Tyd-Byts
Several suggestions have been made in the past to prevent the mysterious crashes in our computers. Here’s another.
Timex/Sinclair 1000
Bug Alert: One-chip NVM
The “One-chip NVM” in SWN 4:1 shows a minor discrepancy between the schematic (Fig. 3) and the pictorials and instructions.
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ABC-123: Educational Games for the ZX81
The “ABC/123” program is quite long, so we are breaking it into two parts. The result of this first installment will be a self-sufficient program in its own right. It is a trainer in the recognition of the alphanumeric characters, both upper and lower case.
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Basil’s Compendium: Go To/Go Sub
This article introduces the concepts of JUMP and CALL, the machie code analogs to Basic’s GOTO and GO SUB.
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Machine Code for the Masses
Intro to writing machine code on the 1000.
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TS1000 Error Reports: Basic & Advanced
Article explores how error reports work on the TS1000/ZX81 computer, and furthermore, how to use “custom” error reports in your own programs.
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Basil’s Compendium: Addition, Overflow, Carry
This article will show you how to add and subtract, and how to “increment” and “decrement” registers; it will tell you about overflow and carrying; and it will Introduce the concept of flags.
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1000 One Chip Mod: A Built-in NVM
This battery backed-up RAM is a miniaturization and functional equivalent of the famous “Hunter” board. It was designed by Mr. Wilf Rigter of the Vancouver, BC T/S User Group. I owe many thanks to Mr. Rigter for inspiring me to write this article, and assisting with technical advise during the construction and refinement of this
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BBDOS: A Disk Operating System for the Aerco FD-ZX Interface
ZX81/TS1000 owners who have been using the Aerco FD-ZX Disk Drive Interface owe Jerry Chamkis and his Texas staff a debt of gratitude for providing them with a reliable, high speed, mass storage system. But even as nice as the FD-ZX unit is, its disc operating system (DOS) leaves much to be desired.
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Ireg 1000
The TS1000 owners manual states (p. 123) that upon return from machine code, the I register must have the value lEh. However, it can be a lot of fun breaking the rules. The I register points to the upper byte of the character generator table in the ROM. If we change it, the character set