[hatari-devel] Videl : Some questions

[Laurent Sallafranque]

Hi,

I've played a little with Videl. I've added a buffer to keep the 
videocounter changes.
Now, I've got nice screen for Pinball Dream and Killing Impact.

But these screens are garbagged by some undesirated pixels from video.c
(I think it detects a low border for example in killing Impact).

My first work should be to integrate VBL, HBL and timerB into videl.c 
and then to add all the videl specific stuff.

But I don't remember some things :

1) Are VBL, HBL and TimerB related to Videl or to the monitor attached 
to the computer ?

if the answear is "to the monitor", does it mean that there are the 
following static tables to implement ?
   TimerB, HBL, VBL cycles for 50 hz , 60 Hz, 70 Hz  on a TV/monitor and 
50 Hz and 100 Hz for VGA monitor ?
   (what about monochrome on a VGA monitor ?)
   How can one select a 100 Hz VGA monotor (is it the monitor that 
drives the VBL or can I parameter it into the Videl ?

2) I don't remember the difference between TimerB and HBL. (I remember I 
used timerB for my rasters). Can somebody explain me this ?

Regards

Laurent