INT 31 - CauseWay - "RelMemDOS" - RELEASE CONVENTIONAL MEMORY BLOCK AX = FF23h DX = initial selector for block Return: CF clear if successful CF set on error AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h) Note: all descriptors allocated for the block are freed SeeAlso: AX=FF21h,AX=FF22h,INT 21/AH=4Ah