r/toughbook • u/Affectionate-Pace-32 • 5d ago

CF-20 Comport/RS232in DOS

Hi Guys,

Could CF-20 use the COM port in DOS ?

I try to edit the Saber Radio program in DOS with 4008 BOX and CF-20, but there seems to be no signal coming out the COM port, I had check the 4008 BOX and Saber Radio program is working on Desktop PC, please advice, thanks~

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u/michielsanders 5d ago

The COM port on that is on the keyboard is a usb type, so that will not work in DOS because of drivers. A COM port on the tablet part itself is true serial, but this a factory installed option at ordering.

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u/zap_p25 5d ago

It's got to be a true PCI based serial port. The USB based ones won't work correctly due to a lack of drivers in DOS. I also assume you are disabling the cache to get the RSS to run properly as I seem to remember the Saber RSS and the X9000 RSS being some of the more picky with CPU clock speeds.