XEROX1108 Users Guide23SECTION 1XEROX 1108 OVERVIEWThis section describes the day-to-day operation of the Xerox 1108. Consult subsequent sectionsfor this manual for detailed explanations of the operational procedures sketched below.OPERATIONS OVERVIEWOnce the Xerox 1108 has been properly loaded with Xerox software, its operation is straight-forward. Powering up the Xerox 1108 automatically starts Interlisp-D. When the user has com-pleted a session, he does a (LOGOUT) which saves the state of the current session until thenext time Interlisp-D is started. The process of logging out puts the Xerox 1108 in its base state:a black screen with a small bouncing white window. From this state it is possible to: (a) resumean earlier Interlisp-D session; (b) load fresh versions of Interlisp-D; (c) run machine diagnostics. On Xerox 1108s with sufficient disk storage, more than one Interlisp-D environment can be main-tained on the local disk. Separate software projects can be supported under each environment.To switch from one project to another, (LOGOUT) of the first environment and enter the second.Special software is provided to facilitate this switching back and forth.Occasionally errors and problems arise during the operation of the Xerox 1108. These areusually signalled via the LED lights on the Maintenance Panel. Refer to the section entitled MPCode Summary for help in diagnosing such problems.THE LOCAL DISKThe Xerox 1108 is equipped with a 10, 29, or 42 Megabyte local disk. The disk is formatted intotwo or more logical volumes; the number and size of these logical volumes depends on the sizeof the disk. The disk is partitioned using utility software distributed by Xerox. In subsequentreleases of this software, the user will be able to define the name and size of each logicalvolume.Logical volume Diagnostics contains software for running diagnostics on the display, keyboard,mouse, floppy disk drive, and Ethernet. It also contains a software package, the Lisp InstallationTool, for initializing the local disk with Lisp software and switching back and forth betweenInterlisp-D environments stored on the local disk. Logical volumes Lisp, Lisp2, and Lisp3 can each contain a complete Interlisp-D environment.Although the Xerox 1108 can operate out of only one logical volume at a time, within eachlogical volume an independent software project can be developed. As mentioned, the LispInstallation Tool is used to switch the Xerox 1108 from one logical volume to another. gdp X q@pgd*?d F*j)p(;]s#l[gV(p DgS TgPsgL