Re: Second Sight Question

[The Wizard of Oz <wizard@emeraldcity.gov>]

On Sun, 30 Jan 2005 09:16:38 -0800, aiiadict wrote:

> http://www.zipworld.com.au/~kashum/a2lib/
> 
> 
> there are libraries for Merlin for the Second
> Sight card on this page.
> 
> This is the author of Marinetti, Richard B's
> page.
> 
> 
> 
> Rich

	Just downloaded it. Thanks.

				Later
				Mike



> The Wizard of Oz wrote:
>> On Tue, 11 Jan 2005 18:09:10 +0000, Michael J. Mahon wrote:
>>
>> > Bryan Parkoff asked:
>> >
>> >>    Low Res, High Res, Double High Res use main bank and aux bank
> and Super
>> >>Res uses $E0 bank and $E1 bank.  My question is which memory
> location Second
>> >>Sight's modes such as 640x400x256, 1024x768x256, and beyond are
> stored.
>> >>Someone told me that all pixel information are stored in Second
> Sight card's
>> >>RAM, but they do not store in the motherboard's RAM.
>> >>    If pixel information is stored in Second Sight card's RAM, how
> can 65816
>> >>instructions access by modifying pixel data in the memory location
> that they
>> >>should be in motherboard's RAM.  Is there a special softswitch to
> transfer
>> >>pixel data from motherboard's RAM to Second Sight card's RAM?
>> >>    I am not sure if the information is wrong.  Please let me know
> when you
>> >>find the information where pixel information is stored.  Thanks...
>> >
>> > The Second Sight card has a processor on board that eavesdrops
>> > graphics updates to Apple graphics pages and "translates" them
>> > into "equivalent" updates in its own memory, which is the video
>> > RAM on the Second Sight card.
>> >
>> > This is much more like the video card model of the PC.
>> >
>> > Of course, it would also be possible to provide modes on the
>> > card in which the Apple processor could indirectly access the
>> > video RAM on the card, but those modes would, of course, not
>> > be compatible with Apple II graphics.
>> >
>> > -michael
>> >
>> > New Applesoft BASIC interface for NadaNet networking!
>> > Home page:  http://members.aol.com/MJMahon/
>>
>> 	Odd thought... Does anybody have a routine which would allow a
> programmer
>> like myself to send a pixel of a given colour to the card? Likewise
> would
>> someone have a routine to set up some predefined graphics modes? All
> I've
>> seen are some neat demos and specs but no actual code samples.
>> 
>> 				Later
>> 				Mike