1.1 --- a/ULA.txt	Mon Oct 29 22:55:13 2012 +0100
     1.2 +++ b/ULA.txt	Tue Oct 30 00:04:27 2012 +0100
     1.3 @@ -549,6 +549,27 @@
     1.4  Electron) and other system-specific functions. Since the location usage is
     1.5  generally incompatible, this region could be reused for other purposes.
     1.6  
     1.7 +Increased RAM, ULA and CPU Performance
     1.8 +--------------------------------------
     1.9 +
    1.10 +More modern implementations of the hardware might feature faster RAM coupled
    1.11 +with an increased ULA clock frequency in order to increase the bandwidth
    1.12 +available to the ULA and to the CPU in situations where the ULA is not needed
    1.13 +to perform work. A ULA employing a 32MHz clock would be able to complete the
    1.14 +retrieval of a byte from RAM in only 250ns and thus be able to enable the CPU
    1.15 +to access the RAM for the following 250ns even in display modes requiring the
    1.16 +retrieval of a byte for the display every 500ns. The CPU could, subject to
    1.17 +timing issues, run at 2MHz even in MODE 0, 1 and 2.
    1.18 +
    1.19 +A scheme such as that described above would have a similar effect to the
    1.20 +scheme employed in the BBC Micro, although the latter made use of RAM with a
    1.21 +wider bandwidth in order to complete memory transfers within 250ns and thus
    1.22 +permit the CPU to run continuously at 2MHz.
    1.23 +
    1.24 +Higher bandwidth could potentially be used to implement exotic features such
    1.25 +as RAM-resident hardware sprites or indeed any feature demanding RAM access
    1.26 +concurrent with the production of the display image.
    1.27 +
    1.28  ULA Pin Functions
    1.29  -----------------
    1.30