VT180 Series

This document is a technical manual for service engineers and technicians, providing comprehensive information on the Digital Equipment Corporation VT180 personal office computer. The VT180 can operate either as a personal computer running the CP/M operating system or as a terminal emulating a VT100.

The manual is structured into seven chapters and three appendices. It details VT180 specifications, including physical dimensions, environmental and electrical requirements, video display, keyboard, audible signals, communication, and disk drive characteristics. It provides basic operator instructions, covering terminal modes (personal computer, on-line, off-line, set-up), keyboard controls, visual and audible indicators, and set-up feature selection. Installation and interface procedures are outlined, including unpacking, upgrading a VT100 with the VT18X kit, system interconnections, and power-up sequences with self-tests. The document also guides on CP/M operation, diskette handling, and setting serial port transmission characteristics. A substantial section offers a technical description of the VT100's functional components and the VT18X control module, detailing its Z80A CPU, memory, communication ports, and RX180 disk drive controller. Finally, it covers service information, including ROM diagnostics, diskette diagnostics, troubleshooting, video alignment, and module removal and installation procedures. Appendices include programming information, a recommended spares list, and a glossary.