Get two latches i.e. 74HC573 and map them into memory. Could be done with gates or a PAL. Connect the inputs of the 573's to the A/D lines, the outputs to the LCD. One latch is used for the control-lines and one for DATA.
Write to the latches using MOVX @DPTR etc. It's also easy to control the timing of the LCD's this way. Just make a delay-loop.