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 Post subject: 6502 + Breadboard = ?
PostPosted: Sat Mar 02, 2013 2:03 am 
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Joined: Wed May 30, 2012 7:45 pm
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Location: Dallas, TX
I have been working on some breadboarding projects. Suffice it to say, I've spent the last 5 years
learning programming and software. I'm at the point to where I want to explore circuitry.

I have some books and an Atmel 13a 8 bit cpu. Since its memory is flash, it will be easy to work with.

But, I love the 6502 for obvious reasons.

Does anyone have any simple circuit diagrams for beginner projects? I guess I will have to use an EPROM to program the chip?

It's hard because the 6502 is so old, there aren't current guides available. Do I need to shop for
a 1970s / 80s book or something?

Thanks guys

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PostPosted: Sat Mar 02, 2013 2:57 am 
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Joined: Fri Aug 30, 2002 1:09 am
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Location: Southern California
6502 Primer: Build Your Own 6502 Computer
http://wilsonminesco.com/6502primer/index.html

The URL above is the index page to the set of web pages covering the whole range of building aspects and a little beginning programming. The last page, circuit potpourri starts with a whole-computer schematic for a very basic 6502 computer similar to this one I designed for a product in 1993 which we sold for about 14 years for a high-end intercom for private aircraft:
Image

(The ROM is on the back.) You will need a programmer of some sort, but it's easier to make one for EEPROM than for EPROM if you don't want to buy one. My first one was home-made.

Although the 6502 is so old (as you put it), it is probably better supported than any other processor available today, and is still being made-- in huge volumes (hundreds of millions of units per year, although they're rather invisible, being at the heart of custom control ICs and not in desktop computers).

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PostPosted: Sun Mar 03, 2013 5:27 am 
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Joined: Thu May 28, 2009 9:46 pm
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GARTHWILSON wrote:
Although the 6502 is so old (as you put it), it is probably better supported than any other processor available today, and is still being made-- in huge volumes (hundreds of millions of units per year, although they're rather invisible, being at the heart of custom control ICs and not in desktop computers).

Heck! I'm very old but still functional. :lol:

Not only is the 6502 (65C02, actually) being produced in enormous quantities as part of an ASIC or other custom device, quite a few are in heart defibrillators. If you know someone who has an embedded defib unit and has had his life saved by it, he was most likely saved by that ancient 65C02.

BTW, the 65C816 is also used in huge numbers, again mostly as part of a custom ASIC.

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