Today I ordered the pcbs.
Not only the 1x1 pcb itself was ordered, but also two other ones:
- A DIP-IC version of the pcb (3.3 x 3.0 Inch), called NAC (Non-Alu-Cpu). This will be built before the 1x1 version (that has TSSOP sized chips). Debugging will be a lot easier when you can actually see and change connections.
- An application pcb that uses the 1x1 as processor. It can alternatively connect to the NAC pcb. It has the external RAM and ROM that the cpu needs, an interface for the RPi programmer, and a few I/O connections. It can also be used for a simple fixed application: It has 6 displays, a few buttons, and a divider chain driven by 32KHz xtal, so we can program a simple CLOCK .