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- dblSCAN 4000
-
- Price: £200
-
- Developer: Lincware Computers Ltd
- Po Box 25, FN-10300 Karjaa,
- Finland
- tel: ++358 50 557 3696
-
- Supplier: TBA
-
-
-
- Looking to play games on cheap PC monitors? This new Finnish
- video card could be the answer.
-
-
- Believe it or not, but there are disadvantages to owning a
- Big Box Amiga stuffed with processor acellerators and
- graphics cards. Take my A4000 for example. I'm quite chuffed
- that I have a Picasso graphics card inside. The Picasso can
- display a screen of 1024 by 768 pixels in 24 bit colour, and
- I use it in 800 by 600 mode with 256 colours for a Workbench
- display. It works very well indeed -- it's a lot faster than
- the standard AGA display and most serious application
- software works perfectly.
-
- However, in order to take advantage of the new video modes
- and resolutions offered by the Picasso, I've had to buy a
- SVGA style monitor -- it's the sort that would work on a PC
- or Apple for example. It gives an excellent picture, but
- sadly it isn't compatible with most of the standard Amiga
- screen modes. The Amiga likes to work at a video friendly
- refresh rate of 15kHz, whereas PC style SVGA monitors like
- to operate at 31.5kHz. Give a 15kHz signal to a 31.5kHz
- monitor, and nothing happens. This means that my SVGA
- monitor can't, display PAL or NTSC screen modes. (On the
- otherhand, unlike some SVGA monitors, it will however
- display dblPAL or Multiscan Productivity modes.)
-
- Most application software can be asked nicely (or not so
- nicely) to change video modes from a stanard PAL or
- Interlaced PAL to the custom Picasso graphics modes. In this
- way I can still use software such as Imagine, Final Writer,
- MusicX, Cygnus Ed and others on my rock steady and very quick
- 800 by 600 display. Makes you sick, doesn't it?
-
- Here however, is my problem. In selling my soul to gain the
- higher graphics resolutions, I've said goodbye to the vast
- majority of Amiga games software and demo disks. These
- programs usually take over the Amiga chipset completely and
- entirely, before my Workbench utilities have a change to
- upgrade the screen mode into a SVGA friendly refresh rate.
- They pump out 15kHz video, and the result is that when I
- load Arcade Pool, I can't see a thing on my nice big
- monitor. One solution would be to use a multiscanning
- monitor capable of syncing down to 15Khz as well as
- supporting the 31kHz modes, but when I tried the Microvitec
- for a while I wasn't overly impressed with the picture
- quality.
-
- The Good News
-
- The Good News comes in the form of the A4000's video slot.
- Inside the Amiga is a slot with all the signals from the
- video chips. Fitting delightfully into this slot is the
- dblSCAN 4000 card from Finnish Amiga fans, "LincWare
- Computers". The dblSCAN takes the PAL (or NTSC) video signal
- directly from the video bus, and re-outputs it at an SVGA
- friendly 31.5kHz. At the back of the card is a standard 15
- pin socket, and when I plug in the monitor I get a
- wonderfully steady picture. Time to load Alien Breed 3D II
- again!
-
- Even better, I can connect the output of the dblSCAN card
- directly into the pass-through input connector of the
- Picasso card. This means I don't need to mess around with
- swapping cables depending on what software is running. If a
- screen display can't be converted from Workbench, it will be
- up-rated by the dblSCAN hardware and display anyway.
-
- As this conversion is all handled by hardware, there is not
- special software to install or use. Everything is handled
- totally invisibly.
-
-
- The Bad News
-
- There are only a few snags with this smart piece of
- hardware. Unlike the Power Computing's ScanDoublerII
- hardware, this Finish kit will deal only with high
- resolution PAL and NTSC screen displays. It won't de-flicker
- Interlaced displays such as 640 by 512 PAL screen, nor will
- it display a Super High Resolution PAL screen in any useable
- form. This is presumably because the card contains about
- half the amount of expensive video RAM compared to the Power
- Computing card, and this in turn keeps the price down. The
- dblSCAN also lacks the very useful Composite VHS/SVHS video
- output which the Power card offers.
-
- Apart from these shortcomings, there isn't a great deal more
- to say about dplSCAN. It displays all ordinary PAL screens
- very nicely (although I noticed a little corruption in the
- lower right corner once or twice) and the price is fairly
- reasonable. It's a perfect way for A4000 owners to make use
- of cheap SVGA class monitors for Workbench use, and yet
- still regain the ability to play games and demos. Combined
- with a graphics card it makes the Amiga even more flexible
- when dealing with graphics.
-
- If I was depending on a scan doubler to enable me to use
- certain application software which works best in PAL, I
- think I would consider the Power Computing card. Although it
- is twice the price, it also de-flickers an interlaced
- display which means a steady 640 by 512 is possible. The
- dblSCAN can only provice a 640 by 256 display. However,
- application software this stubborn is rare, and for game and
- demo use a non-interlaced display is perfect. If you have
- the money to spare, it's the easiest way to get some fun
- back into your Amiga.
-
-
-
-
-
- dblSCAN 4000
-
- For Amiga 4000 only
-
-
- ease of use: 95%
-
- It's true plug and play -- a totally hardware solution, with
- no software or even instructions required.
-
- performance: 80%
-
- Steady PAL or NTSC high-resolution screens, although
- slightly dark and with (very) occasional glitches.
-
- value for money: 75%
- It's tricky to rate -- a graphics card would be a better
- buy, but won't achieve the same results.
-
- overall: 85%
- A deceptively straight forward gadget that all serious
- A4000's owners could do with.
-