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#4801 |
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Join Date: Jul 2020
Location: EU
Posts: 78
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It's easy to judge after several dozen years when you know much more about these computers and consoles than you knew then. At that time, few ordinary gamers thought about blitter, the number of colors in games, etc. The big advantage of the A1200 (as well as the A600) was the possibility of mounting a hard drive and installing Workbench on it, and thus transferring games from floppy disks to the hard drive.
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#4802 | |
Registered User
Join Date: Nov 2021
Location: Utrecht/Netherlands
Posts: 335
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#4803 | |
Registered User
Join Date: Nov 2021
Location: Utrecht/Netherlands
Posts: 335
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#4804 | |
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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What DSP chips were being used in home computers in 1986, when the A500 was designed? The first reference I can find to the Motorola DSP56001 is Steve Jobs' NeXT computer, which cost US$6500 in 1988. Here's a homebrew DSP56001 board for the Amiga made in the 1990's. Doesn't look very complicated, yet how popular did this design become? My 1990's hand made co-processor for my Amiga I don't remember anyone in the Amiga scene talking about DSP at that time (or ever - until now). The earliest expansion card using a DSP chip that I know of is the Video Toaster flyer in 1994, which used an ADSP2115 dedicated to audio record/playback. Seems nobody was interested enough in general purpose DSP on the Amiga to make it worth producing. Therefore I conclude that not having it built in as standard was not 'one of biggest mistakes'. |
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#4805 |
Registered User
Join Date: Jul 2020
Location: EU
Posts: 78
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It was easier and cheaper to buy a 3.5" drive and connect it externally on a signal tape than, for example, to buy a GVP controller for the A500. Let's not forget that there were also versions of the A1200HD.
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#4806 | |
Registered User
Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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#4807 | |
Registered User
Join Date: May 2017
Location: Munich/Bavaria
Posts: 2,425
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(WHDload came much later ...) |
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#4808 | |
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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The A600 actually sold very well when the price was dropped below the A500+. But not having an AGA machine out by then made Amiga fans think nothing was coming. Gould expected it in 1991. The reason it didn't happen then was that the engineers were too busy doing other stuff that didn't pan out. Most of them weren't interested in a low cost replacement for the A500 with enhanced graphics. To make matters worse Commodore had continuous financial problems that limited R&D. All this whinging about Commodore not doing this or that is silly. They came through with the A1200 and it was a great machine. That seems like a miracle when when you consider that they were at death's door way back in 1986 - after throwing bucket-loads of money at the A1000 and not being able to make a profit on it. We should think ourselves lucky for getting what we did. |
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#4809 |
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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FYI, DSP3210 was introduced in 1991.
That's far too late to be part of the Amiga's 'standard configuration'. It wouldn't go into a low-end machine like the A500 because it was cost-constrained and other stuff would take priority. A DSP chip only provided in high-end Amigas was useless. John Carmack still wasn't going to port Doom to the Amiga if the A4000 had DSP. Last edited by Bruce Abbott; 28 May 2024 at 16:35. |
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#4810 | ||
Registered User
Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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Asian exclusive PSX (SCPH-5903 model) has a built-in hardware decoder for VCD. https://www.psxdev.net/forum/viewtopic.php?t=1317 Without an MPEG hardware decoder, the MIPS R3000 CPU @ 33.8 Mhz (33 MIPS) software VCD player can reach 10 fps. FMV's CL450 has an RISC CPU with MPEG-related instruction extensions @ 40 Mhz and 80 ns 512 KB Fast RAM equivalent. DSP3210 @ 50 Mhz (25 MFLOPS, 12.7 MIPS) is designed for "3D and multimedia". AT&T also offers MPEG decoders. https://www.researchgate.net/profile...plications.pdf AT&T AVP-4120C (MPEG) has a RISC CPU with 50 MIPS @ 45 Mhz. Quote:
Argonaut was pushing for mass-produced RISC co-processors. Last edited by hammer; 28 May 2024 at 15:41. |
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#4811 | |||
Registered User
Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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AA3000+ has DSP3210. https://amitopia.com/updated-dsp-321...a-3000-is-out/ Quote:
Bill Sydnes did everything to hobble baseline AGA's general purpose compute power, but has no problems with $50 CL450 chip along with extra 80 ns 512 KB local RAM, two-channel 16-bit audio DAC, and 24-bit video DAC. FMV has chunky pixels in a 24-bit color display. Bill Sydnes made sure this chunky pixels is not accessible to the Amiga gaming. Quote:
AA3000+ revision 1 with surface-mount components is in sync with A300. Last edited by hammer; 28 May 2024 at 16:30. |
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#4812 | |
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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Plenty of games did, especially those that came on a large number of floppy disks (the ones you really wanted on the hard drive).
If more low-machines had hard drives then more games would support them. Therefore it made sense to have a hard drive option in lower-end machines - if it could be done cheap enough. This was possible with IDE, especially 2.5" since it didn't need a big case and power supply. Quote:
When the CPC664 was my main machine I did a lot of cracking, but only to transfer the games I had purchased from tape to disk. Transferring Amiga games from floppy to hard drive had similar purpose, to speed up loading times. But the Amiga's disk drive was efficient enough that most 1 and 2 disk games didn't benefit much from hard drive installation. That meant the hard drive could be smaller because it wasn't clogged up with small games that ran fine from floppies. The Hall of Light lists 1,404 games with a hard drive installer. That might not be 'most' games, but it's a sizable chunk of them. Many of my favorites are on that list. |
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#4813 | |
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Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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Quote:
The problem is PCMCIA's memory-only mode which is used as 16-bit Fast RAM on A600. PCMCIA's memory-only mode impacted Budgie (Buster, 32-bit Ramsey) which has a buffered 16-bit link with PCMCIA. Budgie also replaced the two TTL bridge chips on A600 and four TTLs on A3000. Last edited by hammer; 28 May 2024 at 16:35. |
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#4814 | ||||
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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We wouldn't need c2p if we had chunky. But the Amiga never had chunky so it wasn't a 'standard configuration'. Furthermore the engineers were more interested in high resolution screen modes than support for games. If I was doing ECS I would forget about productivity mode and look at ways to support packed pixels (at various resolutions) and tiled mode (text mode). Quote:
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Bill Sydnes was hired to handle the PC line, but got involved in the Amiga side due to lack of progress in that department. It's not his fault that AGA wasn't out in time for the machines they planned to produce. |
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#4815 | |
Registered User
Join Date: Mar 2018
Location: Hastings, New Zealand
Posts: 2,713
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#4816 |
Registered User
Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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If you read A1200 Rev 1 to 1D schematics, there are noted bugs with older Gayle and newer Gayle without the bugs.
Older Gayle has four workarounds 74 chips. Additional features can impact the rest of the system and delay the product release. |
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#4817 | |||
Registered User
Join Date: Aug 2020
Location: Sydney/Australia
Posts: 1,021
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That's bullshit.
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A590's DMAC presents an 8-bit PC-XT-like interface to a common PC chip like the WD33C93A. A600/A1200/A1000jr/A4000 implements 16-bit AT-IDE. A4000's IDE is the buffered version. Quote:
The core functions for A1200/CD32 are the same as AA3000+ including the same CPU's 7.1 MB/s Chip RAM access. 16bit DAC audio reappearing on CD32 is LOL. A mistake. Fact: Bill Sydnes was fired by Ali for his lies(false promises) and the A600 debacle. IBM was large enough to survive the Bill Sydnes PCJr debacle. Last edited by hammer; 28 May 2024 at 17:09. |
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#4818 |
Registered User
Join Date: Sep 2013
Location: Poland
Posts: 868
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Nope. Those things were widely discussed with a scope very far from A1200 and disappointment anyone could have. That's what offtopic means and you were kind enough (for hammer) to keep that going pretty darn far. It was never about price/performance or typical PC configuration in 93. It was all about a lot of bullS claims, irrelevant informations and bad assumptions.
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#4819 | ||||
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,872
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seem there is some issue with forum - CR/LF is ignored |
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#4820 |
Registered User
Join Date: Feb 2015
Location: Sweden
Age: 50
Posts: 2,974
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