Hello! I was wondering if there was some information on the XMB contained on the PSX DVR, such as how its loaded and its interface with the PS2-side, maybe its just some custom PS2 kernel overall? Thank You
IMO, it's quite a fair bit more complicated than the normal PS2. It has a PS2 side, which everything (XMB and games) runs on. The EE kernel is like the normal CEX kernel, but has functions to support the PSX's features (i.e. 64MB RDRAM). It has a rom0:OSDSYS program too, but is not the same as the normal one. For example, it uses a different IOPRP image (rom0IOPRP) and the modules that it has are different (no X-modules, no FONTM file etc, but has P-modules instead like PCDVDMAN). Unlike the normal OSDSYS program, this one is not a standalone browser, but only initializes the console, displays the "PSX" logo and attempts to locate updates on the memory card, internal flash storage and HDD unit. I believe that the same boot program is stored in the flash storage and the HDD unit's __mbr partition. I don't really know how different things are from this point because I didn't disassemble anything else. The files on the PSX are encrypted as well. But because it is stored on the flash storage, the boot process probably starts in ROM, then the flash, before booting the XMB on the HDD unit. As for the IOP, it has 8MB of EDO RAM. There are various new peripheraps and some things are connected differently. For example, the CD/DVD drive is not quite a normal one, but seems to have an ATAPI device connected as well. At boot, the drive is in "wri" or "rainbow" mode, leaving it unusable for regular PS2 software (because it is controlled differently). There is also the DVRP, which handles the DVR functions (as well as emulating the ATA interface). So I made FMCB set the drive into PS2 mode, set the EE kernel into 32MB mode and disabled the remote control bypass (so that the "QUIT GAME" button is enabled). Here was what I wrote about the PSX, when I got my console in 2013: http://ichiba.geocities.jp/ysai187/PS2/PSX.htm
It definitely runs on the PS2. It's like the PSBBN, but fancier. I don't remember if it is Linux, but it could be.
But yes, there are two optical blocks. As the writer optical block (Sony KWS-200A or Sanyo SF-DB11) is always used by default, a failure of this optical block will render the console unable to read game discs too (because the XMB will not be aware that a game is inserted) - even if the PS2 optical block is working fine.
Can I swap them freely (SF—DB11 and KWS—200A) or there are some mechackon adjustment or DESR software/hardware revision problems? Do have 4x DESRs. I already tried to buy SF—DB11 for 5000 but the seller wanted to trick me, good thing I get my money back. I do know that SONY DRU—800A use tha laser head but it's pretty rare too. What about kws—200a?
Honestly, I have no idea. But there is a pretty good chance that they actually need to be specifically calibrated (because we already have the SF-HD7 as a SANYO OP, which won't work with the SONY OP KHS-400C values). :/
Why are you looking for SF—DB11 for the DESR-5000? In the DESR-5000 is worth a KWS—200A. At the very least in my...
The only DESR drive that I fully disassembled is 5000 and there was SF—DB11. That's why I wanted to buy it. It's good to know that they can replace each other. Have to find it somewhere, don't know if any PC CD drive use it.
How do you know that? What I meant above, was that the PS2 could either come with the KHS-400C or the SF-HD7, starting from the F-chassis... but only if configured to. The hardware was exactly the same, but the values within the EEPROM differed.
Sorry for posting crap, opened it up again (last time I opened it 3 years ago). It has KWS-200A. I'll try my best to clean it up. Sorry for confusing all of your.
