[A83] Re: lcd mem as ram


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[A83] Re: lcd mem as ram




At 22:56 2002-01-01, you wrote:


> > I don't think that it would be ram in the ld (ram),a sense.  You'd have to
> > build a call that did the OUTing necessary to store to the LCD driver.
>
>Yes i know i read the whole data sheet of the toshiba t6a04 lcd driver. I
>didn't realy mean ram like other ram but the ram in the LCD chip. Indeed,
>the acces of that RAM is not really fast, you have to output the X and the Y
>adress and then do a 'in a,($11)' instruction, you know what i'll make such
>a routine,

This is a known feature of the lcd driver and has been used. I don't know 
about any 83(+) programs released that have used it though, only 
experimental programs. And I heard about some 82 program using it too.
I wonder how usefull it is, since it is both very slow and needs a quite 
large routine (compared to an ordinary ld) to use it, and its only 192 
bytes. If you use only a few bytes, you probably will end up with less free 
ram. :)
But lack of usefullness has never stopped anyone before, go for it, who 
knows, might come in handy some day. :)

///Olle





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