The OUT statement outputs a byte to the specified I/O port. It is equivalent to WRITEIO 8080,Port;Byte. The OUTW statement outputs a word to the specified I/O port. It is equivalent to WRITEIO -8080,Port;Word. These statements are useful for doing I/O with devices, data acquisition boards, etc. for which there is no device driver available.
Some operating systems, such as Windows NT protect I/O ports; applications are not allowed to read or write to them. Under such operating systems, these functions are not allowed.
Back-porting
to HP BASIC:
OUT and OUTW are unique to HTBasic statements that are not available in HP BASIC. They should not be used in programs that must be ported back to HP BASIC.
