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Readers from Louisiana and Nebraska. |
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| 8K ROM Monitor Routines |
Continuation of article from prior issue examining the 8K ROM. |
Sinclair ZX81 |
| A Night in Las Vegas |
Review of the cassette from Lamo-Lem. |
Sinclair ZX80 |
| A Tool to Help Debug Programs |
To determine what occurs during a loop portion of a malfuntioning program, use a PRINT statement called a flag. |
Sinclair ZX80, Sinclair ZX81 |
| Annotated 4K ROM Listing - Systems Variables |
Listing tells you the values of all major variables used in the 4K ROM. |
Sinclair ZX80 |
| Beginners: User-Friendly Programs |
Some easy programming methods to write user-friendly programs for either 4K or 8K ROM programs. |
Sinclair ZX80, Sinclair ZX81 |
| Bingo Number Generator |
Generates numbers with their preceding letters and prints them at 8x their normal size at the top of the screen. |
Sinclair ZX80 |
| CAI Peripherals Update |
CAI Instruments will ship their first Widgets the week of Sept. 21. |
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| Changes to September Budget Program |
User interface changes to the program. |
Sinclair ZX80 |
| Changes to Super ZX80 Invasion |
Add new levels of difficulty. |
Sinclair ZX80 |
| Crash Course in Microcomputers |
Review of the book by Louis Frenzel. |
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| Dear Editor |
Letters about magazine index; resistor values; ordering from England; errors in books; TV interference; bad connections; memory problems; replacement parts. |
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| Gradebook for Teachers |
Program helps teachers average grades at the end of the grading period. |
Sinclair ZX80 |
| MicroAce-ZX80 Component Equivalence |
Chart showing part numbers and designations between the two computers. |
MicroAce, Sinclair ZX80 |
| Rounding off Routine |
The 8K ROM’s floating point decimal is great, but sometimes you don’t need 9 decimal places. |
Sinclair ZX81 |
| Sinclair Printer by 1982 |
Sinclair engineers will redesign the printer to meet US requirements at the end of September, 1981. |
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| Sinclair Product Updates |
Sinclair’s ZX81 computer reaches the US on Oct. 7, 1981. |
Sinclair ZX81 |
| Sort Routine |
This routine can sort 20 words of 20 characters in about 8 seconds. |
Sinclair ZX81 |
| Syntax Error |
Two errors in Machine Code Print Routine. |
Sinclair ZX80, Sinclair ZX81 |
| Trouble-shooting Your MicroAce |
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 |
MicroAce |
