Date   : Mon, 01 Aug 1994 11:16:23 EST
From   : Stephen Quan <quan@...>
Subject: Re: Video display.

I wrote :

>    * rule of thumb is 1 scan line per 128 cycles.
>        (or 1 scan line per 64 NOP instructions)

James B writes :

> You may wish to emulate at a different level - emulating the 6845 chip.
> The registers for this chip (see the new advanced user guide) control much of
> the above, so the default modes alone aren't emulation enough (sorry for the
> bad English there).

This make sense.  :-)

I was wondering if 128 cycles/scanline is still true for non-standard
graphics modes, such as the 256-byte per scanline one.  I have a feeling
it might be, but I am not 100% sure.  The MODE 8 from the AUG seems to
check out, not surprised by that result as it is so close to MODE 5.
-- 
Stephen Quan (quan@...                 ), SysAdmin, Analyst/Programmer.
Centre for Spatial Information Studies, University of Tasmania, Hobart.
GPO BOX 252C, Australia, 7001.  Local Tel: (002) 202898 Fax: (002) 240282
International Callers use +6102 instead of (002).