Hello Joseph
On 05-Aug-00, you wrote:
> Having been able to buy some more memory recently for my A2000
> (bringing it to 8 MB RAM), i reconfigured my workbench in 16 colors. I
> discovered that this made my connection to my ISP fail. (As i was told
> starting up MiamiInit as a test to identify the origin of my problems)
>
> Miami complains about my foremost screen only. I often use Dopus on an
> other screen in 4 colors.
> I have tried to add an icon tooltype 'PUBSCREEN=DOPUS" and other
> likely names with no succes. - If anybody on this list does know the
> exact name i would be thankfull for the info.
> - Is there a way to find out the names of the screens of programs that
> don't give a clue about them ?
>
> - When i don't use Dopus could i open Miami on its own screen ? How
> should i do that ?
>
> Is the idea valid at all: will i experience communications problems
> when i return to my 16 colors WB, after having started miami on its 4
> colors screen. I don't understand really why Miami has this problem at
> all, since i can browse on an other screen in 16 colors easily.
Without a video card, the more colors you use, the less time the CPU
will have available to handle the serial device.
Direct Memory Access (DMA) is used by both the video and the serial
but the video has priority so the serial suffers and characters get
dropped. The more colors used, the more DMA required by the video.
As it is a builtin hardware shortcoming in all Amigas, the only way
to get fast serial to work with 8+ color screens is to use either
an add-on serial card or to use a video display card such as a CGX
or Picasso. The add-on graphics cards solve the problem by not
using DMA thus allowing the serial device better Bus access. The
add-on serial cards solve the problem by not using DMA and also
having a multi-character buffer (the built-in serial hardware can
only buffer ONE character).
In theory, if the 4-color DOpus screen is the only active screen,
you should not lose serial data but as soon as a 16-color (or part
of) gets displayed, serial data will probably get lost.
The above info may not be 100% accurate in all cases but in general
is pretty close to the way it is.
Gary Gagnon
--
If a turtle doesn't have a shell, is he homeless or naked?
--
To unsubscribe send "unsubscribe miami-talk-ml" to
"[EMAIL PROTECTED]". For help on list commands send "help" to
"[EMAIL PROTECTED]".
