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Compact Keyboard SHL
Posted: Mon Oct 30, 2023 10:11 am
by dilwyn
I'm looking for a PS/2 compact keyboard to use with SuperHermes Lite on my Aurora. I've tried the Perixx Periboard 409 used on my Q68, it doesn't work on the SuperHermes Lite. Can anyone suggest another compact keyboard with PS/2 plug? Or better still, have one to sell?
(Desk getting too cluttered between QL, Aurora and Q68 - need compact keyboard without numeric keypads).
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 10:22 am
by Pr0f
I wondered about this - is the SuperHemes expecting AT keyboard protocol? Early PS/2 keyboards did offer a protocol that was similar enough that some devices would work with them, but over time, the PS/2 spec as changed subtly - and it may be these differences that might make it a non starter with SuperHermes.
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 11:27 am
by Derek_Stewart
dilwyn wrote: ↑Mon Oct 30, 2023 10:11 am
I'm looking for a PS/2 compact keyboard to use with SuperHermes Lite on my Aurora. I've tried the Perixx Periboard 409 used on my Q68, it doesn't work on the SuperHermes Lite. Can anyone suggest another compact keyboard with PS/2 plug? Or better still, have one to sell?
(Desk getting too cluttered between QL, Aurora and Q68 - need compact keyboard without numeric keypads).
Hi Dilwyn,
The SuperHermes as far as I can remember uses an AT compatible keyboard, so if it does not work with the PS/2 Keyboard, the connection to the keyboard are not correct.
The SuperHermes manual says. Keyboard connection is:
Code: Select all
SH Colour Function AT PS/2
1 Green clock 1 5
2 White data 2 1
3 - - - -
4 Black GND 4 3
5 Red +5V 5 4
I have added the PS/2 Keyboard connections.
Q68 Mouse requires Data = Pin 2, Clock = Pin 6
I have a PS/2 Switch box to switch the PS/2 connection to use a Perixx 409 Keyboard, on Q68, Q60 with AT to PS2 cable adapter, PC with USB to PS/2.
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 11:58 am
by dilwyn
Thanks Derek.
The full size keyboards with PS/2 plugs I have (Acer) whcih work with my SHL must be AT "in disguise". I'll see what I can do - I think I have AT adaptor lead in a box in the attic. If I can find a compact AT keyboard of course.
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 12:01 pm
by dilwyn
Pr0f wrote: ↑Mon Oct 30, 2023 10:22 am
I wondered about this - is the SuperHemes expecting AT keyboard protocol? Early PS/2 keyboards did offer a protocol that was similar enough that some devices would work with them, but over time, the PS/2 spec as changed subtly - and it may be these differences that might make it a non starter with SuperHermes.
Thanks. I replied to Derek. The full size Acer keyboards I have with PS/2 plugs must be AT "in disguise", as they do work with SHL.
I'll see if I can find a compact AT keyboard if such a thing still exists with a PS/2 adapter lead to see what I can do.
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 12:07 pm
by Pr0f
I think the protocol should be very similar - just back in the day the concept of 'media' keys and other things on the modern PS/2 keyboards were not a thing when SuperHermes was released - so if the initial handshake between SuperHermes and the keyboard doesn't go well - my guess is the keyboard would be ignored.
I am pretty sure that keyboard is the same as the one I have - I will have to check when I get home.
I also have a superhermes of unknown condition - Like Derek - I am using a switch box, but I can see if this will work with the 2 SuperHermes boards I have - I need to test them anyway
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 12:45 pm
by ones' complement
Derek_Stewart wrote:(sorry about the dots, can not format correctly)
Monospace only appears to work in a code block </>
Code: Select all
SH Colour Function AT PS/2
1 Green clock 1 5
2 White data 2 1
3 - - - -
4 Black GND 4 3
5 Red +5V 5 4
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 1:13 pm
by dilwyn
As I receive most of the Forum posts via the Blogtrottr service, that got me slightly confused - it appeared as anything but monospaced! Glad to see if I go on the Forum directly, it works anyhow. Useful to know.
So I'm changing the "Keyboard Wanted" to "Compact AT Keyboard Wanted for SuperHermes Lite".
It'll teach me to RTM first... (my excuse is that the computer was suppleid with PS/2 connectors and that Acer PS/2 plug keyboard just happens to work.)
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 3:10 pm
by Derek_Stewart
Hi Dilwyn,
I have a AT to PS/2 adapter, if required.
Re: Compact Keyboard SHL
Posted: Mon Oct 30, 2023 3:59 pm
by XorA