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Subject: RE: Upside down
From: TP Diffenbach (rockbox_at_diffenbach.org)
Date: 2003-12-11


It does, but it's one bit at a time, so we would need 8 or 16 of them.
whether or not that might be faster than table lookup is unknown.

-----Original Message-----

Does the SH1 instruction set include a rotate carry left instruction?

-----Original Message-----
From: owner-rockbox_at_cool.haxx.se [mailto:owner-rockbox_at_cool.haxx.se]On
Behalf Of Daniel Stenberg
Sent: Thursday, December 11, 2003 8:47 AM
To: rockbox_at_cool.haxx.se
Subject: Re: Upside down

On Thu, 11 Dec 2003, Johan Vromans wrote:

> So instead of buying a extension cord, would it be easy and
straightforward
> to change the display to show its contents 180 degrees rotated?

It would only be a matter of changing
firmware/drivers/lcd-recorder.c:lcd_update() to draw the screen up-side-down
instead. Every byte of the frame buffer would need to be bitswapped, but...

--
 Daniel Stenberg -- http://rockbox.haxx.se/ -- http://daniel.haxx.se/



Page was last modified "Jan 10 2012" The Rockbox Crew
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