not too technical when it comes to #s so i am posting a syscheck from my system.hope the info u want is here.

sysCheck v1.6.1 by Erik Spyder

Region: NTSC-U
The system menu v481 is running under IOS61 (rev 5405)
Hollywood v0x21
Console ID: 92623526
Boot2 v4
Found 104 titles
Found 29 IOS on this console
Found 10 IOS Stubs on this console

IOS (revision) IOS Stub Trucha Bug ES Identify Flash Access NAND Access Boot2 Access USB 2.0
IOS3 (rev 65280) Yes ? ? ? ? ? ?
IOS4 (rev 65280) Yes ? ? ? ? ? ?
IOS9 (rev 778) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS10 (rev 768) Yes ? ? ? ? ? ?
IOS11 (rev 256) Yes ? ? ? ? ? ?
IOS12 (rev 269) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS13 (rev 273) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS14 (rev 520) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS15 (rev 523) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS16 (rev 512) Yes ? ? ? ? ? ?
IOS17 (rev 775) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS20 (rev 256) Yes ? ? ? ? ? ?
IOS21 (rev 782) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS22 (rev 1037) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS28 (rev 1550) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS30 (rev 2816) Yes ? ? ? ? ? ?
IOS31 (rev 3349) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS33 (rev 3091) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS34 (rev 3348) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS35 (rev 3349) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS36 (rev 3351) No Enabled Enabled Disabled Enabled Disabled Disabled
IOS37 (rev 3869) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS38 (rev 3867) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS50 (rev 5120) Yes ? ? ? ? ? ?
IOS51 (rev 4864) Yes ? ? ? ? ? ?
IOS53 (rev 5406) No Enabled Disabled Disabled Disabled Disabled Disabled
IOS55 (rev 5406) No Enabled Disabled Disabled Disabled Disabled Disabled
IOS56 (rev 5405) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS57 (rev 5661) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS60 (rev 6174) No Enabled Disabled Disabled Disabled Disabled Disabled
IOS61 (rev 5405) No Disabled Disabled Disabled Disabled Disabled Disabled
IOS70 (rev 6687) No Enabled Disabled Disabled Enabled Disabled Disabled
IOS202 (rev 65535) No Enabled Enabled Disabled Enabled Disabled Enabled
IOS222 (rev 4) No Enabled Enabled Disabled Disabled Disabled Enabled
IOS223 (rev 4) No Enabled Enabled Disabled Disabled Disabled Enabled
IOS224 (rev 65535) No Enabled Disabled Disabled Enabled Disabled Enabled
IOS249 (rev 17) No Enabled Enabled Disabled Enabled Disabled Enabled
IOS250 (rev 65535) No Enabled Enabled Disabled Enabled Disabled Enabled
IOS254 (rev 65281) Yes ? ? ? ? ? ?