️	✔️	✔️	✔️	✔️	✔️	✔️	✔️
Windows 11 (22631.3880) Chrome Browser (126.0.6478.182) Developer Tools	❌	❌	✔️	✔️	❌	✔️	❌	✔️

Reasoning

Concatenating instead of threading the routines allows for the usage of Uxntal and not another Uxntal like language with new or different syntax though some semantics may need to be adapted.

փ > :paste
INFO: Multiline paste mode enabled.

փ > @<pdec> ( dec* -- )
...   DUP #64 DIV <pnum>/try
...   DUP #0a DIV <pnum>/try
...   ( >> )
...
... @<pnum> ( num* -- )
...   #0a MOD [ LIT "0 ] ADD .Console/write DEO
...   JMP2r
...
...   &try ( num* -- )
...     DUP ?<pnum>
...     POP JMP2r
... ( Alt+Enter: Evaluate multiline input )

փ > :paste
INFO: Multiline paste mode disabled.

փ > #002a pdec  ( Enter: Evaluate line input )
42

փ >

In this case calling <pdec> would fall through to <pnum> body as in normal Uxntal, something that would not be possible with a tipical threaded implementation.

Drifblim VS drifloon

Zero Page

• Drifblim uses Console and File, drifloon only Console.
• loon uses @token $2 while blim uses @token $1 buf $30.

on-init

• loon uses <assemble> and <read>.
• blim uses only <assemble> on files.

TODO

• Return to repl when when evaluating break BRK expression, by pressing Enter 3 times.
• #foo! should be a Number error (fixed in drifblim).
• Fix key routine.
• Reinstate include rune.
• Refactor into something better the file hierarchy.
• Implement log level.
• Fix lambda syms, not being the same as with uxnasm.
• Implement library path. (not possible due to sandbox)
• Make rom smaller (no unused space in between code/data).
• Make multiline more robust.
• Reset symbols and heap after expression evaluation.
• Fix memory usage.
• Add print strings with underscore as spaces routine.
• Clear heap and symbols after error.
• Reset PC after absolute padding expression.
• Keep trak of ZP pointer.
• Check memory limits ZP, input buffer, head and tail, before writing.
• Log session.
• Make multiline more robust with rlwrap.
• Use walkcomment and allow nesting.
• Make pmem take the lenght to dump.
• Make symbols store code length.
• Implement macros.
• Make logging toggleable.
• [], {}, () parse these correctly. (take strings into account.)
• Comment out debugging for release.
• Remove uneeded experiments.
• Integrate disassembler.
• Restore stacks without :! when aborting from all errors!
• Fix: abort early.

փ [140e]> snathoue
ERROR: Unknown reference: snathoue in expression.
ERROR: Aborting...
INFO: Assembled expression in 3 bytes.
WST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<
RST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<

փ [140e]> #23434
ERROR: Number #23434 in expression.
ERROR: Number #23434 in expression.
ERROR: Aborting...
INFO: Assembled expression in 1 bytes.
WST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<
RST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<

• Show length of padding as well:

փ [13fc]> @foo $1
WST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<
RST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<

փ [13fd]> @bar #01 ,foo STR JMP2r
Assembled bar in 6 bytes.
WST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<
RST 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|<

• print own symbols
• Enable switching in and out of evaluation/caching modes when typing an expression or including a file.
• DUP LIT 28 NEQ ?{ #00 ,&comment STR POP BRK }this_is_valid_uxntal!!!!
• shouldn't be allowed (leading / creates invalid definition):

@/MOD ( a b -- a/b a%b ) [
  DIVk STHk MUL SUB STHr SWP JMP2r
]
  ok

Rom Visualization

Repository Tree

.
|
├── bak
├── bin
├── build.sh
├── config
│   ├── buffers.tal
│   ├── constants.tal
│   ├── data.tal
│   ├── macros.tal
│   ├── options.tal
│   ├── routines.tal
│   ├── startup.tal
│   └── symbols.tal
├── doc
├── etc
├── lib
│   ├── audio
│   │   └── routines.tal
│   ├── console
│   │   └── macros.tal
│   ├── constants.tal
│   ├── control
│   │   └── routines.tal
│   ├── datetime
│   │   └── routines.tal
│   ├── file
│   │   └── routines.tal
│   ├── macros.tal
│   ├── memory
│   │   └── routines.tal
│   ├── mouse
│   │   └── routines.tal
│   ├── ops
│   │   └── macros.tal
│   ├── routines.tal
│   ├── screen
│   │   ├── data.tal
│   │   └── routines.tal
│   ├── signed
│   │   └── routines.tal
│   ├── string
│   │   ├── macros.tal
│   │   └── routines.tal
│   └── system
│       └── routines.tal
├── rom
├── src
│   ├── assembler
│   │   ├── buffers.tal
│   │   ├── data.tal
│   │   ├── generics.tal
│   │   ├── helpers.tal
│   │   ├── primitives.tal
│   │   └── routines.tal
│   ├── debugger
│   │   ├── macros.tal
│   │   └── routines
│   │       ├── after-eval.tal
│   │       └── before-eval.tal
│   ├── lexer
│   │   ├── data.tal
│   │   └── routines.tal
│   ├── logger
│   │   ├── constants.tal
│   │   ├── data.tal
│   │   ├── error
│   │   │   └── abort.tal
│   │   ├── info
│   │   │   ├── multiline-prompt.tal
│   │   │   ├── prompt.tal
│   │   │   ├── stacks.tal
│   │   │   └── summary.tal
│   │   ├── macros.tal
│   │   ├── routines.tal
│   │   └── warn
│   │       └── redefinition.tal
│   ├── talos
│   │   ├── buffers.tal
│   │   ├── data.tal
│   │   ├── includes.tal
│   │   ├── macros.tal
│   │   └── main.tal
│   ├── repl
│   │   ├── buffers.tal
│   │   ├── data.tal
│   │   ├── macros.tal
│   │   ├── routines.tal
│   │   └── symbols.tal
│   └── tokenizer
│       ├── buffers.tal
│       └── routines.tal
└── test
    ├── macros.tal
    ├── opctest.tal
    ├── routines.tal
    └── script.tal

sudo apt install deepin-terminal eterm foot gnome-terminal gnome-console kgx kitty konsole lxterminal mate-terminal mlterm opencu pterm qterminal rxvt-unicode s3dvt sakura stterm terminal.app terminology termit tilda tilix yakuake zutty

https://www.eddymens.com/blog/creating-a-browser-based-interactive-terminal-using-xtermjs-and-nodejs

https://superuser.com/questions/413073/windows-console-with-ansi-colors-handling/1050078#1050078

https://stackoverflow.com/questions/44447473/how-to-make-xterm-js-accept-input

https://gist.github.com/mlocati/fdabcaeb8071d5c75a2d51712db24011