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Amiga Technology

The Almost Forgotten Story of the Amiga 2000 192 192

polyp2000 writes Many don't realize the impact the much forgotten Amiga 2000 had on the world. This lovely article is an informative and lighthearted read, especially if you are interested in the world of CG. "Unfortunately, The Amiga 2000 is one of the least favorite or collectible Amigas. Even today, with the most "die hard" Amiga fans, the A2000 often is ignored and shunned as a 'big, ugly' tank of a machine. One look at eBay (Canada or the U.S.), on any given day, and you can see that the A2000 often doesn't sell at all, and most times goes for a lot cheaper than all the other Amigas — even cheaper than an A500. But, because of this, one can find awesome deals, because, most of the time, the seller has no clue about what Zorro cards are inside, and for next to nothing, you can pick up a fully loaded A2000 with an '030 or above for peanuts."
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The Almost Forgotten Story of the Amiga 2000

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  • by 0xdeaddead (797696) on Sunday July 20, 2014 @11:15PM (#47497971) Homepage Journal

    which is the primary reason why not to buy one. The zoro cards, especially ethernet can be hard to come by, so unless you get a loaded one... well it's pointless.

    I've also had issues with bus noise by maxing out a 2000 with a bridge board, 2065, 68038 upgrade, and ram card. It really was incredibly unstable.

    The 2000 has the same CPU as the 500, and 1000. It really was a pointless model. The 3000 and 3000T's are much nicer. And I should add the even a bare 3000 is far more stabler than a loaded 2000.

    The other issue now is WinUAE is so good, it can run BSD, AMIX, along with all the software from the Amiga heyday. Considering how funky old machines can be, why even bother?

  • Re:In other words (Score:4, Informative)

    by MindPrison (864299) on Monday July 21, 2014 @12:49AM (#47498327) Journal
    Well, Used Amigas are in fact notoriously expensive, as much as I love Amiga...I've never truly understood why Amiga lovers wants so much for their old beloved computers, for example - Amiga 4000 sells in Scandinavia (err...they TRY to sell them...) for around 600-2000$...I kid you not! You can pick up an Amiga 500 for around 100$ so that's still affordable if you want to play SuperFrog or watch some cool demos from the glory days of the DemoScene. The action is found on the AGA platform though (A1200 - A4000)
  • by Anonymous Coward on Monday July 21, 2014 @04:37AM (#47498837)

    For most applications it is completely unimportant.
    To my knowledge this only matters for demos. Among those it is very common to turn off the system and make assumptions of how the cache works.
    A trick that sometimes is used on 060 is to assume 16-byte cache-lines on 16-byte boundaries and use a tst.l from a long-address that spans two cache-lines.
    As long as the condition codes aren't used the execution won't be halted by the fetch. That way you can make sure that the CPU reads in data ahead of time so that it already is loaded to the cache when you use it.
    Interrupts and task switching doesn't really happen often enough to make tricks like that useless even if they are enabled.

    For the 020 there is no data cache to worry about. Instead there is a 256-byte instruction cache. This means that it is common for situations to occur where you can split a loop into several sections where each section fits in the cache.

    Anyway, the point is that since the CPU was more or less fixed the Amiga demoscene were able to make assumptions on how the cache and pipeline works and would optimize accordingly. This means that if you want the emulator to run everything at the right speed you have to emulate the cache.
    For regular applications you just want to run things at the fastest speed possible and games written according to Commores guidelines will work regardless of speed but might suffer from more or less stutter depending on the emulator.

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