home *** CD-ROM | disk | FTP | other *** search
- RS232TST reads the status byte from an RS232 control port and places
- it in ZCPR3 user register 8. Registers 0 through 7 contain either 1
- or 0, depending on bits of the status byte. Optional wheel protec-
- tion and I/O port selection are set by patching well marked bytes in
- the first sector of the program. If RS232TST is wheel protected and
- the wheel byte is reset, RS232TST returns an error code 6, making it
- effectively invisible to non-wheels.