[sdiy] Calculighter - was Re: NEC D936CT chip in my Muppet Babies keyboard

[Adam (synthDIY)]

Wow!
NASA could have really used these back in 1969...



> On 10 Jul 2023, at 9:13 am, Peter Pearson <electrocontinuo at gmail.com> wrote:
> 
> On the Casio end of things, does anyone have a schematic for the Casio QL-10 Calculighter?
> 
> https://www.calculator.org/calculators/Casio_QL-10.html
> 
> Saw something about it in a recent "Bad Gear" (no such thing) youtube video.  I want one...
> 
> On Sun, Jul 9, 2023 at 6:50 PM Adam (synthDIY) <synthdiy at adambaby.com <mailto:synthdiy at adambaby.com>> wrote:
>> Robin Whittle did a lot of investigating in the 1980s with a related chip found in Casios. Some of this may be of help.
>> 
>> <preview.png>
>> Casio-931-2006-06-17
>> Text Document · 90 KB
>>  <https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt>Casio-931-2006-06-17 <https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt>
>> Text Document · 90 KB <https://www.firstpr.com.au/rwi/casio/Casio-931-2006-06-17.txt>
>> 
>> 
>> and some background here
>> Modifications to Casio musical instruments from the 1980s
>> firstpr.com.au
>> 
>>  <https://www.firstpr.com.au/rwi/casio/>Modifications to Casio musical instruments from the 1980s <https://www.firstpr.com.au/rwi/casio/>
>> firstpr.com.au <https://www.firstpr.com.au/rwi/casio/>	 <https://www.firstpr.com.au/rwi/casio/>
>> 
>> 
>> A
>> 
>> 
>> 
>> 
>> 
>>> On 10 Jul 2023, at 4:51 am, Benjamin Tremblay via Synth-diy <synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>> wrote:
>>> 
>>> I cannot find any pinouts for this chip. 
>>> I pulled if off the board (very carefully for me). Now I am trying to guess which io pins scanned the keys and switches. 
>>> I can’t find a pinout for this chip anywhere. Octopart denies its existence. 
>>> Not the same chip as the Casio VL and PT series monophonic keyboards, but hopefully somebody got a bonus for cramming the VL-10 functionality into this 28 pin DIP.
>>> 
>>> Ben
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>> 
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