English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 21 February 2010, 05:22   #1
Photon
Moderator

Photon's Avatar
 
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,174
KeyRah test!

I'd like to keep this separate from my Keyrah 'question' thread, since I did some testing and read some muttering about Keyrah performance in Pinball Fantasies.

Software used: Asm-One, Gravity-Force, Pinball Dreams (all in the line of duty of course!! Hehe.)

Setup: Core2Duo+ATi 4800 Series, latest WinUAE (with gfx_backbuffers=0 and 50Hz on a CRT), two USB keyboards.


At first when I compared the keyboards, I wasn't quite sure which was the best. In Gravity-Force you can instantly tell any delay - for the sound card, by boosting to land on a platform and checking the bounce sounds vs. the visual bounce of the spaceship, and for the keyboard delay, the delay between pressing Enter and the shot ejecting from it.

I found the sound delay negligible, but the fire delay less so. And I have an integrated sound card. You can set it to buffer size 1 without side effect, but even so, that means the keyboard delay was 'bad for both'. I couldn't tell them apart, except in AsmOne where I could type faster by nature (less typos), my fingers having been honed by an Amiga keyboard since time immemorial. Or something

Now, I have a freaky but sane setup, ie. 'some cheap USB hub' with a single USB lead going into a walk-in closet that serves as computer room.

And when I tested the hub with my good optical mouse and mouserate.exe, the report rates varied from 83 to 1037 Hz. Not good.

So I tested both USB keyboards in my 'dedicated 5 meter USB lead' which goes to a USB port overclocked to a stable 500Hz (normally intended for a mouse since I used to play online FPS), and the difference was obvious. Both keyboards performed MUCH better.


Conclusion: any USB keyboard sucks in a hub (whether it's my cheap König one or one built into some device like a screen), and Keyrah is no worse than any USB keyboard.

I did find that Keyrah had a tendency to 'repeat' a key pressed on one of my PCs; but since it was hotplugged back and forth in an emu I'm not sure it's Keyrah's fault. Could be, I guess.


I don't really understand why Jens went from a simple serial to parallel converter and a (translation) ROM to PS/2 instead of USB, but I guess it's a part of his master plan and to do with auto-configuration which is not possible on PS/2. But ofc for gaming performance, there is no subtitute for a ZERO millisecond "instant" PS/2 keyboard, even if USB lag is lowered to 1/500 second.

This is *not* a 'laying down the law' test at all; I've no way of testing the actual actuator->visual feedback delay. It's just a 'how it feels' quick user test. I would like input from the #Longplays guys, especially those who favor or disfavor the Keyrah as game input devices, as [tight/frustrating] games usually test the input->feedback loop the best.

I did set a highscore in 'Steel Wheel' with one of the keyboards - an A1200 keyboard via Keyrah. But I don't know if that counts, it was a measly 19M or so from 'some ADF'.


Since I want the absolute best for WinUAE on the occasion I use it instead of a real Amiga, I would also like to hear from those interested in making a PS/2 converter for A500 'spring' type keyboards (either from the ribbon cable point or controller pins point), and only because I hold a personal opinion these were the best made for the Amigas.

(ps. For anyone using an LCD monitor, I would instantly recommend the Keyrah! Since a 2-8ms delay over the delay built into your display will hardly be noticable.)
Photon is offline  
Old 21 February 2010, 15:33   #2
_ThEcRoW
Amiga NetRunner
_ThEcRoW's Avatar
 
Join Date: Apr 2005
Location: Spain
Age: 43
Posts: 938
I don't know, but wasn't the keyrah advertised as performing like a normal usb keyboard?. I was planning on getting one, but if you say it has a delay, then it's no good for a keyboard.
_ThEcRoW is offline  
Old 21 February 2010, 19:58   #3
Photon
Moderator

Photon's Avatar
 
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,174
The (long) post says that all USB keyboards have a delay compared to PS/2 keyboards, that I could not tell any difference between the Keyrah and my previous USB keyboard, and that I would be interested in making a PS/2 keyboard adapter for A500 keyboard --> PC.

Last edited by Photon; 21 February 2010 at 21:32.
Photon is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
New Keyrah V2 amigakit.com MarketPlace 4 18 May 2013 02:42
KeyRah Photon support.Hardware 8 17 February 2010 02:56
CD32 Frog Feast test available. Test out the final! cdoty News 42 01 April 2008 16:20
Keyrah Question Charlie support.Hardware 4 25 November 2007 13:52
prob with keyrah Raislin77it support.Hardware 0 22 August 2007 20:58

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 15:12.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Page generated in 0.06759 seconds with 13 queries