Date   : Tue, 06 Jan 2015 23:53:56 +0000
From   : jgh@... (J.G.Harston)
Subject: Serial console active at power-on

John Kenyon wrote:
> Not sure if this would work on a Master though...

Works on the Master as as there was only ever a defined ReadVDUStatus 
call (OSBYTE &75), in order to do WriteVDUStatus loads and loads of 
software had by neccessity written directly to &D0, so &D0 became an 
official fixed VDU variable.

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