6502 Expansion Board for Z80 Homebrew

Alasdair Allan writes on Hackster.io:

6502board.png

A 6502-Based Expansion Board for a Z80-Based Homebrew Computer

Up till now I haven’t seen a 6502-based board, and now I’m seeing both at once—a 6502-based expansion board for a Z80-based homebrew computer.   Ben Chong, over at Ancient Computing, has done a lot of work around Spencer Owen’s RC2014 Z80 microcomputer kit, including designing an improved Z80 processor card and a 16550 UART board.

rc2014_6502

the 6502-based CPU board he’s put together is by far the most impressive. On his site Ben outlines his design process, and deep dives into how he got a 6502-based card to talk to a Z80-based system. This isn’t a trivial feat as the two processors have very different design philosophies—with the 6502 using a strict synchronous bus, and the Z80 using a loosely asynchronous bus. He then talks about software before doing some crude performance testing.

The hardware design files are available on GitHub:

ancientcomputing/rc2014

Screenshot from 2017-08-28 01-38-11

ancientcomputing has also shared many projects on OSH Park:

eb4249df5cf14029b95feea42fcc3f70.png

6502 Expansion Board for Z80 Homebrew

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s