ns8250: UART FCR is broken duirng boot OS
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@Antibiotic so everything you need is working?
I would expect some errors like that on 3rd party hardware and especially on such a new version of freebsd.. But Steve is the go to guy for anything like this.. Lets see if he notices my page out to him and chimes in.
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@johnpoz said in ns8250: UART FCR is broken duirng boot OS:
I would expect some errors like that on 3rd party hardware and especially on such a new version of freebsd.. But Steve is the go to guy for anything like this.. Lets see if he notices my page out to him and chimes in
Ok will wait
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@Antibiotic Just Google "ns8250: UART FCR is broken" for lots of information on this matter.
Google is handy for those sorts of questions.
Ted
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@Antibiotic said in ns8250: UART FCR is broken duirng boot OS:
ns8250: UART FCR is broken duirng boot OS
What it mean, how to resolve?
WOW!!! There's a blast from the past!
The 8250 was the UART in the original IBM PC. I also designed and built an 8 serial port board for my IMSAI 8080 that used them. The NS refers to National Semiconductor, one of the manufacturers of that chip. In building my board, I discovered a bug that NS didn't know about. -
@JKnott Did you resolve this bug?
pfSense plus 24.11 on Topton mini PC
CPU: Intel N100
NIC: Intel i-226v 4 pcs
RAM : 16 GB DDR5
Disk: 128 GB NVMe
Brgds, Archi -
From internet research:
"You can safely ignore the message, and it will
disappear once someone adds the required support to bhyve. We should
probably also have the kernel emit the message only once. I've CC'd
Colin for comment."PS. seems that message comes with pfsense 2.7.0 for the first time (freebsd 14 current kernel) (not present in 2.5.2, 2.6.0)
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@Antibiotic said in ns8250: UART FCR is broken duirng boot OS:
@JKnott Did you resolve this bug?
I created a work around. However, I did let NS know about it.
The 8250 has 3 chip select lines which I used with a 3 bit latch to select the 1 chip of 8 that I wanted to communicate with. Turns out, the chip didn't like that. It wanted at least one of the bits to change when writing to it was completed. Because of that bug, it would continually transmit the same character. I just added a bit more logic, to cause one of the 3 select bits to change. Trivial fix.
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@JKnott said in ns8250: UART FCR is broken duirng boot OS:
. I just added a bit more logic,
What did you add?
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@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.
