Open PS2 Loader Speed

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05-23-2011, 05:22 AM
foxsevent

Open PS2 Loader Speed

I was wondering what kind of speed do we get mainly i mean on SMB since HDD has a lot faster transfer but since i have a Slim 7704 i can't hook up one, the best i could get was around 1MB/s i guess this is due to fact that PS2 has a 10MB network adapter (not sure).

So my question is can this be improved cause that's about half speed of what the DVD drive in PS2 can do i think PS2 uses 2x speed that's around 2,4MB/s.

Now this ain't so bad most game i checked load about the same only 3 games have longer loading times and 1 of em has stuttering FMV, but a big plus to OPL is that has a lot faster access time which in games like "Tales of Abyss" doesn't lag when encountering battle.

THX i CYA

BTW what's the max speed for Ethernet cable's i'm thinking of buying 1GB ethernet adapter for PC but don't know if it's worth it, i have a router so that maybe be a problem.
05-23-2011, 05:42 AM
SP193

Quote:

Originally Posted by foxsevent

I was wondering what kind of speed do we get mainly i mean on SMB since HDD has a lot faster transfer but since i have a Slim 7704 i can't hook up one, the best i could get was around 1MB/s i guess this is due to fact that PS2 has a 10MB network adapter (not sure).

The PS2 has a network adaptor that can operate in both 10Mbit/s and 100Mbit/s modes.

Unfortunately, all data requests will have to go through an extremely slow 36MHz I/O Processor.
That is the bottleneck of the PS2 Ethernet adaptor's performance here.

Quote:

Originally Posted by foxsevent

So my question is can this be improved cause that's about half speed of what the DVD drive in PS2 can do i think PS2 uses 2x speed that's around 2,4MB/s.

The PS2's DVD drive can operate at:

4x DVD - ~5540KB/s
24x CD - ~3600KB/s

Of course, those are the theoretical maximum speeds. The actual maximum speed might be lower or higher (unlikely) than those rates.

Quote:

Originally Posted by foxsevent

Now this ain't so bad most game i checked load about the same only 3 games have longer loading times and 1 of em has stuttering FMV, but a big plus to OPL is that has a lot faster access time which in games like "Tales of Abyss" doesn't lag when encountering battle.

Unfortunately, there is nothing that can be done, except for making the SMAP drivers more efficient.

The SMAP is the PS2's Ethernet/network adaptor.

I have managed to get the Direct Memory Access Controller (DMAC) to transfer data to the SMAP, but not read data from the SMAP.
Maybe that will help, but by not much. :(

With the DMAC to copy data to and from the SMAP, there won't be the slow IOP as a performance bottleneck.

If I do manage to get it to work both ways, I'll commit it to OPL's repository as soon as possible.

Quote:

Originally Posted by foxsevent

BTW what's the max speed for Ethernet cable's i'm thinking of buying 1GB ethernet adapter for PC but don't know if it's worth it, i have a router so that maybe be a problem.

It depends on the interfaces that the cable is connected to (Other than the cable itself).
The connection will operate at the maximum rate of the slower device.

For example, my PS2 was once connected to my DLink DIR-655 router that can operate at 1000Mbit/s maximum per port.
But since the PS2 could only transfer data at 100Mbit/s maximum, the connection to the router from the PS2 was limited to 100Mbit/s.

With a Cat5e cable, the maximum supported speed is 100Mbit.
With a Cat6 cable, the limit is 1000Mbit/s.
05-23-2011, 06:23 AM
foxsevent

Ok thx for the info last question just how much faster is the transfer on HDD i'm guessing it's max speed of the old IDE HDD but id like to know the number's, cause i'm thinking of buying a cheap PS2 fat even if it had broken DVD drive, any models that i should watch out for ??.
05-23-2011, 09:03 AM
SP193

Quote:

Originally Posted by foxsevent

Ok thx for the info last question just how much faster is the transfer on HDD i'm guessing it's max speed of the old IDE HDD but id like to know the number's, cause i'm thinking of buying a cheap PS2 fat even if it had broken DVD drive, any models that i should watch out for ??.

If you don't mind the DVD drive's condition, any PS2 model from between the SCPH-30000 and SCPH-55000 series will probably do.

However, you might want to avoid the SCPH-10000, SCPH-15000 and SCPH-18000 consoles, as those consoles use a PCMCIA network adaptor that will probably be very difficult for you to buy if you live outside of Japan.

The transfer rates of the internal HDD should be around 66MB/s.
05-25-2011, 01:22 AM
Bat Rastard

That brings me to a question: I've been seeing some SATA PS2 Network Adapters online. How's the stability with them over the oldschool IDE adapter, and does it eliminate the "Western Digital" problem? I was thinking of snagging one because I'm extremely limited with a 250GB Seagate Barracuda IDE drive now that SATA is the defacto standard.
05-25-2011, 04:33 AM
SP193

Quote:

Originally Posted by Bat Rastard

That brings me to a question: I've been seeing some SATA PS2 Network Adapters online. How's the stability with them over the oldschool IDE adapter, and does it eliminate the "Western Digital" problem? I was thinking of snagging one because I'm extremely limited with a 250GB Seagate Barracuda IDE drive now that SATA is the defacto standard.

This has been discussed several times here, and these were the conclusions drawn:

1. They were all not manufactured by Sony, since the only official NA designs included an IDE port.
2. Some of them lack a Ethernet port, so they should really be not classified as a network adaptor. :lol:
3. Some of them have compatibility issues (Either with the hardware or software of the PS2).
4. As they were not manufactured by Sony, the quality of some of them are questionable. :lol:

EDIT: There were no reports of those SATA NAs having physical incompatibilities with any HDD model yet.

But, there were few reports from users who have owned and used such adaptors, so you might have to try using one for yourself.
05-26-2011, 04:57 AM
Bat Rastard

I think I'll pass on that -- if I come across a bigger IDE HDD other than Seagate or Maxtor, I'll just have to break down and modify my existing NA to make it fit! :D
08-08-2012, 07:09 AM
zerowalker

Hi i am wondering about the speed aswell.

How Fast will the Network go with that slow I/O Proccessor?
Is there a way to overclock it a bit?

And is the HDD really 60megabyte per sec, doesn´t it have to go through a I/O Proccessor?

Thanks:)
08-13-2012, 09:15 PM
SP193

Quote:

Originally Posted by zerowalker

Hi i am wondering about the speed aswell.

How Fast will the Network go with that slow I/O Proccessor?
Is there a way to overclock it a bit?

And is the HDD really 60megabyte per sec, doesn´t it have to go through a I/O Proccessor?

Thanks:)

These questions were answered before, and please start your own thread instead of bumping a 1.5 year old thread.

It depends on the SMAP driver, protocol and the network protocol stack used. If DMA support is present in the network driver, and the network driver and the network protocol stack are rigged to "steal" the IOP by transferring data via DMA within the interrupts, one could get about 4MB/s.

Outside of the interrupt and with competition from other threads, only about 0.60MB/s was attainable in my tests.

If one was to move the network stack off the IOP and onto the EE like Sony has always been doing, one should be able to attain full speed with it (Maybe 10MB/s, like I have been getting with my LAN here).

The HDD operates over the ATA-4 bus that the PS2 has, so it can theoretically attain 66MB/s. So far, it seems like it can manage about 10MB/s.
It does go through the IOP, but has DMA support and doesn't involve as many layers of protocols like TCP/IP, IP and Ethernet.

The firewire/i.Link port is 400Mbit, but can only give about 7MB/s because it requires the IOP to re-byte-swap the data. I don't know why it doesn't have an option to disable byte-swapping, but it's probably why Sony didn't include DMA support for the i.Link port in their drivers.