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Values for VDD (VxD ID 000Ah) service number

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Value Description

00h

get version

01h

PIF state

02h

get GrabRtn

03h

hide cursor

04h

set VM type

05h

get ModTime

06h

set HCurTrk

07h

message clear screen

08h

message foreground color

09h

message background color

0Ah

message output text

0Bh

message set cursor position

0Ch

query access

0Dh

"VDD_Check_Update_Soon"

0Eh

"VDD_Get_Mini_Dispatch_Table"

0Fh

"VDD_Register_Virtual_Port"

Call:

 

DX = base I/O port number
CL =  number of contiguous ports???

10h

"VDD_Get_VM_Info"

11h

"VDD_Get_Special_VM_IDs"

Return:

ESI = ???
EDI = ???

12h

"VDD_Register_Extra_Screen_Selector"

13h

"VDD_Takeover_VGA_Port"

Call:

DX = VGA I/O port number (03C2h, etc.)
ECX routine to call on I/O access
Return: ECX previous handler (to be jumped to at end of new handler)

14h

???

15h

???

16h

...last service for Windows95 SP1

See Also:

#01272,#01274,#02648