What's new in Hercules

What's new in release 4.00 (Hyperion)

Release date: Not yet determined. Find the current release candidate here (opens a new page).

• Improved Telnet support that works with many standard clients. Details here (Fish (David B. Trout))
• BRCTH, SSKE, STFL, STIDP, TRACE/TRACG, PFMF, PTF instruction fixes (Jan Jaeger, Mark Gaubatz, John P. Hartmann, Roger Bowler)
• Improved CMPSC instruction implementation including CMPSC-Enhancement Facility support (Fish (David B. Trout))
• Binary Floating-Point instructions now use John Hauser's IEEE-754 'softfloat' implementation (Fish (David B. Trout))
• Driver for MPCPTP and/or MPCPTP6 devices (Ian Shorter)
• QDIO/OSA support (Jan Jaeger, Harold Grovesteen, Ian Shorter, Fish (David B. Trout))
• New CTCE driver providing "BCTC" support for Hercules SYSPLEX'ing via GRS (Peter J. Jansen)
• IBM 3791 support (Max. H. Park)
• Pre-configured tun device support (John P. Hartmann)
• LCS zero MAC address fix (Fish (David B. Trout))
• TCP_NODELAY and 3270 binary xfer IAC bug fix (Dr. Hans-Walter Latz)
• Fix dasd PSF PRSD suborder 03 bug (Florian Bilek)
• Increase dasdload ipl2 read command length to 32K (Laddie Hanus)
• Various DASD utilities fixes and enhancements (Kevin Leonard)
• 3390 mod 54 fix (Jan Jaeger)
• 3990-3 LRE and VSAM Extended Format Dataset fix (Fish (David B. Trout))
• Prevent duplicate EQID (Gordon Bonorchis)
• FIX async comm lines bug impacting VM/ESA 1.5 (David Durgee)
• I/O subsystem enhanced to more closely comply to architecture (Mark Gaubatz)
• Support for large tape block sizes up to 2 MB (Fish (David B. Trout))
• Enhanced timer resolution (Mark Gaubatz, Fish (David B. Trout))
• Integrated REXX support (Jan Jaeger, Enrico Sorichetti)
• Selective enablement of architecural features (Jan Jaeger)
• Message restructure (Bernard van der Helm, Paul Gorlinsky)
• Allow regex replacement variables in HAO commands (Roger Bowler)
• Hercules build quality assurance (Fish (David B. Trout) per Mark Gaubatz)
• Report individual CPU percentages to external GUI (Fish (David B. Trout))
• VS2012 and VS2013 support (RobiOneKenobi)

What's new in release 3.11

Release date: 15 September 2014

• Floating-Point-Extension Facility (Roger Bowler)
• Enhanced Channel-to-Channel Adapter via TCP/IP (Peter J. Jansen)
• Load/Store-on-Condition Facility corrections (Neale Ferguson)
• LCS corrections (Paul Gorlinsky, David "Fish" Trout, Ivan Warren)
• Floating-Point-Extension Facility corrections (Neale Ferguson)
• CMPSC corrections (Bernard van der Helm)
• Load sequential datasets from XMIT files (Roger Bowler)
• Eliminate compiler warnings for Linux and Mac (Roger Bowler)

Download hercules-3.11.tar.gz

What's new in release 3.10

Release date: 1 February 2014

• Fix incorrect PSW IA in SIE mode with PER (Ian Worthington)
• Corrections to build procedures (Mike Frysinger, Dan Horak)
• Fixes for Mac OS X (Butch Anton, Adam Vandenberg, Enrico Sorichetti)
• Configuration topology facility fixes (Paolo Giacobbis)
• Convert BFP instructions to use SoftFloat package (Roger Bowler)
• Preliminary support for 2GB page frames (Roger Bowler)
• PFMF fixes (John P. Hartmann)
• CMPSC corrections (Bernard van der Helm)
• dasdls enhancements (Chris Cheney)

Download:   hercules-3.10.tar.gz

What's new in release 3.09

Release date: 15 July 2013

• Allow regex replacement variables in HAO commands (Roger Bowler)
• Prevent duplicate EQID (Gordon Bonorchis)
• Permit concurrent read access to printer and punch files (Roger Bowler)
• DFP zoned-conversion facility (Roger Bowler)
• Execution-hint facility (Roger Bowler)
• Miscellaneous-instruction-extensions facility (Roger Bowler)
• Load-and-trap facility (Roger Bowler)
• Fix for VSAM Extended Format (David "Fish" Trout)
• APL\360 2741 patch (Max H. Parke)
• Fix interval timer repeating interrupt (Ivan Warren, Kevin Leonard)
• Corrections to build procedures (Mike Frysinger, Dan Horak)
• Miscellaneous bug fixes (Roger Bowler)

Download:   hercules-3.09.tar.gz

What's new in release 3.08

Release date: 8 December 2012

• 1403 and 3211 FCB support (Enrico Sorichetti)
• Shutdown on SIGTERM (Frans Pop)
• Disable close-window button (Paul Gorlinsky)
• Allow larger IPL text (Laddie Hanus)
• Drop support for Cygwin, Win98, WinNT, Win2000 (Roger Bowler)
• Windows shutdown handlers (Paul Gorlinsky)
• Dynamically loadable instructions (Jan Jaeger)
• Additional codepages (Kevin Leonard)
• Load/Store-on-Condition Facility (Roger Bowler)
• Distinct-Operands Facility (Roger Bowler)
• Population-Count Facility (Roger Bowler)
• High-Word Facility (Roger Bowler)
• Message Security Assist Extensions 3 and 4 (Bernard van der Helm)
• Interlocked-Access Facility (Roger Bowler)
• CMPSC-Enhancement Facility (Bernard van der Helm)
• Fast-BCR-Serialization Facility (Roger Bowler)
• Reset-Reference-Bits-Multiple Facility (Jan Jaeger)
• Access-Exception-Fetch/Store-Indication Facility (Roger Bowler)
• Enhanced-Monitor Facility (Jan Jaeger)
• Load-Program-Parameter Facility (Paul Gorlinsky)
• IPTE-Range Facility (Jan Jaeger)
• Enhanced-DAT Facility (Jan Jaeger)
• Increase CKD_MAXFILES from 4 to 27 for 3390-27 and -54 (Paul Gorlinsky)
• CKD read attention message command (Florian Bilek)
• Support 128 CPUs on 64-bit Linux (Jan Jaeger)
• Issue Hercules commands via HTTP (Robert Hodge)
• Compression performance enhancements (Bernard van der Helm)
• Compression bug fixes (Bernard van der Helm, John P. Hartmann)
• Crypto bug fixes (Bernard van der Helm)
• Hexadecimal floating-point bug fixes (Andy Polyakov)
• SCSI tape enhancements and bug fixes (David "Fish" Trout)
• 3420 sense code corrections for MTS (Harold Grovesteen)
• Prevent multiple instances opening same output file under Windows (David "Fish" Trout)
• 2703 and 3705 fixes and 3791 support (Max H. Parke, Juergen Winkelmann)
• Enable GUI support as default for all platforms (Jacob Dekel)
• Miscellaneous bug fixes (Paul Gorlinsky, Ivan Warren, David "Fish" Trout, Jan Jaeger, Bernard van der Helm, Roger Bowler, Kevin Leonard, Ian Shorter, John P. Hartmann)

Download:   hercules-3.08.tar.gz

What's new in release 3.07

Release date: 10 March 2010

• Fast Synchronous Data Mover Facility (Guy Desbiens)
• Diagnose 210, 250, 260 (Harold Grovesteen)
• Extended Diagnose 204 feature (Jan Jaeger)
• Complete Diagnose 24 (Harold Grovesteen)
• Configuration-Topology Facility (Fish)
• HFP-Unnormalized-Extensions Facility (Harold Grovesteen)
• CMPSC performance improvements (Bernard van der Helm)
• uptime command (Fish)
• Raise XPNDSIZE limit to 1048576MB (Roger Bowler)
• MAXCPU and LPARNUM configuration statements (Roger Bowler)
• Add capacity model identifiers to MODEL config statement (Roger Bowler)
• SCLPROOT configuration statement (Jan Jaeger)
• Add "noclear" option to printer and card punch devices (Jay Maynard)
• Socket printer support (Fish)
• 3705 SNA device support (Max H. Parke)
• TTY and 2741 support for 2703 (Max H. Parke)
• Tracing enhancements (Jan Jaeger)
• Allow configure --enable-external-gui for Unix builds
• Enable tun/tap emulation for 64-bit Windows builds (Ivan Warren)
• 64-bit Windows support (Roger Bowler)
• Raise MAX_CPU_ENGINES limit to 64 (Roger Bowler, Ivan Warren)
• Numerous bug fixes (Ivan Warren, Fish, Jan Jaeger, Bernard van der Helm, Roger Bowler, Jay Maynard)

Download:   hercules-3.07.tar.gz

What's new in release 3.06

Release date: 11 January 2009

• Integrated 3270 (SYSG) console support (Roger Bowler, Jan Jaeger)
• HMC DVD-RAM read/write support (Jan Jaeger)
• 64-bit native version now supported on Mac OS X (Jay Maynard)
• Ability to specify IFL, zIIP, and zAAP engine types (Roger Bowler, Jan Jaeger, Ivan Warren)
• Console-like message handling (David "Fish" Trout, Bernard van der Helm)
• Tape automount CCW support (David "Fish" Trout)
• CKD Locate Record Extended CCW (Greg Smith)
• Support for FLEX-ES FakeTape tape images (David "Fish" Trout; FLEX-ES and FakeTape are trademarks of Fundamental Software, Inc.)
• More complete 3490 and 3590 tape support (David "Fish" Trout)
• Solaris build support (Jeff Savit)
• FreeBSD build support (Bjoern A. Zeeb)
• Panel enhancements:
  • Display virtual storage in primary, secondary, and home space (Paul Leisy)
  • Display and modify PSW fields by panel command (Roger Bowler)
  • Modify control registers by panel command (Roger Bowler)
  • Specify IPL parameter by PARM operand (Ivan Warren)
  • New panel commands: automount, cmdtgt, ctc, herc, msghld, pscp, scp, sfk (David "Fish" Trout, Bernard van der Helm)
• LEGACYSENSEID configuration statement (Ivan Warren)
• New instruction feature support (introduced with System z10):
  • Parsing-Enhancement Facility (Bernard van der Helm)
  • Message-Security-Assist Extension 2 (Bernard van der Helm)
  • General-Instructions-Extension Facility (Roger Bowler, Jan Jaeger)
  • Execute-Extensions Facility (Bernard van der Helm)
  • Move-with-Optional-Specifications Facility (Roger Bowler)
  • Compare-and-Swap-and-Store Facility 2 (Ivan Warren)
• Many emulation fixes (Roger Bowler, Jan Jaeger, Ivan Warren, David "Fish" Trout, Greg Smith, Paul Leisy, Jay Maynard, Bernard van der Helm, Kevin Leonard, Tony Harminc)

Download:   hercules-3.06.tar.gz

What's new in release 3.05

Release date: 23 June 2007

• Prebuilt Cygwin binary no longer supplied; building Cygwin version from source still supported (Jay Maynard)
• New system features: Compare-and-Swap-and-Store, Conditional SSKE, Decimal Floating Point, Floating Point Support Enhancement (Roger Bowler)
• Extract CPU Time Facility (Jan Jaeger)
• Multiple Logical Channel Subsystems Facility (Jan Jaeger, Ivan Warren)
• 3590 tape support (David "Fish" Trout)
• 3990-6 control unit and ECKD support (Greg Smith)
• Many performance improvements (Greg Smith, Ivan Warren, Jan Jaeger)
• Many emulation fixes (Greg Smith, Roger Bowler, Ivan Warren, David "Fish" Trout, Kevin Leonard, Peter Coghlan)
• Major SCSI tape fixes (David "Fish" Trout)
• Added floating point instructions CGER, CGDR and CGXR (Bernard van der Helm)
• Address range options for instruction trace and step (Greg Smith)
• Update gpr registers via panel command (David "Fish" Trout)
• Console connection keepalive (David "Fish" Trout)
• Customizable 3270 connection screen (Ivan Warren)
• dasdconv quiet and stdin options (Roger Bowler)
• Hercules Automatic Operator (Bernard van der Helm, David "Fish" Trout)
• Enhanced symbol substitution (Leland Lucius, Enrico Sorichetti, David "Fish" Trout)
• Miscellaneous new panel commands: qd (Greg Smith), fpc, traceopt (Roger Bowler), logopt (Kevin Leonard), cd, pwd, timerint, defsym (David "Fish" Trout)

Download:   hercules-3.05.tar.gz

What's new in release 3.04.1

Release date: 25 March 2006

• Fix to allow building for Intel-based Mac OS X (Jay Maynard)
  Note: This version only applies to the Mac OS X 10.4 (Tiger) platform. Version 3.04 is current for all other platforms.

Download:   hercules-3.04.1.tar.gz

What's new in release 3.04

Release date: 24 February 2006

• CCKD garbage collection fix (Greg Smith)
• Reworked timing functions (Jan Jaeger)
• Codepage 1047 conversion tables (Kevin Leonard)
• Fixed off-by-one-day bug with SYSEPOCH other than 1900; added new config parameter, YROFFSET, and added warning if SYSEPOCH is not 1900 or 1960 (Jay Maynard, Jan Jaeger)
• New 2305 CKD disk emulation (Jay Maynard)
• Added floating point instructions CEGR, CDGR and CXGR (Bernard van der Helm)
• Added support for cgi-bin dynamic modules (David "Fish" Trout)
• Instruction fixes: PLO, CVB, CXFBR, CXGBR (Bernard van der Helm, David "Fish" Trout, Greg Smith, Pasi Pirhonen)
• Fix for Windows ..\relative path dasd files (David "Fish" Trout)

Download:   hercules-3.04.tar.gz

What's new in release 3.03.1

Release date: 30 December 2005

• Fix translation exception bug that was causing some Linux kernels to panic (Fabrizio Calabretta, Greg Smith, Ivan Warren)
• TOD Clock-Steering Facility (Jan Jaeger, Bernard van der Helm)
• Fix bug in shadow file filename processing on native Windows (David "Fish" Trout)
• Performance improvements in TM instruction family (Bernard van der Helm)
• Support for Linux zipl LOADPARM of PROMPT (Jan Jaeger)

Download:   hercules-3.03.1.tar.gz

What's new in release 3.03

Release date: 20 December 2005

• Native Windows version no longer requires Cygwin (David "Fish" Trout, Roger Bowler, Ivan Warren)
• SMP host integrity fixes (Greg Smith, David "Fish" Trout, Bob Deblier)
• ALS5, z9 and other architectural enhancements (Roger Bowler, Bernard van der Helm, Jan Jaeger, David "Fish" Trout)
• Restructured cryptographic support no longer depends on libgcrypt (Bernard van der Helm, Roger Bowler, Ivan Warren)
• Support emulation of up to 32 CPUs; maximum without special build options now 8 (Ivan Warren)
• Enhanced semigraphical control panel now uses all of larger console windows (Greg Smith, David "Fish" Trout)
• Many emulation fixes (Roger Bowler, Jan Jaeger, Bernard van der Helm, David "Fish" Trout, Greg Smith, Ivan Warren, Andy Styles, John Decker)
• CMPSC fixes now produce identical results with real systems (Jacques Dilbert, Bernard van der Helm)
• Integrated 1052-C / 3215-C console support (Jan Jaeger)
• tapecopy support for writing as well as reading tapes (Jay Maynard)

Download:   hercules-3.03.tar.gz

What's new in release 3.02

Release date: 11 December 2004

• Significant performance improvements (Jan Jaeger, Greg Smith, Gabor Hoffer)
• SIE performance almost the same as native (Jan Jaeger, Gabor Hoffer)
• SCSI tape support in Windows (David "Fish" Trout)
• Mac OS X CTC networking support (Jay Maynard)
• Suspend/resume facility (Greg Smith)
• ASN-and-LX-Reuse Facility (Roger Bowler)
• Enable or disable ASN-and-LX-reuse in config (Jan Jaeger, Ivan Warren)
• Extended Translation Facility 3 (Bernard van der Helm)
• DAT-enhancement facility (Roger Bowler)
• Immediate CCWs now correctly handled when Suppress Incorrect Length Indication is specified (Ivan Warren)
• 3270 option provided to control connection to group of devices (Ivan Warren)
• 3270 connections can be limited by IP address (David "Fish" Trout)
• Remaining 26 binary floating point instructions (Roger Bowler)
• IPL CLear, System Reset, and System Reset Clear operator commands (Ivan Warren)
• Pentium 4 optimizations enabled in gcc (Ivan Warren)

Download:   hercules-3.02.tar.gz

What's new in release 3.01

Release date: 30 November 2003

• Bypass gcc 2.96 optimizer bug that caused incorrect instruction execution (Ivan Warren)
• Added command-line control panel command history (Martin Gasparovic, Volker Bandke)
• Message Security Assist (Bernard van der Helm, Jan Jaeger)
• Fixed device interrupt pending on IPL that caused OS/360 to have to be IPLed twice (David "Fish" Trout, Greg Smith)
• Added pthreads trace function for debugging (Greg Smith)
• Fish threads code rewritten, closer to POSIX thread functionality while still performing better (David "Fish" Trout)
• Fixed incompatibility with Windows NT telnet client (Greg Price, David "Fish" Trout)
• Performance and integrity enhancements for RS instructions (Greg Smith)

Download:   hercules-3.01.tar.gz

What's new in release 3.00

Release date: 2 October 2003

• Dynamically loaded module support for devices, instructions, and operator console panels (Jan Jaeger, David "Fish" Trout, Ivan Warren)
• Shared and remote DASD support (Greg Smith)
• z990 (ALS4) instruction support (Roger Bowler, Jan Jaeger, Bernard van der Helm)
• HFP Multiply-Add/Subtract Facility (Roger Bowler)
• Long Displacement Facility (Roger Bowler)
• Simplified network adapter specifications (David "Fish" Trout, Jim Pierson)
• New device emulations: 2703, 3410, 3490, 9347 (Ivan Warren)
• ECPS:VM support (Ivan Warren)
• Reworked process priority handling (Mark Gaubatz)
• Greatly improved interval timer resolution (Mark Gaubatz)
• Internal consistency checking improvvements (Greg Smith)
• Corrected 3270 session disconnect processing (Ivan Warren)
• Instruction disassembler in control panel (Jan Jaeger)
• Tape read backward fixes (Jay Jaeger)
• Fix for double memory consumption bug on Windows (Mark D., David "Fish" Trout)
• OMA tape processing fixes (Ivan Warren)
• Message logging restructuring (Jan Jaeger, David "Fish" Trout)
• S/370 I/O race condition fixes (Victor Shkamerda, Greg Smith)
• Manual pages for some commands (Jim Morrison)

Download:   hercules-3.00.tar.gz

What's new in release 2.17.1

Release date: 12 February 2003

• Corrected RPM installed files permissions (John Summerfield)
• Corrected dasdload verbosity level (Jay Maynard)
• Corrected card reader eof/intrq option handling, added * to designate no file loaded (Jay Maynard)
• Correct SLB instruction condition code (Jan Jaeger)
• Fix dasdutil.c track conversion function (Jim Morrison)

Download:   hercules-2.17.1.tar.gz

What's new in release 2.17

Release date: 1 February 2003

• Restructured DASD subsystem: better use of memory, compressed FBA support, framework for shared DASD (Greg Smith)
• New dasdcopy utility replaces ckd2cckd and cckd2ckd, and adds compressed FBA support (Greg Smith)
• Native support for Mac OS X 10.2 and above (Paul Scott)
• Reworked CTC and LCS emulation (Jim Pierson)
• SMP host integrity fixes (Greg Smith and Jan Jaeger)
• Fixes for compile errors with gcc 3.x (Greg Smith and David "Fish" Trout)
• S/370 dual address space and MVS assist fixes (Jan Jaeger)
• Renumbered all messages to consistent format, removed duplicate numbers, and began message documentation (Jay Maynard)
• Added options for 1052/3215 consoles and card readers (Jay Maynard)
• Numerous instruction and I/O emulation fixes (Greg Smith, Jan Jaeger, Juergen Dobrinski, Bernard van der Helm, Andy Norrie, and David "Fish" Trout)

Download:   hercules-2.17.tar.gz

What's new in release 2.16.5

Release date: 8 July 2002

• Correct serious CCKD image file corruption error (Greg Smith)
• Allow tape files to be opened for input if on CD-ROM (Volker Bandke)

Download:   hercules-2.16.5.tar.gz

What's new in release 2.16.4

Release date: 3 July 2002

• Read backward support for emulated tape (Volker Bandke)
• Added 9313, 9332, and 9335 to list of supported devices (Tomas Masek)

Download:   hercules-2.16.4.tar.gz

What's new in release 2.16.3

Release date: 2 July 2002

• CTC fix for TurboLinux bug (Jim Pierson)
• 3287 printer support via TN3270 (Tomas Masek)
• S/370 extended memory fixes (Tomas Masek)
• ctcadpt.c compilation fix for FreeBSD (Mark Szlaga)
• Fixed 3270 ERASE ALL UNPROTECTED command to not count data read (Tomas Fott)
• Fixes to ckdtab in dasdtab.c (Greg Smith)
• Retrofitted cckd chkdsk fixes/enhancements (Greg Smith)
• FBA fixes contributed by Tomas Masek (Greg Smith)
• Compatibility fixes for cckd and 2.17 (Greg Smith)

Download:   hercules-2.16.3.tar.gz

What's new in release 2.16.2

Release date: 20 May 2002

• Fixed 3350 dasdtab entry (Greg Smith)
• Fixed 370 interval timer error (Valery Pogonchenko)
• Control panel attach command bug fix (David "Fish" Trout)

Download:   hercules-2.16.2.tar.gz

What's new in release 2.16.1

Release date: 4 May 2002

• fthreads locking fixes (David "Fish" Trout)
• dasdload bug fix (Greg Smith)
• FBA dasd devices allow any size disk (Jay Maynard)
• Control panel attach command bug fix (Kris Van Hees)
• Windows versions (finally) accessible from main page (Jay Maynard)

Download:   hercules-2.16.1.tar.gz

What's new in release 2.16

Release date: 20 April 2002

• PER support (Jan Jaeger, Paul Leisy)
• S/370 multiprocessor support (Jan Jaeger)
• Licensed software restriction (Jan Jaeger, Jay Maynard)
• Performance mods (Gabor Hoffer, Juergen Dobrinski, Greg Smith, and Paul Leisy)
• Interrupt subclass priorities (Greg Smith)
• dasdcat program (Malcolm Beattie, Roger Bowler)
• Updated TCP/IP documentation (Roger Bowler)
• CTCI support for Windows (David "Fish" Trout)
• Print to unix pipe (Roger Bowler)
• Preliminary Lan Channel Station (LCS) support
• HTTP server (Jan Jaeger)
• Various fixes (as recorded in CHANGES) (Paul Leisy, Matt Zimmerman, Greg Smith, Volker Bandke, Bernard van der Helm, David "Fish" Trout)

Download:   hercules-2.16.tar.gz

What's new in release 2.15

Release date: 04 December 2001

• Autoconf added to ease portability (Matt Zimmerman, Fritz Elfert, Willem Konynenberg)
• Numerous instruction fixes (Paul Leisy)
• TUN/TAP support for Linux kernels beyond 2.4.6 (Matt Zimmerman)
• Timer fixes (Greg Smith)
• Synchronous I/O (Greg Smith)
• Support for IPL from CD-ROMs as with HMC (Jan Jaeger)
• CTC hang at shutdown fixed (Jan Jaeger)
• CTC TCP/IP now works with VM/ESA (Kris Van Hees)
• Compressed CKD endianness and RAS fixes (Greg Smith)
• Hot reader support (David "Fish" Trout)
• Machine checks now reported for host exceptions, loops, and wait states (Jan Jaeger)

Download:   hercules-2.15.tar.gz

(There was no release 2.14)

What's new in release 2.13

Release date: 05 July 2001

• Restrict TODEPOCH to 1900, 1928, 1960, 1970, or 1988, and correct offset calculation (Michael Koehne)
• HET unmount option (Michael Koehne)
• quiet command (Michael Koehne)
• Panel instruction disassembly (Jan Jaeger)
• CMPSC corrections (Bernard van der Helm)
• CTCT CTC over TCP/IP (Vic Cross)
• Sundry instruction and channel fixes (Jan Jaeger)
• Numerous instruction fixes (Paul Leisy)
• CKD trace command (Valery Pogonchenko)
• Performance enhancements (Juergen Dobrinski)
• CGEBR/CGDBR instructions (Jan Jaeger)
• CEGBR/CDGBR instructions (Kris Van Hees)
• CKD 9345 support (Greg Smith)
• Storage Key Assist (Jan Jaeger)
• Move Page Facility 2 (Jan Jaeger)

Download:   hercules-2.13.tar.gz

What's new in release 2.12

Release date: 04 May 2001

• Numerous instruction fixes (Paul Leisy, Jan Jaeger, Peter Stammbach, Roger Bowler)
• FBA and CKD read-only support (Greg Smith)
• Enable ISKE/RRBE/SSKE in S/370 mode (Valery Pogonchenko)
• CCKD corrections (Greg Smith)
• CMPSC fixes for expansion (Greg Smith)
• Correct prefix alignment for ESA/390 guest in 64 bit mode SIE (Jan Jaeger)
• Card reader multiple files and EBCDIC autopad support
• Support for built-in TUN driver of Linux kernel 2.4.x
• Device I/O thread throttling (Greg Smith, Fish)
• Small optimization of vstore/vfetch and TPI (Jan Jaeger)
• Sense/Set Path Group ID for DASD (Jan Jaeger)
• Dynamic device threads (Jan Jaeger)
• Fast interrupt processing for MCK and PER (Jan Jaeger)
• Allow HET files to reside on read-only media (Leland Lucius)
• Utilities display versioning and copyright info (Greg Smith)
• Present device end on terminating console session (Jan Jaeger)
• sh panel command (Bernard van der Helm)
• 9221 power-off diagnose (Jan Jaeger)
• Debug format enhancements (Peter Stammbach)
• Fix for device threads (Juergen Dobrinski)
• Sundry new ESAME instructions and corrections (Roger Bowler, Jan Jaeger)
• Improved interrupt processing (Valery Pogonchenko)
• Incorrect-Length-Indication-Suppression facility (Jan Jaeger)
• S/370 interval timer fixes (Mark Gaubatz)
• 64-bit Interpretive Execution (Jan Jaeger)
• IEEE floating point (Willem Konynenberg)
• 64-bit panel updates (Roger Bowler)
• LPM fixes and display subchannel command (Nobumichi Kozawa)
• Fix amode64 in load_psw (Ulrich Weigand)
• Multiply Logical instructions (Vic Cross)
• Environment variables to override filenames of hercules.rc hercules.cnf and hercifc (Jan Jaeger)
• Floating point enhancements (Roger Bowler, Jan Jaeger)
• Country codepage tables (Roger Bowler)

Download:   hercules-2.12.tar.gz

What's new in release 2.11

Release date: 09 February 2001

• Sundry new ESAME instructions and corrections (Jan Jaeger)
• Panel display instruction operands (Roger Bowler)
• TRAP and RP instructions (Jan Jaeger)
• TP instruction (Roger Bowler)
• Tape data chaining patch (Brandon Hill)
• Bypass Cygwin stack problem (Greg Smith)
• Fixes for Windows port (Volker Bandke)
• SSK/ISK/RRB fix for 2K storage keys (Valery Pogonchenko, Jan Jaeger)
• Extended Translation Facility 2 (Roger Bowler)
• Divide Logical instructions (Vic Cross)

Download:   hercules-2.11.tar.gz

What's new in release 2.10

Release date: 02 February 2001

• z/Architecture support (Jan Jaeger)
• TUN/TAP support for CTC (Roger Bowler)
• OSTAILOR VSE option (Roger Bowler)
• 2K/4K storage key support (Jan Jaeger)
• Fully functional CMPSC instruction (Bernard van der Helm)
• Fix read-only AWSTAPE (Roger Bowler)
• Sundry new ESAME instructions (Jan Jaeger, Roger Bowler)
• Format-2 2K/4K IDAW (Roger Bowler)
• ESAME 5-level DAT (Roger Bowler)
• ESAME ASN authorization and ALET translation (Roger Bowler)
• ESAME linkage-stack instructions (Roger Bowler)
• ESAME subspace replacement (Roger Bowler)
• ESAME DUCT format changes (Roger Bowler)
• Unloaded tape drive support (Brandon Hill)
• Extended floating point (Peter Kuschnerus)
• Divide Single instructions (Jan Jaeger)
• EPSW instruction (Roger Bowler)
• Compressed CKD updates (Greg Smith)
• Timer update correction (Valery Pogonchenko)
• Fix MVCLE instruction (Jan Jaeger)
• Interval Timer fix (Bob Abeles)

Download:   hercules-2.10.tar.gz

What's new in release 1.71

Release date: 18 January 2001

• Compressed CKD DASD support release 2, with improved performance, shadow file support, and better reliability (Greg Smith)
• Hercules Emulated Tape format support (Leland Lucius)
• Make HET bzip2 compression optional, analogous to CCKD bzip2 (Jay Maynard)
• Fix for track overflow record zeroing (Roger Bowler)
• Clarified licensing discussion in FAQ (Roger Bowler)
• Treat printer X'37' CCW as NOP (Jay Maynard, suggested by Brandon Hill)
• Treat X'E503' MVS/XA assist instruction as no-op (Jay Maynard, suggested by Brandon Hill)
• Read commands from hercules.rc at startup (Willem Konynenberg)
• New tapelist program prints contents of 80-byte record tapes (Jim Morrison)
• Increased MAXDBLK from 3000 to 40000 and MAXTTR from 10000 to 40000 in dasdload (Volker Bandke)

Download:   hercules-1.71.tar.gz

What's new in release 1.70

Release date: 3 December 2000

• New file hercwin32.zip contains build scripts for Win32 version (Volker Bandke)
• More performance enhancements (Juergen Dobrinski)
• ALS-1 and ALS-2 support completion (Roger Bowler and Jan Jaeger)
• Extended Translation Facility (Roger Bowler)
• Pick up correct float.c module (Jay Maynard for Peter Kuschnerus)
• Distribute Windows binaries as well as Linux (Jay Maynard)
• Fix orienting bug in CKD DASD search CCW processing (Bob Abeles)
• Obtain TOD clock lock when accessing or updating 370 interval timer (Bob Abeles)
• Change license to the QPL Open Source Definition-compliant license (Roger Bowler, Jay Maynard, and Jan Jaeger)

Download:   hercules-1.70.tar.gz

What's new in release 1.69

Release date: 29 October 2000

• Correct AXR and SXR instruction results when significance exception raised (Peter Kuschnerus, with help from Mario Bezzi)
• Correct CD and CDR instruction condition code logic (Peter Kuschnerus)
• Do not generate support for square root instructions in 370 mode (Peter Kuschnerus)
• Floating point arithmetic tuning (Peter Kuschnerus)
• Performance optimization fixes (Juergen Dobrinski)
• Spelling corrections (Adam Thornton)
• Fixed version number (Jay Maynard)

Download:   hercules-1.69.tar.gz

What's new in release 1.68

Release date: 8 October 2000

• Rewritten and updated FAQ (Dave Morton)
• Compressed CKD DASD support (Greg Smith)
• Many performance improvements (Juergen Dobrinski, with help from Albert Louw and Valery Pogonchenko)
• DASD I/O optimizations (Greg Smith and Malcolm Beattie)
• Simplified building on non-Intel architectures (Jay Maynard)
• Fix for random bug in MP instruction (Mario Bezzi)
• Treat all 3505 card reader read CCWs the same (Jay Maynard)

Download:   hercules-1.68.tar.gz

What's new in release 1.67

Release date: 4 September 2000

• Win32 portability changes (John Kozak)
• Fix for 64K segment length checking in 370 DAT (Jay Maynard, found by Mario Bezzi)
• Fix for TPI storing interrupt code when no interrupt pending (Jay Maynard, found by Greg Smith)
• Skip to channel 9 and 12 support (Roger Bowler)
• Panel refresh rate speedup and command (Reed Petty)
• Fix storage protection override on fetch (Jan Jaeger)
• SIE support, with S/370 and ESA/390 modes and vector support (Jan Jaeger)
• Bugfix for MXR instruction (by Peter Kuschnerus)
• CONCS, DISCS and RCHP instructions (Jan Jaeger)
• Fix flags on intermediate subchannel status (Jan Jaeger)
• Break SYSCONS output lines when too long (Jan Jaeger)
• Floating point instructions SQDR and SQER (by Peter Kuschnerus)
• Lock Page instruction (Jan Jaeger)

Download:   hercules-1.67.tar.gz

What's new in release 1.66

Release date: 3 August 2000

• Simplify logmsg and DEVTRACE macro definitions (Jay Maynard)
• Prevent incorrect length indication on CONTROL NOP CCW (Jay Maynard)
• Complete 370 HIO processing (Jay Maynard)
• Correct nullification of TPI and TSCH (Jan Jaeger)
• Add device locking to MSCH (Jan Jaeger)
• Correct TPROT instruction (Jan Jaeger)
• Correct address wrapping on assist instructions (Jan Jaeger)
• Change interrupt logic to use longjmp on all interrupts (Jan Jaeger)
• Clear remainder of ASTE when loading ASTE with ASF=0 in translate_asn (Jan Jaeger)
• Add (incomplete) PLO instruction (Jan Jaeger)
• Fix CLCL interruption problem (Jan Jaeger)
• Fix addresswrap in MVO (Jan Jaeger)
• Make ED and EDMK perform a trial run (Jan Jaeger)
• Fix address wraparound in MVO (Jan Jaeger)
• Fix CR15 corruption in form_stack_entry, fix nullification in form_stack_entry and unstack_registers (Jan Jaeger)
• Fix loss of interrupts in PR (Jan Jaeger)

Download:   hercules-1.66.tar.gz

What's new in release 1.65

Release date: 22 July 2000

• Track overflow processing fixes (by Jay Maynard, suggested by Valery Pogonchenko)
• Added TOD clock update to STCK, STCKE, DIAG 204, and TRACE processing (by Jay Maynard)
• Fixed READ DEVICE CHARACTERISTICS alternate track values for 3380 and 3390 (by Peter Macdonald)
• Skeletal CMPSC instruction (by Bernard van der Helm)
• Added support for 3340 and 3375 DASD (by Jay Maynard, with help from Rick Fochtman and David Cole)
• Corrected interval timer update increment (by Jay Maynard)
• float.c optimization for new instruction decode and execution (by Peter Kuschnerus)
• Fix program check on TIC ccw (by Jan Jaeger)
• Fix program check on NOP ccw (by Jan Jaeger)
• Instruction decode & execution restructure (by Jan Jaeger)
• Added -fomit-frame-pointer to compiles for improved performance (by Jan Jaeger)
• Fix STCKE instruction (by Bernard van der Helm)

Download:   hercules-1.65.tar.gz

What's new in release 1.64

Release date: 4 July 2000

• Added track overflow processing for CKD DASD (by Jay Maynard)
• Makefile change to allow RPM building with RPM_BUILD_ROOT (by David Barth)
• Added NetBSD build definitions to makefile (by Soren Jorvang)
• Moved version definition to version.h and removed makefile dependency for source modules (by Jay Maynard)
• Package change: tarball now explodes into hercules-<version> subdirectory (by Jay Maynard, suggested by Soren Jorvang)
• Fix backward going TOD clock (by Jan Jaeger)
• Suppress superflous HHC701/HHC702 messages (by Jan Jaeger)
• Rework cpu.c to decode instructions by macro (by Jan Jaeger)
• Bypass bug in IBM telnet client (by Jan Jaeger)

Download:   hercules-1.64.tar.gz

What's new in release 1.63

Release date: 18 June 2000

• 3270 CCW processing improvements (by Jan Jaeger)
• OSTAILOR generalization, and new pgmtrace panel command (by Jan Jaeger)
• VM IUCV instruction correction and DIAGNOSE improvements (by Jan Jaeger)
• CPU timer and clock comparator improvements (by Jan Jaeger, after a suggestion by Willem Konynenberg)
• 3480 READ BLOCK ID and LOCATE CCW support (by Brandon Hill)
• Networking support via virtual CTCA (by Willem Konynenberg)
• Restructured CPU execution, by function call instead of switch statement (by Mike Noel)
• Support for IEBCOPY sequential output datasets in dasdload (by Ronen Tzur)
• New dasdls command lists the VTOC of a CKD DASD volume (by Malcolm Beattie)
• New AWSTAPE handling commands: tapesplt, tapemap (by Jay Maynard)
• make install target to install in /usr/bin (by Jay Maynard)

Download:   hercules-1.63.tar.gz

What's new in release 1.62

Release date: 3 June 2000

• Still more multiprocessor improvements (by Jan Jaeger)
• Dynamic CPU reconfiguration (by Jan Jaeger)
• Basic vector facility (by Jan Jaeger)
• Floating point version 6 (by Peter Kuschnerus)
• READ AND RESET BUFFERED LOG CCW (X'A4') support (by Jay Maynard)
• WRITE SPECIAL CKD CCW (X'01') support (by Jay Maynard)
• FBA DASD model reporting fixes (by Jay Maynard)

Download:   hercules-1.62.tar.gz

What's new in release 1.61

Release date: 21 May 2000

• More multiprocessor improvements (by Jan Jaeger)
• New startall/stopall panel commands (by Jan Jaeger)
• STIDP stores processor address in first digit of CPU id (by Roger Bowler)
• Correction to IPTE instruction for S/370 (by Jay Maynard)
• Dummy HIO instruction for S/370 (by Jay Maynard)
• Support for emulated 0671 FBA DASD (by Jay Maynard)
• FBA device reserve/release CCW support (by Jay Maynard)
• New OSTAILOR configuration option allows selective suppression of program check messages (by Jay Maynard)

Download:   hercules-1.61.tar.gz

What's new in release 1.60

Release date: 14 May 2000

• Multiprocessor locking improvements (by Jan Jaeger)
• Machine check and channel report word (by Jan Jaeger)
• Store Channel Report Word (STCRW) instruction (by Jan Jaeger)
• New attach/detach/define commands to allow dynamic addition and deletion of devices from the configuration (by Jan Jaeger)
• Compare and Swap and Purge (CSP) instruction (by Jan Jaeger)
• Broadcasted purging (by Jan Jaeger)
• Fix LASP instruction SASN authorization using wrong AX if bits 29-31 are 010 and SASN \= PASN (by Mario Bezzi)
• Fix SAC instruction special operation exception setting secondary space mode when ASF=0 (by Mario Bezzi)
• Remove intdrag option and replace drag command by toddrag command
• New extpending flag to improve performance (originally contributed by Valery Pogonchenko and enhanced by Jan Jaeger)
• Allow longer host name in console connected message (by Jay Maynard)
• Floating point version 5 including fixes by Mario Bezzi (contributed by Peter Kuschnerus)

Download:   hercules-1.60.tar.gz

What's new in release 1.59

Release date: 30 Apr 2000

• Missing interrupt after CSCH instruction
• S/370 DAT support (contributed by Jay Maynard)
• Tape device sense byte improvements (by Jan Jaeger)
• Read Buffered Log (CCW X'24') for tape devices (by Jan Jaeger)
• Reject Sense ID CCW for 3420 tape devices (by Jan Jaeger)
• Suppress unprintable character in HMC messages (by Jan Jaeger)
• Suppress attention interrupt if subchannel not enabled (by Roger Bowler)
• New interrupt drag factor to improve performance (by Roger Bowler)
• New toddrag and intdrag config options and drag control panel command allow drag factors to be set (by Roger Bowler)
• Light optimization on CPU critical path (by Valery Pogonchenko)
• Eliminate fetch protection override in S/370 mode (by Valery Pogonchenko)

What's new in release 1.58

Release date: 22 Apr 2000

• Support for CKD DASD volumes exceeding 2GB such as 3390-3 (by Roger Bowler)
• 3274-1D SELECT RB/RMP/RBP/WRT commands (by Roger Bowler)
• Support for 3270 14-bit SBA addressing and inbound SFE order (by Roger Bowler)
• Command reject if Write Structured Field CCW issued to a 3270 without extended attributes (by Roger Bowler)
• Fix missing CSW_IL indication when CCW count exhausted (by Roger Bowler)
• Do not set unit exception if CCW count is zero (by Jan Jaeger)
• Suppress space switch event program check messages (by Jan Jaeger)
• Branch tracing and cross memory tracing for BALR, BASR, BASSM, BAKR, BSA, BSG, SSAR, PC, PT, PR instructions (by Jan Jaeger)
• New diagnose instruction to stop CPU (by Jan Jaeger)
• Drag factor option slows down TOD clock, to decrease overhead on very slow machines (by Jan Jaeger)
• Correction to PR instruction (by Jan Jaeger)
• Correction to LASP instruction (by Jan Jaeger)
• Make CLCLE/MVCLE/CKSM instructions conditional features (by Jan Jaeger)
• Enable channel measurement mode (by Jan Jaeger)
• Modify program_check() to handle shadow registers correctly (by Jan Jaeger)
• Change DAT to favour PSTD in TEA, to give reduction in page fault path length (by Jan Jaeger)
• Avoid clearing registers at CPU reset (by Jan Jaeger)
• Leave GPR, AR and FPR intact during CPU reset for SADUMP (by Jan Jaeger)
• Zeroize field for called space identification in PC stack entry (by Jan Jaeger)
• New CCW X'8D' (Write Update Key and Data) required by STOW (by Jan Jaeger)
• Fix for 0B7 abend in D M=CHP command (by Jan Jaeger)
• Floating point version 4 including fixes by Valery Pogonchenko (contributed by Peter Kuschnerus)
• Fix incorrect second operand address in MVCIN instruction (by Roger Bowler)
• Correct sign of zero result in SRP instruction (by Roger Bowler)
• Erase Gap (CCW X'17') for tape devices (by Roger Bowler)
• Activate MIPS counter on control panel (by Dutch Owen)
• Suppress tracing of ISK, SCK, and DP instructions

What's new in release 1.57

Release date: 30 Mar 2000

• Fix program check 0032 due to wrong stack entry being updated
• Fix wrong SSTD loaded by LASP instruction (found by Jan Jaeger)
• Bypass main storage lock in single CP configuration (by Jan Jaeger)
• Fix incorrect condition code in PGIN instruction (by Jan Jaeger)
• Corrections to expanded storage instructions (by Jan Jaeger)
• New STCPS and SCHM instructions (by Jan Jaeger)
• Set more appropriate sense bytes for tape errors

What's new in release 1.56

Release date: 28 Mar 2000

• Fix incorrect unit exception on SCSI tape FSB/BSB CCW (reported by Daniel Rudin)
• Fix unit check on AWSTAPE write (reported by Axel Schwarzer)
• Close SCSI tape after tape is ejected
• Detect tapemark during SCSI tape FSB/BSB CCW
• Suppress HMC response prompt (by Jan Jaeger)
• Expanded storage support (by Jan Jaeger)
• Move Page Facility 2
• Correct signed length error in MVCK/MVCS/MVCP (by Jan Jaeger)
• Undetected CC=3 in SRP instruction
• Wrong remainder in DP instruction when dividend is less than divisor
• Specification exception in DP instruction should have higher priority than data exception

What's new in release 1.55

Release date: 22 Mar 2000

• FBA minidisk support
• Additional diagnose functions
• Allow real storage frames to be marked unusable (by Jan Jaeger)

What's new in release 1.54

Release date: 18 Mar 2000

• Address wraparound improvement (contributed by Jan Jaeger)
• Floating point version 3 (contributed by Peter Kuschnerus)
• Correction to SLDA/SRA instructions (contributed by Jan Jaeger)
• Recognize tabs and end-of-file character in ASCII cardrdr files
• Hercules-specific diagnose instructions (contributed by Jay Maynard)
• Correct missing timer interrupt when interval timer goes from zero to negative (thanks to Valery Pogonchenko)
• Enable HMC system console in S/370 mode
• Correct sign propagation in multiply instruction
• Reduce CPU thread priority (thanks to Steve Gay and Reed H.Petty)

What's new in release 1.53

Release date: 01 Mar 2000

• Add BSF/FSF/BSB/FSB CCW support for tape devices
• Allow final short block in OMA fixed block files
• Allow processing of read-only AWSTAPE files and SCSI tapes
• Skeleton ctcadpt module for future 3088 support
• Correctly nullify IC/NI/OI/XI/CLM/STCM/ICM/TRT instructions on page translation exception (thanks to Jan Jaeger)
• Improved floating point support (contributed by Peter Kuschnerus)
• Correct shift result when shift count exceeds 31 (thanks to Glen Herrmannsfeldt and Jay Maynard)
• Fix incorrect MVCL cc=3 when destination length is 1

What's new in release 1.52

Release date: 19 Feb 2000

• Prevent incorrect length indication on 3270 Select CCW
• 2K storage protection for S/370
• Prevent wait for console port (thanks to Malcolm Beattie)
• Allow keyword parameters in configuration file
• New sysepoch and tzoffset parameters (thanks to Jay Maynard)
• Adjust TRACE and DIAG204 for extended TOD (thanks to Jan Jaeger)
• Set TOD clock in SCK instruction (thanks to Jan Jaeger)

What's new in release 1.51

Release date: 15 Feb 2000

• 3270 read buffer fix for OS/360 NIP
• Floating point instructions (contributed by Peter Kuschnerus)
• Remove 32-bit pointer dependency from dasdload for Alpha
• HMC system console support (contributed by Jan Jaeger)
• Correct condition code after decimal overflow (thanks to Jan Jaeger)
• Set reference and change bits for PSA access (thanks to Jan Jaeger)
• New CRLF option for printer and card punch (default is now LF)

What's new in release 1.50

Release date: 10 Feb 2000

• Remove interval timer debugging message
• Fix hung console resulting from attention interrupt fix in 1.49
• Seek and Set Sector (CCW=27) for Itel 7330 DASD controller
• Correct SIGP handling of non-existent CPUs (thanks to Jan Jaeger)
• Extended TOD clock bit in processor features (thanks to Jan Jaeger)
• Alternate control panel help text (contributed by Dutch Owen)
• Card reader end of file option (thanks to Dutch Owen)
• Card reader ASCII/EBCDIC auto-detection
• Fix SIGP RESTART to target correct CPU (thanks to Jan Jaeger)
• Allow VTOC size and location to be specified for dasdload.

What's new in release 1.49

Release date: 05 Feb 2000

• Alternate control panel (contributed by Dutch Owen)
• Present attention interrupt when console connects
• Fix dasdload CVOL logic (thanks to Jay Maynard)
• Fix dasdload initialization of empty PDS
• Allow device size to be specified for dasdload Note: the volser record in the pack layout file must be changed to specify the device type and cylinder count; the device type is no longer specified on the command line.
• Add dummy Set Clock instruction (does nothing except set cc 0)

What's new in release 1.48

Release date: 31 Jan 2000

• Fix dasdload to handle note lists (prevent 32D abend)
• I/O interrupt performance enhancement
• Correctly detect overflow in signed Add/Subtract instructions
• Fix track overflow problem
• 3270 Read Modified CCW

What's new in release 1.47

Release date: 23 Jan 2000

• Allow tn3270 or telnet client to connect to specific device number
• Align control panel instruction counter (thanks to Mario Bezzi)
• Ensure panel display does not corrupt TEA (by Jan Jaeger)
• STIDP incorrectly propagates high order bit of CPU model (fixed by Jan Jaeger)
• Fix byte-ordering problem with CKD DASD header on non-Intel machines (reported by Adam Thornton)
• STIDC instruction
• Extended TOD clock (STCKE and SCKPF instructions)
• 3211 Load FCB and Diagnostic Read CCW
• 3270 Read Buffer CCW
• Fix console.c to inhibit input while console has status pending

What's new in release 1.46

Release date: 11 Jan 2000

• HSCH instruction
• SIGP instruction
• Suppress tracing of page faults
• Display control registers and access registers after program check
• Add regs parameter to program_check function calls
• New panel command to perform store status function
• Suppress tracing of CCW file protect and end of cylinder errors

What's new in release 1.45

Release date: 08 Jan 2000

• Make MVCL/CLCL interruptible (contributed by Jan Jaeger)
• Diagnose 204 (contributed by Jan Jaeger)
• Read Channel Subsystem Info (contributed by Jan Jaeger)
• Fix incorrect register count in TRACE instruction
• Correct nullification of STM/LM/LAM/STAM/STCTL/LCTL/STCM and SS instructions whose operands cross a page boundary
• Suppression on Protection with Virtual-Address enhancement
• Select correct address space for MVCS/MVCP (fixed by Jan Jaeger)
• Correct registers after CLCL/CLCLE with non-zero condition code
• Defer clock comparator interrupt while instruction stepping
• Remove 32K limit on data chained write CCWs for non-CKD devices
• Correct overrun error on data chained write for FBA DASD

What's new in release 1.44

Release date: 01 Jan 2000

• Support for 9336 FBA DASD
• Read Replicated Data command for FBA DASD
• Prevent recursive program check after instruction fetch error
• Operand tracing for MVCL/CLCL and RRE instructions

What's new in release 1.43

Release date: 27 Dec 1999

• New control panel command: devlist
• Write Update Data (X'85') CCW for CKD devices
• Makefile changed to use $(CC) instead of cc
• Fix dat.c to prevent ASN translation specification exception (program check X'0017') if subspace group facility is installed and ASF is one
• Fix cpu.c to clear ILC before fetching instruction to prevent PSW being backed up if access error occurs during instruction fetch
• Correct program check ILC when instruction is nullified
• Obtain CPU model number for STIDP from configuration file (contributed by Jay Maynard) Note: if upgrading from an earlier release, you must change your hercules.cnf file to add a valid CPU model number after the CPU serial number
• Prevent wait after devinit (thanks to Jay Maynard)
• Open printer with O_SYNC to ensure buffers flushed (suggested by Daniel Seagraves)
• Fix xmem.c to prevent loop in program_call when loading 4-word ETE (thanks to Jan Jaeger)
• Improved TLB lookup (contributed by Jan Jaeger)

What's new in release 1.42

Release date: 16 Dec 1999

• New makefile builds both S/370 and ESA/390 executables: hercules-370 and hercules-390 (contributed by Jay Maynard)
• 3480 Set Path Group Id and Unassign CCWs (contributed by Jan Jaeger)
• CFC and UPT instructions (contributed by Peter Kuschnerus)
• Card punch support
• Erase (X'11') CCW for CKD devices
• Correct setting of translation exception address
• Correct file mode when opening printer file
• Correct condition code for shift arithmetic instructions

What's new in release 1.41

Release date: 07 Dec 1999

• Set reference and change bits correctly for main storage accesses by channel, dat, xmem, stack, block, and service modules (thanks to Jan Jaeger)
• New devinit command (contributed by Jay Maynard)
• Reject control panel virtual storage display command if CR1=0
• Fix dasdload to correctly write EOF record for empty file and to correctly fill block overhead fields in format4 DSCB.
• Diagnose functions MSSFCALL and SCPEND (contributed by Jan Jaeger)
• Corrections to service.c and assist.c (contributed by Jan Jaeger)
• Alpha platform portability definitions (contributed by Jay Maynard)
• 3480 Assign CCW (thanks to Rick McKelvy)

What's new in release 1.40

Release date: 30 Nov 1999

• New DASDISUP program performs OS/360 IEHIOSUP function
• Correct SCSW handling for suspend/resume
• Forward space file CCW for tape devices
• 3480 load display CCW (contributed by Jan Jaeger) and sense path group id CCW (thanks to Rick McKelvy)
• Correct handling of OMA tape headers to correctly recognize tape mark and to align headers to 16-byte boundary
• EBCDIC character translation of CCW data displays
• Fix command reject for CKD read commands outside the domain of a locate record

What's new in release 1.39

Release date: 24 Nov 1999

• Concurrent sense
• I/O initial status interruption
• Channel program suspend/resume function and RSCH instruction
• Read Device Characteristics CCW for 3480
• Fix incorrect command reject on Sense Subsystem Status CCW
• Increase 3270 write buffer size to prevent console I/O error when using Zap function of ZZSA
• Fix very nasty error in dat.c causing wrong bytes to be fetched or stored when operand crosses page boundary
• Remove temporary fix to ckddasd.c introduced in 1.37

What's new in release 1.38

Release date: 22 Nov 1999

• New panel commands to allow storage alteration
• Fix incorrect I/O parameter on attention interrupt (thanks to Jan Jaeger for reporting this bug)
• Clear PMCW correctly during I/O reset
• Change 3270 control unit type to 3274-1D
• Fix restart command broken by 1.37

What's new in release 1.37

Release date: 19 Nov 1999

• Storage range display
• EBCDIC character translation of storage displays
• New breakpoint command (contributed by Dan Horak)
• Messages go to log file as well as screen if stdout is redirected
• Fix missing interrupt caused by channel.c failing to obtain device lock before setting interrupt pending
• Fix incorrect cond code 1 in attention SCSW built by console.c
• New Read Channel Path Information service call
• Temporary fix to ckddasd.c multitrack search
• Addition of Read Device Characteristics and Sense Subsystem Status commands for CKD devices
• New DASDPDSU program to unload PDS members from a CKD volume

What's new in release 1.36

Release date: 12 Nov 1999

• Clear subchannel instruction
• Correct fault causing control panel display corruption

What's new in release 1.35

Release date: 09 Nov 1999

• Improved control panel user interface
• New control panel commands: start, stop, restart, ipl, loadparm
• New loadcore command to load disk image files
• S/370 interval timer
• Allow 31-bit mode linkage in lock instructions
• Support for PCI in ESA/390 mode as well as S/370 mode
• Correct problem causing false channel protection checks

What's new in release 1.34

Release date: 29 Oct 1999

• New DASDLOAD program to create a CKD volume from unloaded PDS files
• Correct CKD module to prevent record not found error on multitrack Read Count CCW

What's new in release 1.33

Release date: 26 Oct 1999

• Write support for SCSI tapes and AWSTAPE files
• Correct handling of REWIND command for AWSTAPE files
• Correct nasty bug in Subtract Logical instruction (thanks to Roland Goetschi for finding this bug)
• Ensure unique TOD clock values for Store Clock
• Correction to unstacking process for PR instruction
• Implementation of Read Multiple CKD command

What's new in release 1.32

Release date: 18 Oct 1999

• Support for virtual tapes in OMA (Optical Media Attach) format
• SCSI tape support (read-only)
• Minor corrections to CKD DASD support

If you have a question about Hercules, see the Hercules Frequently-Asked Questions page.

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