tvlooy

OpenBSD VMM howto

Setup

/etc/rc.conf.local

apmd_flags="-A"
dhcpd_flags=vether0
vmd_flags=
ntpd_flags="-s"

mego22

Install dependincies

apt-get install  git-core build-essential pkg-config libtool libevent-dev libncurses-dev zlib1g-dev automake libssh-dev cmake ruby

Install msgpack >= 1.2.0

cd /tmp
git clone https://github.com/msgpack/msgpack-c.git
./create_keys.sh

kometbomb

PICO-8 size optimization stuff for tweetcarts

Here are some simple ways to make your PICO-8 code fit in 140 280 characters (as in the #tweetjam #tweetcart craze). I did not invent these, I merely observed and collected them from the tweetjam thread.

LUA syntax stuff

• Use single character variable names
• Use x=.1 and x=.023, not x=0.1 or x=0.023
• x=1/3 is shorter than x=.3333
• You don't need to separate everything with spaces or write them on their own lines, e.g. circ(x,y,1)pset(z,q,7) works just as well

stonehippo

some hardware platforms I find interesting

• Raspberry Pi - popular Linux SBCs, and now some really cool microcontrollers
• MESH — drop-in DIY IoT components
• Particle — Connected prototyping for wifi and cell-based products
• Hologram — similar to Particle
• Electric Imp — Connected device platform, with modules and services; part of Twilio now
• Intel Edison — Tiny x86-class board dead and buried
• C.H.I.P — $9 computing platform seems to be gone now
• bluz — BLE boards, compatible with Particle Cloud

paniq

Screen resolutions
------------------

PICO-8 supports different undocumented videomodes that can be activated at runtime, 
using poke(0x5F2C, X) where X is one of the following mode numbers:

0: 128x128, 0 pages
1: 64x128, 1 page
2: 128x64, 1 page
3: 64x64, 3 pages

blacktm

#!/bin/bash

# --------------------------------------------------------------------------------------------
# Installs Ruby using rbenv/ruby-build on the Raspberry Pi (Raspbian)
#
# Run from the web:
#   bash <(curl -s https://gist.githubusercontent.com/blacktm/8302741/raw/install_ruby_rpi.sh)
# --------------------------------------------------------------------------------------------

# Set the Ruby version you want to install

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

psobot

# Hacky random image thumbnailer.
# by Peter Sobot, April 21, 2012
# Based heavily on code by Michael Macias
#   (https://gist.github.com/a54cd41137b678935c91)

require 'rmagick'

images = Dir.glob(ARGV[0] ? ARGV[0]
                    : '-default-input-paths-')
output_dir = (ARGV[1] ? ARGV[1]