Move GPIO mappings into a single module and select a board profile at process startup instead of at compile time: Build every GPIO-facing utility for every supported profile. At the same time, we remove support for the historical AIBOM board type since it's the only one using positive logic, the other three variants share the same electrical behavior.
Run piscsi, scsimon, scsiloop, scsidump, or sasidump with -C=STANDARD, FULLSPEC, or GAMERNIUM. FULLSPEC remains the default. To select a profile for the systemd service, set PISCSI_CONNECTION_TYPE and restart the service.
Restore the sasidump tool for dumping physical SASI hard disks to local file through piscsi GPIO. It has been slightly refactored to align with the current C++ coding standards.
Introduce a SASI controller and SAHD disk implementation alongside the existing SCSI path. Select the appropriate controller when attaching a device, prevent SASI and SCSI devices from sharing a target ID, and implement SASI-specific selection, message, status, timing, and LUN handling.
Restore SAHD in the protocol and expose it consistently through the device factory, command-line client, configuration validation, web interface, drive profiles, and manual. Enforce the two-LUN limit for SASI targets wherever device definitions are created or parsed.
Bring back handling of the hdf image format and map it to the SAHD device type. The hdf file ending is the established one for SASI raw disk images used in the X68000 emulation community, however it is a raw data format without any special header.
Add focused C++ and Go coverage for SASI devices, controller selection, LUN validation, and web-facing behavior.
Replace getopt() and usleep() dependencies with portable C++ parsing and sleeps. Refuse to execute the GPIO loopback diagnostic off Linux/Raspberry Pi hardware, and omit the hardware-only target from non-Linux Meson builds.
Forward command-line arguments to GoogleTest and mark the Meson target as gtest protocol so filtering, seeds, and individual results are available. Harden the service tests against unavailable socket capabilities and environment-dependent privileged ports, and skip the Linux-only interface assertion elsewhere.
Daniel Markstedt