Date   : Mon, 13 Aug 2007 08:11:33 +0100
From   : pete@... (Pete Turnbull)
Subject: Emulating Econet hardware?

On 13/08/2007 05:03, Jonathan Graham Harston wrote:

> "There are two Z80-SIO options: the Z80-SIO/0 and the Z80-SIO/1...
> see figure C4-3
>  
> Figure C4-3:
>  
>   28 +<--RxDB
>   27 +<--RxCB    27 +<-- RxTxCB
>   26 +<--TxCB    26 +--> TxDB
>   25 +-->TxDB    25 +--> DTRB
>   24 +-->RTSB \              \
>                \              \
>                Z80-SIO/0      Z80-SIO/1    "
>  
> pC4-22, Zilog Device Datasheets, Adam Osbourne & Associates.

Then that's a misprint, and probably a very early copy of a datasheet if 
it only admits to two versions.  I have several Zilog datasheets, and 
the SGS data book, and they all disagree with what you wrote, and agree 
with what I wrote.  There are plenty of references on the internet too, 
if you look.  Besides, I've actually used Zilog SIO/2s (and SIO/0s).  I 
have a lump of conductive foam with 6 genuine Zilog ones in front of me 
right now :-)

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York