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<TITLE>Int 31/AX=FF21h
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Int 31/AX=FF21h - CauseWay - GetMemDOS - ALLOCATE CONVENTIONAL MEMORY -
AX = FF21h
BX = number of paragraphs to allocate
Return: CF clear if successful
AX = real-mode segment of allocated block
DX = initial selector for block
CF set on error
AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
BX = size of largest available block
Note: if the requested size is greater than 64K, contiguous selectors will
be allocated, one for each 64K; for 32-bit applications, the first
">
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<h2>Int 31/AX=FF21h
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<h3><font color=#C00040>CauseWay - GetMemDOS - ALLOCATE CONVENTIONAL MEMORY</font></h3>
<PRE>
AX = FF21h
BX = number of paragraphs to allocate<br>
<p><b>Return:</b><br>CF clear if successful
AX = real-mode segment of allocated block
DX = initial selector for block
CF set on error
AX = DOS error code <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #01680 at INT 21/AH=59h/BX=0000h)
BX = size of largest available block
</PRE>
<p><b>Note:</b>
If the requested size is greater than 64K, contiguous selectors will
be allocated, one for each 64K; for 32-bit applications, the first
selector's limit will be set to the size of the entire block, while
that selector will have a limit of 64K for 16-bit applications. All
selectors after the first one have a limit of 64K except the final
one
<p><b>See Also:</b>
<a href="rb-5925.htm" tppabs="http://www.ctyme.com/intr/rb-5925.htm">AX=FF22h</a> - <a href="rb-5926.htm" tppabs="http://www.ctyme.com/intr/rb-5926.htm">AX=FF23h</a> - <a href="rb-2934.htm" tppabs="http://www.ctyme.com/intr/rb-2934.htm">INT 21/AH=48h</a>
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- <a href="int-31.htm" tppabs="http://www.ctyme.com/intr/int-31.htm">
Int 31h</a>
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