StarPro64 を普段使いの Desktop として使う(使えるか?)

今年の初夏に RISC-V のシングルボードコンピュータ StarPro64 が入手可能だったので購 …

60% Keyboard Kit

I have been using 60% keyboard. For some years, it was my practice buying a kit (of GH60 variant) around end of year (with Aliexpress or Taobao) and building it in new year.

Basically …

19 x 31 = 589 >= 587

I implemented safegcd256 for Gnuk. It uses signed 31-bit integers, and it does 19 iterations for p = 2**255 - 19.

Modular inversion

In the computation of X25519, we need to compute the modular inversion at the last step to get the value of x in …

Second-hand PC, Dell Optilex

I installed Debian Bookworm to this machine. It took a half of day.

I use USB Bloutooth Dongle of 0a12:0001 for the machine.

Comments on Bookworm

Mostly, the installation procedure and the configuration for Bookworm was as same as my installation of Buster.

In the …