[Coco] Dragon32 with factory Daughterboard SAM chip

Tormod Volden lists.tormod at gmail.com
Thu Oct 31 17:02:01 EDT 2013


On Thu, Oct 31, 2013 at 4:50 PM, Phill Harvey-Smith wrote:
> Yep I have a Dragon 32 like it. The daughter board is Dragon Data PN48200,
> the extra circuit is a 74LS74 and a 74LS32. It appears to ensure that the
> changes to /HS and DA0 happen at co incident with the E clock (E is fed to
> the CLK pin of both flipflops).
>
> I have traced the schematic in Eagle and can post if anyone wants it.

Er, what do you think? :)

Would this reduce interference or instabilities of the image?

Cheers,
Tormod



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