I am currently in the process of wiring a 16550 UART to my Z80 computer. As a test I thought I would use the UART frequency (1.8432 Mhz) in one of those little four leg metal packages as both the input to the UART and the Z80. Will this have any adverse effects on my circuit, such as make it not work? I am attaching my schematic, and my code for reference. Thanks for the help!