Re: reading vic20 or c64 column

From: Didier Derny <>
Date: Tue, 30 Jun 2015 17:22:09 +0200
Message-ID: <>
All the projects I found are using analog switch so I moved to this solution
I found 3 chips, this one is different

my goal is not to reinvent the wheel but to use my usual keyboard with 
my old machines
and avoid piecing holes in an old case to insert an usb connector

actually I'm looking for something more recent than the 8808ae but 
difficult to find 8x8  matrix DIL or PLCC

initially I was thinking to use a CPLD but they are more expensive and 
need a programmer

I'm not planning to produce a product but make the resources available
PCB from oshpark   arduino mini + hc05 from china (ebay) really cheap  
(mt8808ae from utsource) (if I dont find a smaller chip)
windows application available from a web site (with the source code)

(later standalone controller based on vinculum II)

On 30/06/2015 16:52, wrote:
> On 2015-06-30 16:21, Konrad B wrote:
>>      I have (somewhere - one of those little things that I am unable to find
>>      after moving stuff around) an implementation based on an Atmel and an
>>      analogue cross point switch IC. But I am quite sure it isn't Jim's work.
>>      So there is at least one more in the wild.
> Yes, Konrad. I think that's the one. I must have received it from Josef
> some years ago, shortly before things were moved.

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Received on 2015-06-30 16:00:08

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