When I was accessing YOUTUBE. I saw a person use TTL BLUETOOTH module connected to a TRS 80 Model 100 controlling a WALL-E robot with M100 keyboard. Click the below link to see what I am talking about.
https://www.youtube.com/watch?v=SUclTa5wqcE John Martin On May 20, 2015, at 9:49 AM, Ken Pettit <[email protected]> wrote: Hey Mike, I suppose you could use serial port + Bluetooth to drive an 80x25 character display. But I wonder how slow it would be to do scrolling, etc. I was already worried about how slow a parallel port implementation would be relative to a true system bus connection. And I think the tricky part about what you said is the word "internal" as it relates to Bluetooth. Most people don't want to take their machines apart and take a soldering iron to them, myself included and I even have the skills to do it (or at least I tell myself I do ;) As far as the how, the SysROM has multiple RST 7 hooks for sending characters to the LCD. And it uses RAM variables to record the current screen dimensions (which are initialized to 40x8). Redirecting to anything other than the internal LCD (i.e. DVI system bus, parallel port, serial port, etc.) requires installing a relatively small .CO program and RST7 hooks to intercept the data going to the LCD. And BASIC has a WIDTH command for setting the width to either 40 or 80. But the WIDTH command will fail unless you have actually installed a RST7 hook to handle it. Ken
