ZTO-80 BASIC v1.0.0

Changes SIO addresses to fit SBC v3.0 and above.
Gives attribution to Grant Searle for the original code.

Breaks compatibility with SBC v2.0.

Tested to work with SBC v3.0 and v3.1.

ZTO-80 BASIC v0.0.3

Adds version info to the startup.
Tested to work on SBC v2.0.

ZTO-80 BASIC v0.0.2

Fixes a bug where RTS/CTS handshaking is not enabled on initial startup.
Tested to work with SBC v2.0.

ZTO-80 BASIC v0.0.1

Initial release of ZTO-80 BASIC.
Tested to work on SBC V2.0.