INT 31 P - CauseWay - "GetMemLinear" - ALLOCATE MEMORY WITHOUT SELECTOR
AX = FF10h
CX:DX = size of block in bytes
Return: CF clear if successful
SI:DI = linear address of allocated block
CF set on error
Note: this function may return addresses above 16M
SeeAlso: AX=FF0Bh,AX=FF11h,AX=FF12h,AX=FF14h