I'm not sure why 9600 baud is such a magic number but I've had *so* many devices now that won't talk sensibly above that speed, even modern kit. I have a model 200 that I would like to get round to modernising, but there are too many projects in my head and not enough time!
Regards, Mark On 22 October 2015 at 08:11, <[email protected]> wrote: > Hello, > > It was that article that got me to dig out my M100 and a 'spare' raspberry > pi (a B+) I had sitting around. I had played with the m100 and the first > pi I had but that project fell by the wayside. I connect in a slightly > different way since I had been connecting the pi to my other machines via > the GPIO bus and a USB to serial adapter. So (to me) it seemed logical to > try the M100 and the GPIO bus. > > This meant using a level shifter (the pi is 0/3.3 v, I think) and RS-232 > is -12/+12. I found a couple of pi sites that talked about the MAX232 > chip, and I built a little adapter using this chip from a kit. > > The pi and the M100 work fairly well together. There is no hardware > handshaking, but at least raspbian and a recent version of arch both had > xon/xoff handshaking as default on /dev/ttyAMA0 (the GPIO bus serial > port). At 19200 baud things still got garbled but 9600 is just fine. I > made my own null modem with some db9 and db25 connectors and a soldering > iron. > > I even compiled dl (the linux version of desklink) and I can use the pi as > a mass storage device. I still haven't figured out how to end the dl > program from the M100, but the pi is fairly robust and with another pi (my > 3g modem/wifi hotspot) we just unplug it when we want to turn it off. I > could probably also use a timer to automatically end dl after a fixed time > but I haven't gotten around to trying this. > > Jonathan > > > On Wed, 21 Oct 2015, Duane Calvill wrote: > > While browsing the internet. I was found this article. Just wanted to pass >> it on to other to read. >> >> >> http://arstechnica.com/information-technology/2015/07/back-to-the-future-the-trs-80-model-100/ >> >>
