In the Hackaday file section, I now placed the almost-latest version of the schematic, and 3 assembly drawings that will make it easy to find the components on the pcb when you build it. For convenience, the typenumbers of the IC's are printed on the pcb.

The new pcb's (ISA2532) have arrived from my sponsor PcbWay. As always, the quality is very good and they deliver quite fast.
Builders of the KIT will now receive this pcb, so there is no need any more for the modifications with all the wires. The pcb was tested by building an Isetta with it, and it works perfectly.

The SymbOS version for Isetta is now practically bug-free.

SymbOS has a shutdown command, that switches VGA screen and the power LED off. After pressing the button at the front, it will start-up again.

The real-time clock/calendar is now also working. It keeps running during shutdown, and during ZX-Spectrum or other applications.

On october 11th/12th, Isetta will be at the SymbOS stand in the Nixdorf Museum in Paderborn (Germany):
https://www.hnf.de/veranstaltungen/events/date/2025/10/11/cal/event/tx_cal_phpicalendar/retro-computer-festival-1.html

For all of you who want to build one, I sell pcb's on my new Envionic website (not a HTTPS connection possible yet).