partslist ZX81 Floppycontroller:

4  Resistors   220 Ohm
6  Resistors   350 Ohm (330 Ohm)
10 Resistors   4,4k (4,7k)
4  Resistors   10,2k (10k)
1  Resistor    30k***
1  Resistor    56k
1  Resistor    390k

1  Cap   1pF***
1  Cap   100pF
1  Cap   1nF
1  Cap   10nF
10 Caps 100nF
2  Tantal-Caps  3,3µF
5  Tantal-Caps  22µF

2  Diodes  1N4148
1  Transistor BC307
1  Crystal  4MHz

1  RAM-IC 2k*8 (6116)
1  EPROM 2k*8  (2716)
1  IC 74LS04
1  IC 74LS10
1  IC 74LS32
2  IC 74LS38
2  IC 74LS74
1  IC 74123
1  IC 74LS125 *
1  IC 74LS155
1  IC 74LS174
1  IC 74LS193
1  IC 74LS245
1  IC NE555
1  IC SAB-1793 (FDC)

1  connector 34pol.

*  do not use Texas-Instruments IC!
*** other combinations are possible: e.g. 20pF/1,5k, you have to tune it!