The ZX81 8K BASIC was the only version to use FAST, SCROLL, SLOW and UNPLOT. The ZX80 4K BASIC had the exclusive function TL$() ; it was equivalent to the string operator (2 TO ) in later versions.

2022年6月8日 · A smoothly structured course for learning how to program in ZX81 BASIC. Presents programming examples and exercises to explain how to use all ZX81 BASIC instructions. Offers programming tips throughout to make your ZX81 programs more efficient.

Learn ZX81 BASIC programming with Steven Vickers on World Of Spectrum Classic.

2014年7月17日 · So what does the PROGTOP Machine Code do? The MC takes the Line Number of a BASIC line and puts a NEWLINE in it's place -- not to end the line, but as the Line Number. Unexpectedly, this "hides" the top lines. They are still there, but won't LIST, EDIT or GOTO. Sort of a curious effect of ZX81 BASIC

2020年10月1日 · ZX81 Basic Book covers the basic 1K version, the additional facilities offered by the 16 K expansion RAM, and how to use the ZX Printer. There are 14 original programs for you to run on the machine (for 1K and 16K versions), and forthose confused by computer jargon (and

Timex BASIC is a superset of Sinclair BASIC, with additional commands allowing access to the hardware features found on the Timex systems. Generally speaking, BASIC programs written for the ZX Spectrum will run on Timex machines without modification.

2017年8月9日 · I did the porting to Z80 and ZX BASIC (ZX81 first). The assembling process is divided into 4 internal steps and consists of a preprocessor with processing of macros, a parser to convert source statements into assembler structures, multi-pass assembler to resolve the code and formatter to put the code into several output formats.

The ZX81 is a home computer that was produced by Sinclair Research and manufactured in Dundee, Scotland, by Timex Corporation. It was launched in the United Kingdom in March 1981 as the successor to Sinclair's ZX80 and designed to be a low-cost introduction to home computing for the general public.

The ZX81 operates on channel 36 UHF, & when it is first plugged in and properly tuned it gives a picture like this: When using the computer, you will probably want to turn the volume right down. If your television has a continuously variable tuning control, then …

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