For more details, please read "Ralf Brown's Interrupt List" If you need this doc, look for it on the internet and you will find out, or you can get from me.
Int 21/AX=5F00h - DOS 3.1+ network - GET REDIRECTION MODE
Int 21/AX=5F01h - DOS 3.1+ network - SET REDIRECTION MODE
Int 21/AX=5F02h - DOS 3.1+ network - GET REDIRECTION LIST ENTRY
Int 21/AX=5F03h - DOS 3.1+ network - REDIRECT DEVICE
Int 21/AX=5F04h - DOS 3.1+ network - CANCEL REDIRECTION
Int 21/AX=5F05h - DOS 4.0+ network - GET EXTENDED REDIRECTION LIST ENTRY
Int 21/AX=5F05h - STARLITE architecture - MAP LOCAL DRIVE LETTER TO REMOTE FILE SYSTEM
Int 21/AX=5F06h - Network - GET FULL REDIRECTION LIST
Int 21/AX=5F06h - STARLITE architecture - UNMAP DRIVE LETTER
Int 21/AX=5F07h - DOS 5+ - ENABLE DRIVE
Int 21/AX=5F07h - STARLITE architecture - MAKE NAMED OBJECT AVAILABLE ON NETWORK
Int 21/AX=5F08h - DOS 5+ - DISABLE DRIVE
Int 21/AX=5F08h - STARLITE architecture - REMOVE GLOBAL NETWORK NAME OF OBJECT
Int 21/AX=5F09h - STARLITE architecture - BIND TO NETWORK DEVICE
Int 21/AX=5F0Ah - STARLITE architecture - DETACH FROM NETWORK DEVICE
Int 21/AX=5F30h - LAN Manager Enhanced DOS - GET REDIRECTOR VERSION
Int 21/AX=5F32h - Named Pipes - LOCAL DosQNmPipeInfo
Int 21/AX=5F33h - Named Pipes - LOCAL DosQNmPHandState
Int 21/AX=5F34h - Named Pipes - LOCAL DosSetNmPHandState
Int 21/AX=5F35h - Named Pipes - LOCAL DosPeekNmPipe
Int 21/AX=5F36h - Named Pipes - LOCAL DosTransactNmPipe
Int 21/AX=5F37h - Named Pipes - DosCallNmPipe
Int 21/AX=5F38h - Named Pipes - LOCAL DosWaitNmPipe - AWAIT AVAIL. OF PIPE INSTANCE
Int 21/AX=5F39h - Named Pipes - LOCAL DosRawReadNmPipe
Int 21/AX=5F3Ah - Named Pipes - LOCAL DosRawWriteNmPipe
Int 21/AX=5F3Bh - LAN Manager Enhanced DOS - NetHandleSetInfo
Int 21/AX=5F3Ch - LAN Manager Enhanced DOS - NetHandleGetInfo
Int 21/AX=5F3Dh - LAN Manager Enhanced DOS - WRITE MAILSLOT???
Int 21/AX=5F3Eh - LAN Manager Enhanced DOS - LOCAL NetSpecialSMB
Int 21/AX=5F3Fh - LAN Manager Enhanced DOS - REMOTE API CALL
Int 21/AX=5F40h - LAN Manager Enhanced DOS - LOCAL NetMessageBufferSend
Int 21/AX=5F41h - LAN Manager Enhanced DOS - LOCAL NetServiceEnum
Int 21/AX=5F42h - LAN Manager Enhanced DOS - LOCAL NetServiceControl
Int 21/AX=5F43h - LAN Manager Enhanced DOS - LOCAL DosPrintJobGetId
Int 21/AX=5F44h - LAN Manager Enhanced DOS - LOCAL NetWkstaGetInfo
Int 21/AX=5F45h - LAN Manager Enhanced DOS - LOCAL NetWkstaSetInfo
Int 21/AX=5F46h - LAN Manager Enhanced DOS - LOCAL NetUseEnum
Int 21/AX=5F47h - LAN Manager Enhanced DOS - LOCAL NetUseAdd
Int 21/AX=5F48h - LAN Manager Enhanced DOS - LOCAL NetUseDel
Int 21/AX=5F49h - LAN Manager Enhanced DOS - NetUseGetInfo
Int 21/AX=5F4Ah - LAN Manager Enhanced DOS - LOCAL NetRemoteCopy
Int 21/AX=5F4Bh - LAN Manager Enhanced DOS - LOCAL NetRemoteMove
Int 21/AX=5F4Ch - LAN Manager Enhanced DOS - LOCAL NetServerEnum
Int 21/AX=5F4Dh - LAN Manager Enhanced DOS - DosMakeMailslot
Int 21/AX=5F4Eh - LAN Manager Enhanced DOS - DosDeleteMailslot
Int 21/AX=5F4Fh - LAN Manager Enhanced DOS - DosMailslotInfo
Int 21/AX=5F50h - LAN Manager Enhanced DOS - DosReadMailslot
Int 21/AX=5F51h - LAN Manager Enhanced DOS - DosPeekMailslot
Int 21/AX=5F52h - LAN Manager Enhanced DOS - DosWriteMailslot
Int 21/AX=5F53h - LAN Manager Enhanced DOS - NetServerEnum2
Int 21/AX=5F55h - LAN Manager Enhanced DOS - KILL ALL CONNECTIONS???
Int 21/AX=5F80h - LANtastic - GET LOGIN ENTRY
Int 21/AX=5F81h - LANtastic - LOGIN TO SERVER
Int 21/AX=5F82h - LANtastic - LOGOUT FROM SERVER
Int 21/AX=5F83h - LANtastic - GET USERNAME ENTRY
Int 21/AX=5F84h - LANtastic - GET INACTIVE SERVER ENTRY
Int 21/AX=5F85h - LANtastic - CHANGE PASSWORD
Int 21/AX=5F86h - LANtastic - DISABLE ACCOUNT
Int 21/AX=5F87h - LANtastic v3+ - GET ACCOUNT
Int 21/AX=5F88h - LANtastic v4.0+ - LOGOUT FROM ALL SERVERS
Int 21/AX=5F97h - LANtastic - COPY FILE
Int 21/AX=5F98h - LANtastic - SEND UNSOLICITED MESSAGE
Int 21/AX=5F99h - LANtastic - GET LAST RECEIVED UNSOLICITED MESSAGE
Int 21/AX=5F9Ah - LANtastic - GET MESSAGE PROCESSING FLAGS
Int 21/AX=5F9Bh - LANtastic - SET MESSAGE PROCESSING FLAGS
Int 21/AX=5F9Ch - LANtastic v3+ - POP UP LAST RECEIVED MESSAGE
Int 21/AX=5F9Dh - LANtastic v4.1+ - GET REDIRECTOR CONTROL BITS
Int 21/AX=5F9Eh - LANtastic v4.1+ - SET REDIRECTOR CONTROL BITS
Int 21/AX=5FA0h - LANtastic - GET QUEUE ENTRY
Int 21/AX=5FA1h - LANtastic - SET QUEUE ENTRY
Int 21/AX=5FA2h - LANtastic - CONTROL QUEUE
Int 21/AX=5FA3h - LANtastic v3+ - GET PRINTER STATUS
Int 21/AX=5FA4h - LANtastic v3+ - GET STREAM INFO
Int 21/AX=5FA5h - LANtastic v3+ - SET STREAM INFO
Int 21/AX=5FA7h - LANtastic - CREATE USER AUDIT ENTRY
Int 21/AX=5FA9h - LANtastic v4.1+ - SET EXTENDED QUEUE ENTRY
Int 21/AX=5FB0h - LANtastic - GET ACTIVE USER INFORMATION
Int 21/AX=5FB1h - LANtastic - GET SHARED DIRECTORY INFORMATION
Int 21/AX=5FB2h - LANtastic v3+ - GET USERNAME FROM ACCOUNT FILE
Int 21/AX=5FB3h - LANtastic v3+ - TRANSLATE PATH
Int 21/AX=5FB4h - LANtastic v3+ - CREATE INDIRECT FILE
Int 21/AX=5FB5h - LANtastic v3+ - GET INDIRECT FILE CONTENTS
Int 21/AX=5FB6h - LANtastic v4.1+ - SET AUTO-LOGIN DEFAULTS
Int 21/AX=5FB7h - LANtastic v4.1+ - GET AUTO-LOGIN DEFAULTS
Int 21/AX=5FC0h - LANtastic - GET TIME FROM SERVER
Int 21/AX=5FC8h - LANtastic v4.0+ - SCHEDULE SERVER SHUTDOWN
Int 21/AX=5FC9h - LANtastic v4.0+ - CANCEL SERVER SHUTDOWN
Int 21/AX=5FCAh - LANtastic v4.0+ - STUFF SERVER KEYBOARD BUFFER
Int 21/AX=5FCBh - LANtastic v4.1+ - TERMINATE USER
Int 21/AX=5FCCh - LANtastic v4.1+ - GET/SET SERVER CONTROL BITS
Int 21/AX=5FCDh - LANtastic v4.1+ - FLUSH SERVER CACHES
Int 21/AX=5FD0h - LANtastic - GET REDIRECTED PRINTER TIMEOUT
Int 21/AX=5FD1h - LANtastic - SET REDIRECTED PRINTER TIMEOUT
Int 21/AX=5FE0h - LANtastic - GET DOS SERVICE VECTOR
Int 21/AX=5FE1h - LANtastic - SET DOS SERVICE VECTOR
Int 21/AX=5FE2h - LANtastic - GET MESSAGE SERVICE VECTOR
Int 21/AX=5FE3h - LANtastic - SET MESSAGE SERVICE VECTOR