Vol.1 n°6 february 1976

Vol.1 n°6 february 1976

p.1 In the Queue (table of contents)

p.1 In the Queue (table of contents)

Foreground

p.16 KEYBOARD MODIFICATION

p.16 KEYBOARD MODIFICATION

[theme : Surplus] [author : Macomber]

p.54 LEDs LIGHT UP YOUR LOGIC

p.54 LEDs LIGHT UP YOUR LOGIC

[theme : Techniques] [author : Gray]

p.58 BUILD A TTL PULSE CATCHER

p.58 BUILD A TTL PULSE CATCHER

[theme : Test Equipment] [author : Walde]

p.60 DRESSING UP FRONT PANELS

p.60 DRESSING UP FRONT PANELS

[theme : Techniques] [author : Walters]

Background

p.18 MY DEAR AUNT SALLY

p.18 MY DEAR AUNT SALLY

[theme : Algorithms] [author : Grappel]

p.26 PROCESSING ALGEBRAIC EXPRESSIONS

p.26 PROCESSING ALGEBRAIC EXPRESSIONS

[theme : Algorithms] [author : Maurer]

p.32 DATA PATHS

p.32 DATA PATHS

[theme : Hardware] [author : Liming]

p.42 THE NEW ALTAIR 680

p.42 THE NEW ALTAIR 680

[theme : New Product] [author : Vice]

p.46 HOW TO SAVE THE BYTES

p.46 HOW TO SAVE THE BYTES

[theme : Man-Machine Interface] [author : McIntire]

p.50 MORE ON THE SWTPC 6800 SYSTEM

p.50 MORE ON THE SWTPC 6800 SYSTEM

[theme : New Product] [author : Kay]

p.62 TV COLOR GRAPHICS

p.62 TV COLOR GRAPHICS

[theme : Hardware] [author : Lancaster]

p.76 COULD A COMPUTER TAKE OVER?

p.76 COULD A COMPUTER TAKE OVER?

[theme : Speculation] [author : Rush]

Nucleus

p.2 In This BYTE

p.2 In This BYTE

p.4 Join the Club

p.4 Join the Club

p.10 Letters

p.10 Letters

p.14 Our New Offices

p.14 Our New Offices

p.31, 83 BYTE's Bits

p.31, 83 BYTE's Bits

p.41 Chips Found Floating Down Silicon Slough

p.41 Chips Found Floating Down Silicon Slough

p.61 Classified Ads

p.61 Classified Ads

p.69 Numbers

p.69 Numbers

p.70 Clubs, Newsletters

p.70 Clubs, Newsletters

p.72 Audio Cassette Standards Symposium

p.72 Audio Cassette Standards Symposium

p.74 View From Silicon Valley

p.74 View From Silicon Valley

p.84 8080 Op Code Table

p.84 8080 Op Code Table

p.92 Book Reviews

p.92 Book Reviews

p.95 BOMB

p.95 BOMB

p.96 The BYTE Questionnaire

p.96 The BYTE Questionnaire

p.96 Reader's Service

p.96 Reader's Service

In This BYTE

How does a computer evaluate a complicated mathematical expression? There are many ways to accomplish this function. One technique is to use the My Dear Aunt Sally Algorithm which is described by Robert Grappel.

There is more than one way to Process Algebraic Expressions, of course. In his article on the subject, W.D. Maurer describes the Bauer-Samelson algorithm, which uses an operator stack and an operand stack to parse algebraic expressions.

How do bits get from one place to another? The design of Data Paths to convey information is an important consideration in any system. Gary Liming provides some background information on the subject.

MITS makes a 6800 product, too. James B. Vice of MITS describes his company's design in an article on The New Altair 680.

Hard copy can be created in many ways. Its purpose is to record information in a form which humans can interpret unaided. In How to Save the Bytes, Thomas Mcintire proposes a multiple-segment character set which might be useful for an inexpensive print mechanism.

Gary Kay continues a presentation of information on the Southwest Technical Products Corporation's 6800 system which was begun in BYTE No.4. This month's installment presents information about the memory boards, serial interface, control interface, parallel interface, power supply and case. The information is completed with a short discussion of available software and future additions to the system.

BYTE has published a few examples of LEDs used in test probes and diagnostic equipment. In his article E. W. Gray provides some basic information on the use of LEDs. After incorporating his suggestions you can have LEDs Light Up Your Logic in more ways than one.

One way to monitor digital data lines is simply to drive an LED based upon the steady state of the line. But what if you are dealing with occasional pulses? A simple indicator is the TTL Pulse Catcher described by Bill Walde, a test instrument which can be built from one IC, one LED, two switches and two resistors.

How do you generate graphics patterns for TV raster scanning? One answer is provided by Don Lancaster's discussion of Color Graphics Techniques.

Could a Computer Take Over? Ed Rush provides us with some thoughts on the subject with ample references to the speculative fiction of computer technology. We'll let readers draw their own conclusions.

Getting Information from Joysticks and Slide Pots is a problem which must be solved for interactive game purposes. One solution to the problem is shown in this issue.

And on the cover, artist Robert Tinney shows My Dear Aunt Sally at work tutoring a computer on the subject of interpreting arithmetic expressions.