max1220’s gists

max1220 / monitor.bash

Created March 12, 2025 20:08

Bash performance monitor script. Outputs CSV data ready for gnuplot!

	#!/bin/bash
	set -euo pipefail

	# change to log output directory
	#cd /var/log/sys_stats
	cd sys_stats

	# wrap stdin with timestamp and newline
	function wrap() { echo -n "${EPOCHREALTIME},"; cat; echo; }

max1220 / build_and_run.sh

Created February 11, 2025 20:36

Bash script to create a Lua wrapper from Verilog using Verilator

	#!/bin/bash
	set -euo pipefail

	# name of the top module(filename must match as well!)
	TOP_MODULE="mcpu_top"

	# Generate XML representation
	echo -e "\e[33m --- Generating XML ---\e[0m"
	verilator --xml-only --top "${TOP_MODULE}" "${TOP_MODULE}.v"

max1220 / emulator_jit.t.lua

Created December 6, 2024 09:12

(BROKEN!) A simple JITed emulator for my MCPU instruction set(does not work yet! Will update soon)

	local debug_print = true

	-- index into the state array("optimized" for instruction decoding)
	local STATE_PC = 0
	local STATE_ADDR = 1
	local STATE_ALU_A = 2
	local STATE_IMM = 3
	local STATE_ALU_B = 4
	local STATE_I = 5
	local STATE_J = 6

max1220 / pretty_print_table.lua

Created April 11, 2024 05:15

Configurable Lua table ANSI pretty printer/serializer. Public domain.

	local function pretty_print_table(tbl, file, indent, num_fmt, no_ansi, style, seen)
	-- default parameters
	file = file or io.stdout
	indent = indent or 0
	num_fmt = tbl.__print_table_number_format or num_fmt or "%.2f"
	style = tbl.__print_table_colors or style or {}
	seen = seen or {}

	-- calculate ANSI color codes
	local key_code = no_ansi and "" or style.key or "\027[1;36m"

max1220 / ffi_defs_drm.lua

Created February 26, 2024 23:19

Basic LuaJIT FFI cdefs for using libdrm.

	local ffi = require("ffi")
	ffi.cdef([[
	typedef unsigned int mode_t;
	typedef unsigned int pid_t;
	typedef unsigned int uid_t;
	typedef unsigned int gid_t;
	typedef unsigned int id_t;
	typedef unsigned int dev_t;

	/* from Linux/include/uapi/drm/drm.h */

max1220 / hello-world-cpu.circ

Created April 24, 2023 12:42

A very simple LogiSim CPU

	<?xml version="1.0" encoding="UTF-8" standalone="no"?>
	<project source="3.8.0" version="1.0">
	This file is intended to be loaded by Logisim-evolution v3.8.0(https://github.com/logisim-evolution/).

	<lib desc="#Wiring" name="0">
	<tool name="Pin">
	<a name="appearance" val="classic"/>
	</tool>
	</lib>
	<lib desc="#Gates" name="1">

max1220 / manage_containers.lua

Created March 9, 2021 14:14

Simple terminal GUI LXC container manager

	#!/usr/bin/env lua5.1
	--[[
	This file provides a simple menu for managing LXC containers
	by calling the associated lxc-* programms.
	It uses the dialog util to provide interactive menus.

	Currently, it supports:
	* create/start/stop/delete/clone/rename containers
	* list running/stopped containers
	* show info/statistics about container

max1220 / rc4.lua

Created March 5, 2021 16:55

Simple RC4 Stream Cipher implementation in Lua

	-- small Lua RC4 library.
	-- Tested in luajit and lua5.3.
	-- Use for testing purposes only!
	-- RC4 is broken, and this is not a well-tested implementation.
	local ok,bit = pcall(require, "bit")
	if not ok then
	bit = require("bit32")
	end
	assert(bit and (bit.bxor(0xFF,0xF0)==0x0F)) -- test bit library xor

max1220 / html_index.lua

Created May 11, 2020 04:07

Generate simple HTML directory indexes (recursive)!

	#!/usr/bin/env lua
	-- return stdout of command as a table containg lines
	local function stdout_lines(cmd)
	local proc = io.popen(cmd, "r")
	local lines = {}
	for line in proc:lines() do
	lines[#lines+1] = line
	end
	proc:close()
	return lines

max1220 / config.lua

Created July 9, 2019 14:57

A Chrome(-ium) Bookmark downloader for youtube videos

	return {
	-- file extensions that are possibly a downloaded youtube video
	file_extensions = {"mp3", "opus", "m4a", "ogg"},

	-- directorys to scan for youtube id's
	local_dirs = {
	"/media/your/music/library/folder/that/contains/youtube_dl/downloaded/videos/"
	},

	-- where to store the downloaded files

Max max1220