@Antibiotic said in ns8250: UART FCR is broken duirng boot OS:
What did you add?
I just used a 2 spare NAND gates to toggle one bit on board select.
BTW, this is going back over 40 years to when I did that. The IMSAI was an S-100 bus computer. Various makes of S-100 bus computers were popular in the late 70s, until the IBM PC came out. They were generally used to run the CP/M operating system.
BTW, I built that IMSAI from a kit, which was essentially bags of parts that had to be soldered to the circuit boards and then the system assembled.