Or ... Things to make and do with ZXpand

Because BASIC doesn't support IN and OUT instructions you will need a bit of POKEing but nothing an adult human can't handle.

Disco

The LEDs on the Zxpands are controllable from software. With a simple OUT instruction you can turn them on and off again. Here's some BASIC to try:

  10 REM ........
  15 LET L=16514
  20 POKE L,62
  30 POKE L+2,1
  40 POKE L+3,7
  50 POKE L+4,224
  60 POKE L+5,237
  70 POKE L+6,121
  80 POKE L+7,201
 100 POKE L+1,182
 110 RAND USR L
 120 POKE L+1,184
 130 RAND USR L
 140 POKE L+1,183
 150 RAND USR L
 160 POKE L+1,185
 170 RAND USR L
 180 GOTO 100

Or for those more machine code inclined:

    ld   a,xyz
    ld   bc,$e007
    out (c),a

xyz Value	Function
$b6	green led on
$b7	green led off
$b8	red led on
$b9	red led off