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PostPosted: Sun Oct 13, 2013 6:56 pm 
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Joined: Mon Mar 25, 2013 9:26 pm
Posts: 183
Location: Germany
I finally hooked all parts together that I was planning for the first simple system.
It's using a W65C02, a AT28C64 eeprom, a 74HC138 for address decoding and a 6532 RIOT I got from Jameco some weeks ago.
Serial I/O is done with a MC6850 that is easy to connect to a 6502 bus and also easy to program.
The whole thing runs at 1.8432 MHz to use the main clock also for the serial clock. It's a bit to fast for the R6532, because it's the 1MHz version, but the system seems stable.

Now I need to write proper code for this thing and then it will be moved to a prototype PCB.

From now on I can truly say that I've build my own system from scratch. After nearly 30 years this idea has come to life. :mrgreen: :mrgreen: :mrgreen:

Mario.


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hw_setup.jpg
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PostPosted: Sun Oct 13, 2013 8:07 pm 
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Joined: Thu Dec 11, 2008 1:28 pm
Posts: 10971
Location: England
Great! You show it can be done!


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PostPosted: Sun Oct 13, 2013 8:20 pm 
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Joined: Thu May 28, 2009 9:46 pm
Posts: 8466
Location: Midwestern USA
mkl0815 wrote:
I finally hooked all parts together that I was planning for the first simple system.
It's using a W65C02, a AT28C64 eeprom, a 74HC138 for address decoding and a 6532 RIOT I got from Jameco some weeks ago.
Serial I/O is done with a MC6850 that is easy to connect to a 6502 bus and also easy to program.
The whole thing runs at 1.8432 MHz to use the main clock also for the serial clock. It's a bit to fast for the R6532, because it's the 1MHz version, but the system seems stable.

Now I need to write proper code for this thing and then it will be moved to a prototype PCB.

From now on I can truly say that I've build my own system from scratch. After nearly 30 years this idea has come to life. :mrgreen: :mrgreen: :mrgreen:

Mario.

Good job! Looks as though designing and assembly your unit was a real RIOT. :? :lol:

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PostPosted: Sun Oct 13, 2013 8:23 pm 
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Joined: Mon Aug 05, 2013 10:43 pm
Posts: 258
Location: Southampton, UK
Totally cool Mario. Same as me. :) Waited not quite 30, maybe 25 years to finally do it. Nearly cried when those LEDs starting flashing, the first time I applied power:

http://www.youtube.com/watch?v=TXWvmcBsQn0

Mine's a 6809, AT28C256 (own built EEPROM programmer), 6522, 6850, etc. Going to try integrating a AY 8192, so the baby can make some noises, next...

Makes a change from the day job of perl programming I'll say. ;)

Lawrence

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PostPosted: Mon Oct 14, 2013 7:42 am 
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Joined: Mon Jan 07, 2013 2:42 pm
Posts: 576
Location: Just outside Berlin, Germany
Congratulation from here, too! Now you need a sticker for your MacBook that says "My other computer only needs 128 bytes of RAM" :D .


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