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Old 04 August 2011, 06:28   #22
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Join Date: Nov 2009
Location: UK
Posts: 497
I have tried Alvyn, it doesn't appear to be updated since 2004.

Alvyn was meant to be an AMOSPro-compatible BASIC interpreter, and captures much of the feel of the AMOSPro editor. While the Alvyn editor was written in Java, it appears the Alvyn interpreter is written in C++, while jAMAL is written entirely in Java, so merging the two projects would require a rewrite of one or both (and a merging of sprite/screen engines, etc). This may be more fruitful when jAMAL is more complete and memory-efficient.

In addition to Alvyn, there was also the Mattathias BASIC project, which is written in ANSI C and aims to implement a full BASIC compiler compatible with AMOSPro (unlike Alvyn which is interpreted). This was discussed over at AMOS Factory (and I enquired here about the possibility of combining code with jAMAL), unfortunately it appears Mattathias is no longer in active development either.

These 3 projects all attempt a high-level reimplementation of parts of AMOSPro on modern hardware and operating systems. This is a similar approach AROS has taken with AmigaOS, and is a similar kind of reimplementation to projects such as ScummVM (and even Wine, as it implements the API level) - only allowing many enhancements beyond the capabilities of the original Amiga.

This is in contrast to emulators such as WinUAE, which replicate vintage hardware at a very low level, and so can already run the original AMOSPro near-perfectly under emulation - albeit limited to the original chipset's graphics. This is the approach taken by the AMOS for Windows installer.

P.S. A few years ago, I wrote a simple BASIC-style interpreter in C++ called "MequaScript", itself much inspired by AMOS.
If I ever get the time to do a Java port (it would need a lot of work and expanding), I would consider integrating AMOSPro-compatible syntax, and finally merging it with the jAMAL project. (Not this year however, unfortunately.)

Last edited by Mequa; 04 August 2011 at 06:50.
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