Z80 micro 2
===========
This is a simple Z80 computer:
 - 3.6864 MHz clock (see mc68681 DUART)
 - 64kb RAM (32kb accessible at any single time)
 - 32kb ROM
 - Dual serial UART (mc68681) with CTS/RTS flow control (1x RS232, 1x TTL-level)
 - Glue logic implemented in a ATF16V8 GAL (glue.pld)