SATISFAC.ZIP [1/4]

ZXNet echo conference «zx.spectrum»

From Vladimir Yudin To All 25 January 1998


Hello Dmitriy!

24 Jan 97 10:36, Dmitriy Sazonov wrote to All:

DS> We managed to emulate the Speck screen in text
DS> mode ..... (for those who don’t believe, see the source). So
DS> it is possible to make a Speccy emulator (with multicolor) which will not
DS> slow down on four, and with hardware emulation
DS> of the second screen !!!!
Bravo! The idea is very original. But it is not without its drawbacks: in the emulation condition there is no time to catch the return stroke of the beam for each line and
you can easily skip it.

But! For a VGA card, you can set the vertical size of characters (CRT 09) -
even in one line!! Do you understand? All that remains is to double the pixel size vertically and horizontally, which is also implemented in hardware.
A Spectrum screen with a border will take up (256+48+48)*(192+48+48)/4=25344,
which will allow you to organize two pages.

DS> To Yudin: maybe you can make this mode for yourself???
It’s very possible. This will give a 4-fold reduction in video memory and
the absence of 1152 pins per port per frame for switching planes.

Sincerely
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