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- From: comp.sys.amiga.reviews Moderator <amiga-reviews@math.uh.edu>
- Organization: The Amiga Online Review Column - ed. Jason L. Tibbitts III
- Subject: REVIEW: Impact Vision 24
- Keywords: hardware, graphics, 24 bit, color, video, commercial
- Path: karazm.math.uh.edu!amiga-reviews
- Distribution: world
- Newsgroups: comp.sys.amiga.reviews
- Followup-To: comp.sys.amiga.graphics
- --text follows this line--
- [This was sent to me by Charles Hill of AMReport fame. The last working
- address I have for him is: Charles Hill/InfoTrak
- <76370.3045@compuserve.com>. -JLT3]
-
- Great Valley Products' Impact Vision 24 (IV24) board is a dual-slot
- expansion board for the A3000 or A2000 series of computers. It is
- designed to provide 12 or 24 bits of color information to an Amiga
- screen; 12 bit, non-HAM, live picture-in-picture (PIP) and either
- 12 bit or 24 bit real time frame grabbing from a separated RGB video
- source.
-
- HARDWARE
- --------
-
- The IV24 package comes in two versions: A2000 and A3000. The A2000
- package includes an extra cable to hook the board up to the A2000's
- video slot. Both versions include the IV24 internal expansion card
- and a multi-function cable.
-
- The IV24 card is designed to fit in the A3000's Zorro/Video inline
- slots. The two card-edge connecters look similar to an ISA-AT style
- card, though much larger. Beta test boards had visible jumpers on
- the back of the card and came without an end brace to screw down to
- the machine, but final release boards had no jumpers and the proper
- end brace.
-
- Writing on the board says: "Great Valley Products"
- "Amiga 3000/PVA Revision IV"
-
- The board has a very polished look. It is a "done" product.
-
- The end of the board has a 31 KHz output port, a multi-input port and
- a three position switch. The 31 KHz output port can be software
- switched down to 15 KHz and is designed to hook to your monitor. The
- IV24 board has the ability, unlike Commodore's flicker-unit, to
- de-interlace/scan double 15 KHz output.
-
- The multi-input plug hooks up to a special cable supplied with the board
- and provides four input connecters and two output connecters. On the
- input side, there is separated Red, Green, Blue and Composite RCA-style
- plugs. For output, there is an S-VHS connecter and an RCA-style composite
- out plug. This combination allows for output to a composite destination
- (television, VCR, etc.), an S-VHS receiver (television, VCR, etc.) or
- RGB (monitor, film recorder, etc.)
-
- I had no occasion to test the composite or S-VHS output.
-
-
-
- INSTALLATION
- ------------
-
- The IV24 card is designed to fit in the A3000's inline Zorro/Video
- slot (topmost slot). A connecter cable and adaptor plug is provided
- for A2000 owners.
-
- The card slides in and screws down smoothly in an A3000. It is a tight
- fit, but from what I understand all A3000 cards are a tight fit. On an
- A2000 there is a bit more work.
-
- The A2000 model plugs into a Zorro slot and then a cable is run from a
- special connector on the board over to the video slot. The manual
- recommends running the cable *over* the power supply until the card
- burns itself in, then reinstalling it by running the cable *under* the
- power cage. To do this, you must physically remove the power cage.
- This is not an experience for the squeamish or for those with machines
- still covered by a warrantee. Have your dealer do it (most charge
- around $30 if you purchased the card elsewhere -- $0 if you got it from
- them.)
-
-
-
- SOFTWARE
- --------
-
- GVP, while selling the unit, claims that the software is all gamma-test
- and still being worked on.
-
- That is an understatement.
-
- The IV24 package includes three commercial software packages: Scala,
- Caligari and MacroPaint; and a host of IV24 utilities: IVPIP, IVCP,
- IVGRAB, IVVIEW, IVREAD and IVCMD.
-
- The three commercial programs are all versions designed to support the
- IV24 board. Of the three, Caligari is the most finished product.
-
-
- MACROPAINT
- ----------
- MacroPaint requires 5 Mb of RAM to run, and it crashes and burns if you
- have less memory. MacroPaint is also the most bug-ridden of the three
- packages. The manual has a nice large "Preliminary GAMMA" stamp on it,
- and they ain't kidding.
-
- MacroPaint's biggest strength (besides being able to work on 24-bit
- pictures in real time <Hi NewTek!>) is it's support for ARexx macros.
- MacroPaint can be controlled via ARexx and can send commands out via
- ARexx. This is very handy for those or us with hordes of memory and
- a program like ADPro sitting in the background.
-
- The memory used for the images in MacroPaint must be contiguous. If
- you want to load a 1.2 meg image, you must have 1.2 megs of contiguous
- RAM.
-
- In normal operations, I have ADPro running with a 1.75 meg buffer (to
- handle 24-bit pictures); DNet running (hooking my A2000 upto the A3000)
- and now MacroPaint.
-
- Now, with ADPro taking 2 megs, MacroPaint taking 5 megs and a loaded
- picture taking another 1, that is a total of 8 megabytes of RAM in
- use already. What happens if you want to load in a second image or
- a full-screen brush? You run out of memory, even on a 10 megabyte
- A3000, that's what! If you want to fully manipulate 24-bit images, get
- LOTS of RAM, then buy some more for extra measure. I recommend at least
- 10 megabytes for any multitasking while running MacroPaint. Having
- MacroPaint send an image to ADPro for manipulation and then getting it
- back is wonderful. With the requirements for contiguous memory, you
- need a lot of RAM to spare.
-
-
-
- SCALA
- - -----
- In truth, I haven't used Scala very much. It looks like a smooth
- program, but it ships on a grand-total of one (I counted twice) disk
- for the IV-24. The regular version ships on 6 or 7 disks! Has GVP
- got some fantastic new compression method I'm unaware of? I don't know
- what's missing but then again I don't have the original version of
- Scala around.
-
-
-
- CALIGARI 2.0
- - ------------
- I haven't played much with Caligari, either. It seems to be quite
- nice and I haven't been able to crash it. Unlike Scala and MacroPaint,
- Caligari doesn't multitask. Like Scala, there is no ARexx port.
-
- Some friends of mine purchased the IV24 board solely because it
- came with Caligari. They had been using Caligari Broadcast with a
- Bridgeboard and a Targa board and wanted to try it out. While they
- are impressed with the product, it isn't upto Caligari Broadcast
- standards. Considering the Broadcast version is thousands of dollars
- itself...no one expected it to be.
-
- Caligari requires an accelerated Amiga with a math coprocessor and at
- least 3 Mb of RAM to run. The faster the better, the more RAM the better.
-
- Caligari does not do ray tracing, but renders in another fashion. Ray
- tracing takes longer, but yields better results. Caligari renders
- quicker age capture,
- output destination, input destination and board-level registers.
-
- Separated RGB input is necessary to do frame grabbing or PIP. Color splitters
- are available, but I used an RGB camera. A color splitter would be
- necessary to capture input from a composite source, such as a VCR. True
- RGB is cleaner and sharper, though.
-
- The IV24 board will provides two banks of 12-bit RAM. This allows for
- double-buffered 12 bit (4096 color) animations or a single-buffered
- 24 bit (16.7 million color) image. 12 bit images are not HAM, but true
- 12 bit.
-
- PIP is 12 bit live video overlayed on a 12 bit Amiga screen. The screen
- can be swapped so that the live video is the background and the Amiga
- screen is in the PIP. The PIP can be resized, moved, zoomed and the
- scale changed. It can be turned on and off and all this can be done
- with a mouse, keyboard or via ARexx. The manual says the PIP can be
- frame grabbed, but so far this function does not work.
-
- Full 24 bit images can be frame grabbed without any problem.
-
- The IV24 has three display modes: full Amiga graphics; keyed source and
- full external.
-
- Full Amiga graphics is just that -- an Amiga display. Full external is
- a direct feed of the RGB signal so you can see what the camera is pointing
- at. Keyed images allow the external video to show through the background
- color (genlocking) OR the live video to show through every color *but*
- the background.
-
- Other software allows direct reads and writes from/to the boards own
- registers and memory; viewing of 24 bit or 12 bit pictures; and frame-
- grabbing.
-
- Everything works to some extent. I cannot seem to get the PIP to load
- from a CLI without crashing, but it loads fine from the WorkBench (or
- the 2.0 wbstartup drawer). Some of the ARexx commands listed in the
- manual are not in the software, or are implemented differently than
- stated. I cannot get the default settings on Frame grabs to save
- properly, so I have to reset them every time I boot the machine (via
- ARexx). Frame grabbing PIP just plain doesn't work.
-
- GVP is aware of the problems and has people working on them. (I know,
- I've called them enough times to get on a first-name bases with half
- of their staff!)
-
- The IV24 board is a great piece of hardware that has a lot of potential.
- Third party support is forthcoming (ASDG will support the IV24 in their
- next release of ADPro in November.) The board *is* a bit pricey, retailing
- right around $2,000 with another $50 to $100 for the A2000 adaptor.
-
- Hopefully this will change soon. Chips & Technologies has introduced a
- new chip that handles full PIP in a computer. The chip is $40 in quantity
- compared to $200 - $300 for the sets currently on the market. Don't
- expect cheap competitors until at least 1992, though.
-
-