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支持X/YModem和cis_b+协议的串口通讯程序

    Send \r, not \n, after the Byeptr (Al Bolduc)
    When diverting from a script, pace by reading modem one line at a time
    Combined capture/captflag, and cf/cfp

Version 3.0b Radley 08 Jul 1991
    Eliminated mklow/mkhigh in favor of tolower/toupper
    Shortened inter-line delay in script transmittal

Version 3.0a Radley 29 Jun 1991
    Bugs re DIDO ports logic
    Spelling errors in xc.nro
    Added Buck-type CIS macros to .exrc

Version 3.0 Radley    06 Jun 1991
    Program name XC replace XCMALT, by Jean-Pierre Radley

    Ditched nap() in favor of times()
    Cleaned up error handling in xcscrpt.c
    Used NULLS and NULLF where appropriate
    Used same crc table for xmodem and B+ (Mike Barton)
    Increased size of f[] in xcdial.c (Tom Cattrall)
    Introduced XC_PATH (Dan Everhart)
    Won't mistake a directory for a script (clue from Bob Stockler)
    Added "hangup" script keyword (Dan Everhart)
    Forced 8N1 setting on opening port (clue from John James & Russ Ranshaw)
    Cleaned up manual page
    Included 38400 speed
    Deleted ioctl(TCFLSH) from s_exit() (David Kindred)
    Fixed spurious return to dialing directory after B_Transfer (David Kindred)
    Fixed auto toggle after dialing without a script (clue from Roger Chaplin)
    Use carat-char for a ctrl-char in waitfor as well as in transmit
    Added MY_ESC-Q to quit XC from terminal mode (clue from Bill Hobson)


    X C M A L T  R E V I S I O N  H I S T O R Y


Version 2.9 Radley 02 Sep 1990
    Fixed error messages and file opening in xcb+.c when permission denied.

Version 2.8 Radley 01 Sep 1990
    Fixed interrupt handling when dialing from phonelist (clue from Jim Asman)
    Merged xcparse.c into xcscrpt.c
    Fixed backspace handling in getline()
    Used getline() inside man_dial()
    Did away with using /dev/tty
    For cron: do not bother with TERM if !isatty()
    Fixed page counting in dial directory routines (clue from Mike Squires)
    Changed Msg[80] to Msg[SM_BUFF] (clue from Dave Cardinal )
    Fixed a bad tgetstr() call (clue from Per Bilse)

Version 2.7 Radley 12 June 1990
    Merge install.doc into xcmalt.h and README
    Change xcmalt.doc to nroff source
    Add cr_add flag to insert [or not] CRs after NLs in B+ uploads

Version 2.6.1 Betz, Cattrall, Roberts, Scothorne, Radley 13 May 90
    Use separate rxbuf and kbbuf for port/keyboard input (Tom Cattrall)
    Stretched some sleep and nap delays (Doug Scothorne)
    Removed '/' from INSDIR definition in Makefile (Tom Betz)
    Fixed bug in while/do/call script/done logic (clue from Tom Roberts)
    Removed dd_done variable
    Fixed terminal(todir) logic

Version 2.6 Radley 29 April 1990
    Reinstated SCO 2.2 ungetty calls
    Deleted crc setting, xmodem now always done with CRC
    Added auto flag, automatically start capture on entering terminal mode
    Used tputs() for screen control strings.

Version 2.5 George Pontis & Jean-Pierre Radley 19 April 1990
    Use ioctl.h only for the T6000
    Fixed calls to nap() for BSD
    Fixed statbuf() declaration bug in xcport.c
    Included mklow()/mkhigh() as frontends to tolower()/toupper()
    Included NOSHELL option
    Exits mopen() if no port specified

Version 2.4 Radley    31 Mar 1990
    Made all identifiers unique in first seven characters.
    Replaced incorrect references to "baud" and "baud-rate" by
     "bps" and "bits/second"

Version 2.3 Radley 19 Feb 1990
    B-Plus replaces Quick-B
    Reinstated xclog code
    No mungmode variable; overwriting of a file interactively confirmed.
    No term variable; all transfers return to Terminal mode.
    Added timer.c, to calibrate the built-in nap() code.

Version 2.2 Radley 05 Jan 1990
    Removed XCLUDE termio setting, which locked port on first fopen()
    Change setuid to be uid of 'uucp'
    Fixed set/get/uid routines
    Revised menu display
    Removed xclog code from xccisb.c
    Changed many TCSETAW ioctl calls to TCSETA

Version 2.1 Radley  12 Dec 1989
    Revised all inverse video displays
    Took out more unnecessary routines
    Permitted operation from 'cron' or 'at'
    Fixed some of the interrupt routines
    Removed PUT_TAKE manifest, code for put/take now always included
    Fixed some of the mopen() routines.
    Did away with DRIBBLE, use nap() instead

Version 2.0 Radley 9 Aug 1989
    Added openfile routine (credit to George Pontis)
    Added LIBDIR (credit to George Pontis)
    Used setbuf on local tty (credit to George Pontis)
    Eliminated fflush() calls
    Fixed put and take code
    Deleted SCO 2.2 ungetty stuff

Version 1.0 ...all in or about, oh, say, 1988.
    CD-independent modem opening added by Fred Buck/J-P Radley
    Broken shell-escape mechanism fixed by Fred Buck
    Tandy 6000 LCKfile support added by Fred Buck
    Flexible LCKfile support added by Steve Manes
    Same, for SCO 2.2, added by J-P Radley
    Fullscreen dialing directory added by Steve Manes
    Fullscreen dialing directory tuned by Fred Buck/J-P Radley
    Shell-escape ignore-SIGINT bug fixed by Fred Buck
    Command-mode ignore-xon/xoff bug fixed by Fred Buck
    Script parsing greatly extended by Fred Buck
    "BYE" sequence to modem on exit added by Fred Buck

    Program named XCMALT instead of XCOMM, by Fred Buck


    X C O M M  R E V I S I O N  H I S T O R Y


Version 2.2    larry gensch 14 Dec 87 Major code restructure
    Reduced program and command options
    Added SET command for setting various parameters
    Added HANGUP command for disconnecting modem
    Modified xccisb.c code to support CIS "Quick B" Protocol
    Added xcscrpt.c code for processing script files
    Added SCRIPT= parameter to phonebook processing (auto-logon scripts)
    Added CIS parameter for CIS <ENQ> auto transfers
    Added NL parameter for newline translation
    Added HANGUP command from terminal mode
    Added SCRIPT command from terminal mode

Version 2.1b    larry gensch 11 Nov 87 Bug Fix release
    (no bugs in the code, just some portability fixes)
    Changed "sigset" in xccisb to "signal"
    Removed #include <setjmp.h> from xcxmdm

Version 2.1a    larry gensch 28 Oct 87 General Update
    Added CIS "B" Protocol (c, ct commands)
    Added BAUD= & BITS= parameters to phonelist file.
    Switched some command letters
    Revised command line parsing to use getopt()

Version 2.0    larry gensch 19 Oct 87 Revisions for System V.3
    Changed <sgtty> references to <termio> (modified ioctl(2) calls)
    Changed terminal mode function keys to <ESC> sequences; added getconchr()

Version 1.1    Eric E Coe 21 Jul 85
    Autodial for Hayes-compatible modem.
    General rearranging of the code

Version 1.0    Eric E Coe 12 Apr 85
    Program created


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Note: in the original XCOMM file "install.doc", Larry Gensch gave his
various mail addresses for users to reach him about bug reports, upgrade
requests, and the like. But Larry doesn't support (or in fact have anything
to do with) XC/XCMALT, except as a contributor, and the fact that
XCMALT is based on XCOMM 2.2, so there's no point in including this
information here. 
Fred Buck, who made the major changes from XCOMM to XCMALT, passed away in
early 1989.
Jean-Pierre Radley has since been shepherding the program as it evolved from
XCMALT to XC.

Gripes, bugs, and comments accepted by:
    Jean-Pierre Radley
      [e-mail]
      [e-mail]