Hello all.
After a handful of attempts, we were finally able to fully bring-up FujiNet on the H89 FujiNet board that Norberto Collado and Joe Travis had put together based on the 82C55 PIO and ESP32.
There are a few changes that we're asking for (in particular, adding the micro SD card slot, and altering the reset behavior so that it doesn't have to be explicitly turned on).
The current firmware is in fujinet-firmware master and can be built and uploaded to the ESP32 module using the fujinet-heathkit-h89
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manuals:
These manuals are typeset by Typst and are generated from the firmware, hardware, and software source code.
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emulation:
FujiNet now makes emulation appliances for every one of its targets, so that users and developers can use it and develop for it, even if hardware isn't present. The family is called FujiNet Go, and it now has an H89 target.
It is available for Windows, Linux, and MacOS. The Linux version has builds for GNOME and KDE desktops, in DEB and RPM package formats, as well as Flatpak variants.
A special thanks to Mark Garlanger and his VirtualH89 project, which forms the core of FujiNet Go H89.
Screenshots:
Linux (GNOME):

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Photos on real hardware:

FujiNet has a set of 8 block devices intended to provide disk images to a target system. As part of the integration, a disk driver that can read and write disk images mounted to the FujiNet disk slots is provided for both HDOS and CP/M.
HDOS implements a DVD driver providing FNx: devices for each slot.
CP/M's driver is implemented as a resident handler.