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- {fA4000 report {a put the Amiga back on the
- technological leading edge.
- Denny Atkin takes us through the
- advanced features of Commodore's Although similar in size and style
- top-end Amiga. to the A3000, the A4000 is a
- completely new design featuring what
- The view zooms in on a star-filled Commodore calls the Advanced Grapghics
- sky. Twisting and turning, we pass a Architecture. Gone are the familiar
- colourful nebula, then zoom in at 30 Agnus and Denise chips: they've been
- frames a second on a planet, a replaced by Alice and Lisa, known
- multihued gas giant. A fanfare plays together as the AA (Advanced Amiga)
- in the background as the credits pop chip set. While the AA chips are
- up on-screen. {eWelcome to Amiga: {f The{a upwardsly compatible with the orginal
- {fNext Generation.{a Amiga chip set with ECS, they add a
- number of new graphics modes that put
- If you're looking for an Amiga that Amiga graphics a step ahead of Super
- can do warp speed and do it in style, VGA.
- the new A4000 is for you. Equipped
- with a 25-MHz Motorola 68040 No longer are you stuck with only
- microprocessor, a new graphics chip 4,096 colours to choose from - the AA
- set and a 32-bit expansion bus, chip set provised a full 24-bit
- Commodore is counting on the A4000 to palette (16.8 million colours). All
- of the original graphics modes are 200 or 400, ECS VGA 640 * 480 or 960,
- supported, along with the new 64-, Super72 800 * 300 or 600, and
- 128-, and 256-colour modes. In SuperHires 1280 * 200 or 400. However
- addition, there's a new enhanced HAM you're no longer limited to 4 or 16
- mode that supports over 256,000 colours in the highest resolution
- colours, depending upon resolution modes - you can now display 256,000
- (Commodore says that with certain colour HAM in any mode, even 1280 *
- monitor and screen mode combinations, 400! There's also a feature called
- you could feasibly display all 16.8 mode promotion that eliminates the
- million colours simultaneously {e[Yes{a need for deinterlacer circuitry.
- {ebut Commodore are talking about a 256{a
- {e* 256 inch monitor in Hi-Res! -Ed]).{a For instance, as 640 * 400 screen
- cam be automatically opened in ECS VGA
- Since the enhanced HAM mode now 16-colour mode instead of standard
- sports 64 24-bit base colour interlaced Hi-Res. (Of course,
- registers, creating pictures without interlaced modes are still available
- the finging common in the original HAM for video work.) The AA chips have
- mode is relatively simple. full 32-bit access to memory, which
- allows them to perform many operations
- The AA graphics resolutions are the more quickly. Displaying a 16-colour
- same as those available in ECS. hi-res, overscan, interlaced Workbench
- Lo-Res 320 * 200 or 400, Hi-Res 640 * screen no longer causes the rest of
- the system to slow down. Note that access considerably.
- you'll need a VGA or multiscan
- monitor, such as Commodore's A1960, to Unlike previous Amigas, the A4000
- utilise these new graphics modes. has no microprocessor on the
- motherboard. The 25-MHz 68040 is
- Integral to the {eAdvanced Graphics{a contained on a card that plugs into a
- {eArchitecture {a is version 3.0 of the 200-pin CPU slot on the motherboard
- Amiga operating system. This enhanced (This slot is physically and
- release includes full support for the electrically compatible with the
- AA graphics chips, as well as a number A3000's processor slot; it's likely
- of really cool operating system that the 040 card in the A4000 is
- functions for handling attatched identical to the one used in the
- screens, mode promotion, dynamic A3000T/040.) This has interesting
- palettes, hi-res sprites, Intuition implications for future Amiga models.
- double-buffering, and hypertext. Once I wouldn't be surprised if future
- 3.0 feature that's not really that AA-based Amigas with different
- useful but is quite visually processors utilise the same
- impressive is the ability to use IFF motherboard and basic components as
- pictures as backdrops on your the A4000. (The fact that the case
- Workbench screen. There's also a new identifies it as the A4000/040 seems
- file system that automatically caches to back this theory up.) Just change
- directory entries, speeding up floppy the processor card, amount of RAM,
- hard drive capacity, and number of in the A3000T; there's room for
- expansion slots, and you've created a mounting a second drive internally.
- new Amiga. Unlike the A3000, the A4000's second
- drive bay is 5.25" in size, so you can
- Other specifications include four mount a CD-ROM or tape drive
- 32-bit Zorro III expansion slots, internally. Of course, the A4000
- three of which have in-line IBM AT ISA retains the external expansion ports
- connectors whilst the other has an found on all Amigas, including serial,
- in-line video slot. As in the A3000, parallel, RGB video, external floppy,
- the slots are mounted horizontally on stereo audio, keyboard, mouse, and
- a card that plugs vertically into the joystick ports. The pinouts on the
- A4000's motherboard. Memory is now keyboard port have changed, but the
- added using industry-standard SIMM other ports should be fully compatible
- packages rather than the with those on the earlier Amiga
- difficult-to-install ZIP RAMs used on models.
- the A3000. The A4000 ships with 2MB
- of Chip RAM and 4MB of Fast RAM: you Although the A4000 is clearly and
- can add up to a total of 16MB of Fast incredible machine, a couple of poor
- RAM on the motherboard. design decisions will force
- performance-minded users - who, I
- The A4000 comes with the same, assume, are Commodore's audience for
- 1.76MB high-density floppy drive found this powerhouse - to add peripherals
- almost immediately. While most of the limited to hard drives and supports
- A4000's design screams speed, only two devices. Even worse, IDE's
- Commodore chose not to equip the 16-bit interface has less than half
- machine with the blazingly fast 32-bit the data transfer speed of a good SCSI
- DMA SCSI controller found in the implementation.
- A3000, but ti instead use IDE
- circuitry similar to that used in the On the plus side, {eCommodore{a
- A600. That probably saves Commodore a {eengineers {a are working overtime to
- few pounds in manufacturing the finish the mercuric A3090, a Zorro III
- machine and will save you £10-£20 when 32-bit SCSI-2 controller, which was to
- you go to add a new hard drive, but be in time for the machine's release
- the tiny monetary advantage is but has sadly yet to emerge.
- eclipsed by the severe restrictions
- imposed by the IDE interface. Also noticeably missing is any
- support for improved sound. The good
- The SCSI interface found in the old {ePaula chip {ais still around,
- A3000 supports up to seven expansion providing the 8-bit, four-voice stero
- devices simultaneously and allows the sound we've become accustomed to over
- instant addition of devices ranging the past seven years. {fCommodore {ahas
- from CD-ROM drives and tape backups to talked in the past about adding
- DAT drives and scanners. IDE, on the advanced digital signal processor
- other hand, is almost exclusively (DSP) technology to the Amiga series.
- The A4000 has an internal audio hookup the other hand, was beautiful only on
- for mixing in stereo audio from the inside. Well, it appears that
- internal add-ons, so a DSP could be Commodore must have had some left-over
- added later. But like SCSI, it seems cases from their recently-discontinued
- like an option that should have been a European PC line, because the A4000
- standard in Commodore's has little to distinguish it from the
- top-of-the-line machine - especially average PC clone. Only the sloping
- as 16-bit sound and DSP chips are front panel and the Amiga logo
- starting to infiltrate the MS-DOS embossed on the case give it a feeling
- universe. Even Atari's last-ditch of identity {e[what about the retention {a
- effort at staying in the personal {eof the crude mouse? -Ed].{a Still,
- computer market, the Falcon 030, has a it's what's inside that counts.
- Motorola DSP right on the Computer's
- motherboard. Even with these ommisions, and the
- surprising lack of a PC-MCIA slot, the
- There must be a rule that only A4000 still stands out as a major
- odd-numbered Amigas can be really technological advancement.
- cool-looking. The original A1000 is
- second only to the MindSet in {fDenny Atkin{a
- attractiveness of design, and the
- A3000's slimline case certainly graces {fEd: I've left most of my comments to {a
- any desk it sits on. The A2000, on {fthe end because I'd hate to ruin your {a
- {fbeautifully-written report with my It's been suggested to SR that one of
- burblings. the Amiga designers was a homosexual!
- The designers names the chips after
- Although, obviously, it would have former girlfriends, Agnus, Denise,
- been nice, {eCommodore {fare reported to Paula. Fine. Until we come to
- be hard at work on a 16-bit, Gary...
- eight-voice soundchip which will be
- compatible with both the {eA4000{f, and
- Commodore's second new baby, the This is a special {aSatanic Rites{f
- A1200. feature, click on the index to select
- another article in our forum for
- Although by the release of this Commodore's new machines.
- machine {eCommodore {fhave proved that
- they will comntinue to support their
- Amiga line, the substitution of {eIDE{f
- circuitry brings some comfort to those
- of us who would not be overcome with
- joy if the day were to come when
- everyone moved to {aPC {fand all of our
- expensive Amiga peripherals became
- redundant.