Dalek Like in Dr Who?

Here is your Problem. You are stuck in the 80's

Get an Atmel or Phillips 89C52 or 87C52. The flash ROM is builtin, and the boot load is also builtin.
All your port pins are free. You lose the 8255 the EPROM and decoder. You hook up a MAX232 chip to the serial pin and you can program it from you PC. They even give you the download software free.

So
5 pins motors
10 pins led`s
4 pins micro switches
9 pins 20 way key pad
6 pins lcd
2 comm port
= 36 pins only 32 on a standard Chip you only need 4 more. Combine some or get a Shift or latched LED Driver and you are golden.

In the U.S. they built Full scale R2-D2's In the UK I guess it is both. Good luck.

PS: Some history for the young folk. Back in the early 90's UV 8752 was expensive. The multi-chip solutuion was cheaper by far.
Now the single chip solution is cheaper.