Dummies question: what are Gigascreen and multicolor?
ZXNet echo conference «zx.grafix»
Hello fan
Why once every half frame? Hardware gigascreen - this is every line so that
flashed less. And “once every half frame” can also be set to interrupt.
Hello Vitamin
Vit> ...eats CPU time....
It doesn’t just eat, it actually devours you completely... :)
Hello, The Exploited
In the hardware you had to ask, there should be diagrams there (search by eroglyphs
EFF7).
Hardware Multicolor
Attribute per byte (two colors for every eight horizontal dots). Screen
memory area - #4000-57FF (standard screen without attributes). Region
attributes - #6000-77FF . Bits 6 and 7 in the attributes are responsible for “paper brightness” and
"ink brightness" Second screen addresses - #C000-C800, attribute addresses
second screen #E000-E800.
Hardware GIGASCREEN
Hardware cyclic switching between screen memory areas (first and
second).(once every half frame)
Hello BYTEMAN
Gigascreen is a mixture of two standard Spectrum screens. As a result
It turns out to be a clever palette. It’s easy to do—alternate once during an interruption
the displayed video page (main or additional).
The essence of multicolor comes down to the fact that the video adapter, when rasterizing the line
pixels each time reads the attributes of the corresponding familiarity. If in
in the rasterization process, replace these attributes, then you can achieve more than 2 colors
to a familiar place. Also, in addition to changing attributes, you can change the video page.
Disadvantages - consumes CPU time, is time bound (because of this, it varies
works on different Spectrum models).
Hello, The Exploited
The> in many demes-intras, during the output of the MC, the calculation itself also takes place
The The> effect is a prime example of rotozoomer in EYEACHE
Is this the anime that is shown? :wink;
Bright; an example of this is the demos from Brainwave; tryptomine; Dream and Stellar Contour..
Hello, key-jee
no need to lie
key> Which anime is shown?
did you look at the code? free
key> Stellar Contour..
and here, just during the output of the mcolor, nothing is done except itself -
all calculations are carried out during the rest of the free time
Hello, rasmer
ras> It doesn’t just eat, it actually devours it completely...
why is this? in many demos-intras, during the withdrawal of MC, the calculation itself takes place
effect - a vivid example of rotozoomer in EYEACHE
Hello Lethargeek
“Once per half-frame” (25Hz) this is through lowercase (one screen on an even field,
the other on odd), int is generated once per frame (50Hz).
This is exactly what I meant.
Hello Vitamin
What other perversions exist with a standard screen? 3color? as I understand it
are there 3 RGB screens? They just take turns switching via int or something
tricky order and timings?
And probably the main question is, is it worth it and, if so, in what situations?
use these modes in games?
As I understand it, 3C is best suited, for example, for portraits of characters a la
Mortal Kombat, and multicolor for displaying pictures?
Hello fan
fan> "Once per half frame" (25Hz) this is through lowercase (one screen per
fan> even field, another on odd field), int is generated once per frame (50Hz).
fan> Actually, this is what I meant.
Probably the opposite - a frame 25 times per second, a half-frame - 50 times per second...
You can see it very clearly on TVs if you take the tuning table with fine
horizontal stripes - they will flicker with a frequency of 25Hz, since
fall into one of the half-frames.
The same can be done on spec if you switch screens in the internet and put
different pictures on the screens (this is often what effects do).
Hello BYTEMAN
BYT> Is additional hardware needed to create these modes???
If this is really necessary, then it definitely needs to be done in hardware.
Personally, I don’t see any point in this, the only thing that represents
Of interest is the 16 colors per dot mode from AlCo.
Hello NovaStorm
CHR> Probably the opposite - frame 25 times per second, half-frame - 50 times per
CHR> second...
50 is two half frames = one frame.
Nov> They just take turns switching by int or something tricky
Nov> order and timings?
In full-screen mode, two screens are used + one is thrown up by software,
it’s scary to look at, but not because of the flickering, but because of the way it ends
pictures...
Nov> multicolor for displaying pictures?
You'll get tired of drawing under this %) If you just convert it.
Hello NovaStorm
Is additional hardware needed to create these modes???