On Fri, 4 Aug 2017 18:17:17 +0000 (UTC) Jan Vanden Bossche <[email protected]> wrote:
>Is there somewhere a description of how the DVI interface > works, and what signals (type & speed) come out (and where) of the > Model T ? And how they have to be interpreted ?Did you need to load > any software on the T to make it work, or was a simple screen 1,0 > enough ? Is there a general description of the workings of a DVI, > somewhere ? > I don't know the gruesome details, but the DVI connects via the expansion bus, and there is a RAM-resident "dos" that has to be loaded from somewhere to actually use the DVI. I know the DVI is a z80 box with, IIRC, a 1793 or 1797 FDC, and (probably) a 6845 (or clone) video driver. It wasn't developed at Tandy so is probably not just a Model 1 with a weird ROM. It writes disks that can be read by other retro machines, and the filesystem is *almost* the same as CoCo Disk BASIC (Microsoft FAT8). At one point I had my CoCo reading DVI disks (that were created by teledisk) but that was a long time ago. And that, I'm afraid, is everything I know about the DVI. ;-( Willard -- Willard Goosey [email protected] Socorro, New Mexico, USA I search my heart and find Cimmeria, land of Darkness and the Night. -- R.E. Howard
