For the folks with DESR(PSX) units at their homes...

At the XMB:


Launching it:


Open PS2 Loader splash screen:


Game list:


In the game:



A few limitations apply:

Currently the space for PS2 software on all DESR units caps at 40GB but SP193 believes it can be resized to a maximum of 120GB.
Boot HD Loader partitions from partition information region (PATINFO) cannot be used because the cross media bar software requires that a partition has a valid PSF filesystem in it for it's resource files display. PSBBN does not require that and will show generic icons instead if it cannot read the PSF filesystem within a partition.

The PSX cannot use ATAD with 48bit support while running PS2 software so a limit of 120GB is imposed.

Also, regular homebrew using 48 bit ATAD drivers will not work properly with it's harddrive due to how the DVRP interface handles HDD access.

Even with these problems, this is a win ! :very_drunk:

So, anyone regret selling their DESR unit now ? :biggrin-new:

 

Congratulations on this achievement!

I said that I believed that the minimum is 2GB. I don't even know how high the maximum is, since the code was reverse-engineered.

A few sizes in 512-byte sectors were observed, depending on the function used to send command 0x683A (SetMaxLba28) to dvr_hdd0:
1. 0x00400000 (2.0GB)
2. 0x004017C8 (~2GB)
2. 0x04A817C8 (40.0GB)
3. Checks a variable in the input structure, and uses the content of another variable. Probably a custom size?

To be precise, it's because of a problem with the emulated PS2 ATA interface: It indicates that the attached disk supports 48-bit LBA, and shows the full capacity of the disk via the new 48-bit LBA capacity registers... but accesses to anything above the indicated 28-bit LBA capacity results in errors.

 

Yesterday I got this out of my DESR harddrive:

It clearly implies a maximum size of 120 GB. (last stuff on the model string is the HDD size)

Since
4A817C8x200=9502F9000 (40000000000)
How about trying:
DF84758x200=1BF08EB000 (120000000000)
?

 

Then it's your observation, not mine (I only observed the allowable "PS2 HDD" capacities, from the code within the PSX update disc installer). Not to mention that you're looking at the report made by the HDD unit, and not how high the DVRP would allow.

But now to think about it, it'll surely be at 137GB at most because it's a requirement anyway (HDDs larger than 137GB are to report themselves as having a 28-bit LBA capacity of 137GB). Of course, this is assuming that the DVRP would allow a setting of 137GB to be set, to begin with. If it only accepted the 40.0GB setting as the largest setting, then that'll be the highest one can set it to.

If you can dig out more about how this thing can be operated, that'll be great. Especially if there's a way to modify and update the DVRP's firmware. The functions I have provided within the xlibhdd.c file, which comes with the PSXHDDTest project, can be used as a starting point.

EDIT:

Sorry, but my time for doing this is basically up, so my priorities are shifting. I wanna do the stuff that I didn't do, before I can't do anything at all.

You can try this on your own. The code I'm referring to is in xlibhdd.c. I recorded whatever I found out in those files (xlibhdd.c and xlibhdd.h), so whatever I didn't write in there isn't known.

 

Good job!
I am definitely gonna try this after I'll fix laser assembly (bought KWS-220A, looks like it's very similar to KWS-200A, same pins count, maybe I'll fit it somehow)

 

Congratulations - a very nice piece of work. Based on this, how similar is the execution environment between the PSX and the PS2?

 

All the best to you with getting that done!

It's supposed to be 100% compatible, in order for PlayStation 2 games to run on it. However, compatibility with homebrew applications may be a little worse, since some stuff within the boot ROM of retails (e.g. rom0:FONTM) that Sony obviously didn't intend anyone from the outside to use, are missing. It depends on what the homebrew software uses. The IOP modules used by homebrew software in general are all present, from what I remember.

However, the PSX hardware is a little more powerful than the retail PlayStation 2. It has 64MB of EE RAM and 7MB of IOP RAM.

The EE kernel of the PSX has got additional syscalls implemented as well, and it seems like some of the (unused?) syscalls were removed.

 

I think it's 8MB of IOP RAM like a TOOL (4x OKI EDO RAM chips of the same kind the TOOL has on it's board)...

 

Another discovery...

Apparently if you catapult launching a PS2 bootable game from the HDD the unit enters in a "special PS2 mode" which COMPLETELY DISABLES AND BYPASSES the DVR laser. :stupid:

So, with a faulty DVDR optical pickup which cannot read DVD discs at all I am installing FFXI on it right now:


Now, ain't that exciting ?

 

Hi!

How cool is that?
:congratulatory:

Nice to see you don't have wasted time.
Keep on rocking!


Rgds.

 

Great job, would it be possible if you create a tutorial on how to get it done l_oliveira ?

 

very nice.
now i want a psx again- any chance you can slap together (or farm out to an enterprising individual) a nice monochrome icon to match the existing xmb icons? I'd make one up if there were samples of some of the other icons i could work with...

 

Owning a PSX just got batter then before! Mmm.. I'm sure you can also get a PSone/POPS game working the same way you got OPL on it, love to play BB3 on my PSX, XD

 

you never cease to amaze me

now i wish i'd have bought that DESR when i had the chance -_-

 

Watch the prices go way up now.

This is too cool. Looks like I'm gonna keep my unit and hold off on saving for a PS4 for now.


here's a silly question, but can we get the more slightly more powerful hardware working for us in terms of screen resolution and overall game quality? Or is it just not a significant enough bump to do so?

 

Unfortunately, we don't know yet whether it has more VRAM to allow that (There isn't a known way to determine the amount of available VRAM).

Since it does have more EE RAM, you can do more stuff with it like buffering more data. You'll be able to store more high-quality textures without streaming the data from the IOP (Probably would have helped games like the Champions of Norrath to reduce lag, if the retail had that amount of memory that was usable).

But no, the graphical performance won't increase much unless it does have more VRAM than a retail has.

But either way, please take note that even though the PSX has more RAM than a retail PlayStation 2 has, no game will ever take advantage of it because they were built to assume that the console has only 32MB of EE RAM, 2MB of IOP RAM and 4MB of VRAM.

 

wow, nice job.

 

I would love to try this on my 5500, is it booting off an MC or HDD?

 

At least in theory this can speed up ps2linux. does anybody tried it (or BBNAV) on DVR?

 

Great job, I'm proud of you guys!!!