Bendix IN-2014A VHF COM/NAV System Display Information

IN-2014 is the display module for the Bendix CN-2013 VHF COM/NAV, which in turn belongs to the BX2000 Family. This display shows glide slope deviation and other navigational information using a gas discharge display.

It, unfortunately, means it needs high voltages to operate (to be specific, ±115V DC), so I can’t really test it with the equipment I have at hand.

On the internet, there isn’t much information about this display module, so I purchased an installation manual of the CN-2013 system, and the following is some important stuff specifically about that display module. I hope this is helpful for somebody.

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新网站 / New Website Available




Argus 3000/5000/7000 (Monochrome) Hacking – 1

The system design of these moving map displays is surprisingly compact. It is a streamlined 68000 system with a CRT display. It reminded me of those early Z80 computers.

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IEEE Selected Reprint Series Catalog

I always held the highest respect to the forerunners of electronics in the 80s and earlier: they managed to produce a myriad of circuitry crafts with extremely limited access to documentation and other resources. It was an era when the community culture is highly cherished and established mainly through magazines and books. IEEE, being one of the leaders of science & engineering communities, had been releasing bounded volumes about specific topics for quite a few decades. These bounded volumes are known as the “IEEE Press Selected Reprint Series”.

The objective of this post is to make an unofficial catalog of those books. The content will also be listed for easy indexing.

Note that, despite all the historic and aesthetic value about them, these releases have been totally obsolete for too long. If you’re a student like me, do not waste your time reading them – go for something newer instead.

If possible, I really want to make this into a wiki for easier indexing. IEEE must have published a huge amount of these books, but there is not much information on the internet.

Table Of Contents
  1. Active Inductorless Filters – 1971
  2. Digital Signal Processing – 1972
  3. A Practical Guide to Minicomputer Applications – Jan 1, 1972
  4. Integrated Optics – 1973
  5. Key Papers in the Development of Coding Theory – Jan 1, 1974
  6. Stability of Large Electric Power Systems – 1974
  7. Nonlinear Networks: Theory and Analysis – 1975
  8. Computer Network – 1976
  9. Systems Engineering: Methodology & Applications – 1977
  10. Digital Signal Computers & Processors – 1977
  11. Integrated-Circuit Operational Amplifiers – Jan 1, 1978
  12. Modern Spectrum Analysis – 1978
  13. Programs for Digital Signal Processing – Dec 1, 1979
  14. Protective Relaying for Power Systems – Jan 1, 1980
  15. Interference Analysis of Communication Systems – Jan 1, 1980
  16. Geometric Theory of Diffraction – June 1, 1981
  17. Modern Active Filter Design – 1981
  18. Color Television – June 1, 1983
  19. Biological Effects of Electromagnetic Radiation – Sep 1, 1983
  20. Power Transistors: Device Design and Applications – 1984
  21. Microwave and Milimeter-Wave Mixers – 1984
  22. Distributed Computing: Concepts and Implementations – 1984
  23. Low-Temperature Electronics – Jul, 1986
  24. Adaptive Methods for Control System Design – 1986
  25. Residue Number System Arithemetic: Modern Applications in Digital Signal Processing – 1986
  26. Radar Applications – Jan 1, 1987
  27. Modern Spectrum Analysis, II – 1986
  28. Multi-Microprocessors – Jun 1, 1987
  29. Microcomputer Control of Power Electronics and Drives – Jun 1, 1987
  30. Robust Control – Jun 1, 1987
  31. Microwave Digital Radio – Jun 1, 1988
  32. High Voltage Integrated Circuits – Jun 1, 1988
  33. Polysilicon Emitter Bipolar Transistors – 1989
  34. Analog MOS Integrated Circuits, II – 1989
  35. Visual Communication Systems – Mar 1, 1990
  36. Vector Quantization – Apr 1, 1990
  37. Navigation: Land, Sea, Air, and Space – Aug 1, 1990
  38. Multichip Modules: Systems Advantages, Major Constructions, and Materials Technologies – May 1, 1991
  39. Kalman Filtering: Theory and Application – Oct, 1991
  40. Neural Networks: Theoretical Foundations and Analysis – Jan 1, 1992
  41. Computational Electromagnetics: Frequency-Domain Method of Moments – Jan 1, 1992
  42. A New Guide for Better Technical Presentations: Applying Proven Techniques With Modern Tools – Feb 1, 1992
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Modding 12C+

This page is still under construction…

More info:

Flashing 10C, 11C, 16C ROM

16C is still extremely buggy, the decimal mode is almost unusable, probably something to do with ALU mode switching; 15C doesn’t work at all because the 12C+ firmware doesn’t support paging. 10C and 11C should work with no problem.

Notice: The following sequence only works for REV2 (with rev.2 written on the back plate). It will not work on a more commonly seen REV 1, which I don’t possess yet. It should work in a similar way, but I don’t think REV 1 allows flash access without forced erasing, which deletes the nut emulator.

How to (12C+ rev2):

  1. Extract RAW Nut Processor ROM binary file from 10C or 11C.
  2. The original ROM file is 12-bit per word, convert it to 16-bit big-endian binary. (You should look for certain ARCHIVEs of the nonpareil emulator for the ROM file)
  3. Flash the binary file into address 4800-77FF
  4. Enjoy

HP 9100B Repaired

I received this 9100B in Sep. 2021. It came in very good cosmetic condition, but didn’t do anything when plugged in: Not even the indicator lights. With the help of the internet, I’ve successfully identified a few problems in the power supply. I have also found some core-memory circuit malfunctioning that haven’t been encountered before. As a return, I’m now writing this post to share my diagnosis process and some over-saturated photos.

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Adv. Verilog Parametric Code Snippets

Who needs those fangled Scala-HDLs, when they can use generate in Verilog2001.

— Sun Tzu

TOC / Nov.25.2021

  1. Parallel Combinational Maxima Function
  2. SAR Controller
  3. CLA
  4. Combinational Leading Zero Counter
  5. Barrel Shifter

Key Points:

  • Recursion is possible
  • Functional programming mindset helps (dig up your copy of SICP!)
  • Use the netlist optimization functionality of your toolchain effectively (we can safely assume that all unused outputs, and all constant inputs can be optimized-out post synthesis)

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