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Int 20/Vx=000Ah - Microsoft Windows - VDD - VxD SERVICES -
VxD = 000Ah
Note: the desired VxD and service number are identified by the data
immediately following the INT 20 instruction, as in:
INT 20h
DW service number
DW VxD identifier
SeeAlso: INT 2F/AX=1684hDEVICE API,INT 30Windows,#01265,#01340
(Table 01273)
Values for VDD (VxD ID 000Ah) service number:
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<h3><font color=#C00040>Microsoft Windows - VDD - VxD SERVICES</font></h3>
<PRE>
VxD = 000Ah
</PRE>
<p><b>Note:</b>
The desired VxD and service number are identified by the data
immediately following the INT 20 instruction, as in:
INT 20h
DW service number
DW VxD identifier
<p><b>See Also:</b>
<a href="rb-4501.htm" tppabs="http://www.ctyme.com/intr/rb-4501.htm">INT 2F/AX=1684h"DEVICE API"</a> - <a href="rb-5799.htm" tppabs="http://www.ctyme.com/intr/rb-5799.htm">INT 30"Windows"</a> - #01265 - #01340
<PRE>
<p>
<a name=table1273></a>
(Table 01273)
Values for VDD (VxD ID 000Ah) service number:
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".
DX = base I/O port number.
CL = number of contiguous ports???
10h "VDD_Get_VM_Info"
11h "VDD_Get_Special_VM_IDs".
<p><b>Return:</b><br>ESI = ???
EDI = ???
12h "VDD_Register_Extra_Screen_Selector"
13h "VDD_Takeover_VGA_Port".
DX = VGA I/O port number (03C2h, etc.).
ECX -> routine to call on I/O access.
<p><b>Return:</b><br>ECX -> previous handler (to be jumped to at end of new handler)
14h ???
15h ???
16h ...last service for Windows95 SP1
</PRE>
<p><b>See Also:</b>
#01272 - #01274 - #02648
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