# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1351551867 -3600
# Node ID 6621d6210f8d22ec138f9c34946d1d5ce91a1906
# Parent  5050f1bd14bba91bf86a14aa2e6c835c03995891
Added a note about increased component performance and bandwidth consequences.

diff -r 5050f1bd14bb -r 6621d6210f8d ULA.txt
--- a/ULA.txt	Mon Oct 29 22:55:13 2012 +0100
+++ b/ULA.txt	Tue Oct 30 00:04:27 2012 +0100
@@ -549,6 +549,27 @@
 Electron) and other system-specific functions. Since the location usage is
 generally incompatible, this region could be reused for other purposes.
 
+Increased RAM, ULA and CPU Performance
+--------------------------------------
+
+More modern implementations of the hardware might feature faster RAM coupled
+with an increased ULA clock frequency in order to increase the bandwidth
+available to the ULA and to the CPU in situations where the ULA is not needed
+to perform work. A ULA employing a 32MHz clock would be able to complete the
+retrieval of a byte from RAM in only 250ns and thus be able to enable the CPU
+to access the RAM for the following 250ns even in display modes requiring the
+retrieval of a byte for the display every 500ns. The CPU could, subject to
+timing issues, run at 2MHz even in MODE 0, 1 and 2.
+
+A scheme such as that described above would have a similar effect to the
+scheme employed in the BBC Micro, although the latter made use of RAM with a
+wider bandwidth in order to complete memory transfers within 250ns and thus
+permit the CPU to run continuously at 2MHz.
+
+Higher bandwidth could potentially be used to implement exotic features such
+as RAM-resident hardware sprites or indeed any feature demanding RAM access
+concurrent with the production of the display image.
+
 ULA Pin Functions
 -----------------