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Int 68 Fn 03 - Appc/pc - Change Logical Unit [N]
AH = 03h subfn 2A00h
DS:DX -> control block (see below)
Return: control block updated
Format of control block:
Offset Size Description
00h 12 BYTEs reserved
0Ch WORD 2A00h (verb "Change Logical Unit")
0Eh 6 BYTEs 00h
14h DWORD (big-endian) return code (see AH=01h/SF=1B00h)
18h WORD 00h
1Ah 8 BYTEs (big-endian) logical unit ID
22h DWORD pointer to CREATE_TP_EXIT routine
FFFFFFFFh reject incoming ALLOCATEs
00000000h queue ALLOCATEs
26h DWORD 00000000h
2Ah DWORD pointer to SYSTEM_LOG_EXIT routine, FFFFFFFFh= don't log errors
2Eh DWORD 00000000h
32h BYTE maximum TPs
33h BYTE 00h stop QUEUE_ALLOCATEs
01h resume QUEUE_ALLOCATEs
34h DWORD pointer to LU_LU_PASSWORD_EXIT routine, FFFFFFFFh = no exit
38h DWORD 00000000h
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