Date   : Mon, 16 Feb 2015 10:25:44 +0000
From   : jgh@... (J.G.Harston)
Subject: Acorn Z80 2p on Terasic development boards

John Kortink wrote:
> Some of you may be aware of my Acorn 6502 Second Processor
> implementation for several Terasic development boards (DE1,
> DE0 Nano and Cyclone V GX Starter Kit). Today it is joined
> by the Acorn Z80 Second Processor.

Wow. Well done.

There are a couple of bugs in the Z80 Tube Client that can get in the 
way of things working properly. I have a patched version at 
http://mdfs.net/Software/Tube/Z80 that fixes these:

* OSWORD transfer lengths correct for 5, 14, 15 so will function 
correctly with a Master host
* Checks ROM type is exactly 8 instead of 8-15.
* Executed code entered with the stack correctly balanced
* Error messages have the correct error number

I've been squirreling away coding for a 6809 CoPro, and John's patch to 
ARM BASIC to give it a 6809 assembler has been very useful: 
http://web.inter.nl.net/users/J.Kortink/home/software/basic6809/index.htm

-- 
J.G.Harston - jgh@...      - mdfs.net/jgh