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The N8 is intended to be a "home brew" style computer in the style of early 1980's all-in-one home computers with a usable set of features such as color graphics, audio, an assortment of mass storage options, a variety of ports, etc. Although a bus expansion is supported no additional boards are required.
The N8 is designed so builders can assemble it themselves using common tools such as basic soldering iron, VOM, etc. It is a simple two-layer board construction using all commonly available plated-through-hole (DIP and PLCC) components without requiring any SMT skills, programmable logic devices, etc.
A quick summary of the N8 features:
ROM Support included in
Changes and Errata
Successful serial communication with the ZS180 requires the DCD to be low. On the N8 board DCD is pin 47 of the ZS180. This line is tied to ground via resistor R42 (2K2). This resistor value may be too high. If you are unable to see serial output then try bridging this resistor so pin 47 is connected to ground.