Apple-1-HW/verilog-apple-one
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@ -44,6 +44,16 @@ Registers:
This project should just build with IceCube2 without any issue, and I will figure out how to make it work with Yosys shortly.
## External Devices / Hook-up
To connect the LED&KEYs to the breakout board the following pins are defined in the constraints file.
Pin | ID | Description
--- | -- | -----------
P1 | CLK | The clock used to clock data in and out of the LED&KEYs
P2 | DIO | The tristate digital I/O pin
R1 | STB | The "chipselect" / strobe line
## Serial Setup
To communicate with the Apple 1 you need to use the second channel serial interface for the iCE40HX8K-B-EVN board. This should appear as a COM port on you PC. This project is configured to use the 12MHz onboard clock to generate the baud rate, and as such I've selected 4800 baud (8/N/1) as this was the only baud rate that rounded nicely to 12MHz without an error rate.