[Coco] Program for test pattern for crt alignment/convergence?

[Don Barber]

Richard, thanks so much!  This exactly what I needed!  The new tube is 
looking fantastic now.

Don

On 8/8/22 15:54, Richard Goedeken via Coco wrote:
> Here is something that I wrote a few years ago for exactly this purpose:
>
> https://www.fascinationsoftware.com/media/Coco3_RGB_Monitor_Test_v1.0.zip
>
> There is a README basic program included.
>
> Richard
>
>
> On 8/8/22 09:28, Don Barber via Coco wrote:
>> Hi folks, acknowledge I'm sending a lot to the list recently but I 
>> got a lot of projects going on.
>>
>> I'm replacing the tube of a Commodore 1084S-D1 when the old crt tube 
>> 'let the vacuum out.'
>> I've got it aligned pretty close by eye but to get it exact I'd like 
>> a proper test pattern, like white-on-black grid lines to get it just 
>> right. I've already soldered up the cable to get this monitor working 
>> on the coco so was hoping to be able to generate such a test pattern 
>> from the coco.
>>
>> As such, anyone know of a coco program to generate decent test 
>> patterns, specifically a grid / cross-hatch pattern?
>>
>> I found Coco Color Bars ( 
>> https://colorcomputerarchive.com/repo/Disks/Demos/Coco%20Color%20Bars%202020%20(Jason%20Reighard).zip 
>> ) which is awesome - but still looking more for the grid test 
>> pattern. Figure I could probably whip something out in basic without 
>> much effort but thought maybe someone would know of an existing one?
>>
>> Alternatively I could probably get a CGA cable together to hook up 
>> this monitor to an early PC if someone has an early dos program to 
>> generate a test pattern.
>>
>> Don
>>
>>
>