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Re: Faulty RAM *RESOLVED*
Posted: Mon Mar 24, 2025 9:15 pm
by Pr0f
It's not just the 6 pin mini Din format though - the SuperHermes doesn't understand what has now become the standard PS/2 scan code set - so more modern keyboards won't work with it. Older PS/2 keyboards that support switching the code pages will work if they support the scan code set the SuperHermes requires. AT keyboards will generally work.
Electrically the AT interface and PS/2 interface are idential.
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 7:13 am
by Derek_Stewart
Hi,
Every Superhermes cable to 5 Pin DIN to PS2 cable I have bought or made all work, no failures.
Even on PS/2 Switch ports
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 8:02 am
by tofro
Pr0f wrote: Mon Mar 24, 2025 9:15 pm
It's not just the 6 pin mini Din format though - the SuperHermes doesn't understand what has now become the standard PS/2 scan code set - so more modern keyboards won't work with it. Older PS/2 keyboards that support switching the code pages will work if they support the scan code set the SuperHermes requires. AT keyboards will generally work.
Electrically the AT interface and PS/2 interface are idential.
Well, PS/2 typically means "older".
I'm using an Unicomp, which is basically brand new (but built to ancient design), and it's working fine. Some of the combined USB/PS/2 keyboards you can buy these days, however, really don't work properly, that's true. But I'd reckon these are really just a few.
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 10:40 am
by Marcel_X
So if I buy a second hand vintage keyboard with a DIN AT connector, I should be good to go?
Like this one for instance:
https://www.ebay.nl/itm/276732410319?_s ... R5zH8s25ZQ
Or a nice black one with a PS2 to DIN AT adapter?
https://www.ebay.nl/itm/156545285791?_s ... R_CJjc65ZQ
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 5:14 pm
by Pr0f
I went for this keyboard in the end -
viewtopic.php?t=4554 (Cherry comptact keyboard)
I haven't had time to look at the protocol differences between this one and what my Belkin KVM expectes / delivers - but no ps/2 keyboards that I own worked with the SuperHermes - only this Cherry keyboard.
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 5:25 pm
by tofro
Pr0f wrote: Tue Mar 25, 2025 5:14 pm
I went for this keyboard in the end -
viewtopic.php?t=4554 (Cherry comptact keyboard)
I haven't had time to look at the protocol differences between this one and what my Belkin KVM expectes / delivers - but no ps/2 keyboards that I own worked with the SuperHermes - only this Cherry keyboard.
That's exactly the opposite of my experience. I have
no PS/2 keyboard (and I have at least 5) that won't work with SuperHermes. I guess the only thing this shows is: YMMV.
Re: Faulty RAM *RESOLVED*
Posted: Tue Mar 25, 2025 5:39 pm
by Pr0f
Still - I was in the process of building a PS/2 snooper device - that could also double as a go between for those keyboards or KVM's that don't play ball with s/H - as I would really like to hook it up to the KVM along with it's other stablemates.