[vcf-midatlantic] replacing mono display DEC Rainbow

william degnan billdegnan at gmail.com
Wed Apr 19 18:34:35 EDT 2017


On Wed, Apr 19, 2017 at 12:07 PM, william degnan <billdegnan at gmail.com>
wrote:

>
>
> On Wed, Apr 19, 2017 at 11:54 AM, Ian Primus via vcf-midatlantic <
> vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
>
>> The cable to the VR201 is very, very simple. It contains monochrome
>> composite video, and the direct passthrough for the keyboard lines.
>>
>> You can make up an adapter to allow you to use a standard monochrome
>> composite monitor and the LK201 keyboard.
>>
>> Pin 12 - monochrome composite video signal
>> Pin 4 - video shield ground
>>
>> Pin 5 and 6 - ground
>> Pin 7 and 8 - 12V
>> Pin 14 - RX data keyboard
>> Pin 15 - TX data keyboard
>>
>> See here for the pinout of the LK201 keyboard:
>> http://www.netbsd.org/docs/Hardware/Machines/DEC/lk201.html
>>
>> You can rig up this adapter and use any normal monochrome composite
>> monitor with the Rainbow. Best results on quality monitors with
>> adjustments for height, it'll overscan on some things like security
>> monitors. Likewise, it's real easy to rig up the VR201 to work on
>> anything else, it's a fantastic, sharp, clear little monitor. The
>> screen rot can be fixed, I've done a few CRTs like this. You basically
>> need to remove the tube, heat the faceplate very carefully with a heat
>> gun to get it to delaminate, clean all the gunk out, and stick it back
>> together.
>>
>> -Ian
>>
>>
>
OR...just use a color Rainbow monitor in monochrome mode..yay.  Problem
solved.  Now to install a graphics card.

Bill

>
>



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