INT 21 - TopWare Network OS v5.10+ - RECEIVE OF USER-DEFINED PACKETS AX = FF9Ah ES:BX -> buffer for user-defined packet (see #02532) Return: nothing Format of TopWare user-defined packet: Offset Size Description (Table 02532) 00h BYTE FFh 01h WORD (call) length of data field plus 3 (ret) length of received message (0000h if none received) 03h BYTE destination ID (FFh for broadcast message) 04h BYTE sending station ID 05h BYTE type code (11h; all other codes reserved for TopWare) 06h N BYTEs received message