I have a few bugs to sort out. DVI works in an interesting way. MENU is always on the LCD. So, one goes into BASIC, issues SCREEN 1 command to use DVI. Then, as I understand it, to get to TEXT you would first go to MENU (on LCD), select TEXT and automatically be back to DVI again. I have a bug to sort out for returning to MENU.
BTW, VT100 is 80x24. DVI was 80x25. So, I think that is another minor difference.. only 24 lines supported. Potentially we could go 80x36 though... apparently this is possible with VT100. Steve On Tue, Apr 14, 2020 at 4:54 PM Philip Avery <[email protected]> wrote: > Good going, Steve. This will be so cool in native M100 mode, we've been > waiting decades for a low cost & low footprint solution to give us 80x24. > Have you got TEXT working yet? > > Philip > > On 15/04/2020 2:44 am, Stephen Adolph wrote: > > update: > Towards the goal of a next-generation video solution for M100, I have some > progress to share. > Recall this thread where I suggest that the "Geoff VT100 adapter" as the > hardware to focus on. > > First, I have a "beta" VT100 driver solution, which is closely based on > Microsoft Disk-Basic (minus the disk stuff). > While still buggy, I can now drive the VT100 board, and attached VGA > monitor from BASIC. > > Secondly, in order to really support M100, the software component in the > VT100 emulator board needs to be extended. I'm working on that. This does > imply that the "Geoff VT100" board, as it was originally designed, won't > work perfectly for M100. But, I'll post the updated software image so > anyone with this board already can update their board. > > I'll keep posting updates as this progresses. > > Steve > > > On Sun, Apr 5, 2020 at 8:41 AM Stephen Adolph <[email protected]> > wrote: > >> As some of you may recall, it is fairly straightforward to access an >> 80x24 screen in CP/M through the use of the M100 serial port, and an >> external VT100 emulator. >> >> This device: >> http://geoffg.net/terminal.html >> >> is a great example of how to connect a modern VGA flat screen display to >> the M100. However, this exact design isn't really convenient, as the >> serial data has to be connected with a custom cable. (see the little white >> 4 pin header). >> >> I've decided to make a variant of this design that has a DB-9 connector >> on it, for serial data, so that it can be easily connected to the M100. >> >> I'll be making kits available for this design, and the price will be 30$ >> US. Hopefully by making this affordable and easier to connect, this can >> become the defacto solution to 80x24 display! >> >> This solution will work with CP/M right away, but the next task will be - >> how to use this solution with Model T natively. This will take some >> software work. A port of the "DVI software" to leverage serial >> communication to the VT100 adapter is one way to do this. >> >> This solution is also compatible with the "BCR serial port" modification >> which allows for serial data transmission at up to 120kbits/sec. A nice >> solution to exernal video that frees up the real RS-232 port of the laptop >> for comms. >> >> I'll be updating the REX wiki with some information on this. Kits aren't >> ready just yet. I'm waiting for my boards to arrive. >> >> cheers >> Steve >> >> >> >
