[Simh] HP2100 simulator release 28

[J. David Bryan]

The 28th release of the HP 2100 simulator is now available from the 
Computer History Simulation Project (SIMH) site:  

  https://github.com/simh/simh

This release changes the implementation of the Processor Interconnect Kit 
(IPL device) from network sockets to shared memory, improving the 
performance of the dual-CPU HP 2000 Time-Shared BASIC operating systems.  
New process synchronization commands also have been added to improve the 
reliability of the 2000F and 2000 Access system startup on multi-core host 
machines.

In addition, the BOOT command now installs the correct binary loader for 
the CPU model, e.g., BOOT PTR installs and runs the Basic Binary Loader 
(BBL) if the CPU is configured as a 2114/15/16 or 2100, or the 12992K Paper 
Tape Loader ROM if the CPU is configured as a 1000 M/E/F-Series.  The LOAD 
command has been extended to permit copying of internal device boot loaders 
into memory.

The full set of new features is listed in the release notes that accompany
the simulator source files.  In addition, an updated HP 2100 Simulator
User's Guide that covers the new commands is provided in Microsoft Word
format with the source download and also as a PDF file at:

  http://alum.mit.edu/www/jdbryan/hp2100_doc.pdf

New HP 2000 E/F/Access software kits that employ the new shared memory link 
and process synchronization commands are available here:

  http://simh.trailing-edge.com/software.html

The kits include preconfigured disc images as well as the software and 
command files necessary to generate new system configurations.

                                      -- Dave