Syntax/Syntax ZX80 v2 n10

The 8K ROM’s floating point decimal is great, but sometimes you don’t need 9 decimal places.

To determine what occurs during a loop portion of a malfuntioning program, use a PRINT statement called a flag.

This routine can sort 20 words of 20 characters in about 8 seconds.

Sinclair engineers will redesign the printer to meet US requirements at the end of September, 1981.

Some easy programming methods to write user-friendly programs for either 4K or 8K ROM programs.

Review of the book by Louis Frenzel.

Review of the cassette from Lamo-Lem.

Continuation of article from prior issue examining the 8K ROM.

Readers from Louisiana and Nebraska.

Letters about magazine index; resistor values; ordering from England; errors in books; TV interference; bad connections; memory problems; replacement parts.

Listing tells you the values of all major variables used in the 4K ROM.

Generates numbers with their preceding letters and prints them at 8x their normal size at the top of the screen.

Program helps teachers average grades at the end of the grading period.

You’ve put together your MicroAce and examined the PC board solder connections — everything looks good. Power up — you get a white screen and no cursor. What do you do now? Here is a chart compiled by removing each IC chip from a working MicroAce and observing the effect. It may provide you with…

Add new levels of difficulty.

User interface changes to the program.

Two errors in Machine Code Print Routine.

CAI Instruments will ship their first Widgets the week of Sept. 21.

Sinclair’s ZX81 computer reaches the US on Oct. 7, 1981.

Chart showing part numbers and designations between the two computers.