[Coco] 80 column card like a real coco

[Brian Blake]

On 9/23/2013 10:11 AM, Luis Antoniosi (CoCoDemus) wrote:
> I plugged the 80 column card composite output into my sony PVM Green input
> and using sync on green I have this:
>
> https://twitter.com/RetroCanada76/status/382139358628704256/photo/1/large
>
> Now it looks like a Coco3 :)
>
> I'm finishing the os-9 driver, it is already working but this video chip
> has a weird memory wrap at the position 2000, different than any other
> wordpak driver I saw. Soon I'll finish it and publish a new video running
> nitros-9 level 1 like a coco3 :)
>
> This crt9128 has some nice features like block graphics mode, 60/50Hz
> selection and a fill mode, very useful for cleaning the screen or the line,
> only 6 bytes are sent to clear the entire screen or a full line. Also it
> has a nice smooth scroll for rolling up the screen. Gonna test it to see.
>
> I found new crt9128's from china costing around 6 bucks each. Gonna try
> them to see if they solve the overscan since this chip was a industry
> standard. I may have an early version of the chip.
>

That display looks really crisp and clean, Luis. Nice work!!!


Brian