Oops, small typo. I forgot to send the ^Z at the end of the file to the Model T. Step 2 should be:
* (cat FOO.DO; echo $'\cZ'; read) > /dev/ttyUSB0* Little details like that are why I have the recipe wrapped up in a shell script. —b9 On Thu, Sep 22, 2022 at 5:31 PM B 9 <hacke...@gmail.com> wrote: > Just a note for anyone interested: Birt was right. A Model T *can* tokenize > a BASIC program one line at a time from any serial port. This is much > better than converting a .DO file which can easily fill up RAM. If you > weren't lucky enough to get a Backpack before they sold out, here's how > I've been tokenizing on the fly: > > 1. On my Tandy 200: > LOAD "COM:98N1ENN" > 2. On my GNU/Linux box, hooked up via a NULL modem: > * (cat FOO.DO; read) > /dev/ttyUSB0* > 3. When the Model T says "Ok", > 1. On my PC, I hit *Enter* > 2. On my Tandy 200, I type: SAVE "FOO" > > This looks simple but the serial port handling for Linux is a bit funny. I > needed the *read* command because the port data was getting cut off as > soon as *cat* finished. Also, it is necessary to preconfigure the serial > port using *stty* to make sure it has the right baudrate, etc. I do that > once, in step 0 > > 0. Configure serial port the way the Tandy portables like. > *s* > *tty -F /dev/ttyUSB0 ixon ixoff stop ^S start ^Q -onlcr -icrnl eof ^Z > 19200* > > > Since that's a mouthful to type, I put all of the above steps in a shell > script, which also includes commentary on what the settings mean and > possible sources of errors. (Please see attachment). > > Of particular note for troubleshooting is that, if some of the data gets > transferred, but it is garbled or you get a ?DS ERROR, then the problem > is that your PC's serial port does not support "ON CHIP SOFTWARE FLOW > CONTROL". One solution is to buy a serial card or USB cable with an FTDI > chip in it. (Other companies make ICs that support on chip software flow > control, I even have a cheap Prolific 2303 device that does, but FTDI is > the only company I know of whose chips are supposed to always work. ) > > Of course, the simplest solution is to get a backpack once Birt has them > back in stock. > > —b9 > > P.S. Why on chip xon/xoff is needed: It took me a long time to figure this > out, but software flow control no longer works on most modern PCs. For > speed, serial ports use long FIFOs (buffers) which increases throughput at > the cost of latency. By the time the ^S character (XOFF == "please stop > transmitting") from the Model T gets to the PC, the PC will have already > written a lot of data that the Model T has to discard. > > > > On Wed, Jul 27, 2022 at 5:15 AM <bir...@soigeneris.com> wrote: > >> Supply chain issues still abound for all. We are working on trying to get >> some more Backpacks made. I think you could use this same idea for any sort >> of serial loading of programs. >> >> >> >> Jeff Birt >> >> >> >> *From:* M100 <m100-boun...@lists.bitchin100.com> *On Behalf Of *B 9 >> *Sent:* Wednesday, July 27, 2022 2:28 AM >> *To:* m...@bitchin100.com >> *Subject:* Re: [M100] Questions about tokenizing BASIC in UNIX >> >> >> >> What a nifty use of the Backpack's command line interface! I saw your >> YouTube on the Backpack last year and thought they looked intriguing. Did >> the supply chain issues ever get resolved? >> >> >> >> —b9 >> >
