How easy is it to damage an IBM CGA display?

Liam Proven lproven at
Thu Nov 29 11:25:44 CST 2007

On 29/11/2007, Richard <legalize at> wrote:

> Its not an urban legend.  The issue was that there was a sync register
> (horizontal sync, I think) for which you could poke in a zero value.
> That's what I recall anyway, although I can't dredge up anything by
> google at the moment.

Surely this is a variant on the legendary HCF operand?

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