Looks weird...

The bottom pic has the normal AT P8/P9 layout, so that's not the problem.

Trying to find information on the system, but Tulip "PC40" doesn't ring up hits. Could is perhaps be a Vision Line DC? A pic of the system - and of the motherboard, specifically of the area around the power connector - could help.

Assuming we can't find any more documentation, you can figure out the pinout by testing for continuity between points of known voltage on the motherboard and the pins of the PSU connector. An ISA slot would be the obvious place to find +12V, -12V and -5V; you can find +5V and GND all over the place.

See here for the ISA pin assignment:
https://old.pinouts.ru/Slots/ISA_pinout.shtml

Sorry, I meant Tulip TC40. Below is images of the motherboard, and the PSU. The motherboard has an additional power connector, but I could not see any such cable on the original PSU.

You need to make measurements on the PSU pins of the mainboard.
Look for
+5V
-5V
+12V
-12V
GND
The orange wire is probably the power good signal.
Once you are done rewire the new PSU according to your measurements.

Edit:
Little pinout help:
https://upload.wikimedia.org/wikipedia/common … SA_Bus_pins.png

Thank you, so I just check continuity between the specified pins on the ISA slot and power connector?
It seems like "Blue" on the Tulip PSU corresponds to "Yellow" on a regular AT, since the 12V pin on the Molex connectors are Blue. That is a good sign, since they are flipped on the P1/P8 connector.

Pravnuk wrote:

Thank you, so I just check continuity between the specified pins on the ISA slot and power connector?.

Yes. Proprietary connectors have weird colors sometimes but ISA pinouts never lie.

Pinouts corresponded to AT standard. Now I have a more delicate problem: Error beep code 3-1-4-1.. Computer powers on, but gives no video 😒

Looks like the same system as this one: Dutch members: Tulip Vision Line dt 4/66 (486) CPU jumper help?. There are some manuals and more info in that topic.

You might want to check the jumper settings: https://stason.org/TULARC/pc/motherboards/T/T … S-486-TC40.html

Contrary to popular belief, PSU wire colors have never been more than a recommendation in any official standard I've ever seen, and that's probably all of them.
The wire color schemes commonly seen are an unofficial convention, not an official standard.

Manufacturers can use any colors they want and still be in compliance with the standard as long as the voltages and functions are correct for the wire positions in the connectors.
.

Phoenix bios, so 3-1-4-1 means "Test 512K base address lines". Hm.

3-1-4-1 Initialize floppy controller

Miphee wrote:

3-1-4-1 Initialize floppy controller

Crap, sorry. I meant 1-3-4-1.

Try a different memory module.

There we go!!

The form factor of this computer is quite interesting. No 5.25 slot. It was assembled in Sweden and came with a huge modem card. According to their website, ViaTel was founded in 1992 as a telecommunication company. I'll send them an email and see if they can supply some history about the computer.

Thanks guys!

According to https://www.tradera.com/item/340854/371224827 … erkad-i-sverige
it's a Tulip TC40 motherboard.

mdog69

Yes, the computer is based on Tulip parts, see post #3 above.