06 July 2019, 17:42 | #241 |
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From day one or later/earlier?
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06 July 2019, 19:02 | #242 |
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07 July 2019, 07:34 | #243 |
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Ok, A1200 was allmosto totally crap, but if you look carfully OCS chip-set, it seems to me an unfinished project. If we think about 2 incredible pitfall: chip-sets' register and trap door ram under bitplane dma scheduling! Come on! Or commodores' engenieers drunk to much beer, or like I said, was unfinisched project.
With that fixes, copper could allmost doubling it's instruction rates, especially if it and blitter hey had been able to access to drap door ram. And this fixes don't seems to me to much costy... |
07 July 2019, 07:35 | #244 |
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07 July 2019, 11:32 | #245 | |
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In all seriousness, though, I'm sure every computer and console design of the 1980s and 1990s had shortcomings and flaws. I've heard even certain PC configurations to this day can have severe bottlenecks, so this "streamlining and efficiency" aspect is never truly going to be achieved. |
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07 July 2019, 12:23 | #246 | |
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07 July 2019, 13:28 | #247 | |
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I mean, seriously - aside from those who were rich as hell, how many people powered up their A1200s and though "well this is a pile of crap" instead of getting down to some serious AGA gaming? |
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07 July 2019, 13:45 | #248 | |
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07 July 2019, 14:58 | #249 | |
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Of course, in reality the A500 was essentially a heavily cost cut A1000 with minor changes. This was needed as the A1000 was reportedly really expensive to make and as such couldn't be offered at an appealing price point for mass market sales (which is what Commodore wanted/needed - they wanted the Amiga to be the next C64 and were losing money because of the A1000's low sales at the time). The trap door RAM slot was one of those changes and as I understand it, the reason it works the way it does is because it was much, much cheaper to do it this way compared to what Sandruzzo suggested. Plus, if you really wanted fast memory the side slot of the A500 already offered this option. It's just that everyone who expanded their A500 elected to use the cheaper trap door memory. Later revision A500's actually can access trapdoor memory through the chipset (making it essentially chip RAM), though the processor doesn't understand this (due to how the memory is mapped) and as such still reports it as fast RAM. This is why the Indivision ACA500/ACA500+ could give you 1MB chip RAM without altering anything on the main board. But this is merely cosmetic - you can write programs accessing 1MB of chip memory on any A500 with the correct Agnus and board revision (i.e. all with revision 5+ I think). Though obviously you'd lose compatibility with the older A500's if you do so, which is probably why no one did this. As for the registers, I'm not a hardware engineer so I may have this wrong. But as I understand it, what Sandruzzo asks for here would've essentially required two busses on the A500 board: one for the registers, one for chip RAM. Well that or have a 'double ported bus' such as used by VRAM. These things might be possible, but would be rather expensive. The real irony here being that the A1200 trap door slot fixed all of these things as well as essentially remove most of the chip RAM slow down when using higher numbers of colours in games, but he still doesn't like it |
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07 July 2019, 15:02 | #250 | |
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Is there any speech limitation? We're talking about a machine, come on! So stop this silly, stupid, bullshit about me. And I repeat a1200 bullshit machine, oops sorry, missed opportunity. OCS unfinished project. Ocs, by the way, isn't pure 16bit, since audio is 8 bit, color palette 12-bit... P.s. even though, I'm talking about this on Amiga, I still love this machine. Last edited by sandruzzo; 07 July 2019 at 15:13. |
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07 July 2019, 15:15 | #251 | |
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As for the A1200: you don't have to like it, but calling it 'bullshit' is... Well.. Bullshit. |
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07 July 2019, 15:19 | #252 | |
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Btw, I my opinion 16bits fetches don't mean fully 16bit machine. Don't get my wrong, like 68000 which is 16/32 bit processor. |
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07 July 2019, 15:29 | #253 | ||
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Got even better when I found out that putting more memory and a faster processor in the A1200 was much cheaper than doing so for the A500. Quote:
Your definition is, IMHO, far too strict. Only systems everyone calls 32 bit actually qualify under your rules. And personally, I don't buy that a Playstation is a 16 bit machine. Last edited by roondar; 07 July 2019 at 15:31. Reason: Edit: a more complete reason why I loved the A1200 |
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07 July 2019, 15:33 | #254 |
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@roondar
I think in the surface A1200 back in the day seems a good one, but when you start to do stuff on it, it's heavily limits start to show, and that, when A1200 stop to seems a good one. |
07 July 2019, 15:35 | #255 | |
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I think you just need to choose better meaning words, when you call a machine totally crap/useless it can come across as offensive (especially when you come across people like me who have invested a lot of time in the machine). |
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07 July 2019, 15:38 | #256 |
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Well, I didn't experience it like that at all. It was so much nicer to use for me than the A500. Even before I put in the Blizzard 1230MK IV. But if that's your opinion then that's fine - we don't all have to agree .
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07 July 2019, 15:40 | #257 | |
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I never, and I repeat never personally attacked someone here, nor even occasionally |
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07 July 2019, 15:47 | #258 |
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I was talking about lack of horse power on Blitter and Copper. 68020 and 2 mb of ram were really good! But a little bit of "fast" mem on standar A1200....
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07 July 2019, 15:49 | #259 | |
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07 July 2019, 15:51 | #260 | ||
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