Re: GO64 tech stuff?

From: Marko Mäkelä (
Date: 2000-08-25 10:42:14

On Fri, 25 Aug 2000, Richard Atkinson wrote:

> I'm most intrigued. Perhaps there are hidden registers, something like the
> plus/4s TED registers.

My bet is that it's the "test mode" bit of the $d030 register (or was it
$d02f)?  That bit normally disables all VIC-IIe interrupts and blanks the
screen with a non-standard picture (it's flickering grey on my monitor).
If I remember correctly, it doesn't prevent memory refresh, though.  But I
guess that bit could be used to reset the VIC-IIe raster counter.

Has anyone read the article?  Is there some sample code?


This message was sent through the cbm-hackers mailing list.
To unsubscribe: echo unsubscribe | mail

Archive generated by hypermail 2.1.1.