openfirmware
maths132-notes
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| openfirmware | maths132-notes | |
|---|---|---|
| 6 | 1 | |
| 96 | 1 | |
| - | - | |
| 0.0 | 0.0 | |
| over 8 years ago | about 3 years ago | |
| Forth | TeX | |
| - | GNU General Public License v3.0 only |
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openfirmware
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Thinking Forth
OpenFirmware has some code for paging! ;)
purpose: Set up page tables and turn on paging
https://github.com/openbios/openfirmware/blob/master/cpu/x86...
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Hypertext '87 (1987) [pdf]
NeWS didn't use FORTH. But HyperTIES used both FORTH and NeWS because there were a lot of things that FORTH could do that NeWS couldn't, like link and call C code. The FORTH I used was Mitch Bradley's "Sun Forth", which evolved into OpenFirmware, and which was once defined by an IEEE standard, "IEEE 1275-1994", but it was withdrawn because the standard was not reaffirmed:
https://en.wikipedia.org/wiki/Open_Firmware
>Open Firmware is described by IEEE standard IEEE 1275-1994, which was not reaffirmed by the Open Firmware Working Group (OFWG) since 1998 and has therefore been officially withdrawn by IEEE.
It's still alive and maintained and used for many things. Here's the source code, called OpenBIOS:
https://github.com/openbios
https://github.com/openbios/openfirmware
https://openfirmware.info
https://openfirmware.info/Welcome_to_OpenBIOS
- What to Learn
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Moving Forth (1993)
Some Forth systems even have a "metacompiler" that lets one FORTH system compile another FORTH system for the same or different CPU, word size, byte order, threading model, etc, from the same source code!
OpenFirmware (the FORTH burnt into boot roms of SPARC, PowerPC, OLPC, and other systems) is a great example:
openfirmware/forth/kernel/metacompile.fth
https://github.com/openbios/openfirmware/blob/d5cc657ce81c0f...
- PostScript Language Reference [pdf]
maths132-notes
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PostScript Language Reference [pdf]
I used to love programming in PostScript.
This post prompted me to put some of my old math notes up on GitHub [1]. The final chapter on coupled differential equations sends the DE's parameters to the PostScript printer, where my PS code would execute the different equations and draw the resulting phase portrait.
My PS code is in that repo's README. The final results are in the notes.pdf file [2]. The best examples are in the last few pages.
[1] https://github.com/stevesimmons/maths132-notes
[2] https://github.com/stevesimmons/maths132-notes/blob/main/not...
What are some alternatives?
forth - Porting Richard Jones' FORTH to ARM
qpdf - QPDF: A content-preserving PDF document transformer
sbcl - Mirror of Steel Bank Common Lisp (SBCL)'s official repository