Articles (9)
| Title | Author(s) | Publication | Date |
|---|---|---|---|
| Numbers Held Inexactly in the ZX81 (Part 2) Second part of the series on ZX81 floating-point representation, focusing on positive integral powers of 10. Explains that powers of... | Frank O'Hara | Syntax | April 1982 |
| Numbers Held Inexactly on the ZX81 The largest is really this 39-digit number: 170141183420855150474555134919112130560. | Syntax | May 1982 | |
| Numbers Held Inexactly on the ZX81 First in a series of articles on numerical errors in the 8K ROM. | Syntax | March 1982 | |
| Numbers Held Inexactly on the ZX81 (Part 1) First part of a series examining floating-point representation errors in the ZX81 8K ROM. Focuses on integer powers of 2... | Frank O'Hara | Syntax | March 1982 |
| Numbers Held Inexactly on the ZX81 (Part 5) Fifth and final part of the series, covering FOR-NEXT loop counter behavior with non-integral step values. Explains why floating-point imprecision... | Frank O'Hara | Syntax | July 1982 |
| Numbers Held Inexactly on the ZX81, Part 4 The ZX81 doesn’t hold simple decimals like .5 & .25 exactly. | Syntax | June 1982 | |
| Program Improvements Improvements to Big Characters, Line Renumbering and Powers of Negative Numbers. | Syntax | August 1982 | |
| Program Improvements Improvements to READ-DATA-RESTORE, Flower Plot, Income Tax program. | Martin Irons (K2MI) Frank O'Hara Bill Bruton | Syntax | June 1982 |
| Spaces in REM Statements If you put your machine code in large REM statements, you need not laboriously type in spaces or digits. | Syntax | August 1982 |
Books (2)
| Title | Author(s) | Date |
|---|---|---|
| The Complete Spectrum ROM Disassembly American readers found this book invaluable in understanding the Timex/Sinclair 2068 ROM. | Ian Logan, Frank O'Hara | 1983 |
| The Complete Timex TS1000/Sinclair ZX81 ROM Disassembly Includes Part A: 0000H-0F54H & Part B: 0F55H – 1DFFH. | Ian Logan; Frank O'Hara | 1982 |