This system module handles the system notifications.

The maximum number of notifications that can be stored/handled is 100, hence the intended range for notificationIDs is 0-99.

News service "news:u"

Command Header	Description
0x000100C8	AddNotification

This service only has one command.

News service "news:s"

Command Header	Description
0x000100C6	AddNotification
0x0002....	Stubbed, only returns 0.
0x0003....	Stubbed, only returns 0.
0x00040000	?
0x00050000	GetTotalNotifications
0x00060042	SetNewsDBHeader
0x00070082	SetNotificationHeader
0x00080082	SetNotificationMessage
0x00090082	SetNotificationImage
0x000A0042	GetNewsDBHeader
0x000B0082	GetNotificationHeader
0x000C0082	GetNotificationMessage
0x000D0082	GetNotificationImage
0x000E0040	SetInfoLEDPattern
0x000F0000	SpotPass notifications related?
0x00100040	(u8 flag) ?
0x00110000	This writes the input u8 to a state field.
0x00120082	GetNotificationHeaderOther
0x00130000	WriteNewsDBSavedata
0x00140000	This writes an unknown u32 value to cmdreply[2].

"news.db": This is the main save-file, the filesize is fixed to 0x2BD0-bytes.
"newsXXX.txt" This is the message data for this notification, where XXX is the decimal notification-index in the below headers-array. The filesize should be <= <size listed here>, since that's the max size read by the notifications applet.
"newsXXX.mpo" This is the MPO data for this notification if any, where XXX is the decimal notification-index in the below headers-array. The filesize should be <= <size listed here>, since that's the max size read by the notifications applet.

Offset	Size	Description
0x0	0x10	Header, see below.
0x10	0x2BC0 (100 * 0x70)	Array of headers for each notification.

Offset	Size	Description
0x0	0x1	Must be 0x1.
0x1	0x1	Flags: bit0 is set by news-module when handling the AddNotification commands.
0x2	0xE	Normally zero?

Error code	Description
0xC8A12805	The notification header data for the specified notificationID is not set(the specified notification doesn't exist).