‘Watchglass’ is a simple program for monitoring the health of a constellation of Bitcoin nodes. The user interface is in the form of an IRC bot, based on my August 2019 ‘Logotron’. Unlike the latter, this program has no nonstandard library dependencies (i.e. it will operate on a stock Python 2.7 installation.)
The program was written [...]
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 [...]
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 [...]
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 [...]
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 [...]
Update: As of 26 Nov 2019, all of the auction items in my boneyard have been sold and sent to their purchasers.
I have been asked to catalogue certain contents of my machine boneyard which are due to change hands on account of imminent liquidations of two operations in which I took part.
The items pictured below [...]
Warning: If you reached this page from anywhere other than loper-os.org or my IRC logger site, please do not send me bug reports. Chances are that you were looking at a hostile fork of this program. All questions pertaining to such ought to be addressed to the maintainers of those forks.
[...]
This article is a continuation of the M series.
The vpatch given below entirely re-implements the TLB (MMU) of M to use SIMD instructions from the AMD64 SSE2 set.
Whereas previously TLB entries were kept in memory and searched iteratively, now we keep the Tags (3 byte each) sliced into three XMM registers, and search them in [...]
This article is a continuation of the M series.
The vpatch given below speeds up the execution of M by approximately 30% (as measured by the Dhrystone benchmark.) It implements separate single-entry TLB caches for reads and writes; a set of fastpath exception handlers; and several other minor optimizations.
You will need:
A Keccak-based [...]
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 fraudulently pretends to do.
To keep [...]