[PS2] Launching ELF files from mc0 question

[Harry62]

Is it possible to launch ELF files from a regular Sony 8MB memory card without any prior modifications other than code in game? I'm using what appears to be LoadPS2Exec() in SOCOM 2 to launch the file but I freeze every time. I confirmed this function launches ELF files by launching a network ELF from the disc without issue. I tried doing this on a PS2. Then I tried launching an ELF from the memory card via uLaunchELF in PCSX2 v1.2.1 and regular PS2 and it freezes as well. I can launch ELFs on both PS2 and PCSX2 from cdrom0: without any issue and from mass0: on PS2 without issue.

On PS2, with the memory card in slot 1, I used this path: "mc0:/BOOT.ELF". I also tried putting the ELF in different folders and renamed the ELF several times. It still froze on PS2 and PCSX2 on all attempts.

I'm not doing anything special to put the BOOT.ELF on the memory card, just FTPing it over from PC. I think that may be the issue but I was under the impression the memory card was just another storage device.

Sorry if this is common information but I could not find anything on this via google.

[lee4]

you need uLE v4.40h (for PCSX2 tests).zip

PCSX2 doesnt support EE timing at all

[Harry62]

you need uLE v4.40h (for PCSX2 tests).zip

PCSX2 doesnt support EE timing at all

What about PS2 though? It also freezes with uLE or in game(SOCOM II NTSC) when launching from mc0. I tried the supplied link and get the same errors in pcsx2v1.2.1:

(EE pc:00000004) TLB Miss, addr=0x70025f8b [store]
(EE pc:800002BC) TLB Miss, addr=0x7ff34e40 [load]
(EE pc:800002BC) TLB Miss, addr=0x60114f40 [load]
(EE pc:8000032C) TLB Miss, addr=0x7fc14f40 [load]
(EE pc:800002BC) TLB Miss, addr=0x7f014f40 [load]
(EE pc:800002BC) TLB Miss, addr=0x40014f40 [load]

My main concern is PS2 though. Is mc0/1 protected in some way the cdrom0 isn't?

edit: To better explain:

SOCOM II[SCUS_972.75]

LoadPS2Exec: 001ACE88
Args:
a0 = file path

Setting the file path to any ELF on cdrom0 works. Setting it to any ELF on mc0 fails.

[lee4]

some game tries open mc port
because you use mc to boot elf
game probably cant initializes mc
because mc already in use

TLB Miss = cant read or write data

[Harry62]

some game tries open mc port
because you use mc to boot elf
game probably cant initializes mc
because mc already in use

TLB Miss = cant read or write data

Thanks, that explains a lot. I'll try it on a different memory card in mc1.