// v1.0b - 12 Jul 2005 - donorth - Initial rewrite
// v1.1b - 20 Feb 2006 - donorth - Fixed RT11 f/s init; added XXDP f/s init
// v1.2b - 25 Feb 2006 - donorth - Updated -p arg to be number or string
// - Fixed some typos in help string
// v1.3b - 28 Feb 2006 - donorth - Updated windoze serial line config
// v1.4b - 25 May 2006 - donorth - Send INITs on initialization/restart
// v1.4c - 25 Nov 2007 - donorth - Make <INIT><INIT> message be debug, not verbose
// - Fix fileseek() to correctly detect LEOF
// - read/write no longer skip past LEOF
// v1.4d - 10 Feb 2008 - donorth - added XRSP switch for packet-level handshake
// v1.4e - 16 Feb 2008 - donorth - changed to --long switches from -s
// - Slightly updated RT-11 disk init bits
// - Added --nosync switch
// v1.4f - 02 Jan 2012 - donorth - Restructuring for ultimate inclusion
// of a tu58 controller implementation
// (ie, to hook to a real tu58 drive or the emulator)
// v1.4g - 30 Oct 2013 - donorth - Removed XRSP switch
// v1.4h - 03 Nov 2013 - donorth - Added packet timing computation in debug mode
// v1.4i - 14 Nov 2013 - donorth - Disabled devtxflush() in wait4cont() routine
// to fix USB output (PC to device) thruput and
// allow 64B USB packets to be used
// v1.4j - 01 Nov 2014 - donorth - Change 'int' to 'long' where possible.
// Only use char/short/long types, not int.
// Fix source for ubuntu linux 12.04 (time structs)
// v1.4k - 11 Jun 2015 - donorth - Integrate Mark Blair's changes for MacOSX compilation
// - No functionality changes on other platforms
// v1.4m - 23 Feb 2016 - donorth - Added M. Blair's vax console timeout changes for '730
// - Added M. Blair's background mode option (no status).
// v1.4n - 06 Apr 2016 - donorth - Added capability for baud rates >230K, up to 3M
// v1.4o - 09 Jan 2017 - donorth - Removed baud rate 256000, it is nonstandard for unix
// Changed serial setup to use cfsetispeed()/cfsetospeed()
// Added capability for 1 or 2 stop bits; default is 1
