Table of Contents
| Discless HP-UX Workstations | 6 |
| HP-UX 6.0 provides low-cost discless workstation operaiton over a local area network. It also provides a single file system view, intervendor file sharing, and conformance to UNIX® System V Interface Definition (SVID) semantics. |
|
| Scott W. Wang |
| 9 |
| Scott W. Wang |
| A Discless HP-UX File System | 10 |
| Debra S. Bartlett, Joel D. Tesler |
| Discless Program Execution and Virtual Memory Management | 15 |
| Ching-Fa Hwang, William T. McMahon |
| The Design of Network functions for Discless Clusters | 20 |
| David O. Gutierrez, Chiuan-Shium Lin |
| Crash Detection and Recovery in a Discless HP-UX System | 27 |
| Annette Randel |
| Boot Mechanism for Discless HP-UX | 33 |
| Perry E. Scott, John S. Marvin, Robert D. Quist |
| Discless System Configuration Taks | 37 |
| Kimberly S. Wagner |
| Small Computer System Interface | 39 |
| The SCSI standard is the newest interface for the HP9000 Series 300 family of HP-UX workstations. It offers improved performance, simplicity in design, a wide choice of controller chips, and wide acceptance in the UNIX® community. |
|
| Paul Q. Perlmutter |
| 44 |
| X: A Window System Standard for Distributed Computing Environments | 46 |
| Frank E. Hall, James B. Byers |
| Managing the Development of the HP DeskJet Printer | 51 |
| Forays into unexplored regions of techonolgy are inevitable in the development of breaktrough products, but they must be limited and carefully managed. |
|
| John D. Rhodes |
| Market Research as a Design Tool |
| 53 |
| Alan Grube |
| Human Factors and Industrial Design of the HP DeskJet Printer |
| 54 |
| Don McClelland |
| Development of a High-Resolution Thermal Inkjet Printer | 55 |
| The HP DeskJet printer's 300-dot-per-inch resolution is fundamental to its ability to produce laser quality output. |
|
| William A. Buskirk, David E. Hackleman, Stanley T. Hall, Paula H. Kanarek, Robert N. Low, Kenneth E. Trueba, Richard R. Van de Poll |
| Integrating the Printhead into the HP DeskJet Printer | 62 |
| The printerhead support systems provide signals to energize the ink-firing resistors, electrical connections to the pen, a carriage to hold and move the pen, and elements to protect and maintain the pen. |
|
| J. Paul Harmon, John A. Widder |
| DeskJet Printer Chassis and Mechanism Design | 67 |
| One mechanism moves the carriage while another uses a single motor to pick, feed, and eject paper and prime the pen. The polycarbonate chassis supports everything. |
|
| Larry A. Jackson, Kieran B. Kelly, David W. Pinkernell, Steve O. Rasmussen, John A. Widder |
| Data to Dots in the HP DeskJet Printer | 76 |
| A microprocessor-controlled custom IC manipulates dot data to provide double-width, half-width, comressed, half-height, draft-quality, bold, underlined, and tall characters, and graphics, too. |
|
| Donna J. May, Mark D. Lund, Thomas B. Pritchard, Claude W. Nichols |
| The DeskJet Printer Custom Ingrated Circuit |
| 77 |
| Thomas B. Pritchard |
| DeskJet Printer Font Design |
| 79 |
| Bruce Yano |
| Firmware for a Laser-Quality Thermal Inkjet Printer | 81 |
| The firmware resident in the HP DeskJet printer is divided into generic printer code and printer specific code. An optional catridge provides Epson FX-80 emulation. |
|
| Mark J. DiVittorio, Brian Cripe, Claude W. Nichols, Michael S. Ard, Kevin R. Hudson, David J. Neff |
| 82 |
| Claude W. Nichols |
| Robotic Assembly of HP DeskJet Printer Circuit Board in a Just-in-Time Environment | 87 |
| A high-speed machine places most of the surface mount components while a vision-guided robot places small components and plastic leaded chip carriers. |
|
| P. David Gast |
| DeskJet Printer Design for Manufacturability |
| 88 |
| Don Harring |
| Fabricated Parts Tooling Plan |
| 90 |
| C/M and Machine Vision in the Production of Thermal Inkjet Printerheads | 91 |
| Machine vision systems for DeskJet printhead production range from open-loop/no-go systems to process verification systems to completely integrated process control systems. |
|
| Mark C. Huth, Robert A. Conder, Gregg P. Ferry, Brian L. Helterline, Robert F. Aman, Timothy S. Hubley |
| Whole Wafer Assembly of Thermal Inkjet Printerheads |
| 92 |
| Robert F. Aman |
| Production Print Quality Evaluation of the DeskJet Printer |
| 96 |
| Timothy S. Hubley |
| Economical, High-Performance Optical Encoders | 100 |
| These high-resolution optical encoders are inexpensive and easy to install, making closed-loop motion control feasible in high-volume, extremely cost sensitive applications. |
|
| Howard C. Epstein, Mark G. Leonard, Robert Nicol |
| Basics of Optical Incremental Encoders |
| 100 |
| A Complete Encoder Based on the HEDS-9000 Encoder Module |
| 105 |
| Chris Togami |
| |
| Departments | |
| In this Issue | 4 |
| Cover | 5 |
| What's Ahead | 5 |
| Authors | 107 |
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