Int 31 Fn FF0C  P - Causeway - "getmem32" - Allocate Block Of Memory (32-  [E]

   AX = FF0Ch
   ECX = size in bytes (FFFFFFFFh to get size of largest available block)

Return: CF clear if successful
       BX = selector for accessing block if requested size not FFFFh:FFFFh
       ECX = size of largest available block if requested FFFFh:FFFFh
   CF set on error

See Also: AX=FF0Bh,AX=FF0Eh,AX=FF0Fh,AX=FF11h