Re: Announcement: VIMM - VIC20 Megademo Released

From: Marko Mäkelä (
Date: 2000-12-22 12:14:47

On Thu, 21 Dec 2000, Carlsson, Anders wrote:

> The Oric (according to Jonathan Bristow, Twilighte) uses AY-3-8912.
> It has, like VIC-I, three square waves + noise, but each channel has
> 10 octaves (14 bit) compared to VIC's 4.5 (7 bits, overlapping).
> Each chananel has its own volume control or can be handled by an
> envelope generator with eight patterns. As my main area is music,
> I believe I can see a clear advantage here.

Oh yes, I forgot about the sound chip.  But I think that everything else
in the Oric hardware is inferior to the VIC-20.

> I really thought the ULA in Oric had hardware sprites, but it seems
> not. But maybe the difference in graphics capacities isn't there,
> it's just different way to address the graphics.

Imagine if the VIC-I didn't have any I/O registers in the $9000-$900f
range, and the only way to affect the video output would be by writing to
a fixed RAM area.  That would be roughly equivalent to the situation in
the Oric-1.


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