| asp.attn_code | Attn code | Unsigned 16-bit integer | asp attention code |
| asp.error | asp error | Signed 32-bit integer | return error code |
| asp.function | asp function | Unsigned 8-bit integer | asp function |
| asp.init_error | Error | Unsigned 16-bit integer | asp init error |
| asp.seq | Sequence | Unsigned 16-bit integer | asp sequence number |
| asp.server_addr.len | Length | Unsigned 8-bit integer | Address length. |
| asp.server_addr.type | Type | Unsigned 8-bit integer | Address type. |
| asp.server_addr.value | Value | Byte array | Address value |
| asp.server_directory | Directory service | String | Server directory service |
| asp.server_flag | Flag | Unsigned 16-bit integer | Server capabilities flag |
| asp.server_flag.copyfile | Support copyfile | Boolean | Server support copyfile |
| asp.server_flag.directory | Support directory services | Boolean | Server support directory services |
| asp.server_flag.fast_copy | Support fast copy | Boolean | Server support fast copy |
| asp.server_flag.no_save_passwd | Don't allow save password | Boolean | Don't allow save password |
| asp.server_flag.notify | Support server notifications | Boolean | Server support notifications |
| asp.server_flag.passwd | Support change password | Boolean | Server support change password |
| asp.server_flag.reconnect | Support server reconnect | Boolean | Server support reconnect |
| asp.server_flag.srv_msg | Support server message | Boolean | Support server message |
| asp.server_flag.srv_sig | Support server signature | Boolean | Support server signature |
| asp.server_flag.tcpip | Support TCP/IP | Boolean | Server support TCP/IP |
| asp.server_icon | Icon bitmap | Byte array | Server icon bitmap |
| asp.server_name | Server name | String | Server name |
| asp.server_signature | Server signature | Byte array | Server signature |
| asp.server_type | Server type | String | Server type |
| asp.server_uams | UAM | String | UAM |
| asp.server_vers | AFP version | String | AFP version |
| asp.session_id | Session ID | Unsigned 8-bit integer | asp session id |
| asp.size | size | Unsigned 16-bit integer | asp available size for reply |
| asp.socket | Socket | Unsigned 8-bit integer | asp socket |
| asp.version | Version | Unsigned 16-bit integer | asp version |
| asp.zero_value | Pad (0) | Byte array | Pad |