"Aleste 520EX" - does anyone ever heard about this computer??

Resident (45)

06-11-2007, 11:01

Two more video of MSX games
KingValley I
http://www.youtube.com/watch?v=JN_d26Ve1FA
VampireKiller
http://www.youtube.com/watch?v=KIOLoaMzYe8
:)

Por jltursan

Prophet (2619)

06-11-2007, 12:35

They are extremely dark...

Por Manuel

Ascended (18844)

06-11-2007, 13:06

yes, they are quite dark... But it's amazing to see a software emulated MSX2 VDP on a 8MHz CPU! How can this be done???

Por Valeriya

Resident (45)

06-11-2007, 14:15

They are extremely dark...

I found a bug. Color conversion was
R = (color & 3)<<2
G = (color & 3)<<4
B = (color & 3)<<6
So for max level of component 3 the R equal 0xC0 that is far from high level
I convert code to
Byte r = ((val & 0x30)>>4)*(255/3); // isolate colour value
Byte g = ((val & 0x0C)>>2)*(255/3); // isolate colour value
Byte b = (val & 0x03)*(255/3); // isolate colour value

Maybe I will update movies later.

Por jltursan

Prophet (2619)

06-11-2007, 14:36

But are they really emulated?. IIRC they were patched to work as closely possible of the original VDP; but always working over the Aleste hardware.

Por Valeriya

Resident (45)

06-11-2007, 14:47

Well I have decision does not update YOUTUBE movies. Big hussle but not so many reasons. It is readable and enought. What about source and binary emulator I updated it...

jltursan right. Game bios patched to use software virtual VDP.
I wrote few details at
http://aleste520.narod.ru/html/vdp_emulator.html

Read after 'Example The VampireKiller game is a 128KB ROM. Aleste version has 3 files: '

Por Manuel

Ascended (18844)

06-11-2007, 14:57

The background of the Konami logo animation should be white. It's quite grey now, that's why we say that the video is quite dark.

Por Valeriya

Resident (45)

06-11-2007, 15:27

The background of the Konami logo animation should be white. It's quite grey now, that's why we say that the video is quite dark.

It is seems gray cause emulator draws interleaved image, each second line is black.
Want ask me why? Pleas do not do it.
So gray screen is not aleste's problem it is emulator's problem, or somthing at emulator could be configured or there is my bug at the code. I do not know.
So if emulator will done well the image will be white

Por Valeriya

Resident (45)

06-11-2007, 15:45

The background of the Konami logo animation should be white. It's quite grey now, that's why we say that the video is quite dark.

Whell I have update emulator where add suport of rendering style 1.
After switched rendere to this mode (at cfg file)

scr_style=1

With this style each line rendered 2 times. So no black lines between. Then image bright now. As I said before it was at the emulator but not at Aleste side.

Por Valeriya

Resident (45)

06-11-2007, 20:44

I have update game moves. More easy find it here http://aleste520.narod.ru/html/vdp_emulator.html