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Update: The project has moved to Sourceforge. |
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Attention Slashdot crowd, here is a little background: This application is a recompiled version of the original Commodore 64 binary – it is not a reimplementation, so while it runs at pretty much the maximum possible speed, it is still 100% compatible. The huge C file in the archive has been produced by feeding the original 6502 code into my static recompiler and optimizing it with LLVM. The original operating system interface (character I/O, LOAD, SAVE etc.) has been reimplemented in native C, so Commodore BASIC interfaces nicely with OS X/Windows/Unix – you can use pipe I/O, and you can pass the filename of a BASIC program on the command line. Yes, you could also just run a standard C64 emulator, but it wouldn’t be nearly this speed, and everything would run inside a sandbox; and there would be no way to interface this to your OS. |
A while back, I released Apple I BASIC and Commodore BASIC as a scripting language for Mac OS X 10.5 on Intel. It did not work on any other OS or on a different CPU type.
Today, we are releasing Commodore BASIC as a Scripting Language – it works on Linux, Windows, Mac OS X 10.4/10.5 (Intel and PowerPC), and you even get the source, so you can adapt it to other operating systems and CPUs.
Download it here: cbmbasic.zip
The archive comes with binaries for Mac OS X and Windows. The source compiles on Linux, Windows and Mac OS X. All code is BSD-licensed. Main work by Michael Steil, speed optimizations, Linux and Windows fixes by James Abbatiello.
The core of the BASIC interpreter is in the file cbmbasic.c, which is platform, endianness and bitness independent. For all I/O, it calls out into runtime.c, do it should be able to adapt this project for any OS by just changing runtime.c.
All function calls that the core interpreter can’t handle end up in kernal_dispatch() in runtime.c, where a switch statement dispatches these to C functions. For Commodore BASIC, runtime.c has to support several Commodore KERNAL library routines. Some of them are very important (CHRIN, CHROUT) and some are only used for certain BASIC statements (LOAD, SAVE, OPEN, SETTIM). runtime.c does not implement all functions yet.
Feel free to port cbmbasic to your system and architecture of choice, and extend runtime.c to support more functions. If you like, send your changes back to us (mist64<at>mac<dot>com, abbeyj<at>gmail<dot>com), so we can update the main project and give your changes to everyone. We’re also interested how fast you can get it with different compilers and settings.
See my old article for more info as well as some insights on how it is done.
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See also: |
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Wow, what a great idea!, but do i have to do a lot of “poke” and “peek” to get high resolution graphics and sound?:)
It also lack of a user manual for this type interpreter!!!!!!!!!!!!!!!
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Where did you get the idea to use CBM basic for scripting on a modern OS? The first computer I ever had was a C64, when I was about 8 years old in 1990. I started learning to program, but never really got the knack for it until I discovered GFA Basic for my next computer, an Atari ST, a couple of years later.
I quickly came to feel that C64 basic sucked horribly, was inexpressive, hard-to-use and unfriendly – at least compared to GFA (not having line numbers was another nice thing :)).
[...] Pagetable ha publicado un programa que trae de vuelta el mitico lenguaje BASIC de ordenadores de Commodore como es el Commodore 64, a nuestro sistema actual. El programa es multiplataforma, de cĂłdigo abierto y estĂĄ diponible para Linux, MacOS X y Windows. Y lo mas importante, te permite usarlo como un lenguaje de scripting en tu sistema. [...]
I must report that GW-BASIC is still being used, runs on any Windows platform and is available free at:
http://www.geocities.com/KindlyRat
[...] as a Scripting Language 17 11 2008 On October 28th Michael Steil announced on his blog Pagetable the release of Commodore BASIC as a scripting language for Linux, Windows and Mac (OS X 10.4/10.5 [...]
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[...] emuladores retro Jueves, 18 de Diciembre de 2008 Ir a comentarios Dejar un comentario Commodore BASIC para Mac OS X, Linux y Windows, una versiĂłn para ordenadores modernos de ese lenguaje que tantas [...]
[...] Commodore BASIC as a Scripting Language for UNIX and Windows – now Open Source, Michael Steil over at pagetable has statically recompiled and modified Commodore’s original BASIC so that it can be used as a scripting language in UNIX and Windows. [...]
I’m able to run cbmbasic scripts but can anyone tell me how to run code in direct mode?
All I get is syntax errors.
Turn CAPS LOCK on to aviod syntax errors.
C64 manuals can be found here:
http://www.lemon64.com/manual/
http://www.devili.iki.fi/Computers/Commodore/C64/Programmers_Reference/page_iii.html
-Allan
You are aware that the Commodore 64 used the Motorola 6510 processor, correct? It was the Vic-20 that used the 6502. Can you be sure that this is 100% compatible with the Commodore 64′s version of basic?
OK, I am thinking assembler…my bad :)
Either way the 6510 is 100% compatible with the 6502, as it uses the same CPU die. The only difference is the added 6-bit I/O register and tristate logic.
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The 6510 processor was NOT by Motorola! You’re thinking of the 65000 which was used in Macintoshes and the Amiga.
The 6510 was from MOS semiconductor, who Commodore bought and owned. Ironically, the Apple II and the Atari 2600 used the 6502 processor and had to buy them from Commodore.
You mean the 68000. And probably also the 6800 series, also from Motorola.
Versions of GWBASIC for Windows and Linux would be great too. I havnt got a clue how to do that myself. I love the simplicity of the old languages – makes them quicker to learn and use for the occassional programmer. A dBase language would be another contender for this treatment, since I’ve been searching for something I can use to create simple databases without success. Thanks very much for making this available.
Ric:
Isn’t it possible to run GWBASIC.EXE directly under Windows? (at least on 32-bit windows)
This is so hot. My SGI Irix machine now is able to run legacy CBM BASIC much faster than in VICE. Now, how do I peek and poke the CRiMe graphics on my O2 ?
I think the Versions of GW BASIC for Windows and Linux would be great to,
The old languages are makes them quicker to learn, Anyone using more static languages, such as C and C++, will be used to attaching debuggers to running programs.
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This sounds wonderful! What would be even better: C128 BASIC 7.0 with Walrusoft’s “BASIC 8″ extension.
Is this doable?
When I saw this I was giddy. Hey, and it works like a charm! Thanx!
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Hi!
Hmm, cbmbasic.c looks as if it was generated.
I’m writing a C64 emulator (http://svn.nomike.com/playground/trunk/emu/C64/ ), so do you still have the original source and generator of cbmbasic.c somewhere? If so, could I read it? I could use that in order to help me learn to use LLVM properly and/or debug the emu :-)
Since you have experience with LLVM, do you know how to use LLVM JIT for dynamic languages?
The LLVM builder seems to be strangely datatype insistent.
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