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<TITLE>Int 31/AX=0203h
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Int 31/AX=0203h - DPMI 0.9+ - SET PROCESSOR EXCEPTION HANDLER VECTOR -
AX = 0203h
BL = exception number (00h-1Fh)
CX:(E)DX = selector:offset of handler
Return: CF clear if successful
CF set on error
AX = error code (DPMI 1.0+) (8021h,8022h) (see #03143)
Notes: 32-bit programs must supply an offset in EDX and use a 32-bit interrupt
stack frame on chaining to the next exception handler
the handler should return using a FAR return
all fault stack frames contain an error code, but it is only valid for
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<h2>Int 31/AX=0203h
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<h3><font color=#C00040>DPMI 0.9+ - SET PROCESSOR EXCEPTION HANDLER VECTOR</font></h3>
<PRE>
AX = 0203h
BL = exception number (00h-1Fh)
CX:(E)DX = selector:offset of handler<br>
<p><b>Return:</b><br>CF clear if successful
CF set on error
AX = error code (DPMI 1.0+) (8021h,8022h) <a href="rb-5802.htm#Table3143" tppabs="http://www.ctyme.com/intr/rb-5802.htm#Table3143">(see #03143)</a>
</PRE>
<p><b>Notes:</b>
32-bit programs must supply an offset in EDX and use a 32-bit interrupt
stack frame on chaining to the next exception handler.
The handler should return using a FAR return.
All fault stack frames contain an error code, but it is only valid for
exceptions 08h and 0Ah-0Eh.
Handlers will only be called if the exception occurs in protected mode,
and the DPMI host does not transparently handle the exception.
The handler may change certain values on the stack frame
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DPMI 1.0+ supports this function only for backward compatibility; use
AX=0212h or AX=0213h instead.
Not supported by MS Windows 3.0 in Standard mode
<p><b>See Also:</b>
<a href="rb-5823.htm" tppabs="http://www.ctyme.com/intr/rb-5823.htm">AX=0202h</a> - <a href="rb-5829.htm" tppabs="http://www.ctyme.com/intr/rb-5829.htm">AX=0212h</a> - <a href="rb-5830.htm" tppabs="http://www.ctyme.com/intr/rb-5830.htm">AX=0213h</a> - <a href="rb-5753.htm" tppabs="http://www.ctyme.com/intr/rb-5753.htm">INT 2F/AX=FB42
<PRE>
<p>
<p><b>Format of stack frame for 16-bit programs:</b><br>(offset from SS:SP)
<a name=table3146></a>
Offset Size Description (Table 03146)
00h DWORD return CS:IP (do not change)
04h WORD error code
06h DWORD CS:IP of exception
0Ah WORD flags
0Ch DWORD SS:SP
<p>
<p><b>Format of stack frame for 32-bit programs:</b><br>(offset from SS:ESP)
<a name=table3147></a>
Offset Size Description (Table 03147)
00h DWORD return EIP (do not change)
04h WORD return CS selector (do not change)
06h WORD reserved (do not change)
08h DWORD error code
0Ch DWORD EIP of exception
10h WORD CS selector of exception
12h WORD reserved (do not change)
14h DWORD EFLAGS
18h DWORD ESP
1Ch WORD SS
1Eh WORD reserved (do not change)
</PRE>
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