{{page>en:templates:dosint}}

====== Int 21H, AH=4AH ======

===== Version =====

2 and higher

===== Brief =====

RESIZE MEMORY BLOCK

===== Family API =====


===== Input =====

	AH = 4Ah
	BX = new size in paragraphs
	ES = segment of block to resize

===== Return =====

   CF clear if successful
	CF set on error
	    AX = error code (07h,08h,09h) (see #01680 at AH=59h/BX=0000h)
	    BX = maximum paragraphs available for specified memory block

===== Notes =====

	under DOS 2.1-6.0, if there is insufficient memory to expand the block
	  as much as requested, the block will be made as large as possible
	DOS 2.1-6.0 coalesces any free blocks immediately following the block
	  to be resized
          
===== See also =====

 AH=48h,AH=49h,AH=83h

===== Note =====

Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]

{{page>en:templates:int}}

{{page>en:templates:fapi}}