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ABNielsen.com 6502 Single Board Computer R1
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This is a 6502-based complete single board computer intended to help during the global IC shortage. Why use new chips when you can reuse scrap?
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Complete hardware overview of R1:
< a href = "http://www.youtube.com/watch?feature=player_embedded&v=w5cA64xof2I" target = "_blank" >
< img src = "http://img.youtube.com/vi/w5cA64xof2I/mqdefault.jpg" alt = "Watch the video" width = "240px" height = "auto" border = "10" / >
< / a >
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Video about the wireless bootloader:
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< a href = "http://www.youtube.com/watch?feature=player_embedded&v=NABU7gQDtcs" target = "_blank" >
< img src = "http://img.youtube.com/vi/NABU7gQDtcs/mqdefault.jpg" alt = "Watch the video" width = "240px" height = "auto" border = "10" / >
< / a >
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Check out the NEW project on HackADay if you want to read more and see some pretty pictures :)
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https://hackaday.io/project/184725-abn6502-sbc-r1
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For R1 I got rid of the Padauk MCU without increasing the chip count!
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Build instructions:
1) Send gerber files from /hardware to your favorite board house
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2) Build the project using assemble.sh - this will also try to burn the main ROM using Minipro. Dependencies: [CC65] (https://github.com/cc65/cc65) and a way to burn the ROM's.
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3) Source the IC's - the spirit of this project is to contribute as little as possible to the global IC shortage and get used chips locally or from Ebay/AliExpress/etc.
4) Burn the ROMs. I use a TL866II Plus variant for the actual ROMs.
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5) Solder away
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6) For the PS/2-keyboard I use Ben Eater's (a.k.a. Dieter Müller's) interface: https://www.reddit.com/r/beneater/comments/mjeilv/keyboard_interface_diagram/
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7) Enjoy!
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Optional:
Setup SSH keys with a Raspberry Pi, connect an nRF24L01+ compatible module to it and compile the wireless bootloader code in /software_linux
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License: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) https://creativecommons.org/licenses/by-nc/4.0/
