Date   : Mon, 30 Jan 2017 10:46:51 +0100
From   : kortink@... (John Kortink)
Subject: Acorn 6502 and Z80 2p on Terasic development boards

On Mon, 30 Jan 2017 08:45:40 +0000, nicola giacobbe <nicolagiacobbe@...>
wrote:

>Thanks John,
>
>just out of sheer curiosity: how hard would it be to convert the 6502 second
processor running on a ICE 40 Lattice FPGA?
>
>The open source development tools for the ICE40 are only Verilog based but
I suppose this not being a problem.

There are tonnes of development boards it could be ported to. They
are as varied and ubiquitous as Linux-running-on-ARM boards. Pick
your flavour of the month.

The requirements (if you want low effort, top speed) are two-fold :
does the board have (enough) cells and fast RAM, and can it be
easily hooked to the Tube (via a TubeSilencer or similar level
shifter). Most boards (certainly nowadays) have the cells. Some
don't have the RAM. A lot have too few or awkward GPIO (requiring
additional connector and cable alchemy).

I port my designs to boards I happen to have myself (for various
reasons). I'm not particularly interested in porting to all boards
under the sun. Unless I'm given a nice one (then I might go and see
what I can do :-)).


John Kortink