The CrossWorks assembler provides a number of built-in or predefined data types. They correspond to those in a high-level language such as C. You can use them to allocate data storage; for instance, the following allocates one byte of data for the count symbol:
count DV BYTE
The directive DV allocates one byte of space for count in the current section and sets count's type to BYTE.
| Type name | Size in bytes | Description |
| BYTE | 1 | Unsigned 8-bit byte |
| WORD | processor-dependent | Unsigned word, dependent upon processor word size |
| LONG | 4 | Unsigned 32-bit word |
| CHAR | 1 | 8-bit character |
| ADDR | processor-dependent | Address |