Re: about the plus4

From: Gerrit Heitsch <>
Date: Thu, 19 Apr 2012 17:54:36 +0200
Message-ID: <>
On 04/19/2012 02:53 PM, Anders Carlsson wrote:
> When it comes to a replacement for the aging VIC-20, Commodore already
> had a 40 column chip 6562/63 in development but apparently it never saw
> its way into production.

 From what I read that chip was working, but needed rather expensive 
SRAM since it used the 'no badline' approach of the original VIC. That 
meant 2 memory cycles per 8 Bits displayed.

I could be mistaken, but I think the 6567 was the first VIC that used 
DRAM, everything before used SRAM, mostly 2114s and later 6116s. Look up 
their price at that time.


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Received on 2012-04-19 16:00:14

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