/* Imported from Wayback Machine Original URL : https://www.retrobrewcomputers.org/n8vem-gg-archive/html-2011/May/msg00153.html Snapshot date: 2025-11-30 Generator : wayback-archiver */ ---- [[[msg00179.html|Date Prev]]][[[msg00187.html|Date Next]]][[[msg00181.html|Thread Prev]]][[[msg00151.html|Thread Next]]][[[maillist.html#00153|Date Index]]][[[threads.html#00153|Thread Index]]] ====== EDM-80 a Z80 project board ====== ---- * //To//: N8VEM <> * //Subject//: EDM-80 a Z80 project board * //From//: Zilog_RatsNest <> * //Date//: Fri, 6 May 2011 11:44:09 -0700 (PDT) * //User-agent//: G2/1.0 ---- 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 ---- * **Follow-Ups**: * **[[msg00151.html|RE: [N8VEM: 9838] EDM-80 a Z80 project board]]** * //From:// "Andrew Lynch" * Prev by Date: **[[msg00179.html|Re: SBC V2 Build Successful, BIOS Question]]** * Next by Date: **[[msg00187.html|Re: [N8VEM: 9867] Re: SBC V2 Build Successful, BIOS Question]]** * Previous by thread: **[[msg00181.html|Re: SBC V2 Build Successful, BIOS Question]]** * Next by thread: **[[msg00151.html|RE: [N8VEM: 9838] EDM-80 a Z80 project board]]** * Index(es): * [[maillist.html#00153|**Date**]] * [[threads.html#00153|**Thread**]]