Apple-1-HW/RC6502-Apple-1-Replica
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An expandable SBC-version of the Apple 1 computer, easy to get started with and lot of cool stuff that can be added to it!
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Unknown 2dda03be5e Reset circuit revision B 
Fixed floating inputs on hex inverter (needed when using HCT), added 74HCT74 in order to allow clock division by 2 and 4 (in case missing matching TTL quartz crystal or want even slower clock than stock).
2017-06-10 19:58:36 +02:00
Gallery Added pictures of working setup 2017-06-02 20:24:48 +02:00
RC6502 ATTiny Clock Changed crystal footprint 2017-06-09 00:01:35 +02:00
RC6502 CPU CPU revision B 2017-06-10 01:40:30 +02:00
RC6502 RAM RAM revision B 2017-06-10 17:50:00 +02:00
RC6502 Reset Circuit Reset circuit revision B 2017-06-10 19:58:36 +02:00
RC6502 ROM Moved JP5 pins to back of board, only want to solder wire across it and not actually mount pins. 2017-06-09 19:28:45 +02:00
RC6502 Serial IO Serial IO Revision B 2017-06-08 21:25:13 +02:00
RC6502 Video Adapter Added Video Adapter 2017-06-09 00:01:14 +02:00
.gitignore Exported files 2017-05-15 22:54:58 +02:00
LICENSE.md Initial commit 2017-05-14 21:05:26 +02:00
README.md Reformatted README, added links to each relevant module. 2017-06-02 20:59:40 +02:00

README.md

RC6502 Apple 1 Replica

I've been spending a lot of time lately working on extensions to the excellent RC2014 machine, check out the official web page at http://rc2014.co.uk if you're not familiar with it. Unquestionably, a lot of fun!

Armed with the knowledge from building that kit I decided to attempt to create one myself, lack of knowledge when it comes to circuit design and pcb layout aside shouldn't be a problem right? Not as long as you enjoy tinkering with stuff.

The RC6502 is that kit, and since I wasn't yet born at the time and therefore did not own one I decided to create a working replica of the Apple 1 computer. The original schematics are readily available on the Internet - as is also an excellent book on the topic; Apple 1 Replica Creation, Back to the garage by Tom Owad.

I've been documenting the build process of the various components on my blog at https://hvetebolle.blogspot.no/p/rc6502.html, but be warned that it's in my native language (Norwegian) so this might not be anywhere close to readable for most people.

RC6502 Computer

Modules

Like the RC2014 I've decided to keep things very modular with each card more or less doing one simple thing, easier to wrap ones head around as a beginner and much easier to understand - also a lot cheaper to upgrade or replace since you don't need to replace the entire thing. Note that I haven't decided on designing my own backplane, mainly because the RC2014-version works really well (see RC2014 tindie page for ordering) and I've already got it.

In order to use the RC6502 you'll need the following modules:

If you want your own fabricated versions of the modules in the form of PCBs to own and and assemble yourselves, there are quite a few options avaiable though I myself mainly use Seeed Studio since they are reasonably priced for us Europeans. Zip up the contents of each modules export folders and give them that to get an estimate - I've stayed within the least pricy tier so at the time of writing you'd end up paying 4.90 USD plus shipping per module.