Hardware I/O

There are 3 basic hardware operations: read from a hardware module, write to a module,and write to the output data stream. The read from a module also has a variations that allows reading into a variable or directly into the output data stream. In addition, there is a clear crate statement which performs the appropriate operation for that crate.

Output, either explicitly done with the output statement, or implicitly done by a hard-ware read operation, is assumed to be in units of 4 byte integers. Each time a code section is called, it produces a single bank of 4 byte integers. The bank header (including bank length) is inserted automatically.