Dear BkkCoins,
Can you please elaborate a little about the changes that you made to the circuit, to make it work? I know about the missing power to the PIC, and the little jumper cable that you soldered to power it. What is that small red PCB doing? I also got a sample board made around the time you did. I also got 2 sample chips that I have mounted. But for some reason the board is not hashing.
The red board has 2 NOR gates wired as I described a few posts back up above.
I use a trailing edge delay circuit. The first NOR gate has P and N, and it's output goes to A of 2nd NOR gate, then through a 100R resistor to B of 2nd gate. B has the 30pF to GND. So the 2nd NOR is ORing the clock with a delayed clock. The UART is set for rising edge capture, and data is inverted when read out of FIFO (~RCREG). This will be updated in the schematic very soon.
The reason it's on a second board is that I had changed the parts so many times on the main board that the PCB traces lifted off. I tried at first to wire the 2nd NOR gate in dead bug style next to the first, but the legs on that tiny gate are too delicate for me and kept coming off. I think I wasted about 4 or 5 over the time I did all that. Once I dug out that board and soldered it down it was easy to connect wires and hook it to the sides of the pullup resistors on main board. The NOR gate on main board was removed because it's output pad had lifted and leg broke off.
Thanks a lot. Do the latest Kicad files in the Git repository reflect these changes?