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 Post subject: OMG it's alive!
PostPosted: Sat Oct 19, 2013 1:23 am 
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Joined: Mon Jan 07, 2013 2:42 pm
Posts: 576
Location: Just outside Berlin, Germany
I find this somewhat hard to believe myself, but the first prototype of the Übersquirrel is up and running. The wires are a mess, it's still missing a bunch of parts, but OMG I have actually built a working computer!

Attachment:
USq Prototype Working 20131018 1.jpg
USq Prototype Working 20131018 1.jpg [ 718.56 KiB | Viewed 785 times ]


As it stands, it's a WDC65c02 with 1.8 MHz, 32 kb RAM, 8 kb ROM (soon to be expanded to 16 kb), and a MC6850 for the serial port running at 28.800 baud (thanks, Mario!). I'll be adding the second ROM block and a VIA 65c22, do some more work on the OS, and then figure out how to wire wrap the final version.

Attachment:
USq Prototype Working 20131018 2.jpg
USq Prototype Working 20131018 2.jpg [ 271.52 KiB | Viewed 785 times ]


However, first and foremost: Thanks so much to everybody here in the forum who has been such great help the last few months and made this moment possible. I couldn't have done it without you guys. You're a great group of people.

Attachment:
USq Prototype Working 20131018 3.jpg
USq Prototype Working 20131018 3.jpg [ 293.7 KiB | Viewed 785 times ]


(Oh, and the cat -- black blob on the right -- helped, too, I guess, though my heart stopped briefly yesterday when she almost walked over the breadboard.)

And now I really, really have to take my very big smile to bed.


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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 3:39 am 
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Joined: Thu May 28, 2009 9:46 pm
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Location: Midwestern USA
scotws wrote:
I find this somewhat hard to believe myself, but the first prototype of the Übersquirrel is up and running. The wires are a mess, it's still missing a bunch of parts, but OMG I have actually built a working computer!

Break out the bubbly! It's always an immensely satisfying feeling of accomplishment when something into which you've put so much time and effort works on the first try.

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(Oh, and the cat -- black blob on the right -- helped, too, I guess, though my heart stopped briefly yesterday when she almost walked over the breadboard.)

Worse that her walking on it would be her...ah...er...relieving herself on it. :lol:

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File comment: "Christening" the computer.
puppy_on_laptop.jpeg
puppy_on_laptop.jpeg [ 51.78 KiB | Viewed 772 times ]

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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 9:07 am 
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Joined: Mon Mar 25, 2013 9:26 pm
Posts: 183
Location: Germany
Yeah, it's nearly impossible to describe the feeling if you turn it on and it works. Only a few characters in a terminal window generated by a bunch of wires making the world stop for a moment.
Congratulations for getting the Übersquirrel to life.

Mario.

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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 11:46 am 
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Joined: Mon Mar 02, 2009 7:27 pm
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Location: NC, USA
Congratulations! The first time is always special.
Good luck with the next chapter of WW. My recommendation is to leave what you have now alone, do not touch it! This way you'll have a reference to work from for the next stage.

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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 12:53 pm 
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Joined: Fri Sep 20, 2013 4:35 pm
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Congrats!!!


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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 2:28 pm 
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Joined: Wed Sep 11, 2013 8:43 pm
Posts: 207
Location: The Netherlands
Congratulations scotws!

I had the same feeling recently.
I can’t take it apart (yet)... :D

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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 6:26 pm 
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Joined: Wed Feb 13, 2013 1:38 pm
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Location: Michigan, USA
Way to go, scotws. Congratulations...


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 Post subject: Re: OMG it's alive!
PostPosted: Sat Oct 19, 2013 8:32 pm 
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Joined: Mon Jan 07, 2013 2:42 pm
Posts: 576
Location: Just outside Berlin, Germany
Thanks everybody. EE, I was actually clever enough to buy two of everything, so I can build the finished version in parallel. Really helps with the software, I'm getting to the limits of what I can do with the emulator (WAI for for the main routine will probably be the last straw). This is why the interrupt system will go in last. At least that's the idea.


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