Protocol:Packet 0x1A

The server sends clients a Packet 0x1A to pop up a large message box on the client's screen (it covers most of the screen). Schtserv uses this packet format to show the welcome message once a client is in the lobby on PSO for Dreamcast.

For PSO v3 and later (GameCube, Xbox, Blue Burst), packet 0xD5 does the same thing as 0x1A. On PSO Episodes 1 & 2 (GC/Xbox), the client will respond with a packet 0xD6 when the user presses A or B to close the message box. "Later" versions of PSO v3 (PSO Plus and Episode 3) will send an 0xD6 only if the player has not yet joined a lobby in the current session. Blue Burst will never send an 0xD6.

Dreamcast Packet Format

Bytes	Meaning
0x00	Packet Type (0x1A or 0xD5)
0x01	Flags (0x00)
0x02-0x03	Packet Size (Variable)
0x04...	Message to show