This is a pre-production prototype. It does not represent the final product.

The production version will include (at least) the following changes:

- PCB schematic: The SH7091 SCIF is able to use the RTS2 and CTS2 signals as
  GPIO. However, if RTS and CTS are routed to ADBUS on the FT232H, it is not
  possible to simultaneously configure ADBUS signals as both UART and GPIO. For
  this reason, a new PCB revision will instead route RTS/CTS to the FT232H
  ACBUS. This will allow simultaneous RX/TX UART on ADBUS and GPIO on ACBUS. The
  intent is to allow for more interesting out-of-band signaling, in addition to
  what is possible with a plain UART.

- PCB schematic: rearranged all ACBUS connections; LEDs moved from ACBUS8/ACBUS9
  to ACBUS0/ACBUS1; G-RESET moved from ACBUS1 to ACBUS5; SCK moved from ACBUS0
  to ACBUS6.

- PCB layout: increase the size of the serial connector footprint pads

- PCB layout: increase clearance between passive components and serial connector footprint

- PCB layout: complete redraw

- PCB layout: changed USB connector type from USB Mini-B to USB Type-C

- PCB layout: replaced FT232HL with FT232HQ due to component shortage

- Serial connector: shield tin-plating applied at the factory

- Serial connector: conductive pin tin-plating applied at the factory

- Serial connector: increase thickness of shield pins

- Serial connector: slightly redimensioned to reduce grinding required for a
  perfect fit in the female connector

- Serial connector: holes at the front of the pin guides were removed; this is
  to prevent inconsistent bridging seen in some earlier samples

Other changes that are under consideration:

- possible inclusion of a Nylon case/enclosure for the PCB (depending on feedback/demand)