DCSINT - Int, Serv, for Data Communication System 630

The document contains the assembly source code for the 'DCSINT' subroutine, designed for the Digital Equipment Corp. Data Communication System 630. It includes definitions for hardware interface, interrupt handling, and accumulator assignments for the system scanner. The source is written in the MACRO assembly language and covers device initialization, interrupt service routines, and communication between the scanner and TTY devices.