INT 21 - DOS 2+ - RESIZE MEMORY BLOCK
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 AH=59h)
BX = maximum paragraphs available for specified memory block
Notes:  under DOS 2.1-5.0, if there is insufficient memory to expand the block
as much as requested, the block will be made as large as possible
DOS 2.1-5.0 coalesces any free blocks immediately following the block
to be resized
SeeAlso: AH=49h,AH=83h

See also: 2148

214A - DOS 2+ - RESIZE MEMORY BLOCK