Hi everyone I thought I'd reply to this one and reply to MikeS at the same time.
Again sorry for the double post, I was tired and using my phone, always a bad combination. So MikeS has a 2ft long cable, I'm not sure if this is shielded or not. Mike can you let us know? Brian, yes my cable did come from Arcadeshopper, it's a lovely cable, though I'll be honest I'm not sure how much I trust myself before bending a pin on that connector :-P The home made cable that came with the DVI kept dropping connection, as I have a replacement I don't feel so bad about experimenting with it. My plan was to chop the IDC connector off the end and solder a new length of cable to it. MikeS has set the bar with his 2 foot long cable, mine shouldn't be that long but it will have a join in it and my experience is that where ever you solder two wires together, you get a drop. Whether it is enough to upset communication between computer and DVI is something I guess I'm going to find out. On Thu, 12 Mar 2020 at 16:46, Mike Stein <mhs.st...@gmail.com> wrote: > The original genuine cables *were* (partially) shielded, although probably > more for RFI prevention than signal integrity: > > > ----- Original Message ----- > *From:* Brian White <b.kenyo...@gmail.com> > *To:* m...@bitchin100.com > *Sent:* Thursday, March 12, 2020 12:01 PM > *Subject:* Re: [M100] DVI cable length > > I saw the post, I just didn't know an answer better than "easy enough to > just try it" which is not all that helpful, but I guess at least then you > would have known your post posted. > > Although part of the cable has special wiring and connectors, once you > have a proper cable, it doesn't require anything special to add an > extension to the DVI end of it. > > I'm actually already amazed that a raw system bus going out over an > unshielded ribbon cable works at all, but I guess the DVI came enough years > after the Model 1 expansion interface debacle that they learned how to do > that better. ;) > > If you got a new cable from Arcade Shopper I probably built it. > > I haven't tried any long runs or done any reliability testing to find the > longest run that not merely appears to work, but is definitely safe from > corruption. You don't want data you can't trust, and I don't know, and > wouldn't want to rely on, how much fancy error detection and correction is > going on at low levels. Like does every block written or read from the disk > come along with a checksum? Until I knew that, I would want that bus to be > as clean as possible. > > -- > bkw > > On Thu, Mar 12, 2020, 11:04 AM James Zeun <james.z...@gmail.com> wrote: > >> >> Hey everyone >> >> Think I might have messed up messaging the list last night, so I'm >> sending my post again. My apologies if it did go through. >> >> Just a quick question, how long can a DVI link cable be? My new cable >> arrived today and while it's longer than what I had, I could still do with >> it being 20-30cm longer. I have the DVI sitting at an angle to the left of >> me on the desk, with my TV/Monitor flatscreen sitting on top of it. Using >> the new cable, it seems the intended way to use the DVI is with the M100 >> sat directly in front of it. However that isn't really comfortable nor >> practical with my setup, neither do I really want the monitor directly >> facing me. I regularly clear the center of my desk for soldering which is >> why the monitor sits in the corner out the way. >> >> I did get a home made cable with my DVI and while it is rather short >> (25cm), I'm wondering if I couldn't extending it another 30cm so the M100 >> can sit in front of me and the DVI to the side. >> >> As always any and all input is welcome, I'm probably going to give it a >> shot either way. I just thought I'd see if anyone new if there was a limit >> before signal loss is to much. >> >> Cheers >> James >> -- >> My retro tech blog and general ramblings >> http://bytemyvdu.wordpress.com/ >> > -- My retro tech blog and general ramblings http://bytemyvdu.wordpress.com/
