Brian, thanks so much for the detailed information!
Randy
> On Oct 16, 2017, at 10:00 PM, Brian White <[email protected]> wrote:
>
> Well since no one answered any better, what I gather from the various manuals
> available on-line, my own dvi which came with a hand-made cable for Tandy102,
> and pictures of another hand made cable for 102 on ebay once a couple years
> ago...
> (I don't have a cable for Model 100, and have not yet actually built and
> tested this for Model 100)
>
> Parts (For Model 100 or 200, but not 102):
> * One 40pin dip idc connector like this:
> http://www.king-cart.com/cgi-bin/cart.cgi?store=phoenixent&product_name=HWS15322
>
> <http://www.king-cart.com/cgi-bin/cart.cgi?store=phoenixent&product_name=HWS15322>
> or
> http://www.ebay.com/itm/162482138557 <http://www.ebay.com/itm/162482138557>
>
> * One regular 40pin female idc connector, with polarity notch and
> strain-relief
> http://www.king-cart.com/phoenixent/product_name=HWS1877
> <http://www.king-cart.com/phoenixent/product_name=HWS1877>
>
> * 20 inches of 40pin ribbon cable.
>
> Assembly:
> * Crimp the cable in the dip connector such that if you are looking at the
> dip connector with the #1 pin top-left and pins pointing away from you, the
> cable exits to the right, red stripe on top.
>
> This last part I'm not 100% sure about for Model 100 only because I haven't
> actually tried it.
> For a 102, I do know you have to take one end of the cable (doesn't matter
> which), and peel the conductors apart into 20 pairs, and flip each pair over
> before crimping the idc connector together.
> For a 100 or 200, I think you just run the cable straight through.
>
> The dip idc connector that goes in the 100 does not connect pin X to the same
> conductor Y as regular idc connectors.
> A regular idc connector connects pin 1 of the connector to conductor 1, and
> pin 40 to conductor 2.
> The dip idc connector reverses that. Pin 1 goes to conductor 2, pin 4 goes to
> conductor 1.
> I think the only reason you have to swap pairs over on a Model 102 cable is
> because they designed the pinout in the DVI so that a simple straight cable
> would work to a model 100 (same way they did for the printer port on the
> m100), and so to connect a 102, you have to artficially mimic the flipped
> pinout of the dip connector. Reference, "Style 2" from this drawing:
> https://media.digikey.com/Renders/Assmann%20Renders/partnumber%20breakdown%20Assmann.jpg
>
> <https://media.digikey.com/Renders/Assmann%20Renders/partnumber%20breakdown%20Assmann.jpg>
> "pin #1 on connector is connected to 2nd conductor on cable"
>
> I mean, I know for sure what a regular idc connector does, and what these dip
> idc connectors do, and what a working cable for a 102 looks like, and so from
> those I am deducing what the 100 cable must be.
>
> * Arrange the cable on the 40 pin idc female connector such that the end of
> the cable ends on the side of the connector with the polarity notch, and the
> cable extends away from the connector on the side opposite the polarity
> notch. Crimp the cable. Then fold the cable back over the top to snap on the
> strain relief clip. Now the cable is going the same direction as the key
> notch.
>
> References:
> * http://tandy.wiki/Disk/Video_Interface
> <http://tandy.wiki/Disk/Video_Interface>
> o Pictures of ebay cable, the original ad sold it as a T102 dvi cable. My
> own t102 cable is made a different way, but wired the same.
> o User manual page 9 (pdf page 13)
> o Service Manual figure B-1 system bus pinout
> * ftp://ftp.whtech.com/club100/doc/m100ServiceManual.pdf
> <ftp://ftp.whtech.com/club100/doc/m100ServiceManual.pdf>
> o figure 4-3 system bus pinout
> *
> https://www.digikey.com/product-detail/en/assmann-wsw-components/H0PPH-1006G/H0PPH-1006G-ND/1000156
>
> <https://www.digikey.com/product-detail/en/assmann-wsw-components/H0PPH-1006G/H0PPH-1006G-ND/1000156>
>
> --
> bkw
>
> On Sun, Oct 15, 2017 at 11:23 PM, Randall Kindig <[email protected]
> <mailto:[email protected]>> wrote:
> Does anyone have a cable for connecting the M100 to the DVI box (for
> composite monitor hook-up and disk drives)?
>
> Does anyone have information for making one? I know that Ian Mavric was
> looking into making a cable for this great M100 accessory, but I thought I
> would ask the list.
>
> thanks
>
> Randy
>
>
>
