Prototyping the extra Flash ROM has turned out to be harder than I thought. I have decided touse a 8 Mb / 1 MB LPC bus Flash part. Since it uses the LPC bus, there is not a lot of signals to hook up. I tried to find a socket for the chip locally, but no one had one. I will need to order it from Digikey. But for the first prototype, I will just wire it up. This will allow me to get the code debugged. I have added the code to the FPGA, but without the circuit I cannot test it. I was hopeing that I would get some time over the holiday to build the circuit. But it looks like I will have to wait until I go back to work after the new year.
For the final verion of the circuit, I will add a few other things with the Flash memory. I really need to add some static ram also. This is needed to emulate a floppy disk drive. I want to make it software compatable with the Disk II. I alos want to add a small speaker fot the sound. Last but not least will be a joystick interface. With all this added hardware, I can play some of the games under DOS.