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README-Comet3.0
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Comet 3.0, The Cornell Macintosh Terminal Emulator
Comet 3.0B3 is the latest version of Comet, available from
ftp.cit.cornell.edu in the /pub/mac/comm/test directory. Comet, the
Cornell Macintosh Terminal Emulator, may be freely used as long as
the restrictions in the copyright notice in the "About Comet..."
menu item are observed.
UPGRADE/INSTALLATION NOTE: To ensure that keyboard mapping works
correctly, you need to copy the "Comet keyboard-No Diacritics"
keyboard layout into your System. This resource has changed in
order to avoid a bug which sometimes occurs when Comet is used in
conjunction with Word and Excel.
Comet is a full-featured Macintosh Terminal Emulator offering up to
16 windows with fast color emulations of the Heath H19, Digital
VT102, or IBM 3278-{2,3,4,5} in 9, 12, 16, 24, and 36 point font
sizes. Serial and MacTCP connections are supported (3270 emulation is
available over MacTCP only; a similar ASCII interface is supported with
a Heath-19 terminal emulation through the IBM 7171). As of yet the
Comm Toolbox is not supported.
Comet uses Macintosh documents to store configuration information on
each session. Each Comet terminal session has an a scrollback buffer
with scrollbars on the emulator window and an associated TextEdit window,
the ".edit window," which can be used to edit text (which can be made
upload/download target window with automatic line wrapping/unwrapping),
to compose and execute macros, and to log session data (as an
alternative to using the scrollback buffer). A Find command allows you
to search either the .edit window or the scrollback buffer. Print,
Copy, and Paste are supported; Comet also supports session logging to
disk.
Comet supports macros and macro recording. A macro can be associated
with a key or a mouse double click; Comet can execute a macro when a
connection is opened or closed to allow automatic access to
Telnet servers. Key macros may be up to 10K in length; the scripting
language offers a match-string function to wait for host output so that
macros can execute reliably.
On-line documentation can be viewed and searched using a .edit
window. Note especially that many functions in Comet are available
only as key macro settings, e.g., disabling cursor positioning for
the ASCII terminals. Configuring these options in a Connection macro
will allow you to permanently configure one of these options for
a session.
File transfer support is somewhat limited, including a locally
developed IBM mainframe protocol for serial and network connections
(ft3270) and a TFTP server for users connected to a TCP/IP network.
Serial transfer for ASCII emulators is not supported. Comet supports
automatic local printing of downloaded files with special name
extensions (e.g., ".print").
Comet functions with standard UNIX vt102 termcaps (an "stty rows nn
columns nn" in your .login is needed to reconfigure the screen size) and
performs well with VMS on Digital mainframes also. VT100 windows can be
up to 32K in total text area, e.g., 100 rows X 320 columns.
The IBM emulations specifically support the extended character set
used by the NOTIS library card catalog system; Comet supports printing
of this character set when the Comet-fonts are installed in the Fonts
folder. A Comet document which maps the keyboard to be nearly
identical to an IBM 3163 with the ALA character set option is included
in the CometExternal distribution.
The most current version of Comet is available on ftp.cit.cornell.edu
in the directory "/pub/mac/comm/"; the complete Comet package,
including documentation and the IBM host file transfer and 7171 support
files, is available in "/pub/mac/comm/cometExternal/". The most
current development version is available in "/pub/mac/comm/test/".
If you find a bug in Comet, please send a bug report to
comet-bugs@nmc.cit.cornell.edu
using the Bug Report form in Comet's Apple menu. You can send comments
or requests to
comet-comments@nmc.cit.cornell.edu.