Has anyone managed to reverse engineer this DVI? That would be a neat project.
~George > On Jul 25, 2018, at 9:30 PM, Randall Kindig <[email protected]> wrote: > > Thanks, Brian, that’s very helpful. > > Randy >> On Jul 25, 2018, at 1:12 AM, Brian White <[email protected]> wrote: >> >> Randy I never answered your last question about the Model 200 cable. >> >> It's these two items: >> >> https://www.amazon.com/gp/aw/d/B003PU1EVG/ >> >> https://www.amazon.com/Connector-Rainbow-Ribbon-Cable-1-6ft/dp/B00XP54YKE/ >> >> These are just representative examples pulled up quickly from amazon on my >> phone. You can get the same things lots of different places including ebay >> and digikey etc. >> >> That's it. You just stick the gender changer into one end and stick that end >> into the 102 or 200. >> >> For polarity assurance, just keep the cable flat all the way to the computer. >> >> That's it. No soldering, and the lack of polarity key on the computer end >> has an easy answer. And that cable works the same on both 102 and 200. >> >> I mean it can buch up or fold or loop any way it wants once it's connected, >> but just imagine both the DVI and the computer are sitting on a table, with >> the back of the computer facing the front of the DVI, and both boxes are >> sitting right-side up on their feet. From that starting position, the cable >> travels from under the front of the DVI to the computer without twisting or >> folding over. Whichever side of the cable is the bottom at the dvi, is also >> the bottom at the computer. If it was a grey cable instead of tha rainbow >> one, you could write "bottom" & "top" or "up" & "down" right on the cable at >> the computer end with a sharpie, and that would be enough for even an >> unsuspecting future owner to get it right safely. The DVI end is polarity >> keyed so you don't have to worry about that end. >> >> The only remaining annoyance with that cable is when you pull the cable out >> of the computer, the gender-changer pins are just as likely to stay in the >> computer as stay on the cable, and then they are a little difficult to get >> out of the computer because there is nothing to get a grip on. So you might >> want to use a tiny (tiny!) bit of super glue to keep the pins in the cable. >> Just enough to stick the two black plastic parts together, but try to avoid >> letting super glue wick and travel down into where the pins make contect >> inside the connector on the cable. >> >> Thanks to Mike Stein for the clue about the effect that kind of >> straight-through doulble-ended pin header ends up having on the pin mapping >> when you use one to butt two female idc plugs up to each other. It ends up >> having the same effect as the twists in the normal cable. >> -- >> bkw >> >>> On Tue, Jul 24, 2018, 8:10 PM Randall Kindig <[email protected]> >>> wrote: >>> I currently have 2. Until a few months ago I didn’t have any and had never >>> seen a working unit. Now I have 2 great working units. >>> >>> I allows the M100/102 to display on a monitor rather than the small LCD. >>> It also gives it one or 2 disk drives. They are great, if finicky. >>> >>> Randy >>>> On Jul 24, 2018, at 7:42 PM, Ken Gregg <[email protected]> wrote: >>>> >>>> >>>> I see one of these units up for auction on ebay right now: >>>> https://www.ebay.com/itm/Radio-Shack-Tandy-TRS-80-model-100-disk-video-interface/223062580269 >>>> >>>>> On 7/24/2018 12:25 PM, [email protected] wrote: >>>>> Oh! Well I've owned my M100 for years now and I had never seen the DVI. >>>>> Are these rare? What advantages does this give over a stock M100 with a >>>>> floppy drive? I gave a REX in mine, worth its weight in gold! >>>>> >>>>> Thanks for the replies guys, I still ashamed I didn't know what DVI was. >>>>> >>>>> Are these rare? Do many on the group have them? >>>>> >>>>> >>>>> >>>>> Sent from my iPad >>>>> >>>>> On 24 Jul 2018, at 8:12 pm, Kurt McCullum <[email protected]> wrote: >>>>> >>>>>> DVI = Disk Video Interface. It expanded the 100 or 200 with a 180k 5.25" >>>>>> disk drive and an external monitor. Attaches to the system bus and has >>>>>> it's own DOS. >>>>>> >>>>>> Kurt >>>>>> >>>>>> >>>>>>> On Tue, Jul 24, 2018, at 12:07 PM, [email protected] wrote: >>>>>>> Perhaps I missed the memo, but I'm not familiar with DVI. Other than it >>>>>>> being a firm video output. >>>>>>> >>>>>>> What is DVI in relation to the M100? >>>>>> >>>> >>> >
