Basil’s Compendium: Hexadecimal and 256-imal
This article introduces the concept of hexadecimal notation and “256-imal.”
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Timex/Sinclair 1000
Run TS1000 Machine Code in High Memory
This trick was originally published in Syntax Quarterly, Summer 1983. It will allow you to use the 32-48K RAM area for machine code, if you have the Memotech or JLO 64 K boards (and maybe some others, but not the Byte-Back UM).
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Basic Topics
Is It A Number? By Fred Nachbaur The following routine contains a trap to insure that you enter a number. This is useful in math drill programs, to prevent cheating by entering an expression. The BASIC interpreter will accept the question as the answer by evaluating the expression for you. For example, in response to
Port Projects: Get the LED-OUT
In any number of monitoring and/or control uses for your ZX/TS, you may find that using a TV set to check on your system is inconvenient or impractical. This would be so, for example, in outdoor or dirty environments or when you simply wish to check the status of one or two system parameters without
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TMS9918A Video Upgrade: Part 1
The TMS9918A video project consists of two PC boards, a small modification/addition to the main computer board, and a +5, +12, -5 VDC power supply (an expansion board of some type is necessary). Video board “A” contains the TMS9918 VDP chip, 16K video ram and one support chip for I/O interfacing. Board “B” contains the
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Additional Byte-Back Memory Pack Notes
Thanks to John Oliger’s NOT M1 decoding circuit, many new and excellent pieces of software are coming into the market place that make use of machine language routines in the 32K-48K (8000-BFFF hex) region of memory. Some examples of these would include Hot Z-II by Ray Kingsley and Memotext in RAM, Version 3, modified and
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Appointment Watch
APPOINTMENT WATCH is a spread sheet program written in machine code and BASIC. It requires at least 16K of memory. In 16K, Appointment Watch allows the user to enter and store 100 appointments. It allows you to enter the Date, Time, and Place of your appointments, as well as with whom they are, and the
For Your Support
Product announcements from Barry Carter, Aerco, Zebra Systems, Pete Petri, JRC Software, Chia-Chi Chao, Poretsky & Poretsky, D. Lipinski Software, K. D. Lewis, American Surplus Trading, Toronto Software World, John Oliger, Rick Munday, A.F.R. Software, Sum-Ware, Al White and WMJ Data Systems.
Forum
Terminal program for TS1000; bus conversion to Spectrum; tilde character; Byte-Back modem with Modem II; converting Spectrum software; RAMTOP with Compusa drive; making backups on the 2068.
Machine Code Topics: How to Write Relocatable Z80 Code
Relocatable code will execute, without modification, when placed at any available address. The techniques to make code completely relocatable are the subject of this article.
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