Circuit Cellar Ink 35
June 1993

Table of Contents

2 Ken Davidson	Editor's INK We Don't Talk Anymore
6	Reader's INK Letters to the Editor
8 Harv Weiner	New Product News
14 Lawrence Foltzer	Long-range Infrared Communications IR communications are useful for more than just controlling your TV. High data rates and long distances are possible with off-the-shelf devices as long as you know the proper design techniques.
26 David Wyland	Embedded Control Using ACCESS.bus Macintosh users have long been used to plugging multiple peripherals together with a single kind of cabling system using Apple's Desktop Bus. Now, ACCESS.bus promises to clean up the cable clutter for PCs, too. Download: ACCESSPC.ZIP
34 Robert Clemens Tom Stockebrand	A PC-to-ACCESS.bus Interface Card
38 Michael Swartzendruber	High-speed Modem Basics: Standards and Theory What do all those modem "V." numbers mean and what do they do? What about all those file transfer protocols available on BBSs? In this first part, Michael tries to shed some light and introduces his Gemini modem.
50 Ed Nisley	Firmware Furnace After This Brief Interruption: IRQs and INTs for the '386SX Interrupts are tricky at best even for the most experienced embedded programmer. The original designers of the PC didn't make the task any easier. Ed does his best to try to clear the muddied water. Download: FF35.ZIP
60 Jeff Bachiochi	From the Bench Component Selection, Inspection, Rejection A capacitor is a capacitor, right? Not necessarily. A connection is a connection, right? Think again. Both component selection and PC board layout can be critical in making a circuit perform properly.
64 Tom Cantrell	Silicon Update The Ultimate RAM? The Quest for Core Continues The more things change, the more they stay the same. Just when you thought core memory had been relegated to the museum, along comes a new idea based on an old concept.
70 John Dybowski	Embedded Techniques Putting I2C Through Its Paces Does an interface board with A/D and D/A conversion, EEPROM, real-time clock, and 8 bits of I/O mean lots of processor connections? Not with I2C. Following up on last month's introduction, John builds some I2C hardware. Download: ET35.ZIP
78 Russ Reiss	Patent Talk
81	Advertiser's Index
85 Ken Davidson	ConnecTime -- Excerpts from the Circuit Cellar BBS
96 Steve Ciarcia	Steve's Own INK Eat at Joe's

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