Re: Weird PCB attached to C64 ROM

From: Jim Brain <>
Date: Sun, 19 Feb 2012 15:07:15 -0600
Message-ID: <>
On 2/19/2012 2:24 PM, wrote:
> Hallo Craig,
>> ... it appears to have both J/(P?)iffy Dos
I'm mainly interested in the circuit board on the ROMs and how it 
selects a bank.  The cap/resistor imply a timer of some sort, like a 555 
rigged into a one shot mode, but not sure.


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Received on 2012-02-19 22:00:09

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