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NeXT Laser Printer Hiding a nonADB Keyboard Controller?

 
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barcher174



Joined: 07 Dec 2012
Posts: 610

PostPosted: Mon Nov 26, 2018 8:17 pm    Post subject: NeXT Laser Printer Hiding a nonADB Keyboard Controller? Reply with quote

This is one of my more interesting discoveries IMO. Inside the next laser printer is a nonADB keyboard controller chip!

As it turns out next must have dual purposed the same package for different applications.

Here is a comparison of the N4000 monitor sound board along with the interface board from a laser printer:



Here is the keyboard controller hacked into my nosoundADB board and tested to work stand alone:


Cool huh?
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cubist



Joined: 20 Sep 2007
Posts: 251
Location: Cambridge, MA

PostPosted: Tue Nov 27, 2018 10:45 pm    Post subject: Reply with quote

Mask-programmable controller? Looks to be part of the Sony universe (but fabbed by Motorola).
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barcher174



Joined: 07 Dec 2012
Posts: 610

PostPosted: Wed Nov 28, 2018 1:49 am    Post subject: Reply with quote

It could be. I'm thinking it's likely custom silicon. The keyboard itself uses an IC labeled S38DC007PP01
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Rob Blessin Black Hole
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Joined: 05 Sep 2006
Posts: 694
Location: Ft. Collins, Colorado

PostPosted: Wed Nov 28, 2018 11:50 pm    Post subject: Reply with quote

Hello: It looks like it was available for sale here at some point SON875901427https://encompass.com/item/1737586/Sony/8-759-014-27/ Is it programmable like a ROM?

Can I pull info off of one with my Rom burner?
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cubist



Joined: 20 Sep 2007
Posts: 251
Location: Cambridge, MA

PostPosted: Sat Dec 01, 2018 12:02 am    Post subject: Reply with quote

If mask programmed, unlikely. But it will probably have a simple function. Another reverse engineering project...
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