1 XEROX 1186 USER'S GUIDE 1 XEROX 1186 USER'S GUIDE Input/Output 1 Input/Output 1 7. INPUT/OUTPUT 6 Input/output on the Xerox 1186 is supported in many ways: by keyboard, display, mouse, rigid disk, Ethernet, floppy disk, and RS232 communications. This chapter only covers aspects of the last two: the floppy disk and RS232 communications. 2 Copying Floppy Disks 1 Floppy disks may be copied with the use of the Floppy Disk Copy Utility provided on floppy disk. This utility allows you to copy an entire floppy image from a source floppy disk to a destination floppy disk. 2 Using the Floppy Disk Copy Utility 1 Insert the Floppy Disk Copy Utility floppy in the floppy disk drive and press the B RESET button the front panel of the workstation. Press the F2 Function key/boot icon to boot the Utility floppy.You will be prompted with the following: What class of user do you belong to? 1 - I Am A Normal User 1 - I Am A System Administrator 1 - I Am From Technical Support Please enter Selection: Select choice 1. The next menu will look like this: Floppy Duplication and Verification Facility 1 - Diskette Copy and Checksum Utility 2 - Go To Previous Menu Please Enter Selection: Select Choice 1. The menu will be expanded and present you with four options: 1 - Read Master 2 - Make Copy 3 - Calculate Checksum 4 - Quit To make a copy, select choice 1. You will be prompted to insert the source floppy into the floppy drive. When the source floppy has been read into the machine, a short beep will occur. You should then select choice 2 to write out the image retained in the machine onto the destination floppy. You will be prompted to insert the destination floppy into the floppy drive. You may calculate the checksum of any floppy by selecting choice 3 from the menu. This value is useful when compared with the checksum of a copied floppy, because each copy should have the same checksum value as the original. If the checksums differ, you can assume something is wrong with the copied floppy diskette. When you wish to exit the Floppy Disk Copy Utility, select choice 4 - Quit, to return to the menu entitled Floppy Duplication and Verification Facility; from here select choice 2 - Go To Previous Menu. You will be asked to confirm this choice: Test data will be deleted upon exit. Is this OK? Answer Y to exit. 2 RS232 Support 1 Cable Configurations for RS232C Port and TTY Port 1 There are two ports on the Xerox 1186 capable of supporting RS232 communications: the TTY Port (which is standard equipment) , and the RS232C port on the IOP board, labeled C4. Both ports are standard. and exit the machine chassis in female 25-pin D-shell connectors. The RS232 port will be labeled Comm/DTE for its associated connector. The TTY Port will be labeled Printer/DCE. Looking at the RS232C port from the end of the extension cable, it is a standard RS232C configuration for DTE devices (DTE means "Data Terminal Equipment"; the word "terminal" should not invoke the image of a workstation, but rather the terminus of a logical circuit). A DTE device is supposed to terminate in a male connector. The RS232 port is intended to be connected to a modem or mainframe computer. A female connector generally implies a DCE configuration (DCE means "Data Communications Equipment"), but many manufacturers of RS232C interfaced devices do not consistently obey this convention. Thus it is occasionally necessary to wire an adaptor cable of some kind, and there is much latitude in configuring it. In the normal case, such as using an off-the-shelf modem, the connector on the device will be female, and present a DCE interface. The TTY port is intended to be used with a printer. In order to connect two DTE devices, it is necessary to use an adaptor cable which has female connectors on each end; this kind of adaptor is called a "null modem", because it permits the two DTE devices to plug into what they may view as a DCE interface-- a modem. It consists of two 25-pin, Female D-shell connectors on a moderate length of cable, and is wired as follows: pin 1 to pin 1 pin 2 to pin 3 pin 3 to pin 2 pin 4 to pin 5 pin 5 to pin 4 pin 6 to pin 20 pin 7 to pin 7 pin 20 to pin 6 This cable is symmetric, i.e. identical, at both ends. Connecting 1108 and 1185/1186 Processors with RS232 1 The 1185 and 1186 processors may be connected to each other or to 1108 processors by means of their RS232 or TTY ports. There are three possible connection strategies, depending on which of the two ports on each machine are connected. RS232 Port to RS232 Port A special cable must be constructed to connect an 1185 or 1186 processor's RS232 port to another (1186, 1185, or 1186) processor's RS232 port. The cable must terminate in 25-pin, male D-shell connectors, and must be wired as follows: pin 1 to pin1 pin 2 to pin 3 pin 3 to pin 2 pins 4, 5 to pin 8 pin 6 to pin 20 pin 7 to pin 7 pin 8 to pins 4, 5 pin 20 to pin 6 This cable is symmetric; either end may be plugged into either processor. RS232 Port to TTY Port No special wiring is needed to connect the 1185 or 1186 processor's RS232 port to another processor's TTY port. Follow the instructions in the following section for connecting an 1185 or 1186 processor to a modem or mainframe computer. TTY Port to TTY Port The same cable described above to connect RS232 ports together may be used to connect TTY ports together. However, a simpler cable, meant to connect an Epson printer to the RS232 port, may also be used. This cable is described in a following section. Connecting Printers to the Xerox 1186 1 Epson FX-80 to Xerox 1186 To connect an 1186 workstation to an Epson FX-80 printer, you may use a standard, unaltered 25-pin, D-shell male-to-male cable, for use from the TTY Port only. To connect to an Epson FX-80 from the RS232C port, you must use an altered 25-pin, D-shell male-to-male connector. pin 1 to pin 1 pin 2 to pin 3 pin 3 to pin 2 pin 4 to pin 5 pin 5 to pin 4 pin 6 to pin 20 pin 7 to pin 7 pin 20 to pin 6 This cable is symmetric at both ends. It will plug directly into the Comm/DTE connector (rather than into the end of the standard adaptor cable). You may also use a female connector on one end, and thus have a non-symmetric cable which will plug into the end of the standard adaptor cable; this may be more useful if it is difficult to reach the back of the machine. 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