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education/computer engineering/ECE2700/Verilog/Types.md

@@ -56,5 +56,25 @@ A `time` variable is unsigned, 64 bits wide, and can be used to store time durat
 ## Real
 The `real` type denotes a floating point value.
 
+## Strings
+Strings are stored in a vector of `reg`s. The width of the `reg` *must* be large enough to hold the string.
 
+Each character in a string represents a one byte ASCII value. If the size of the variable is smaller than the string, the string is truncated.
 # Scalar and Vector Types
+By default, declarations of a net or `reg` value is 1 bit wide, referred to as a *scalar* value (only a single value).
+
+```verilog
+// Scalar declaration
+wire foo;
+// Vector declaration, with 8 bits.
+wire [7:0] bar;
+```
+
+Individual bits in a vector can be accessed using array operators, eg `[i]`.
+
+```verilog
+reg [7:0] foo;
+
+// Write to bit 0
+foo [0] = 1;
+```