Tandy 1000 Programmer's Reference Manual page 7

Appendix A Extended Screen and Keyboard Control
217
Cursor Control 218
Erasing
220
Modes of Operation 221
Keyboard Key Reassignment
223
Appendix B Keyboard ASCII and Scan Codes
225
Appendix C MS-DOS Memory Map
229
ROM
BIOS
Data Area 230
Keyboard Illustration
235