At 22:26 14/08/01, Si Owen wrote:
You'll certainly see the extra delays when writing to ports 248 and
above, or when the ASIC is drawing the main screen area. I'm confident
that the current SimCoupé is already accurate enough for you to be able
to develop your Mode 4 IM2 routines on it and have
Howard Price wrote:
Thanks for this info. Surprisingly, I'm still using my *real
SAM* to program on right now
My real one is fairly inconvenient to use - I need access to the main
TV, and I have to put it back in it's box so my wife doesn't complain
about it being untidy! :-D
I
Howard Price wrote:
Do you know how many T-states you get a frame, then?
There are always 384 t-states per line for the 312 screen lines = 119808
t-states.
Pref. with memory contention in Mode 4
Just writing a timing program in IM2
Unfortunately it's not that simple to work out! :-/
At 11:59 10/08/01, you wrote:
Real SAM:
MODE 1: ROM=5.986, RAM=4.428
MODE 2: ROM=5.988, RAM=4.883
MODE 3 and 4 (video on): ROM=5.988, RAM=4.883
MODE 3 and 4 (video off): ROM=5.988, RAM=5.561
Si
Do you know how many T-states you get a
