ZX81 BASIC

Chapter

1. Setting up the ZX81
2. Telling the computer what to do
3. A History lesson
4. The Sinclair ZX81 as a calculator
5. Functions
6. Variables
7. Strings
8. Computer programming
9. More computer programming
10. If...
11. The character set
12. Looping
13. SLOW and FAST
14. Subroutines
15. Making your programs work
16. Tape storage
17. Printing with frills
18. Graphics
19. Time & motion
20. The ZX81 Printer
21. Substrings
22. Arrays
23. When the computer gets full
24. Counting on your fingers
25. How the computer works
26. Using machine code
27. Organization of memory
28. The system variables

Appendix

A. The character set
B. Report codes
C. The ZX81 for those that understand BASIC