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- * STatus Disk Magazine *
- * Issue 1, Volume 1 *
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- John Russell Innovations' 4096 Color Enhancement
-
-
- Amidst a lot of misinformation about its true capabilities,
- JRI released the ST4096C video board for the ST/MEGAs as a path to
- enhanced video capability.
-
- Initially, many thought the board allowed you to use 64
- colors at once, from a palette of 4096 colors. This however was
- not the case.
-
- Now to clarify one thing, this review of the ST4096C is done
- by someone who has never owned it, but has "played" around with it
- enough to get a pretty good feel for it at local computer stores
- (in particular ATN out in Gaithersburg) and collating every iota
- of documentation from various owners of the ST4096C (these people
- know who they are!).
-
- Ok, here's what you can do with the ST4096C:
-
- 320x200x16 colors from 4096
- 640x200x4 colors from 4096
-
- 640x400 monochrome is not, at this time, known to be the new
- "dual color" 640x400 like the STE/TT computers. Judging from how
- it is purported that this enhancement is identical to the STE/TT
- modes, it is reasonable to assume that it will offer similar
- capabilities, but at this time, I have not been able to test this.
- One reason is, it would require a color 640x400 (multisync?)
- monitor to find out.
-
- The JRI board works on a simple principle. The ST video
- Shifter's chip is set to look for the RGB values of each palette
- entry in the format of:
-
- Bit Number Not Used (X)/Used (*)
-
- F X
- E X
- D X
- C X
- B X
- A *
- 9 *
- 8 *
- 7 X
- 6 *
- 5 *
- 4 *
- 3 X
- 2 *
- 1 *
- 0 *
-
-
- What this translates to is, for bits 0-2, we pick the levels
- of blue (0-7, or 8 shades), for bits 4-6 we pick levels of green,
- and for bits 8-A (10 decimal), we pick the levels of red.
-
- What the JRI board does is "tacks on" a second video chip,
- identical to the original Shifter video chip you have right now,
- which is preset to modify the output of your original video chip
- depending on the status of particular bits. This is achieved by
- making it react to 3 new bits in the palette data, like so:
-
- Bit Number Not Used (X)/Used (*)/Used by JRI (J)
-
- F X
- E X
- D X
- C X
- B J
- A *
- 9 *
- 8 *
- 7 J
- 6 *
- 5 *
- 4 *
- 3 J
- 2 *
- 1 *
- 0 *
-
-
- What this means is that the JRI board will tack on another 8
- possibilites for each color's shade, making a grand total of 16
- possible shades of each color, and letting your palette reach 16^3
- (16*16*16) or 4096 colors.
-
- Now, for those who want more than 16 colors, it is somewhat
- disappointing that we won't exactly have drastically improved
- video. However, in some of the demos that come with it, there is
- a neat "rainbow" showing off the smooth shading capabilities of
- this board. When I called about the boards way back when they
- were first shown at WOA in Dearborn, I was told that Antic and
- some other developers were contemplating making programs, such as
- CAD 3D capable of using this enhanced palette.
-
- However, to quantize how much use you will get out this board
- compares to your own personal uses. At $49 for the actual board,
- $25 (suggested list) for the 2nd video chip, and a bit more for
- installation by a dealer, you could easily spend $80-$100 to get
- this board. Considering current software will ignore its
- presence, this is a somewhat uncomfortable purchase for someone
- who isn't sure this is the right move yet. Even now, I still am
- torn between deciding whether to buy one of these boards and write
- for it, or not. In fact, since I've had the specs for quite a
- while, I have written a "cheesy psuedo-DA" to "help" the CONGO.ACC
- for the JRI board in its work. However, although I would
- encourage a programmer to explore the possibilities of it, I can't
- truthfully encourage the average user that this board is the best
- move for them.
-
- JRI however, does minimize some of the problems we users do
- have with wanting immediate gratification with our hardware
- purchases. When you buy a 16mhz board, for example, all of your
- programs should have a noticeable speedup. With this, it is
- "invisible" to ordinary applications, so what do you do? Well,
- JRI has patches for NeoChrome v.5 and v1.0 that let you do 16
- color masterpieces with the full 4096 color palette at your
- fingertips. They also provide source code for programmers to
- peruse at their leisure, so that more software will be written for
- it (and thus, the STE/TT?).
-
- Overall, I do have to commend JRI for their hardware
- expertise. This year alone, they've produced more hardware for
- the ST (as I write this) than any other company, including Atari
- Corp (Wonder why?)! However, this board will either have to come
- down even lower in price for the standard user to buy it, or there
- will have to be enough software that utilizes it to make the
- purchase worth it. I suspect that with the STE/TT compatibility,
- if these two new machines "force" their way into developer's
- hearts, the JRI ST4096C will work its way into a lot of ST owner's
- machines. Now all we need is the new STE/TT digital sound chip,
- JRI! (and make it affordable!)
-
-
-
-