Symbolics "MacIvory": PCB Photographs.

This post concerns the “MacIvory” Model 3 Lisp Machine. It is of interest strictly to bolixologists. Click on a photo to see detailed version. Machine chassis: The Ivory NuBus Board Set (i.e. the LispM itself, the Mac Quadra is otherwise ordinary): “Ivory” NuBus board, component-side: What’s under the labels? Bolix Label Part Notes 115999-B PLUS20L8 […]

“Finite Field Arithmetic” vs MPI.

Let’s compare the CPU cost of modular exponentiation performed on Chapter 14 FFA vs ye olde MPI. V-press the MPI tree to mpi_second_cut.vpatch (or use diana_coman’s cleaned-up variant, this should not affect the result of the test.) Now, replace the test_mpi.c example I provided, with the following MPIistic implementation of the Ch.14 example test tape: […]

“Finite Field Arithmetic.” Chapter 14B: Barrett's Modular Reduction. (Part 2 of 2.)

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 14A-Bis: Barrett's Modular Reduction. (Physical Bounds Proof.)

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 […]

Uncrating of Symbolics "MacIvory" Machine

At long last, got hold of one of these:

“Finite Field Arithmetic.” Chapter 14A: Barrett's Modular Reduction. (Part 1 of 2)

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 […]