The board is designed to use either an MC6809 (on-chip clock generator) or MC6809E (external clock generator). This works because I don't require any of the functionality that differs between the two versions (DMA~BUSY, MRDY~AVMA, TSC, LIC). Switching between the two types requires configuring a jumper and including or eliminating one IC.
Display is 16 lines x 32 characters, using an 8 x 8 grid for each character. Fonts are contained in a 2732A EPROM, so can be changed and custom characters added.