Int 2F/AX=43E0h/BX=0000h

DOS Protected Mode Services (DPMS) v1.0 - INSTALLATION CHECK

AX = 43E0h
BX = 0000h
CX = 4450h ('DP')
DX = 4D53h ('MS')

Return:
AX = 0000h if installed
CF clear
ES:DI -> server structure (see #02791)
ES:BX -> registration structure (pre-NWDOS 7 beta spec) (see #02793)

Note: The DPMS 1.0 server included with the original release of Novell DOS 7.0 supports both the beta and 1.0 specification, setting ES:BX even if CX and DX are not as specified on entry (since the beta specification did not use those registers). However, the DPMS 1.1 server included with the March 1994 update does not support the beta specification

See Also: AX=43E1h - AX=43E2h - AX=43E3h - INT 2F/AX=1687

Index:
Signature strings;DPMS

Format of DPMS 1.0 server structure:

Offset  Size    Description     (Table 02791)
00h  4 BYTEs   signature string "DPMS"
04h  2 BYTEs   DPMS version (major,minor)
06h  8 BYTEs   blank-padded server OEM name
0Eh  2 BYTEs   OEM server version (major,minor)
10h    WORD    DPMS flags (see #02792)
12h    BYTE    CPU type
(02h = 286, 03h = 386 or higher, higher values allowed)

Bitfields for DPMS flags:

Bit(s)  Description     (Table 02792)
0      fast processor reset available (286 only)
1      DPMS server is enabled
2      memory is remapped
3-15   reserved (undefined)

Format of beta DPMS registration structure:

Offset  Size    Description     (Table 02793)
00h    DWORD   real-mode API entry point (see #02795)
04h    DWORD   16-bit protected-mode API entry point (see #02795)
08h  8 BYTEs   reserved (0)
10h  8 BYTEs   blank-padded server OEM name
18h    WORD    flags
bit 0:
Fast processor reset available (286 only)
bits 1-15 reserved (undefined)
1Ah  2 BYTEs   DPMS version (major,minor)
1Ch    BYTE    CPU type (02h = 286, 03h = 386 or higher)

Category: DOS Extenders - Int 2Fh - D

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