SDL-Hercules-390/hyperion

Issues somebody may already be working on are listed last. List everything by date

• MISSING DOC for already Merged PR #905

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  DOC BUG Missing

  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  SDL-Hercules-390/hyperion#911 · Opened Nov 14, 2026

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• z/OS 3.1 OSA QDIO comes up as Layer 3 / TUN (NOARP); guest cannot transmit (SETASSPARMS NOT SUPPORTED) — L2/TAP path works fine

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#904 · 2 comments · Opened Nov 13, 2026

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• Hercules web site displaying incorrect contents! ('gh_pages' html repository deployment keeps failing)

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  BUG HELP!

  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  SDL-Hercules-390/hyperion#902 · 2 comments · Opened Nov 11, 2026

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• red hat 8.10 on Hercules Mainframe 4.9

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  Difficulty 4/5 3-5 days Newbie friendliness 28/100

  SDL-Hercules-390/hyperion#899 · Opened Nov 10, 2026

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• Issue getting ICSF to work on z/OS 3.2 under Hercules 4.10

  May be free again @Juergen-Git claimed this 32 days ago, and no pull request is open. Open

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  Missing Ongoing

  SDL-Hercules-390/hyperion#890 · 14 comments · 1 assignee · Opened Oct 10, 2026

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• program_interrupt() delivers to sysblk.regs[cpuad], not the REGS passed in - silent trap for detached REGS copies

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  Difficulty 5/5 Over a week Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#866 · Opened Aug 23, 2026

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• Intermittent crash possibly related to TCPIP start/restart

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#865 · 7 comments · Opened Aug 20, 2026

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• Manually enabling FACs. when use zOS 3.1

  May be free again @Fish-Git claimed this 114 days ago, and no pull request is open. Open

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  QUESTION... Researching...

  SDL-Hercules-390/hyperion#861 · 4 comments · 1 assignee · Opened Jul 22, 2026

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• A Couple of minor DASD related changes

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  Difficulty 4/5 3-5 days Newbie friendliness 49/100

  SDL-Hercules-390/hyperion#860 · 1 comment · Opened Jul 19, 2026

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• Improve --NoUI mode when running on non-Widows platforms

  May be free again @agadsby claimed this 164 days ago, and no pull request is open. Open

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  BUG IN PROGRESS...

  SDL-Hercules-390/hyperion#849 · 4 comments · 1 assignee · Opened Jun 2, 2026

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• Empty configuration file yields warnings in startup messages

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  BUG Enhancement Ongoing TXF

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  SDL-Hercules-390/hyperion#845 · 7 comments · Opened May 23, 2026

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• Inconsistent console display background on black-on-white terminal emulators

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  BUG HELP! L

  Difficulty 4/5 1-2 days Newbie friendliness 47/100

  SDL-Hercules-390/hyperion#844 · 11 comments · Opened May 21, 2026

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• Subtle ABI mismatch in bundled SoftFloat library

  May be free again @Fish-Git claimed this 210 days ago, and no pull request is open. Open

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  Ongoing Researching...

  SDL-Hercules-390/hyperion#833 · 8 comments · 1 assignee · Opened Apr 18, 2026

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• Question about TLB lookup logic

  May be free again @Pierre-Laumeau claimed this 211 days ago, and no pull request is open. Open

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  Discussion Enhancement Ongoing Researching...

  SDL-Hercules-390/hyperion#828 · 10 comments · 1 assignee · Opened Apr 10, 2026

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• Ubuntu 24.04 glibc Fortification at runtime problem.

  May be free again @wrljet claimed this 226 days ago, and no pull request is open. Open

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  SDL-Hercules-390/hyperion#823 · 5 comments · 1 assignee · Opened Apr 2, 2026

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• IPO/LTO inter-procedural-optimization/link-time-optimization option missing

  May be free again @wrljet claimed this 179 days ago, and no pull request is open. Open

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  A Enhancement L

  SDL-Hercules-390/hyperion#822 · 4 comments · 1 assignee · Opened Apr 2, 2026

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• ARCHLVL cpu reset leading to interrupt handling race

  May be free again @gottfriedleibniz claimed this 235 days ago, and no pull request is open. Open

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  BUG Ongoing

  SDL-Hercules-390/hyperion#806 · 18 comments · 2 assignees · Opened Mar 2, 2026

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• Additions for 370 Extensions Facility (Y instructions)

  May be free again @Fish-Git claimed this 305 days ago, and no pull request is open. Open

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  Enhancement QUESTION...

  SDL-Hercules-390/hyperion#799 · 26 comments · 1 assignee · Opened Jan 12, 2026

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• Documenting Hercules messages: thoughts on best way to approach this endeavor

  May be free again @wrljet claimed this 361 days ago, and no pull request is open. Open

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  Discussion DOC BUG Enhancement

  SDL-Hercules-390/hyperion#785 · 10 assignees · Opened Nov 19, 2025

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• QETH networking with utun devices on macOS

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  A Enhancement HELP! Related

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#736 · 24 comments · 2 reactions · Opened Apr 6, 2025

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• async 'sf' cmd can trip lock bug in dasd caching causing CRASH

  May be free again @Fish-Git claimed this 430 days ago, and no pull request is open. Open

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  BUG Ongoing

  SDL-Hercules-390/hyperion#618 · 1 assignee · Opened Feb 6, 2024

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• Add LPAR name as prefix of thread names

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  Enhancement

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#577 · 23 comments · Opened Jun 25, 2023

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• Publish tags for submodules corresponding to Hercules releases

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  Enhancement

  Difficulty 2/5 1-3 hours Newbie friendliness 35/100

  SDL-Hercules-390/hyperion#530 · 4 comments · Opened Dec 1, 2022

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• PFPO is never setting the CC (and is never setting GR1 either)

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  BUG HELP! Ongoing

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  SDL-Hercules-390/hyperion#527 · 7 comments · Opened Nov 29, 2022

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• Selective branch tracing enhancement

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  Enhancement

  Difficulty 5/5 Over a week Newbie friendliness 30/100

  SDL-Hercules-390/hyperion#503 · 1 comment · Opened Sep 18, 2022

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• Hercules lack of Linux "suspend/resume" support (i.e. Ctrl+z, `fg`, etc) causes problems with e.g. tmux

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  Enhancement HELP! L

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  SDL-Hercules-390/hyperion#487 · 32 comments · Opened Apr 30, 2022

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• OSA VIPA feature incompatible with multiple OSA device emulation.

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  BUG Discussion QUESTION... Researching...

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  SDL-Hercules-390/hyperion#485 · 8 comments · Opened Apr 7, 2022

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• Configuration-z/Architecture-Architecture-Mode and ESA/390-Compatibility-Mode Facilities

  May be free again @s390guy claimed this 2083 days ago, and no pull request is open. Open

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  Discussion Enhancement Related

  SDL-Hercules-390/hyperion#336 · 2 comments · 1 assignee · Opened Nov 29, 2020

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• Likely incorrect Hercules breaking/stepping handling/support?

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  BUG Discussion Enhancement Related

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  SDL-Hercules-390/hyperion#322 · 14 comments · Opened Sep 9, 2020

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• VMS Static Builds

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  BUG Discussion Enhancement HELP! L

  Difficulty 4/5 3-5 days Newbie friendliness 32/100

  SDL-Hercules-390/hyperion#298 · 6 comments · Opened May 2, 2020

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• DEVBLK cleanup

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  Discussion Enhancement

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  SDL-Hercules-390/hyperion#288 · 2 comments · Opened Mar 10, 2020

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• Disallow LPARNUM nn for ARCHLVL S/370 without FORCE option

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  Discussion Enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  SDL-Hercules-390/hyperion#256 · 6 comments · Opened Sep 21, 2019

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• Missing: DASD "Write Full Track" (95) and "Write Track Data" (A5) CCW support

  May be free again @dasdman claimed this 2892 days ago, and no pull request is open. Open

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  Enhancement HELP! Missing

  SDL-Hercules-390/hyperion#85 · 3 comments · 1 assignee · Opened Mar 25, 2018

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• z14 z/Architecture-only mode (CZAM)

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  Enhancement Missing Related

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  SDL-Hercules-390/hyperion#78 · 1 comment · Opened Dec 20, 2017

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• MISSING Facilities support

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  Enhancement HELP! M Missing Ongoing

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  SDL-Hercules-390/hyperion#77 · 51 comments · Opened Dec 18, 2017

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• Externalize non-engine related Hercules components

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  Discussion Enhancement M Ongoing

  Difficulty 5/5 Over a week Newbie friendliness 10/100

  SDL-Hercules-390/hyperion#76 · 1 comment · Opened Dec 18, 2017

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• HTHREADS review/redesign/rewrite with Windows R/W lock support

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  Enhancement Related

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  SDL-Hercules-390/hyperion#34 · Opened Nov 27, 2017

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• Instruction registers display is buggy/unreliable

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  BUG Discussion Enhancement Related

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  SDL-Hercules-390/hyperion#32 · 2 comments · Opened Nov 26, 2017

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