PS2bootparam.dat

PS2 boot param file stored in dev_hdd0/tmp/game/ps2bootparam.dat used to pass settings from GameOS to emulator after unloading LV2.

File layout

Name	offset	size	type	notes
rtc_epoch	0x00	0x08	u64	time since epoch in seconds (GMT)
target_id	0x08	0x02	u16	Product_Code
toggle_XO	0x0A	0x01	u8	1 - (X enter and O back), 0 - (O enter and X back)
boot_type	0x0B	0x01	u8	known used value 0x00 (hdd install?) / 0x01 / 0x02 / 0x03 ("2P" classic)
ps2_title_id	0x0C	unk (at least 0x0A)	string	SLES50920
_	0x2C	0x01	u8	_
system_lang	0x2D	0x01	u8	2 digits code from Languages is used (in hex form)
time_zone	0x2E	0x02	u16	sys_time_get_timezone(), offset from GMT in minutes. Used as signed 11 bit value, can be read from ps2 GetOsdConfigParam/SetOsdConfigParam.
summer_time	0x30	0x01	u8	"/setting/dateTime/summerTime", known value 0.
net_device	0x31	0x01	u8	xsettings "/setting/net/device", known value 1 (enabled wifi?)
wlan_ssid	0x32	0x21	string	32 characters + null terminator
_	0x52	0x01	u8	_
net_authProto	0x53	0x01	u8	"/setting/net/authProto", known value 7 (wlan encryption type?)
wlan_pass	0x54	0x40	string	63 + null terminator
_	0x94	0x01	u8	_
_	0x98	0x04	unk	_
_	0x9C	0x01	u8	_
_	0x9E	0x02	u16	_
_	0xA0	0x04	unk	_
_	0xA4	0x01	u8	_
_	0xA6	0x02	u16	_
_	0xA8	0x04	unk	_
_	0xAC	0x01	u8	_
_	0xAE	0x02 (?)	unk	_
color_space	0x118	0x02	u16	/setting/display/colorSpace
video_mode	0x11A	0x02	u16 bitfield	Using CellVideoOutDisplayMode derived from CellVideoOutDeviceInfo (or'ed in loop for all available modes(max32)). CELL_VIDEO_OUT_RESOLUTION_480: 0x0001 = CELL_VIDEO_OUT_ASPECT_4_3 | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x0002 = CELL_VIDEO_OUT_ASPECT_4_3 | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE 0x0004 = CELL_VIDEO_OUT_ASPECT_16_9 | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x0008 = CELL_VIDEO_OUT_ASPECT_16_9 | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE CELL_VIDEO_OUT_RESOLUTION_576: 0x0010 = CELL_VIDEO_OUT_ASPECT_4_3 | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x0020 = CELL_VIDEO_OUT_ASPECT_4_3 | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE 0x0040 = CELL_VIDEO_OUT_ASPECT_16_9 | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x0080 = CELL_VIDEO_OUT_ASPECT_16_9 | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE CELL_VIDEO_OUT_RESOLUTION_720: 0x0200 = CELL_VIDEO_OUT_REFRESH_RATE_59_94HZ 0x1000 = CELL_VIDEO_OUT_REFRESH_RATE_50HZ CELL_VIDEO_OUT_RESOLUTION_1080: 0x0100 = CELL_VIDEO_OUT_REFRESH_RATE_59_94HZ | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x0400 = CELL_VIDEO_OUT_REFRESH_RATE_59_94HZ | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE 0x0800 = CELL_VIDEO_OUT_REFRESH_RATE_50HZ | CELL_VIDEO_OUT_SCAN_MODE_PROGRESSIVE 0x2000 = CELL_VIDEO_OUT_REFRESH_RATE_50HZ | CELL_VIDEO_OUT_SCAN_MODE_INTERLACE
display_type	0x11C	0x01	u8	CellVideoOutPortType 0x00 = CELL_VIDEO_OUT_PORT_NONE 0x01 = CELL_VIDEO_OUT_PORT_HDMI 0x41 = CELL_VIDEO_OUT_PORT_NETWORK 0x81 = CELL_VIDEO_OUT_PORT_COMPOSITE_S 0x82 = CELL_VIDEO_OUT_PORT_D 0x83 = CELL_VIDEO_OUT_PORT_COMPONENT 0x84 = CELL_VIDEO_OUT_PORT_RGB 0x85 = CELL_VIDEO_OUT_PORT_AVMULTI_SCART 0x86 = CELL_VIDEO_OUT_PORT_DSUB
sound_type	0x11D	0x01	u8
_	0x11E	unk	string	_
screen_saver_start_time	0x220	0x04	u32	300/600/1200/1800 depending on /setting/display/screenSaver/startTime
net_enable	0x224	0x01	u8	xregistry "/setting/net/enable"
_	0x225	0x01	u8	xregistry "/setting/net/aoss/aossFlag"
_	0x226	0x188	unk	_
_	0x246	0x1	u8	_
_	0x3AF	0x04	unk	_
_	0x3B3	0x04	unk	_
_	0x3B7	0x01	unk	_
_	0x3BB	0x04	unk	_
_	0x3BC	0x04	unk	_
_	0x3C0	0x04	unk	_
_	0x3CC	0x80	unk	_
_	0x44C	0x80	unk	_
up_convert	0x4CC	0x01	u8	/setting/game/emuUpConvert
smoothing	0x4CD	0x01	u8	/setting/game/emuSmoothing
rgb_output_range	0x4CE	0x01	u8	/setting/display/rgbOutputRange
_	0x4D0	0x08	u64	known value 0x800000001000007
_	0x4D8	0x01	u8	_

Note: This table for now only cover first 0x4F0 of file, next block are controllers settings.
Current layout of this file is very different than the one above.