Re: 8520

From: Nicolas Welte (
Date: 2000-08-03 15:56:11

Ethan Dicks wrote:
> I think the 8520 can be hooked to a faster bus (it's used in the Amiga, after
> all).  The TOD clocks are binary timers.  There may be some other subtle
> differences of which I am unaware.

Actually the Amiga bus is slower than the C64 bus, it runs only at about
800kHz (1/10 of the processor clock). Note that this is the E Bus as it is
called, this is the slow bus on the 68000 for old 6800 bus compatible
devices. This is why not all 8520 from an Amiga can be used in the
1570/71/81: they all need 2MHz components.

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