Syntax/Syntax ZX80 v2 n9

Constructs number tables with columns lined up.

Review of the book by William Lewis.

Use your ZX80 to compare fuel economies and estimate total gas expenditures.

Machine language (ML) permits you to print characters anywhere on the screen. Harness the ZX80’s own print routine with RST 0010.

Beginning machine language (ML) programmers sometimes have trouble deciphering all the numbers that make up an assembly listing.

Program lists all prime numbers between 1 and 1000.

Potential solution to problems with LOAD.

Not for neophytes– that’ s John Strain’s assessment of the MicroAce Flicker-Free Video Add-on Board. According to John, “The flicker-free mod circuit board does not physically fit inside the ZX80 case. The components supplied completely prevented mounting the circuit board inside the ZX80.” Also, you can’t use the top display line; you must add components…

Compare RND (4K, 8K), RAND (8K), and RANDOMISE (4K) .

One of the 8K ROM’s nicest features is its increased printing capability.

Routines broaden your ability to use strings in interesting ways.

Readers from Califonia, Florida, Illinois, Maryland.

Letters about 4K ROM; tape recorders; modifying the ZX80 cursor; TV interference.

ZX80 Basic substitutions for LEN and VAL functions.

Can keep track of expenses. As written, program keeps addition totals on 18 accounts.

The Peripheral People offer a device to help you LOAD and SAVE cleanly.

Program that presented tailored study, using ZX80s, to those who want extra help in math.

This ZX80 version sets a LEM 2,530 meters above the moon with only 300 liters of fuel. You must land without crashing or running out of fuel.

Closely approximate sine functions on your 4K ROM with a few BASIC statements.

Use logic probe to record state of ICs in the computer.

Corrections to ZX80 Checkbook; Improving Display.

Want a flicker-free screen? JRS Software now offers software for continuous display.

4K ROM assembly listing has been delayed for a couple of weeks.

Interface Technology has resumed plans to adapt the TRS-80 Microcommander to the ZX80. The device gives the computer direct control of up to 256 lights and appliances.

Sinclair Research plans to hold computer shows to introduce its ZX81 this fall.

Sinclair now has another source of 8K ROMs. According to Nigel Searle, the new manufacturer will deliver by September 1 enough ROMs to both replace bad ROMs and satisfy demand for new ones.