Int 5C  - Atalk.sys - Appletalk Interface                                  [N]

   DX:BX -> control block (see below)

Return: none

Notes: this driver can use any interrupt from 5Ch to 70h
   the signature 'AppleTalk' appears 16 bytes prior to the interrupt
     handler; this serves as the installation check
Index: installation check;ATALK.SYS|installation check;AppleTalk interface

Values for command code:
 01h   "AT_INIT"       initialize the driver
 02h   "AT_KILL"
 03h   "AT_GETNETINFO" get current network info incl init status
 04h   "AT_GETCLOCKTICKS"
 05h   "AT_STARTTIMER"
 06h   "AT_RESETTIMER"
 07h   "AT_CANCELTIMER"
 10h   "LAP_INSTALL"
 11h   "LAP_REMOVE"
 12h   "LAP_WRITE"
 13h   "LAP_READ"
 14h   "LAP_CANCEL"
 20h   "DDP_OPENSOCKET"
 21h   "DDP_CLOSESOCKET"
 22h   "DDP_WRITE"
 23h   "DDP_READ"
 24h   "DDP_CANCEL"
 30h   "NBP_REGISTER"
 31h   "NBP_REMOVE"
 32h   "NBP_LOOKUP"
 33h   "NBP_CONFIRM"
 34h   "NBP_CANCEL"
 35h   "ZIP_GETZONELIST"
 36h   "ZIP_GETMYZONE"
 37h   "ZIP_TAKEDOWN"
 38h   "ZIP_BRINGUP"
 40h   "ATP_OPENSOCKET"
 41h   "ATP_CLOSESOCKET"
 42h   "ATP_SENDREQUEST"
 43h   "ATP_GETREQUEST"
 44h   "ATP_SENDRESPONSE"
 45h   "ATP_ADDRESPONSE"
 46h   "ATP_CANCELTRANS"
 47h   "ATP_CANCELRESPONSE"
 48h   "ATP_CANCELREQUEST"
 50h   "ASP_GETPARMS"
 51h   "ASP_CLOSESESSION"
 52h   "ASP_CANCEL"
 53h   "ASP_INIT"
 54h   "ASP_KILL"
 55h   "ASP_GETSESSION"
 56h   "ASP_GETREQUEST"
 57h   "ASP_CMDREPLY"
 58h   "ASP_WRTCONTINUE"
 59h   "ASP_WRTREPLY"
 5Ah   "ASP_CLOSEREPLY"
 5Bh   "ASP_NEWSTATUS"
 5Ch   "ASP_ATTENTION"
 5Dh   "ASP_GETSTATUS"
 5Eh   "ASP_OPENSESSION"
 5Fh   "ASP_COMMAND"
 60h   "ASP_WRITE"
 61h   "ASP_GETATTENTION"
 70h   "PAP_OPEN"
 71h   "PAP_CLOSE"
 72h   "PAP_READ"
 73h   "PAP_WRITE"
 74h   "PAP_STATUS"
 75h   "PAP_REGNAME"
 76h   "PAP_REMNAME"
 77h   "PAP_INIT"
 78h   "PAP_NEWSTATUS"
 79h   "PAP_GETNEXTJOB"
 7Ah   "PAP_KILL"
 7Bh   "PAP_CANCEL"

Format of AppleTalk control block:
Offset Size    Description
 00h   WORD    command code (see above)
       OR with the following flags
       8000h start command then return
       4000h wait for interrupt service to complete
 02h   WORD    returned status
       0000h success (already initialized if func 01h)
 04h   DWORD   pointer to completion function
 08h   WORD    network number
 0Ah   BYTE    node ID
---if general func (01h,03h), control block continues:
 0Bh   BYTE    "inf_abridge"
 0Ch   WORD    "inf_config"
 0Eh   DWORD   pointer to buffer
 12h   WORD    buffer size
---if DDP function (20h-24h), control block continues:
 0Bh   BYTE    "ddp_addr_socket"
 0Ch   BYTE    "ddp_socket"
 0Dh   BYTE    "ddp_type"
 0Eh   DWORD   pointer to buffer
 12h   WORD    buffer size
 14h   BYTE    "ddp_chksum"
---if Name Binding Protocol (30h-34h), control block continues:
 0Bh   BYTE    "nbp_addr_socket"
 0Ch   WORD    "nbp_toget"
 0Eh   DWORD   pointer to buffer
 12h   WORD    buffer size
 14h   BYTE    "nbp_interval"
 15h   BYTE    "nbp_retry"
 16h   DWORD   "nbp_entptr"
---if AppleTalk Transaction Protocol (42h), control block continues:
 0Bh   BYTE    "atp_addr_socket"
 0Ch   WORD    "atp_socket"
 0Eh   DWORD   pointer to buffer
 12h   WORD    buffer size
 14h   BYTE    "atp_interval"
 15h   BYTE    "atp_retry"
 16h   BYTE    ATP flags
       bit 5: exactly one transaction
 17h   BYTE    "atp_seqbit"
 18h   BYTE    transaction ID
 19h  4 BYTEs  ATP user bytes
 1Dh   BYTE    number of BDS buffers
 1Eh   BYTE    number of BDS responses
 1Fh   DWORD   pointer to BDS buffers (see below)

Format of Name Binding Protocol Name-to-Address binding entries for NBP_LOOKUP:
Offset Size    Description
 00h   WORD    "tup_address_network"
 02h   BYTE    "tup_address_notid"
 03h   BYTE    "tup_address_socket"
 04h   BYTE    "tup_enum"
 05h 99 BYTEs  name

Format of BDS entries:
Offset Size    Description
 00h   DWORD   pointer to buffer
 04h   WORD    size of buffer
 06h   WORD    BDS data size
 08h  4 BYTEs  "bds_userbytes"