Re: Serious ST Questions

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2 total messages Started by Franz Lanzinger Mon, 24 Feb 1986 18:37

#35

Author: Franz Lanzinger
Date: Mon, 24 Feb 1986 18:37

12 lines
1102 bytes

Regarding the access to the 520 ST RAM bitmap:

	The 32K bitmap sits on the bus, and can be anywhere in physical
memory, as long as it aligned with a 256 byte boundary.  There are
BIOS (or is that XBIOS) routines to set and get the addresses of both
the physical and the logical screen.  This makes it possible to do
double buffering using their (or your own) graphics routines.  You
could even do this in BASIC using peek and poke, though this approach
is probably not fast enough to bother with.

		Franz Lanzinger (fxl@aids-unix)
		phone: (415) 941-3912

Re: Serious ST Questions

Author: Bill Dippert
Date: Tue, 25 Feb 1986 16:31

23 lines
1670 bytes

In article <8602241936.AA21595@ucbvax.berkeley.edu>, fxl@AIDS-UNIX (Franz Lanzinger) writes:
> Regarding the access to the 520 ST RAM bitmap:
> 
> 	The 32K bitmap sits on the bus, and can be anywhere in physical
> memory, as long as it aligned with a 256 byte boundary.  There are
> BIOS (or is that XBIOS) routines to set and get the addresses of both
> the physical and the logical screen.  This makes it possible to do
> double buffering using their (or your own) graphics routines.  You
> could even do this in BASIC using peek and poke, though this approach
> is probably not fast enough to bother with.
> 
> 		Franz Lanzinger (fxl@aids-unix)
> 		phone: (415) 941-3912
NO!  NO!  NO!   This is net.atari8 for the 800/400/1200XL/800XL/600XL/130XE 
8 bit computer line of Atari.  We do not know or care about the 16 bit line
of computers (520ST, 1045ST, etc.).  Please post ST questions to
net.micro.atari16!!!!!

It took a long time to split the groups, now use them properly!

Grhhhhh!!!!!

--Bill--

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