PRO169 PRO 2780/3870 Communications Applications Version: 1.2, May 1987 Submitted by: Digital Equipment Corporation Operating System: P/OS Hardware Required: RCD5X Hard Disk Keywords: Utilities - P/OS Abstract: PRO-2780/3780 is an application for the Professional 300 series of personal computers that provides communications to systems with capabilities similar to IBM 2780 and 3780 remote batch terminals. The product runs under the P/OS Hard Disk Operating System. PRO-2780/3780 operates using a single, point-to-point communications line. This line can be half- or full- duplex, and transmission speeds of up to 9600 bits per second can be achieved on an otherwise idle system. The user interacts with the product by means of a hierarchy of menus and forms. The product also supplies the user with help information that provides a brief description of the product and its menus. The communications discipline implemented by PRO-2780/3780 is a subset of IBM's Binary Synchronous Communications (BSC) protocol that uses EBCDIC transmission code. Horizontal format control records can be received and processed. A subset of vertical format control escape sequences is supported, specifically single, double and triple space, form feed and space suppress. Any block addressable storage device supported by P/OS can be used as a source of transmission files. Both fixed length (80 character card image) and variable length files can be transmitted as EBCDIC (automatically translated from ASCII) or binary data (no translation). BSC control characters are automatically added to the data before transmission and stripped on reception. Any block addressable storage device supported by P/OS can be used to receive files. Optionally, received print files can be sent to a printer, if one is attached to the Professional System. The following 2780/3780 remote batch terminal features are supported: . 2780 multiple record transmission option . Transparent mode . 3780 space compression . Variable vertical and horizontal forms control Notes: Sources not available. Documentation available in hardcopy only. Sources not included. Media (Service Charge Code): User's Manual (EC), One RX50 Diskette (JA) Format: FILES-11