| 8-16K Switch for Cheetah 64K RAM Pack |
Detailed hardware modification for adding a DPDT switch to the Cheetah 64K RAM pack, allowing the 8-16K address block to be disabled so incompatible ROM cartridges (e.g., word processor modules) can be used simultaneously. Requires cutting two PCB traces (from IC4 pin 14 to the ROMCS edge connector and from IC4 pin 14 to IC3 |
Timex/Sinclair 1000 |
| A Cozy Nook for Machine Code in the TS2068 |
Identifies a 323-byte area starting at address 25365 (in single-display mode) used for bank switching that can safely store machine code when bank switching is not in use. The author tested loading zeros and machine code there without difficulty to normal TS2068 operation. Also notes unused fixed addresses in the system variable area at 23681. |
Timex/Sinclair 2068 |
| Graphing Data, Part II: Program Listing |
Complete BASIC listing for Graph-It, the TS2068 graphing program reviewed in the previous issue (v2 n9). The listing starts at line 8900 so it can be MERGEd on top of the Screencalc spreadsheet (Banta Software), creating the first integrated spreadsheet+graphics program for a Timex/Sinclair. Menu-driven with 7 options: enter data, display data, choose plot symbols, |
Timex/Sinclair 2068, Type-in program |
| Password Security for the TS2068 |
ON ERR technique for the TS2068 to prevent accidental BREAKing of a running program, with an improvement: a secret password subroutine (lines 9000–9090). ON ERR RESET is triggered only when the user types the correct password string (with debounced INKEY$ accumulation), allowing authorized BREAKing while keeping untrained users locked out. Useful for programs handling sensitive |
Timex/Sinclair 2068, Type-in program |
| Rita Carr's Newsletter Exchange |
Standing column reporting on the inter-user-group newsletter exchange program coordinated by Rita Carr of SVTSUG. Notes exchanging current issues with participating groups and soliciting new participants. Brief mention of news received from other T/S newsletters across the country. |
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| Sinclair Research Ltd. Expands |
Press release from Mary Reinman of Sinclair Research in Boston: Sinclair Research has opened new sales offices in the Middle East and Southeast Asia as part of an international expansion. Worldwide sales now exceed 3 million units; production exceeds 150,000 units per month. The QL (68008-based) has been available by mail order in the UK |
Sinclair QL |
| The Jungle Jim: ROM Character Generator, Part I |
First of two parts on the TS1000 ROM character generator table: 512 bytes at addresses 7680–8191 defining 64 characters as 8-byte sets. Explains how to calculate a character’s start address (7680 + 8 * CODE A$) and includes a BASIC program that displays any character as a large bit-pattern grid by reading and converting each |
Timex/Sinclair 1000, Type-in program |
| Tips from CPT Charles R. Byler |
Two tips from APO-stationed reader: (1) To load and stop auto-running machine code from the TS1000/ZX81 without executing it, enter the POKE sequence to load at an address, LOAD the program, then RUN it — it stops at the load address. (2) For TS2068 owners wanting to run UK Spectrum software: replace the first 16K |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| WORM Word Processor Review |
Review of WORM, a word processor for TS1000/1500 machines written by Gordon Young and published in T/S Horizons Nos. 5, 6, and 7. Because WORM drops from machine code to BASIC for printing, it easily accommodates any USR or LPRINT CHR$ routines needed for different printers and interfaces. Features include upper/lower case entry, on-screen word |
Timex/Sinclair 1000 |
