Re: has anybody tried to replace a vic or vic II chip with a board containing a propeller ?

From: Gerrit Heitsch <>
Date: Mon, 27 Feb 2012 20:46:11 +0100
Message-ID: <>
On 02/27/2012 08:13 PM, Nate Lawson wrote:
> On Feb 26, 2012, at 12:02 PM, Gerrit Heitsch wrote:
>> I think one would need a CPLD or the like to emulate a CIA or VIC and with both you'd have to be cycle-exact since even the one cycle difference between the 6526 and 6526A tripped up some software.
> Yes, microcontrollers aren't fast enough and you'd be wasting a lot of power busy-waiting on signals.

Well, compared to the NMOS-Chips from back then, most microcontrollers 
would be power savers, even when running polling loops. According to the 
data sheet, a 6567 VIC eats close to 1.5W (200mA @ 5V, 40mA @ 12V).


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Received on 2012-02-27 20:00:57

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