Did the ribbon come with the motherboard? Not all serial connectors on motherboards and I/O cards have the same pinout. There are mainly two common pinouts, maybe your ribbon/connector is not suitable for this motherboard as it is.

konc wrote on 2021-10-17, 13:39:

Did the ribbon came with the motherboard? Not all serial connectors on motherboards and I/O cards have the same pinout. There are mainly two common pinouts, maybe your ribbon/connector is not suitable for this motherboard as it is.

Now that I didn't know ...
I'll try and find another to test ..
appreciated..

...and no it didn't come with the motherboard..

for your information...

two possible mainboard to DB9 pinouts

Thanx for the pinouts Weedeewee...
I'm going to have to make at least another clone of the one I have that works..
I have about 10 of these cables and only one works with the Soyo..
I hope this helps someone else out...because I for one was unaware they were not standard.
rgds and thanx guys..
VS

Interesting, I have the same issue with my Soyo SY-5BT. Both serial cables that I have don't work on it.

I wasn't aware that there were two standards though. I'm guessing Soyo stuck with the older one.

Vipersan wrote on 2021-10-17, 14:10:

Thanx for the pinouts Weedeewee...

Someone else posted it here on the forum... after which I reposted it to another thread, where someone noticed a fault with the original, (the pinout names meh)
So this one is with the correct pinout names... I hope 😀 It's always tricky to find good info and since host and device can have different perspectives. oh well 😀
enjoy.

Joseph_Joestar wrote on 2021-10-17, 14:16:

Interesting, I have the same issue with my Soyo SY-5BT. Both serial cables that I have don't work on it.

I wasn't aware that there were two standards though. I'm guessing Soyo stuck with the older one.

I should've removed the old/new reference since they're both old by now.

weedeewee wrote on 2021-10-17, 14:22:

Joseph_Joestar wrote on 2021-10-17, 14:16:

Interesting, I have the same issue with my Soyo SY-5BT. Both serial cables that I have don't work on it.

I wasn't aware that there were two standards though. I'm guessing Soyo stuck with the older one.

I should've removed the old/new reference since they're both old by now.
though I prefer the staggered one.

no leave it, it helps people take an educated guess based on relative equipment age

I agree with Max on this ..
it will help as is I think.

maxtherabbit wrote on 2021-10-17, 14:26:

no leave it, it helps people take an educated guess based on relative equipment age

Vipersan wrote on 2021-10-17, 14:29:

I agree with Max on this ..
it will help as is I think.

I doubt this has truly anything to do with age, just with manufacturing preference, and I also think that the one indicated as new, is actually old.
But it was on the original so, meh :-p

Just looked at my db9 from a 440gx board (late 90's) , and it's the sequential staggered approach
older pentium1 mb cables, also sequential

anyway, measuring where the ground pin db9 pin 5 goes to on the cable should give you an indication and measuring which pin is ground on the mainboard gives you an indication if you have the right cable or not.

the more i look at that picture, the more i want to change it and remove a lot of words :-p

edit: I keep mixing up the two. one preserves the pin numbers on both sides, the other does not. I like the one that preserves the pin numbers. Argh.

USB 1.0 had this issue, NC being at the end or in the middle, with different pinouts.
Standards are good sometimes 😀
I've seen PS2 when not connected to the DIN keyboard.

COM too is a new addition to my knowledge, thanks there!!

everything I have is AT/Everex, only even seen the other style once

maxtherabbit wrote on 2021-10-17, 15:17:

everything I have is AT/Everex, only even seen the other style once

yes, same here, I like the other style better since it preserves the pin numbering on both sides. this crud is already confusing enough as is 😀

Nexxen wrote on 2021-10-17, 15:17:

USB 1.0 had this issue, NC being at the end or in the middle, with different pinouts. Standards are good sometimes :) I've seen […]
Show full quote

USB 1.0 had this issue, NC being at the end or in the middle, with different pinouts.
Standards are good sometimes 😀
I've seen PS2 when not connected to the DIN keyboard.

COM too is a new addition to my knowledge, thanks there!!

I could add the pinout of my old 8 bit isa card which has all pins in one line... though that would probably differ from board to board.
What the PS2 and DIN do you mean?

If any words need to be excised from that image, they are 'sequential' and 'staggered'. Highly ambiguous

weedeewee wrote on 2021-10-17, 15:30:

yes, same here, I like the other style better since it preserves the pin numbering on both sides. this crud is already confusin […]
Show full quote

maxtherabbit wrote on 2021-10-17, 15:17:

everything I have is AT/Everex, only even seen the other style once

yes, same here, I like the other style better since it preserves the pin numbering on both sides. this crud is already confusing enough as is 😀

Nexxen wrote on 2021-10-17, 15:17:

USB 1.0 had this issue, NC being at the end or in the middle, with different pinouts. Standards are good sometimes :) I've seen […]
Show full quote

USB 1.0 had this issue, NC being at the end or in the middle, with different pinouts.
Standards are good sometimes 😀
I've seen PS2 when not connected to the DIN keyboard.

COM too is a new addition to my knowledge, thanks there!!

I could add the pinout of my old 8 bit isa card which has all pins in one line... though that would probably differ from board to board.
What the PS2 and DIN do you mean?

Some baords have AT keyb + PS2 pins.
It happened to me to find 4 or 6 pins and to be different in two boards from different brands.
My quoted sentence came out funny as I wasn't thinking in english.

maxtherabbit wrote on 2021-10-17, 15:50:

If any words need to be excised from that image, they are 'sequential' and 'staggered'. Highly ambiguous

Sorry, I still used them 😀

Nexxen wrote on 2021-10-17, 16:17:

Some baords have AT keyb + PS2 pins.
It happened to me to find 4 or 6 pins and to be different in two boards from different brands.
My quoted sentence came out funny as I wasn't thinking in english.

Ah, yes, np, the same for the PS2 mouse headers.

Well fwiw I now have DOS622 and WIN3 on the CF card ...and mouse control..
Not tried everything as yet ..I'm considering ram expansion from 16mb to 28mb and possibly upping the level2 cache from 256 to 512 if it's doable.
The only bench I've run so far is Superscape (38.4)
what would be the best I could hope for on this 486DX4-100 system ?

maxtherabbit wrote on 2021-10-17, 15:50:

If any words need to be excised from that image, they are 'sequential' and 'staggered'. Highly ambiguous

I think I am the one who came up with these some years ago, before I knew there were the AT and Intel names 🤣.
I only ever discovered it when suddenly a COM port mouse stopped working... eventually I found out the shorter and neater COM port breakout I changed to had a different pinout, something I didn't know was a thing until then. It made the most sense to me, one has pins going 12345 6789 on DB9 end, and other 13579 2468, one is sequential, other is staggered... Easy to tell when you lift back the shroud on the DB9 side and that's where the naming came from.

I see seq on almost all my 486 and older stuff, while Pentium1 stuff is almost all staggered, and all newer stuff always staggered, I have even taken time to write a designation on my breakout cables and mobo headers so that things wouldn't be mixed up again. I have an (un)healthy mix of both available 🤣

Well I guess I also need to thank you as well then Tildo..
This would have had me confused for days if I hadn't asked..
I guess the moral of the story ...If in doubt risk looking foolish and ask.

added phils collection of benchtests to my CF card..
and of course the first thing I ran was quake
..
jumpered the turbo header ..and got a respectable 9.8
more experiments to come I think.