From: fachat (afachat_at_gmx.de)
Date: 2005-11-24 01:15:17
On Mon, Nov 28, 2005 at 11:05:07AM +0100, MagerValp wrote:
> Yep. Apparently making a simple latch uses fewer transistors than a
> read/write register. It's a PITA, but not uncommon - e.g. the SID also
> has write only registers.
Even the 6545/6845 has this problem, which was actually a PITA for
early Linux video drivers IIRC that had to cope with these chips,
but could not read the chip state to restore it e.g. after console
switch.
Andre
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