Circuit Cellar Ink 89
December 1997

Table of Contents

2 Janice Hughes	Task Manager No Slowing Down
6	Reader I/O Letters to the Editor
8 Harv Weiner	New Product News
12 Craig Haller	The Zen of BDM On-Chip Debugging Still doing the old crash and burn debugging? Perhaps it's time to try your hand at debugging with on-chip resources. In Craig's opinion, it's the safest way to avoid intrusive overhead that alters the way your code runs.
20 Ingo Cyliax	Serial BDM Interface for ColdFire Since conventional debugging techniques often don't work on embedded systems, Ingo checks out ColdFire's on-chip debugger. He builds a simple BDM-to-serial interface that helps him control and modify the chip.
28 Janusz Mlodzianowski	A Simple Multipurpose Logic Analyzer There are times when what's available on the market is not what you want. The price, features, or expandability just doesn't meet your current needs. What do you do? If you're Janusz, you build your own. Download: LOGICANA.ZIP
Embedded PC 38 Harv Weiner	Nouveau PC
Embedded PC 43 Janice Hughes	EPC Design Contest Winners
Embedded PC 46 Francis Deck	A High-Speed Logic Analyzer for Windows 95 While it's relatively simple to directly read logic signals using the parallel port of a PC, it's sluggish and timing is not reliable. Instead, Francis builds a small FIFO circuit that can sample at over 20 MHz and is clock independent. Download: analyzer.zip
Embedded PC 50 Rick Lehrbaum	PC/104 Quarter PC/104 Gets Tough -- Ruggedizing the Embedded PC Despite what we put up with from our desktop machines, we expect embedded PCs to run like clockwork, regardless of the environment. Rick shows us how to ruggedize PC systems to meet the tough demands of the real world.
Embedded PC 56 Fred Eady	Applied PCs Interfaces and GUI-Building Packages, Part 2: Emulating Paper Tape Just because you don't use paper tape any more, don't assume it's out of the picture everywhere. Many old machines still use it, and you never know when you'll have to build a paper-tape emulator. Fred shows you how to do it using emWare. Note: Followup on emWare by Todd Rytting in INK 92 Reader I/O. Comment by Robert Michaels in INK 96 Reader I/O
62 Cheng-Yang Tan	A Hardware Keyboard Remapper The search for the perfect keyboard -- that's Cheng-Yang's mission. His PC/AT keyboard gives him the tactile feel he wants, but the keys are in the wrong place! However, with this remapper, he gains the best of both worlds. Download: KEYBOARD.ZIP Note: Credit for the diagrams and tables in INK 92 Reader I/O.
65	Advertiser's Index
70 Tom Napier	MicroSeries Applying Direct Digital Synthesis, Part 1: Making Waves with NCOs Are you tired of the limited output range of your VCO? What about its difficult modulation? Tom suggests you try an NCO, which lets you synthesize any waveform and offers you high-frequency output.
76 Jeff Bachiochi	From the Bench Listening to Magnetism Although some of the New Age rave would have you believe differently, you can't hear magnetic waves -- until now ... Jeff builds a magnetic-field sensor that lets you know when you're getting to full strength.
80 Tom Cantrell	Silicon Update Hot Chips IX Just back from the Hot Chips show, Tom charts odd aberrations in memory, updates us on CPU extensions and processor/FPGA combinations, and snaps the latest picture of the digital-camera world.
96 Steve Ciarcia	HTML Priority Interrupt The Best Kept Secret Note: Several comments in INK 93 Reader I/O.

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