The Z88 is organized around four integrated circuits: the Z80 microprocessor, a specialized gate-array called 'Blink', the ROM chip and a pseudo-static RAM chip. There are 8 connectors on the motherboard. This part describes the pinout, the usage and modifications if they are possible.
Z80 CPU (IC1)
Blink gate-array (IC4)
External hardware via slot connector
The following pages will detail each of the above.