PSO Network Protocol Documentation
by Fuzziqer Software
==================================

PSO sends game data in "commands". Each command has a 4-byte (8-byte on BB) header that tells what type of command it is, and the total size of the command.

--------------
Header formats
--------------

For PSO GameCube and PSO DC, the header is formatted like this:
CC FF SS SS
(C = command number, F = flags, S = size)

For PSO PC, the header is formatted like this:
SS SS CC FF
(C = command number, F = flags, S = size)

For PSO BB, the header (8 bytes rather than 4) is formatted like this:
SS SS CC CC FF FF FF FF
(C = command number, F = flags, S = size)

---------------------
Command documentation
---------------------

00 - invalid command

01 - lobby message box (server->client) (all versions)
DC/GC: 01 00 SS SS 00 00 00 00 00 00 00 00 <message as text>
PC: SS SS 01 00 00 00 00 00 00 00 00 00 <message as Unicode text>
BB: SS SS 01 00 00 00 00 00 00 00 00 00 00 00 00 00 <message as Unicode text>

02 - init encryption (server->client) (DC?, GC)
DC/GC: 02 00 4C 00 44 72 65 61 6D 43 61 73 74 20 4C 6F
62 62 79 20 53 65 72 76 65 72 2E 20 43 6F 70 79
72 69 67 68 74 20 53 45 47 41 20 45 6E 74 65 72
70 72 69 73 65 73 2E 20 31 39 39 39 00 00 00 00
00 00 00 00 SS SS SS SS CC CC CC CC
(C = client key, S = server key)
Note: client will respond with either a 9A, 9D, or 9E command

03 - init encryption and check license (server->client) (BB)
BB: C8 00 03 00 00 00 00 00 50 68 61 6E 74 61 73 79
20 53 74 61 72 20 4F 6E 6C 69 6E 65 20 42 6C 75
65 20 42 75 72 73 74 20 47 61 6D 65 20 53 65 72
76 65 72 2E 20 43 6F 70 79 72 69 67 68 74 20 31
39 39 39 2D 32 30 30 34 20 53 4F 4E 49 43 54 45
41 4D 2E 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 SS SS SS SS SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS
SS SS SS SS SS SS SS SS CC CC CC CC CC CC CC CC
CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC
CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC
CC CC CC CC CC CC CC CC
(C = client key, S = server key)
Note: client will respond with a 93 command

04 - Security data / guild card number (server->client) (DC?, PC, GC)
PC: 2C 00 04 00 00 01 00 00 GG GG GG GG SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS
DC/GC: 04 00 2C 00 00 01 00 00 GG GG GG GG SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS SS
SS SS SS SS SS SS SS SS SS SS SS SS
(G = guild card number, S = security data)
Note: client will respond with a 96 command only for the first 04 it receives

05 - disconnect (client->server) (all versions)
DC/GC: 05 00 04 00
PC: 04 00 05 00
BB: 08 00 05 00 00 00 00 00

06 - chat (bidirectional) (all versions)
DC/GC Client->Server: 06 00 SS SS 00 00 00 00 00 00 00 00 <message>
DC/GC Server->Client: 06 00 SS SS 00 01 00 00 GG GG GG GG <player name> 09 <message>
PC Client->Server: 06 00 SS SS 00 00 00 00 00 00 00 00 <message as Unicode>
PC Server->Client: 06 00 SS SS 00 01 00 00 GG GG GG GG <player name as Unicode> 09 00 <message as Unicode>
BB Client->Server: SS SS 06 00 00 00 00 00 00 00 00 00 00 00 00 00 <message as Unicode>
BB Server->Client: SS SS 06 00 00 00 00 00 00 01 00 00 GG GG GG GG <player name as Unicode> 09 00 <message as Unicode>
(G = Guild Card number of player who sent message)
Note: when a client sends an 06 command, the server broadcasts a chat command to all players in the same game/lobby

07 - Ship Select (server->client) (all versions)
Note: DC format unknown; it's likely to be the same as the GC format
PC: SS SS 07 NN MM MM MM MM XX XX XX XX 04 0F RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
[MM MM MM MM YY YY YY YY 04 0F TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT]
GC: 07 NN SS SS MM MM MM MM XX XX XX XX 04 0F RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
[MM MM MM MM YY YY YY YY 04 0F TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT]
BB: SS SS 07 00 NN 00 00 00 MM MM MM MM XX XX XX XX
04 00 RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR [MM MM MM MM YY YY YY YY 04 00 TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT]
(S = size, N = number of items, M = menu ID, X = title ID (unused), R = menu title, Y = item ID, T = item text)
Note: text in PC and BB (fields R and T) are in Unicode; on GC, they're ANSI
Note: bracketed section repeats (N) times
Note: R field becomes ship name when player joins a lobby
Note: client will respond with either an 09 or 10 command

08 - Team Select (server->client) (all versions)
Note: DC format unknown
PC: SS SS 08 NN MM MM MM MM XX XX XX XX 00 00 RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
[MM MM MM MM YY YY YY YY GG HH TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT II JJ]
GC: 08 NN SS SS MM MM MM MM XX XX XX XX 00 00 RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
[MM MM MM MM YY YY YY YY GG HH TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT KK JJ]
BB: SS SS 08  00 NN 00 00 00 MM MM MM MM XX XX XX XX
00 00 RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR
RR RR RR RR [MM MM MM MM YY YY YY YY GG HH TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT
TT TT TT TT TT TT TT TT TT TT TT TT TT TT II JJ]
(S = size, N = number of teams, M = menu ID, X = title ID (unused), R = menu title (unused), Y = item ID, G = difficulty (Normal: 22, Hard: 23, V Hard: 24, Ultimate: 25, Ep3 game: 0A), H = number of players, I = episode (Ep1: 40, Ep2: 41, Ep4: 43, Ep3: ignored), J = flags (add together; battle: 10, challenge: 20, locked: 02, disabled (BB): 04), K = GC flags (add together; episode 2: 80, episode 1: 40, challenge: 20, battle: 10, locked: 02))
Note: text in PC and BB (fields R and T) are in Unicode; on GC, they're ANSI
Note: bracketed section repeats (N) times
Note: client will respond with either an 09 or 10 command

09 - Menu item info (client->server) (all versions)
DC/GC: 09 00 0C 00 MM MM MM MM II II II II
PC: 0C 00 09 00 MM MM MM MM II II II II
BB: 10 00 09 00 00 00 00 00 MM MM MM MM II II II II
(M = menu ID, I = item ID)
Note: server should respond with an 11 command

0A - invalid command
0B - invalid command
0C - invalid command
0D - invalid command
0E - invalid command
0F - invalid command

10 - Select menu item (client->server) (all versions)
DC/GC: 10 00 0C 00 MM MM MM MM II II II II
PC: 0C 00 10 00 MM MM MM MM II II II II
BB: 10 00 10 00 00 00 00 00 MM MM MM MM II II II II
(M = menu ID, I = item ID)

11 - Ship Info (server->client) (all versions)
DC/GC: 11 7E SS SS 00 F0 FF BF 40 F2 FF BF <message>
PC: SS SS 11 7E 00 F0 FF BF 40 F2 FF BF <message as Unicode>
BB: SS SS 11 00 00 00 00 00 00 00 00 00 00 00 00 00 <message as Unicode>

12 - invalid command

13 - continue sending quest file (bidirectional) (all versions)
13 00 18 04 <0x400 byte buffer> SS SS SS SS
(S = size of data in buffer (Max. 0x400))

14 - invalid command
15 - invalid command
16 - invalid command

17 - init encryption and check license (server->client) (PC, GC)
Note: same format as 02 command
Note: client will respond with a DB command

18 - invalid command

19 - reconnect (server->client) (all versions)
DC/GC: 19 00 0C 00 II II II II PP PP 00 00
PC: 0C 00 19 00 II II II II PP PP 00 00
BB: 10 00 19 00 00 00 00 00 II II II II PP PP 00 00
(I = IP address, P = port)
Note: client will disconnect and reconnect to the given IP/port after this command is sent

1A - large message box (server->client) (all versions)
DC/GC: 1A 00 SS SS <message>
PC: SS SS 1A 00 <message as unicode>
BB: SS SS 1A 00 00 00 00 00 <message as unicode>
Note: sending this command to a BB client may cause that client to disconnect
Note: see D6 command for further information

1B - invalid command
1C - invalid command

1D - ping (bidirectional) (all versions)
DC/GC: 1D 00 04 00
PC: 04 00 1D 00
BB: 08 00 1D 00 00 00 00 00
Note: client will respond with the exact same command

1E - invalid command

1F - Information menu (bidirectional) (DC?, PC, BB)
PC client->server: 04 00 1F 00
Note: same format and usage (server->client) as 07 command

20 - invalid command

21 - GameGuard control (server->client) (BB)
Note: format and usage unknown

22 - GameGuard check (bidirectional) (BB)
BB (old format): 08 00 22 00 VV VV VV VV
BB (new format): 18 00 22 00 00 00 00 00 VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV VV
(V = GameGuard test value)
Note: client will respond with a command in the same format, but with a different value

23 - invalid command
24 - invalid command
25 - invalid command
26 - invalid command
27 - invalid command
28 - invalid command
29 - invalid command
2A - invalid command
2B - invalid command
2C - invalid command
2D - invalid command
2E - invalid command
2F - invalid command
30 - invalid command
31 - invalid command
32 - invalid command
33 - invalid command
34 - invalid command
35 - invalid command
36 - invalid command
37 - invalid command
38 - invalid command
39 - invalid command
3A - invalid command
3B - invalid command
3C - invalid command
3D - invalid command
3E - invalid command
3F - invalid command

40 - guild card search (client->server) (all versions)
DC/GC: 40 00 10 00 00 01 00 00 GG GG GG GG TT TT TT TT
PC: 10 00 40 00 00 01 00 00 GG GG GG GG TT TT TT TT
BB: 14 00 40 00 00 00 00 00 00 01 00 00 GG GG GG GG TT TT TT TT
(G = searcher's guild card number, T = target's guild card number)
Note: if target is found, server should reply with a 41 command
Note: if target is not found, server should not reply

41 - guild card search result (server->client) (all versions)
Note: DC and PC formats are unknown
GC: 41 00 C4 00 00 01 00 00 GG GG GG GG TT TT TT TT
00 00 00 00 II II II II PP PP 00 00 LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
MM MM MM MM YY YY YY YY 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00
BB: 30 01 41 00 00 00 00 00 00 01 00 00 GG GG GG GG
TT TT TT TT 10 00 19 00 00 00 00 00 II II II II
PP PP 00 00 LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL MM MM MM MM
YY YY YY YY 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
(G = searcher's guild card number, T = target's guild card number, I = IP address of server that target is on, P = port number on that server, L = location text ("teamname,blockname,,servername"), M = menu ID of lobby list on remote server, Y = lobby ID that player is in, N = player's name)

42 - invalid command
43 - invalid command

44 - begin sending quest file (bidirectional) (all versions)
DC/GC server->client: 44 02 3C 00 NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF SS SS SS SS
PC server->client: 44 02 3C 00 NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF SS SS SS SS
BB server->client: 58 00 44 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF SS SS SS SS
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00 00 00 00 00 00 00 00
(N = quest name, F = filename (repeated in BB format), S = file size)

45 - invalid command
46 - invalid command
47 - invalid command
48 - invalid command
49 - invalid command
4A - invalid command
4B - invalid command
4C - invalid command
4D - invalid command
4E - invalid command
4F - invalid command
50 - invalid command
51 - invalid command
52 - invalid command
53 - invalid command
54 - invalid command
55 - invalid command
56 - invalid command
57 - invalid command
58 - invalid command
59 - invalid command
5A - invalid command
5B - invalid command
5C - invalid command
5D - invalid command
5E - invalid command
5F - invalid command

60 - broadcast command (bidirectional) (all versions)
DC/GC: 60 00 SS SS <subcommand data>
PC: SS SS 60 00 <subcommand data>
BB: SS SS 60 00 00 00 00 00 <subcommand data>
(S = command size)
Note: when a client sends a 60 command, the server broadcasts the command to all clients in the same lobby/game

61 - player info (client->server) (all versions)
Note: exact structure of player info is too extensive to be included here

62 - target command (bidirectional) (all versions)
DC/GC: 62 PP SS SS <subcommand data>
PC: SS SS 62 PP <subcommand data>
BB: SS SS 62 PP 00 00 00 00 <subcommand data>
(S = command size, P = target slot)
Note: when a client sends a 62 command, the server forwards it to the player in the given slot

63 - invalid command

64 - join game (server->client) (all versions)
Note: DC format unknown
PC: 68 01 64 NN LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ II MM 00 DD BB EE SS CC RR RR RR RR
00 01 00 00
GC: 64 NN 14 01 LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ II MM 01 DD BB EE SS CC RR RR RR RR
TT 01 00 00
BB: A8 01 64 00 NN 00 00 00 LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL LL LL LL LL LL LL LL WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW WW
WW WW WW WW WW WW WW WW WW WW WW WW XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY YY
YY YY YY YY ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ
ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ II MM 01 DD BB 00 SS CC
RR RR RR RR EE 01 00 00
(N = number of players in game, L = map layout, W/X/Y/Z = player lobby data for players 1/2/3/4 respectively, I = client ID of joining player, M = leader ID, D = difficulty, B = battle mode enabled, E = holiday ID, S = section ID of original creator of game, C = challenge mode enabled, R = random number unique to this game, T = episode (0-2))

65 - other player joined game (server->client) (all versions)
Note: same format as 68 command, but used only in games

66 - other player left game (server->client) (all versions)
Note: same format as 69 command, but used only in games

67 - join lobby (server->client) (all versions)
DC/GC: 67 NN SS SS CC LL 01 TT BB BB EE EE 00 00 00 00 <player data sets, 0x43C bytes each>
PC: SS SS 67 NN CC LL 01 TT BB BB EE EE 00 00 00 00 <player data sets, 0x44C bytes each>
BB: SS SS 67 00 NN 00 00 00 CC LL 01 TT BB BB EE EE 00 00 00 00 <player data sets, 0x520 bytes each>
(S = size, N - number of players, C = client's ID, L = leader's ID, T = lobby number, B = block number, E = event)

68 - other player joined lobby (server->client) (all versions)
Note: same format as 67 command, but always only one player

69 - other player left lobby (server->client) (all versions)
DC/GC: 69 LL 08 00 LL NN 00 00
PC: 08 00 69 LL LL NN 00 00
BB: 0C 00 69 00 LL 00 00 00 LL NN 00 00
(L = leaving player ID, N = new lobby/game leader ID)
Note: leaving player ID is repeated for unknown reasons

6A - invalid command
6B - invalid command

6C - broadcast command (bidirectional) (all versions)
Note: same format and usage as 60 command

6D - target command (bidirectional) (all versions)
Note: same format and usage as 62 command

6E - invalid command

6F - set game status (client->server) (all versions)
DC/GC: 6F 00 04 00
PC: 04 00 6F 00
BB: 08 00 6F JJ 00 00 00 00
(J = 0 if game is open, 1 if a quest is in progress and the game should not be joined by anyone else)
Note: this command tells when the client is done loading into a game, so other players may join

70 - invalid command
71 - invalid command
72 - invalid command
73 - invalid command
74 - invalid command
75 - invalid command
76 - invalid command
77 - invalid command
78 - invalid command
79 - invalid command
7A - invalid command
7B - invalid command
7C - invalid command
7D - invalid command
7E - invalid command
7F - invalid command
80 - invalid command

81 - simple mail (bidirectional) (all versions)
Note: format unknown

82 - invalid command

83 - lobby list (server->client) (all versions)
DC/GC: 83 NN SS SS [MM MM MM MM YY YY YY YY 00 00 00 00]
PC: SS SS 83 NN [MM MM MM MM YY YY YY YY 00 00 00 00]
BB: SS SS 83 00 NN 00 00 00 [MM MM MM MM YY YY YY YY 00 00 00 00]
(S = size, N = number of lobbies (should be 15 for every PSO except Ep3, which requires 20), M = menu ID, Y = lobby ID)
Note: repeat bracketed section for each lobby

84 - change lobby (client->server) (all versions)
Note: same format as 10 command

85 - invalid command
86 - invalid command
87 - invalid command

88 - set lobby markers (server->client) (all versions)
DC/GC: 88 NN SS SS [00 01 00 00 GG GG GG GG CC 00 00 00]
PC: SS SS 88 NN [00 01 00 00 GG GG GG GG CC 00 00 00]
BB: SS SS 88 00 NN 00 00 00 [00 01 00 00 GG GG GG GG CC 00 00 00]
(N = number of players, S = size, G = guild card number, C = color)
Note: repeat data in brackets for each player

89 - change lobby marker color (client->server) (all versions)
DC/GC: 89 CC 04 00
PC: 04 00 89 CC
BB: 08 00 89 00 CC 00 00 00
(C = requested marker color)
Note: server should reply with an 88 command

8A - room name (bidirectional) (all versions)
DC/GC client->server: 8A 00 04 00
DC/GC server->client: 8A 00 SS SS <room name>
PC client->server: 04 00 8A 00
PC server->client: SS SS 8A 00 <room name as unicode>
BB client->server: 08 00 8A 00 00 00 00 00
BB server->client: SS SS 8A 00 00 00 00 00 <room name as unicode>
Note: server should respond to 8A with another 8A command

8B - invalid command
8C - invalid command
8D - invalid command
8E - invalid command
8F - invalid command
90 - invalid command
91 - invalid command
92 - invalid command

93 - license check / log in (client->server) (BB)
Note: format not fully known

94 - invalid command
95 - invalid command

96 - client checksum (client->server) (DC?, PC?, GC)
GC: 96 00 0C 00 ?? ?? ?? ?? ?? ?? ?? ??
(? = client checksum)

97 - save player data (server->client) (DC, PC, GC)
DC/GC: 97 01 04 00
PC: 04 00 97 01
Note: client will *probably* respond with a B1 command

98 - leave game (client->server) (all versions)
Note: same format as 61 command
Note: client will automatically send an 84 command to choose a lobby to join after sending this command

99 - time accepted (client->server) (all versions)
DC/GC: 99 00 04 00
PC: 04 00 99 00
BB: 08 00 99 00 00 00 00 00
Note: command might not be used on BB

9A - log in (bidirectional) (DC, PC, GC)
DC/GC client->server: 9A 00 SS SS -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- NN NN NN NN NN NN NN NN 00 00 00 00
00 00 00 00 AA AA AA AA AA AA AA AA AA AA AA AA
00 00 00 00 ....
PC client->server: SS SS 9A 00 -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- NN NN NN NN NN NN NN NN 00 00 00 00
00 00 00 00 AA AA AA AA AA AA AA AA AA AA AA AA
00 00 00 00 ....
DC/GC server->client: 9A XX 04 00
PC server->client: 04 00 9A XX
(S = size, N = serial number as hex string, A = access key, X = reply code (00/02: license ok))
Note: server should respond to a 9A command with its own 9A command
Note: client will respond to a 9A command with either a 9C, 9D or 9E command

9B - invalid command

9C - new user (bidirectional) (DC, PC, GC)
DC/GC client->server: 9C 00 SS SS -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- NN NN NN NN NN NN NN NN 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 AA AA AA AA AA AA AA AA AA AA AA AA
00 00 00 00 ....
PC client->server: SS SS 9C 00 -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- NN NN NN NN NN NN NN NN 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 AA AA AA AA AA AA AA AA AA AA AA AA
00 00 00 00 ....
DC/GC server->client: 9C XX 04 00
PC server->client: 04 00 9C XX
(S = size, N = serial number as hex string, A = access key, X = reply code (00/01/02: license ok))
Note: server should respond to a 9C command with its own 9C command
Note: client will respond to a 9C command with either a 9D or 9E command

9D - log in (client->server) (DC, PC, GC)
Note: same format as 9E command

9E - log in (client->server) (DC, PC, GC)
DC/GC: 9E 00 SS SS -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- VV -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- NN NN NN NN
NN NN NN NN 00 00 00 00 00 00 00 00 AA AA AA AA
AA AA AA AA AA AA AA AA 00 00 00 00 ....
PC: SS SS 9E 00 -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- VV -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- -- -- -- NN NN NN NN
NN NN NN NN 00 00 00 00 00 00 00 00 AA AA AA AA
AA AA AA AA AA AA AA AA 00 00 00 00 ....
(S = size, N = serial number as hex string, A = access key, V = PSO version code)
Note: server should respond to a 9E command with an 04 command

9F - invalid command

A0 - change ship / ship select (bidirectional) (all versions)
DC/GC client->server: A0 00 04 00
PC client->server: 04 00 A0 00
BB client->server: 08 00 A0 00 00 00 00 00
Note: server->client format and usage is the same as the 07 command
Note: when a client sends an A0 command, the server should reply with an A0 or 07 (their functions are the same)

A1 - change block / block select (bidirectional) (all versions)
DC/GC client->server: A1 00 04 00
PC client->server: 04 00 A1 00
BB client->server: 08 00 A1 00 00 00 00 00
Note: server->client format and usage is the same as the 07 command
Note: when a client sends an A0 command, the server should reply with an 07

A2 - quest menu (bidirectional) (all versions)
DC/GC client->server: A2 TT 04 00
PC client->server: 04 00 A2 TT
BB client->server: 08 00 A2 00 TT 00 00 00
DC/GC server->client: A2 NN SS SS [MM MM MM MM YY YY YY YY NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD]
PC server->client: SS SS A2 NN [MM MM MM MM YY YY YY YY NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD]
BB server->client: SS SS A2 00 NN 00 00 00 [MM MM MM MM YY YY YY YY
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD
DD DD DD DD]
(S = size, N = number of quests, M = menu ID, Y = item ID, N = quest name (unicode for PC and BB), D = short quest description (unicode for PC and BB))
Note: repeat bracketed segment for each quest entry
Note: client will respond with either an 09 or 10 command

A3 - quest information (server->client) (all versions)
Note: same format as 1A and D5 commands

A4 - download quest menu (server->client) (DC, PC, GC)
Note: same format and usage as A2 command

A5 - invalid command

A6 - begin sending download quest file / GBA game (bidirectional) (DC, PC, GC)
Note: same format and usage as 44 command

A7 - continue sending download quest file / GBA game (bidirectional) (DC, PC, GC)
note: same format and usage as 13 command

A8 - invalid command

A9 - close quest list (client->server) (all versions)
DC/GC: A9 00 04 00
PC: 04 00 A9 00
BB: 08 00 A9 00 00 00 00 00
Note: some servers use this command to get themselves out of infinite stacking loops; you may be able to simply ignore it depending on how your server is built

AA - invalid command
AB - invalid command

AC - launch quest (bidirectional) (all versions)
DC/GC: AC 00 04 00
PC: 04 00 AC 00
BB: 08 00 AC 00 00 00 00 00
Note: clients in a game send AC commands when they're ready to begin a quest; server sends all clients in the game an AC command when they're all ready, and the quest begins

AD - invalid command
AE - invalid command
AF - invalid command

B0 - text message (server->client) (all versions)
Note: same format as 01 command

B1 - time (bidirectional) (all verions)
DC/GC client->server: B1 00 04 00
PC client->server: 04 00 B1 00
BB client->server: 08 00 B1 00 00 00 00 00
DC/GC server->client: B1 00 SS SS <time as text>
PC server->client: SS SS B1 00 <time as text>
BB server->client: SS SS B1 00 00 00 00 00 <time as text>
Note: server should respond to a client's B1 command with its own B1 command
Note: time is formatted as follows: "year:month:day: hour:minute:second.000"
      example: 2006:12:24: 11:23:27.000

B2 - patch memory (server->client) (DC, PC, GC)
Note: format unknown
Note: command not supported on PSO Plus and PSO Episode III for GameCube

B3 - patch reply / checksum (client->server) (DC, PC, GC)
Note: format unknown
Note: command not supported on PSO Plus and PSO Episode III for GameCube

B4 - invalid command
B5 - invalid command
B6 - invalid command

B7 - rank and meseta (server->client) (GC3)
GC: B7 00 20 00 88 13 00 00 2D 90 72 82 00 00 00 00
00 00 00 00 FF FF FF 00 FF FF FF 00 FF FF FF FF

B8 - card list update (server->client) (GC3)
GC: B8 00 SS SS XX XX XX XX <card list file, PRS compressed>
(S = command size, X = file size)

B9 - invalid command

BA - rank and meseta update (bidirectional) (GC3)
Note: format unknown

BB - invalid command
BC - invalid command
BD - invalid command
BE - invalid command
BF - invalid command

C0 - choice search (bidirectional) (all versions)
Note: format unknown (I never studied Choice Search)

C1 - create game (client->server) (all versions)
DC/GC: C1 00 30 00 00 00 00 00 00 00 00 00 NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN PP PP PP PP
PP PP PP PP PP PP PP PP PP PP PP PP DD BB CC EE
PC: 50 00 C1 00 00 00 00 00 00 00 00 00 NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN PP PP PP PP
PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP
PP PP PP PP PP PP PP PP PP PP PP PP DD BB CC 00
BB: 58 00 C1 00 00 00 00 00 00 00 00 00 00 00 00 00
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP
PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP PP
DD BB CC EE SS 00 00 00
(N = name, P = password, D = difficulty, B = battle mode, C = challenge mode, S = solo mode, E = episode (0 = ep1, 1 = ep2, 2 = ep4))

C2 - invalid command
C3 - invalid command
C4 - invalid command

C5 - challenge rank (server->client) (all versions)
Note: format unknown

C6 - update blocked senders list (client->server) (all versions)
DC/GC: C6 00 7C 00 <0x78 bytes: guild cards of blocked players>
PC: 7C 00 C6 00 <0x78 bytes: guild cards of blocked players>
BB: 80 00 C6 00 00 00 00 00 <0x78 bytes: guild cards of blocked players>

C7 - enable mail auto-reply (client->server) (all versions)
DC/GC: C7 00 SS SS <auto-reply string>
PC: SS SS C7 00 <auto-reply string (unicode)>
BB: SS SS C7 00 00 00 00 00 <auto-reply string (unicode)>
(S = size)

C8 - disable mail auto-reply (client->server) (all versions)
DC/GC: C8 00 00 00
PC: 00 00 C8 00
BB: 00 00 C8 00 00 00 00 00

C9 - broadcast command (bidirectional) (GC3)
Note: same format and handling as 60 command
Note: only broadcast to clients who are using Ep3

CA - server data command (client->server) (GC3)
Note: format unknown

CB - broadcast command (bidirectional) (GC3)
Note: same format and handling as 60 command
Note: only broadcast to clients who are using Ep3

CC - invalid command
CD - invalid command
CE - invalid command
CF - invalid command

D0 - trade command (format unknown)
D1 - trade command (format unknown)
D2 - trade command (format unknown)
D3 - trade command (format unknown)
D4 - trade command (format unknown)

D5 - large message box (server->client) (all versions)
Note: same format and handling as 1A command

D6 - large message box closed (client->server) (GC)
GC: D6 00 04 00
Note: PSO DC and PC will not send this command, so welcome screens before the lobby will only work on GC
Note: PSO Plus and PSO Ep3 will not send this command after the client has joined a lobby

D7 - load GBA game (client->server) (GC)
GC: D7 00 14 00 NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN
(N = filename)
Note: the server should send the requested file using A6 and A7 commands

D8 - info board (bidirectional) (all versions)
Note: exact format unknown

D9 - write info board (client->server) (all versions)
Note: same format as C7 command, but writes to the info board instead

DA - change lobby event (all versions)
DC/GC: DA XX 04 00
PC: 04 00 DA XX
BB: 08 00 DA 00 XX 00 00 00
Note: list of lobby events can be found in the server software's info folder

DB - verify license (DC?, PC?, GC)
DC - menu change (bidirectional) (GC3)
DC - guild card list (bidirectional) (BB)

DD - invalid command

DE - unknown
Note: this command is used by PSOBB, but I haven't been able to figure out what it does

DF - invalid command

E0 - begin loading game / account data (client->server) (BB)

E1 - invalid command

E2 - keyboard / gamepad config (server->client) (BB)
E2 - tournament setup (client->server) (GC3)
E3 - char preview request (client->server) (BB)
E4 - select character / char not present (bidirectional) (BB)
E5 - player preview / create new character (bidirectional) (BB)
E6 - security data / guild card number (server->client) (BB)

E6 - join spectator team (client->server) (GC3)
Note: same format and usage as 08 command

E7 - player data (bidirectional) (BB)
E8 - data exchange (bidirectional) (BB)

E9 - invalid command

EA - clan control (bidirectional) (BB)
Note: this command has many subcommands; their formats are unknown

EB - game parameters (bidirectional) (BB)
EC - leave character select (client->server) (BB)

EC - create Episode III game (client->server) (GC3)
Note: same format and usage as C1 command

ED - modify account data (client->server) (BB)
EE - scrolling message (server->client) (BB)

EF - invalid command
F0 - invalid command
F1 - invalid command
F2 - invalid command
F3 - invalid command
F4 - invalid command
F5 - invalid command
F6 - invalid command
F7 - invalid command
F8 - invalid command
F9 - invalid command
FA - invalid command
FB - invalid command
FC - invalid command
FD - invalid command
FE - invalid command
FF - invalid command