🚀 go-pugleaf

In <1992Aug15.042205.8458@ryn.mro4.dec.com> chungh@armory.enet.dec.com (Henry Chung) writes:

>OK, several people sent me E-mail asking for more infomation on Vblaster.
>Here is a brief description of its features. 

>VIDEO ACQUISITION:
>- software selectable video source from 3 composite video inputs
>-supports NTSC and PAL system

>WINDOWS/OVERLAYING:
>-windows positioning and sizing on sigle pixel boundaries
>-VGA graphics and video overlay via graphics color key (256 keys)

>MASKS:
>-color keying, luminance and chrominance masking

>IMAGE ACQUISITION
>-supports PCX,TIFF,BMP,MMP,GIF,JPEG, and TARGA
>-resolution 640x480 VGA
>-supports up to 2 millions true colors

>-software selectable frame buffer base address (1-15M)

>Video frame buffer resolution
>-1024x512

Hi, (I just deleted a few specs),
so what is the real size of image grabbing ?

Is it grabbing from a PAL source, where there are 576 visible scan
lines only 480 scanlines or 512 ???

Is the horizontal grabbing 640 or 1024 pixels ?


A major bug seems to be the memory mapping, so ypu can only have 12
Mbytes Rams or 8 Mbytes RAM with 16 or 8 Simm slots.
You can't use 4 pieces of 4MB Simms which gives 16 MB Ram which i
gonna buy now !!!! :-((((


>-VGA or multisync monitor runnning at 50-70Hz with horizontal scanning 
>rate of about 31.5Kz.

So does this only support 31.5 KhZ ? Or is it adjustable ?

With only 31.5 Khz you have at 640x480 only 60 Hz and at 720x400 (text
mode) only 70 Hz !
800x600 would only be with about 40 Hz !!! 
But somebody claimed it should work on the Speedstar ?!?
How do you set the horizontal frequency to get it run in 800x600 ?



>- not more than 15M of system RAM. 

>The package comes the following software:
>-Video kit software
>-MMPLAY
>-VBDEMO
>-TEMPRA GIF
>-TEMPRA SHOW
>-MACROMIND ACTION! 

>Hope this infomation can answer some of your questions about vblaster.
>Feel free to post any questions or send me e-mail if you want more information

>/Henry

Best regards Stefan Hartmann.
email to: leo@zelator.in-berlin.de



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*  Stefan Hartmann       This is how to contact me:         *
*  EMAIL: leo@zelator.in-berlin.de                          *
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