Update README, mainly changes about memory use.
diff --git a/README.md b/README.md
index 50e85ae..7735a39 100644
--- a/README.md
+++ b/README.md
@@ -113,12 +113,16 @@
Contiki uses the space usually reserved to BASIC, from &100 to &3700, for its
kernel. Since the Firmware and AMSDOS reserve all memory from &A700 up, this
-leaves about 28K of free RAM for applications. Not bad, but we can do better.
+more than 29K of free RAM for applications. Not bad, but we can do better.
+
+Current memory usage (with memstats.prg + desktop.prg running):
+* Heap size: 29188 bytes
+* Free memory: 24171 bytes
Firmware-based CTK driver
-------------------------
-The screen driver is using the standard "conio" driver from Contiki. This is a
+The screen driver is based on the standard "conio" driver from Contiki. This is a
textmode based driver which is easily portable between different terminal types.
However, the interface of this driver with the CPC firmware results in rather
slow screen drawing. The main reason is that some operations (such as erasing
@@ -127,11 +131,11 @@
code is written in C, and replacing it with an assembler version would provide
another speed boost.
-Some extra features such as bitmap icons, a custom character set and more can
+Some extra features such as a custom character set and more can
be implemented here (work on this was already started and you can use custom
icons now).
-The default driver is also designed to use 2 color per character, out of 16.
+The driver is also designed to use 2 color per character, out of 16.
The mapping to the CPC 4-color screen is suboptimal. A native driver could
make better use of the 4 colors.