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Sorry if this is a bit off-subject ... I could use a hand with this Z80 based SBC - I've been trying for over 6 Months to gather additional information. It is called an EDM-80. Initially my take on it is an "Educational Development Module" used for courses in Computer Science classes. It is a Z80 based SBC w/several edge connectors supporting the Bus & Parallel Ports and has a full 25 pin RS-232 connector on board. CURRENTLY it does not work properly - I am working on a "TEST BIOS" for it. So far I can get it to access the ports and spit out some useful data to prove the board is OK. I can only assume the original BIOS it came with has a problem. The serial port just keeps spitting out garbage like it was stuck in a loop. My logic analyzer seems to support my initial findings. It is powered by a single +5vdc @ 800-1200ma (a single 7805 regulator won't work long) I would like to acquire more information on this particular SBC and any ADD-ON components and software (ROM code) it might have originally come with. So far ... the information I have developed from the hardware documentation and the EPROM state it might have a video controller board and runs as a smart terminal (for a lack of better words). The ports are addressed similar to a CP/M style system. Anyone hear of this unit? Thanks for your consideration, Ed