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John,
Here is a schematic for the keyboard connection. Check the label on the back of the PS/2 keyboard and verify the current consumption is less than 100mA. Some cheap keyboards draw over 300 mA and will brown-out the 5 volt supply on the IDU.
Brent
On 12/15/2012 7:16 AM, John Barrett wrote:
I want to take a moment to thank all who responded to my question about PFD
software crashing. Brent's advice below was most useful in that I was able
to find the limits.txt file on the second Chelton and once I reinstall the
new Cheltons will be able to plug in the parameters that were set
previously.
Here's another quick question regarding the keyboard capability of the
MFD's. Given that there are three D-sub connectors on the back of the
Chelton and no other connections, how can you hook up the keyboard even if
it has a PCMCIA slot or is a p/s keyboard?
John Barrett
-----Original Message-----
From: Brent Regan [mailto:brent@regandesigns.com]
Sent: Saturday, December 01, 2012 7:13 AM
To: jbarrett@carbinge.com; Lancair Mailing List
Subject: Re: Chelton Sport Advice
John,
There is a copy of the Limits file in the MFD. You can verify this by
putting the MFD in maintenance mode and checking the settings. Then you
can use the maintenance page to transfer the limits file to the SSFDC.
As for the PFD, it sounds like you trashed the autoexec file at vectors
the boot between flight and ground modes. In ground mode the system uses
a DOS like OS. In flight mode there is no OS, the application does all
necessary functions. Is the only thing on the screen a flashing cursor
or is there a C: prompt?
If you have an older laptop with a PCMCIA slot you can image the drive
in the good display and copy it onto the drive in the twitchy display.
Brent
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