[Oberon] FPGA - Display.CopyBlock()

Tomas Kral thomas.kral at email.cz
Thu Sep 27 12:59:10 CEST 2018

On Mon, 3 Sep 2018 09:13:50 +0200
Tomas Kral <thomas.kral at email.cz> wrote:

> `Display.CopyBlock()' is primarilly used to scroll viewer text
> up/down.


I am experimenting with vertical scroll, I have added extra case just
for scroll viewer up/down. In 4-bit colour, when 4 times more data
needs to be moved around, I have observed the viewer is erased before
scroll up, while it is not erased when scrolled down, why?

Tomas Kral <thomas.kral at email.cz>

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