10-13-2009, 07:46 PM
Yes, we can dictate how fast/slow loading is. Works like this:
On the ps2 all data loading is controlled by the IOP. The dvd or hdd will load a chunk of data, and signal back that it's done using an interrupt request.
If the dvd is scratched or the hdd is slow or whatever, this irq will fire a bit later (or in case of a broken dvd never
).
Now, since we emulate all this, we're free to signal this "done" interrupt any time we want.
There are certain boundaries though we need to take care of, else games will break.
This safety margin is what makes loading games from hdd on a real ps2 sometimes faster than doing it on pcsx2.
(The ps2 sometimes has the same problem, remember how some games need certain compatibility switches in hdloader? Same issue
)
On the ps2 all data loading is controlled by the IOP. The dvd or hdd will load a chunk of data, and signal back that it's done using an interrupt request.
If the dvd is scratched or the hdd is slow or whatever, this irq will fire a bit later (or in case of a broken dvd never
).Now, since we emulate all this, we're free to signal this "done" interrupt any time we want.
There are certain boundaries though we need to take care of, else games will break.
This safety margin is what makes loading games from hdd on a real ps2 sometimes faster than doing it on pcsx2.
(The ps2 sometimes has the same problem, remember how some games need certain compatibility switches in hdloader? Same issue
)