Date   : Wed, 07 Jan 2009 00:31:53 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Master Turbo ROM dump?

Jules Richardson wrote:
> Michael Firth wrote:
>  > it looks like we need an up-to-date central repository for this sort of
 
I've been trying to ensure http://mdfs.net/tube is as complete and
accurate as possible.
 
> I thought I'd make a start on properly "publishing" all of my copro-related
> stuff on the 'net - that was 30 mins ago, and time has been spent trying to
> locate my mis-filed Acorn Z80 ROM image, so I'm off to a cracking start ;-)
 
http://mdfs.net/tube/Z80/Client.rom ;)
 
> p.s. no idea why they only used the upper 2KB for the ROMs, but I see what
you
> mean - both flavours of 6502 external copros that I have are that same as
the
> 65C102 internal one - 0xff in the lower 2KB...
 
It is (was) easier to get hold of and interface to 4K EPROMs than
2K ones, and it leaves spare space for expansion or built-in
software. The Z80 CoPro code and CPM support fits into about 1.5K,
but the ROM has a handful of debugging tools as well that takes it
to about 3K.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
There are three food groups: brown, green and ice cream.