ibm 5550 multistation

[flama12333]

https://en.wikipedia.org/wiki/IBM_5550

similar to 6580 Displaywriter System due to logo but different.
https://diarywind.com/blog/e/260122-developing-ps55emu.html

since the 86box emulated ibm 5550
other os such elks etc cant boot since the reserved sector has a different format also different IRQ assignments
according to akm.

[tyama501]

DOS/V uses the same architecture with IBM compatible PC but prior to that,
there were PCs like the ibm 5550 multistation in Japan.
(Although I was too young in the early 80th to see these machines...)