RFC398

NWG/RFC #398 John R. Pickens UCSB Online Graphics Edward D. Faeh NIC 11911 UCSB

                                                22 Sept 72

At present, users with TEKTRONIX or IMLAC terminals or with systems that support the proposed level 0 graphics protocol can access UCSB graphics. Listed below are the ICP sockets for the currently supported terminals and protocols. Any detailed questions about or problems with a particular protocol should be directed to Ed Faeh (805-961-4047).

Socket Supports

x'701' IMLAC with special software designed

                    by Jerry Powell (MITRE Corp.).
                    Graphics is sent over a simplex
                    connection to the IMLAC.  Alphanumerics
                    are sent over a TELNET-like connection
                    to a separate device.  The IMLAC
                    software can be loaded from MIT-DMCG.

x'703' IMLAC with 80x80 display grid

                    and Standard Text and Edit Package.
                    Some IMLACs have a 64x64 display grid.
                    Therefore, the choice may be made in
                    the near future to format the
                    graphics output from this connection
                    for the smaller grid resolution so
                    that both terminal types may be handled.
                    Display resolution is limited with
                    this terminal configuration as
                    normal UCSB terminals have 1024x1024
                    grid.  Nevertheless, meaningful
                    displays are obtained even at the
                    lower resolutions.

x'705' Current Level 0 graphics protocol.

x'707' Same as x'701' but with special

                    UCSB online keyboard as input.
                    This configuration averts the
                    necessity of spelling out online
                    operators.

x'709' Same as x'705' but with special

                    UCSB online keyboard as input.

NWG/RFC# 398 JRP EDF 22-SEP-72 16:25 11911 UCSB OnLine Graphics

x'801' TEKTRONIX terminals. Models 4002-A

                    4010, and T-4002 have been tested
                    successfully.  Presumably all other
                    4002 compatible terminals will also work.

The primary problems that will be encountered by the network user center about display formatting. For historical reasons (i.e. only one type of terminal in house ) no means were included in the system to facilitate terminal independent random positioning of alphanumeric output. Thus, a program which draws and labels a graph neatly on one terminal might label like a kindergartener on other terminals. Nevertheless, this problem can be minimized with careful programming and efforts are underway to provide at least minimal alphanumeric device independence.

Users interested in experimenting with online graphics should contact John Pickens (805-961-3454), Glen Davis (805-961-2462), or Mark Krilonovich (805-961-3454). Suggestions and criticisms of all aspects of the UCSB OnLine - Network User interface are desired.

   [ This RFC was put into machine readable form for entry ]
   [ into the online RFC archives by BBN Corp. under the   ]
   [ direction of Alex McKenzie.                      1/97 ]