Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

Tomas, Thanks so much for the offer. I will look at the Bitscope website to see if it would help. -Denis On Fri, Dec 29, 2017 at 3:36 PM, Tomas Kuchta wrote: > I have one of those simple Bitscope scopes/analysers for slow RPi type > interface hacking it might

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I have one of those simple Bitscope scopes/analysers for slow RPi type interface hacking it might be the right tool for the job and it runs on Linux. Would that help? Do you want to borrow it? Check the Bitscope website for details, but it is good enough for serial ports. Perhaps even decoding

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I made the measurements with my 'scope. The voltages and waveforms are identical comparing DTR, RTS (also RXD), although I am surprised a little that the pulses on DTR are as large as they are: 2.4V swing. Must be some resistance in the supply to the drain. But the level is up at 11.6V, so

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I will make those measurements, but I am doubtful it will show anything. The schematic I have shows DTR to be the collector and RTS to be the low end of the emitter resistor of the output NPN. I did see solid pulses on the emitter with sigrok. But perhaps DTR and/or RTS are pulsed when they

Re: [PLUG] Am I asking the "right question"

in 2009 I messed with debootstrap to set up a ide drive in a usb caddy - When I was done, put the drive in a headless box, power it up and it would boot into a new debian box. I forget where installing grub fit into this process. for sure it was a building a "normal" debian install on a blank