DATASAVE allows you to save a selected portion of memory to tape and then load it back again to any part of memory. Loading code with DATASAVE does not (of necessity) write over the program that you are running, so a program can load data from tape, manipulate it, and then save it back to
Datasave – Files Without Programs Read More »
This program demonstrates the use and manipulation of a 3-dimensional string array, N$(R,C,9), by tracking occupancy with a numeric array, P(R,C). The program runs in slow mode; you can see blocks move.
Using only 16 chapters and 8 appendices, the author takes you on a guided tour of the Z80 in Sinclair country, distinguishing the CPU properties from the system behavior with clarity and flair. Your tour guide is an expert whose practical experience includes writing the word processor “WORD*” on which this book is written. Appendix
A Practical Guide to Machine Language Programming on the Timex/Sinclair Read More »
This sophisticated coder and decoder runs in only 2K. Use it for fun as a stand-alone program, or create a subroutine to make your datafiles unintelligible without the keyword.
This program can calculate PI to over 8000 decimal places— but don’t hold your breath. It takes over 12 hours for 512 digits! The algorithm uses base 100 arithmetic, storing each digit in one byte of a character string (codes 0-99). It is based on the Taylor series for the arctangent.
Utility programs for renumbering the lines of BASIC programs facilitate merging with other programs, spreading out line numbers to make room for additional lines, and neatening up finished programs. Changing line numbers is easy, but a useful renumbering utility must also fix the destination line numbers in GOTOs and GOSUBs, a more difficult task. This
I wrote this program as a result of a great disappointment I experienced after purchasing a Biorhythms program from one of the prominent software companies. The program did not print an accurate set of curves, and did not print a mathematically correct result.
Enter this line by hitting 1, CLEAR, cursor back, REM, NOT, /. Execute via RAND USR 16514.
Not Entirely Clear Read More »
RAND will not work properly on ZX/TS machines if the program RUNS automatically when LOADed.
ROMPAK permits you to use many programs instantly—cartridges in the rough. An adaptor plugs onto your ZX/TS and provides a socket to contain the program ROM. A simple machine code routine in the ROM moves the program into RAM in under a second, and you’re ready to go.
You can shorten and clarify some of your programs by using one loop and several flag variables to perform related operations. For a sample, let’s take a utility that creates, modifies, moves, checks, and prints a ten-byte MC routine.
