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Forum Index : Microcontroller and PC projects : CMM2 G2: issues with USB keyboard and ...

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homa

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Joined: 05/11/2021
Location: Germany
Posts: 489
Posted: 04:45pm 17 Nov 2025
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Hello Peter,

I am having problems with my Microsoft USB keyboard ‘Wired Keyboard 200’ on my CMM2 G2 with version 5.07.02b11. I could only make entries after resetting or restarting several times.  
As there were also issues with music playback in the game Knightmare by Leonicolas, I updated to CMM2V6.00.00b5. ( https://www.thebackshed.com/forum/ViewTopic.php?TID=16416&P=11#246923 )
I assumed this would solve the issues. Unfortunately, this was not the case and now the keyboard no longer works at all.
I therefore reverted to Colour Maximite 2 firmware V5.07.01.
The keyboard now works again, but the error message in the game (‘Error in Music.inc line 67: A hard error occurred in the Low Level Disk I/O Layer").

Another question   : It seems that only the upper USB port is working. I had an Xbox controller connected to the lower one via a USB cable. Now, the mouse doesn't work there either. Could that be the case, and do you have any advice on how I can get the port/mouse working again? When I connect the mouse to the top port, its LED lights up.

Thanks in advance.

Matthias
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10601
Posted: 04:56pm 17 Nov 2025
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You should raise CMM2 issues on this thread because Gerry (disco4now) is looking after the firmware now. The top port is only for a PS2 compatible mouse - it is not a USB port. I suggest removing the battery with the machine powered off and waiting for a minute then restarting to completely reset the device. 6.00.00b5 should be more compatible with USB keyboards than anything else but Gerry can better advise on this.
 
homa

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Joined: 05/11/2021
Location: Germany
Posts: 489
Posted: 10:04pm 17 Nov 2025
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top port is usb-keyboard,
bottom port is ps2-mouse.

you are right, it is not a usb-port, my experiment with the Xbox controller was therefore pointless. The mouse is working again; with all the flashing back and forth, I forgot about the "OPTION mouse 0".  

However, the problem with the new beta and the keyboard still persists, as does the problem with MOD playback in the game.
 
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