Commit Graph

19 Commits (feed0d2b0edab83bb1299a5bfb33ea8fb7c8a159)

Author SHA1 Message Date
Justine Tunney feed0d2b0e Add minor improvements and cleanup 2020-10-27 03:39:46 -07:00
Justine Tunney 9e3e985ae5 Make terminal ui binaries work well everywhere
Here's some screenshots of an emulator tui program that was compiled on
Linux, then scp'd it to Windows, Mac, and FreeBSD.

https://justine.storage.googleapis.com/blinkenlights-cmdexe.png
https://justine.storage.googleapis.com/blinkenlights-imac.png
https://justine.storage.googleapis.com/blinkenlights-freebsd.png
https://justine.storage.googleapis.com/blinkenlights-lisp.png

How is this even possible that we have a nontrivial ui binary that just
works on Mac, Windows, Linux, and BSD? Surely a first ever achievement.

Fixed many bugs. Bootstrapped John McCarthy's metacircular evaluator on
bare metal in half the size of Altair BASIC (about 2.5kb) and ran it in
emulator for fun and profit.
2020-10-19 06:38:31 -07:00
Justine Tunney c45e46f871 Add fixes performance and static web server 2020-10-05 23:11:49 -07:00
Justine Tunney 23d333c090 Make more improvements
This change includes many bug fixes, for the NT polyfills, strings,
memory, boot, and math libraries which were discovered by adding more
tools for recreational programming, such as PC emulation. Lemon has also
been vendored because it works so well at parsing languages.
2020-09-28 01:20:34 -07:00
Justine Tunney 416fd86676 Make improvements
- Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader

- Whipped up a webserver named redbean. It services 150k requests per
  second on a single core. Bundling assets inside zip enables extremely
  fast serving for two reasons. The first is that zip central directory
  lookups go faster than stat() system calls. The second is that both
  zip and gzip content-encoding use DEFLATE, therefore, compressed
  responses can be served via the sendfile() system call which does an
  in-kernel copy directly from the zip executable structure. Also note
  that red bean zip executables can be deployed easily to all platforms,
  since these native executables work on Linux, Mac, BSD, and Windows.

- Address sanitizer now works very well
2020-09-14 00:02:34 -07:00
Justine Tunney 7327c345f9 Get address sanitizer mostly working 2020-09-03 05:44:37 -07:00
Justine Tunney 5aabacb361 Add pseudoteletypewriter to emulator
https://justine.storage.googleapis.com/emulator628.mp4
2020-08-29 23:51:09 -07:00
Justine Tunney f4f4caab0e Add x86_64-linux-gnu emulator
I wanted a tiny scriptable meltdown proof way to run userspace programs
and visualize how program execution impacts memory. It helps to explain
how things like Actually Portable Executable works. It can show you how
the GCC generated code is going about manipulating matrices and more. I
didn't feel fully comfortable with Qemu and Bochs because I'm not smart
enough to understand them. I wanted something like gVisor but with much
stronger levels of assurances. I wanted a single binary that'll run, on
all major operating systems with an embedded GPL barrier ZIP filesystem
that is tiny enough to transpile to JavaScript and run in browsers too.

https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 04:43:42 -07:00
Justine Tunney 467504308a Improve emulator color math
Video game emulators seem to convert colors for modern displays poorly.
Check out https://youtu.be/Eds63YbGhDQ?t=481 where we notice in the CRT
displays Super Mario Bros with a blue sky, whereas the PC shows purple.

It's likely b/c NTSC used Illuminant C whereas sRGB uses Illuminant D65.
See the improvement: https://justine.storage.googleapis.com/nesemu3.png
Now you can play video games in the terminal as they looked in the 80's.

This change also reduces CPU usage to a third.
2020-07-02 20:48:57 -07:00
Justine Tunney 72b654cb6c Add NES emulator
It's now possible to play classic video game roms with teletypewriters.
https://justine.storage.googleapis.com/nesemu.png
2020-07-02 13:46:08 -07:00
Justine Tunney ac00be1a4e Make small fixes and oops ran clang-format on dtoa 2020-06-30 19:55:47 -07:00
Justine Tunney b5b60015f5 Add spellcheck example
One of the benefits of implementing system call support from scratch is
that we're able to have embedded zip filesystem support which trickles
into libraries such as stdio, without unportable symbolic interposition.
It's also be great if we could say open("gs://bucket/object", O_RDONLY)
for seamless GCS, similar to Java NIO, but abstracted by the C library.
2020-06-27 12:25:40 -07:00
Justine Tunney d5c3a6f039 Add example for auto debugging and asm() usage 2020-06-26 16:09:04 -07:00
Justine Tunney d51409ccd9 Add glob and some finer tuning of documentation 2020-06-21 15:23:35 -07:00
Justine Tunney a2c2d14100 Add further clarity to example package 2020-06-18 16:23:41 -07:00
Justine Tunney 2e979c00c3 Polish up repository and other revisions 2020-06-16 06:38:43 -07:00
Justine Tunney d23bb6612e Make it easy to create new packages 2020-06-15 22:09:03 -07:00
Justine Tunney b4269930f7 Add scouts honor escape hatch for source embedding 2020-06-15 19:01:28 -07:00
Justine Tunney c91b3c5006 Initial import 2020-06-15 07:18:57 -07:00