"M" Genesis.

Current Table of Contents: M is a MIPS-III system emulator, written purely in AMD64 assembly to make optimal use of commonplace iron. As discussed previously. M will run lightly-modified Linux kernels with strict logical isolation vs. the host (and vs. any other instances of itself.) That is, it in fact does exactly what e.g. QEMU […]

“Finite Field Arithmetic.” Chapter 18B: "Cutouts" in Peh.

This article is part of a series of hands-on tutorials introducing FFA, or the Finite Field Arithmetic library. FFA differs from the typical “Open Sores” abomination, in that — rather than trusting the author blindly with their lives — prospective users are expected to read and fully understand every single line. In exactly the same […]

“Finite Field Arithmetic.” Chapter 18A: Subroutines in Peh.

This article is part of a series of hands-on tutorials introducing FFA, or the Finite Field Arithmetic library. FFA differs from the typical “Open Sores” abomination, in that — rather than trusting the author blindly with their lives — prospective users are expected to read and fully understand every single line. In exactly the same […]

“Finite Field Arithmetic.” Chapter 17: Introduction to Peh.

This article is part of a series of hands-on tutorials introducing FFA, or the Finite Field Arithmetic library. FFA differs from the typical “Open Sores” abomination, in that — rather than trusting the author blindly with their lives — prospective users are expected to read and fully understand every single line. In exactly the same […]

X-Ray Large-Format Kindergarten.

Below is the output of a new test-fire of the PCB radiography system, this time using FujiFilm “Super HR-T Medium Speed” (25×20 cm) film in place of the earlier self-developing dental Eco-30. However, the time has not yet come to molest the MacIvory — first, we must characterize the film and the pertinent chemistry. This […]

X-Ray Microscopy of Symbolics "Ivory" CPUs.

I currently have three Symbolics MacIvory CPUs. (Do you, reader, have one to sell? Please leave a comment!) One is currently installed in a working machine and was not yet molested; the two remaining chips, I obtained in 2017 by bartering away a Symbolics 3620. At some point I will cut one or more of […]

X-Ray Spectrography Kindergarten.

This article is a continuation of “X-Ray Microscopy Kindergarten.”. Preliminary experiment with multi-energy x-ray (colour channel combination), distinguishing materials by absorption at different wavelengths. The tube appears to exhibit some “heel effect” at the longer wavelengths. Exposure: 75 sec. @ 35kV, 21kV, 20kV (R, G, B) film: “Eco-30”.

X-Ray Stereography Kindergarten.

This article is a continuation of “X-Ray Microscopy Kindergarten.”. Here, we see a stereo pair (approx. +/- 25 deg. one-axis rotation of the object from the horizontal plane, while film is stationary) of the device from before. The vias are clearly distinguishable. Exposure: 70 sec. @ 34kV; 0.3mA + 2x beam spread; film: “Eco-30”.

X-Ray Microscopy Kindergarten.

This article is a continuation of “PCB Radiography Kindergarten, Continued.”. The radiography system is equipped with a “microfocus” tube, and its beam has a 30 degree spread cone. So we can get a look at that very same FG TRNG XC9572 CPLD seen earlier, but with 2x magnification: Click for full resolution (Warning: 7MB) This […]

PCB Radiography Kindergarten, Continued.

This article is a continuation of “PCB Radiography Kindergarten”. This was a second test-fire of that radiography system, using yet-another board where I already know where everything is (on account of having designed it.) This time, the victim is a FG TRNG Mainboard: Click for full resolution (Warning: 16MB) For comparison, a visible-light photograph of […]