AVR-Chat

So I have this Mega32 running at 4 MHz (yes, 4 MHz, I checked the fuses)

I'm trying to measure two pulse widths, on INT0 and INT1 using T1 with
a divisor of 1.
The pulses have a minimum period of 5uS, nominal period of 14uS, and
max of 23uS.
I can't adjust those values.

I enable INT0 for a rising edge int.
When the int happens, I zero T1, and exit the ISR.
When the int happens again, I read T1 and store it.

Then I disable INT0, enable INT1, and do the same thing for the pulse
on that input.


My problem is that the system seems to be running much slower than I
would expect.
The interrupt latency is measuring out more than 5uS!

I don't have any other ints enabled, other than a very simple T0 ISR
(see previous post)

There's no point where I have ints disabled, at least not in the code
that I wrote.

Do I really have to run the machine faster than this?
I wouldn't expect to have to in Asm..




-- 

"The very powerful and the very stupid have one thing in common. Instead of
altering their views to fit the facts, they alter the facts to fit their
views... which can be very uncomfortable if you happen to be one of the
facts that needs altering." Doctor Who, Face of Evil