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Post by Jeff Ledger on Apr 2, 2007 17:21:48 GMT -5
I'm doing my own DIY Commodore keyboard interface for one of my projects. After searching the internet and not being able to locate a matrix listing of the actual hardware connections, I sat down with my ohm meter and mapped them myself. Here's a link to a zipped excel file if anyone else ever needs this info. You'll need support for an 8x8 matrix, and one more if you want use of the RESTORE key. (It's on separate lines) My current project will create a RS232 output device from a C64 keyboard. {figure this form is indexed by Google, so this is as good a place...} www.orrtech.net/propeller/ckeymatrix.zipJeff
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Post by Jeff Ledger on Apr 3, 2007 1:22:24 GMT -5
Here's a pic of my own version of C=Key. I wanted a very *retro* keyboard for my current project.. This version reads the Commodore keyboard and sends the data out to another chip (or terminal) at 4800 baud. (Yes the 64 board I stole the CN1 post from was DEAD..) (Got plans for it's SID chip soon too!) Jeff
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Post by Jeff Ledger on Apr 6, 2007 21:16:19 GMT -5
My hat is off to Jim Brain, the designer of the Original C=key!
You can't truly appreciate what goes into a hardware design until you attempt to replicate it yourself from scratch!
After days of banging my head against the desk, asking questions of Google and several good techies, my own version of this is working perfectly. I'll attach picaxe code and documentation when I get it my chicken-scratched notes into the computer.
If you need a Commodore keyboard interface that outputs at 4800 baud, this works great, but for everything else, bribe Jim to finish his!
jeff
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Post by gmoon on Apr 7, 2007 7:10:02 GMT -5
I'm doing my own DIY Commodore keyboard interface for one of my projects. After searching the internet and not being able to locate a matrix listing of the actual hardware connections, I sat down with my ohm meter and mapped them myself. Here's a link to a zipped excel file if anyone else ever needs this info. --- www.orrtech.net/propeller/ckeymatrix.zipCool project, Jeff! There is a keybd matrix map in "Mapping the Commodore 64" (in the book, anyway.) That matrix is mapped in CIA A & B port bit-order, so it doesn't match yours. Looks like your ref is pin-order; great stuff for hacking the keyboard hardware (with the lead colors, too.)
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Post by Jeff Ledger on Apr 7, 2007 21:24:40 GMT -5
I've learned the hard way this year that I *must* document my projects, or by next month I will NEVER remember what on earth I did. Here's a copy of my documentation for this project if anyone wants to duplicate the results. (Forest Mimms educational style ) www.orrtech.net/propeller/c=keyserial.pdfJeff
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