Revised version
Now with two oscillators, individual adjust speed for CPU and 68B50.
The I/O address of 68B50 can be selected, and now working with ROMWBW.
Also fixed the blinking LEDs for TX and RX.

Description

• Z80 CPU
• MC68B50P ACIA
• 51 x 102 mm
• RC40+10 bus connector

• PCB - 63b
• Z80 CPU - Z84C0020xxx
• DIP-40 socket
• MC68B50P ACIA
• DIP-24 socket
• 74HCT138
• DIP-16 socket
• 74HCT02
• DIP-14 socket
• 100nF capacitors (6x) (C1-C6)
• 10k resistor (5x) (R1-R5)
• 2k2 resistor (3x) (R6-R8)
• 330ohm resistors (2x) (R9-R10)
• Crystal Oscillator (2x)
• —> rec. 7.3728Mhz for serial and 20Mhz for CPU
• LEDs (2x)
• pins and jumpers
• 1x6 angled male pin
• 2x40 pin angled male connector (remove some pins)