This is the project version that builds the FPGA bitstream for the Tang Nano 9K version of the A2FPGA Apple II card.
The A2N9 version only supports Apple II and //e models. The card will not work correctly in a IIgs. It uses discrete 74* series logic to interface and level-shift the necessary Apple II bus signals to the FPGA module.
The A2N9 does the build have support for IIgs graphics modes. However all II and //e modes and soft switches are supported on any II or //e model even those most software will not use //e features on non-//e models.
It also does not have the SuperSprite capability included.
To update the bitstream on the A2N9, the most convenient way is to use OpenFPGALoader
Mac users with Homebrew can just type brew install openfpgaloader in the Terminal to install it
Use OpenFPGALoader to program the Tang Nano 9K board via USB with the a2n9.fs bistream file and run openfpgaloader -b tangnano9k -f a2n9.fs
The project can also be opened and built with the Gowin IDE, either educational
or commercial editions. Use the a2n9.gprj file in this folder.
Note: When using the Gowin IDE, do not add or remove files from the project or it will turn the relative file paths into absolute file paths.