Some additions to the README file

README.md

@@ -1,12 +1,15 @@
-# Tridora
-- the Tridora CPU and the Tridora System
-- creating everything from the ground up (except soldering stuff)
-- make it useful, but as simple as possible
+# Tridora System
+Tridora is a homebrew CPU written in Verilog and a matching software environment,
+including a Pascal compiler and assembler.
+Everything was created from the ground up (except soldering stuff).
+Everything is as simple as possible while still being reasonably useful.
+Everything is open source, so you can read, understand and modify the whole system, hardware and software.
 
 ## Overview
 - Homebrew CPU
-- Verilog/FPGA SoC
+- Verilog FPGA SoC
 - 32-bit word-oriented stack machine architecture
+- running at 83 MHz on an Arty-A7 board with four clocks per instruction
 - has its own instruction set architecture, compatible with nothing
 - additional IO controllers on FPGA: UART (serial console), SD-Card, VGA
 - Pascal compiler written from zero
@@ -28,8 +31,8 @@
 - (Screenshot image viewer)
 
 ## Supported Boards
-- Arty A7
-- Nexys A7?
+- Arty A7 (with two PMODs for microSD cards and VGA output)
+- Nexys A7 (not ready yet)
 
 ## Pascal Language
 - Wirth Pascal
@@ -55,4 +58,4 @@
 - one program image loaded at a time at a fixed address
 - most parts of the operating system are contained in the program image
 - file system is very primitive: only contiguous blocks, no subdirectories
-- Simple shell reminiscent of TP3.0, edit, compile, run programs
+- simple shell reminiscent of TP3.0, edit, compile, run programs