Function 4Ah

Modify Allocated Memory Block

Changes the size of a memory block previously allocated by Function 48h.

Input:

AH = 4Ah

BX = new memory size in paragraphs

ES = segment of block address

Output:

CF = 0 function is successful

CF = 1 function is unsuccessful

AX = error code

07h = memory control block destroyed

08h = insufficient memory

09h = incorrect memory block address

BX = Max number of Paragraphs Available

Comments: