Date   : Fri, 26 Aug 2011 23:12:44 GMT
From   : jgh@... (J.G.Harston)
Subject: Tube ROM

Rick Murray wrote:
>    Amstrad CPC   Can almost match the Beeb, with 640x200, but it is a
>             two colour display, essentially a MODE 0.

The Amstrad CPC screen system is identical to the BBC's, other than
the fact that they are all 16K modes: 80x25x2, 40x25x4, 20x25x16.
The Amstrad's MODE 0, 1, 2 are 25-line versions of the BBC's MODE
2, 1, 0.

It uses the same 6845 and the same pixel bitmap. The only
difference is the addressing which steps by 2048 for each pixel
line instead of 1 on the BBC and steps horizontally by 1 instead of
8.

-- 
J.G.Harston - jgh@...      - mdfs.net/jgh
...and Brutha said to Simony, "Where there is darkness we will make
a great light"