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AltairZ80 NET device: accept can assign an incoming connection to the wrong slot (server port pair)

Status: Open.

#573 In open-simh/simh;

· gulsko opened on Aug 2, 2026

PDP11: slow zmodem uploads

Status: Open.

#571 In open-simh/simh;

· ddrown opened on Aug 2, 2026

i1620 Exits to command prompt if printing is attempted, but no LPT device is attached.

Status: Open.

#570 In open-simh/simh;

· cube1us opened on Jul 30, 2026

MicroVAX 3900 Machine Check on 1-cpu host

Status: Open.

#569 In open-simh/simh;

· Rhialto opened on Jul 30, 2026

libpcre3, which is used by SIMH, has been removed from Ubuntu Trixie. Compiling with libpcre2 works but simh does not run.

Status: Open.

#568 In open-simh/simh;

· mkatzpdp opened on Jul 25, 2026

SAGE emulation seems broken (or the included disks are corrupt).

Status: Open.

#563 In open-simh/simh;

· johnsonjh opened on Jul 4, 2026

Bug Report, IBM SYSTEM/3

Status: Open.

#561 In open-simh/simh;

· wcarlborg opened on Jun 25, 2026

i7010: Spurious errors in Autocoder Assember using BCE instruction

Status: Open.

#560 In open-simh/simh;

· cube1us opened on Jun 21, 2026

i7010: Returns incorrect status for an invalid character

Status: Open.

#559 In open-simh/simh;

· cube1us opened on Jun 20, 2026

Feature Request: AltairZ80 - 88-VI/RTC and a time-of-day clock.

Status: Open.

#558 In open-simh/simh;

· RichCini opened on Jun 1, 2026

Cleaning up documentation (like SIMH-V4-status.md)

Status: Open.

#556 In open-simh/simh;

· AliSajid opened on May 28, 2026

set cpu noeae not being honored

Status: Open.

#553 In open-simh/simh;

· jnpastin opened on May 17, 2026