A82: Re: display port vs. graph_mem


[Prev][Next][Index][Thread]

A82: Re: display port vs. graph_mem





What's the purpose of the delay routine?  Does the display port just need 
some time to function?  I know this is TI's routine:

push    af
inc     hl
dec     hl
pop     af
ret

What's a better one?

Thanks,
Doug


>The only way to access the display is by using the ports to write each of
>the bytes to display, so using the display controller directly should be
>faster. The CR_GRBCopy is very optimized, so to increse speed by writing
>directly to the port you need to use optimized routines too.
>
>The advantage of using CR_GRBCopy is that one can use block copy to output
>the bitmap to the LCD, which combined with writing column by column speeds
>up the process.
>
>If trying to use the display controller directly remember the following:
>- - Do not use the TI delay, it is way to long
>- - Use block copy to write sprites etc
>- - For most sprites write column by column
>

______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com



Follow-Ups: