For anyone prepared to cover the cost of postage, I have a copy of the MIC-501/MIC-504 service manual (in English) and the MIC-500 operator's manual (in Chinese). I also have a number of CP/M manuals that are available on the same basis. A transfer to Malaysia early next year has forced me reluctantly to dispose of my 1983-built MIC-501 and associated terminal. Multitech Industrial Corporation (MIC) was the early English name of the company, now known as Acer Computers, started in Taiwan by Stan Shih. The MIC-501 and MIC-504 Z-80 machines were marketed as business computers and differed only in the capacity of their floppy drives. The MIC 500 series was marketed under that brand name in many jurisdictions in the early to mid-1980s. In some jurisdictions, local companies, such as Pericomp in Australia, self-branded the machine. I understand that prior ownership of the name 'Multitech' forced Stan Shih to adopt what has since become the global brand name 'Acer' (the name of his company has remained the same in Chinese). The MIC 500 series service manual is a photocopy (supplied to me by the company HQ in Taiwan - I bought my machine in Taiwan) of 80 pages dealing with: I Hardware Operation Theory II System Firmware III BIOS Implementation IV Mechanical Description V Trouble shooting with schematics. The MIC 500 series operator's manual is a glossy covered softback original, in Chinese, introducing the MIC and CP/M 2.2. In Oct 1994, through this newsgroup, I had contact with Greg Holdren at gholdren(a)citrus.sac.ca.us who had an MIC-504, so there is at least one person out there nursing an MIC-500 series machine. Cheers Bil -- Makati MM, Philippines http://www2.mozcom.com/~w_hansen/