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<TITLE>Int 20/Vx=0004h
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Int 20/Vx=0004h - Microsoft Windows - VDMAD - VxD SERVICES -
VxD = 0004h
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 01268)
Values for VDMAD (VxD ID 0004h) service number:
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<h3><font color=#C00040>Microsoft Windows - VDMAD - VxD SERVICES</font></h3>
<PRE>
VxD = 0004h
</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=table1268></a>
(Table 01268)
Values for VDMAD (VxD ID 0004h) service number:
0000h get version
0001h virtualize channel
0002h get region information
0003h set region information
0004h get virtual state
0005h set virtual state
0006h set physical state
0007h mask channel
0008h unmask channel
0009h lock DMA region
000Ah unlock DMA region
000Bh scatter lock
000Ch scatter unlock
000Dh reserve buffer space
000Eh request buffer
000Fh release buffer
0010h copy to buffer
0011h copy from buffer
0012h default handler
0013h disable translation
0014h enable translation
0015h get EISA address mode
0016h set EISA address mode
0017h unlock DMA region (ND)
0018h "VDMAD_Phys_Mask_Channel"
0019h "VDMAD_Phys_Unmask_Channel"
001Ah "VDMAD_Unvirtualize_Channel"
001Bh "VDMAD_Set_IO_Address"
001Ch "VDMAD_Get_Phys_Count"
001Dh "VDMAD_Get_Phys_Status"
001Eh "VDMAD_Get_Max_Phys_Page"
001Fh "VDMAD_Set_Channel_Callbacks"
0020h "VDMAD_Get_Virt_Count"
0021h "VDMAD_Set_Virt_Count"
0021h ...last service for Windows95 SP1
</PRE>
<p><b>See Also:</b>
#01267 - #02646 - #02683 at INT 2F/AX=1684h/BX=0444h
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