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Serge Zaitsev zserge

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zserge / 1drl.coffee
Created October 24, 2025 08:27
NAMES = {
'@': 'Fighter'
'}': 'Archer'
'&': 'Monk'
'h': 'Hobgoblin'
'o': 'Orc'
'g': 'Gargoile'
'H': 'Hobgoblin Lord'
'O': 'Orc Lord'
'G': 'Gargoile Lord'
@zserge
zserge / 6502.py
Created December 28, 2024 19:28
tiny 6502 emulator in python
import base64
OPSZ = [1, 2, 0, 0, 0, 2, 2, 0, 1, 2, 1, 0, 0, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0, 3, 2, 0, 0, 2, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0, 1, 2, 0, 0, 0, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0, 1, 2, 0, 0, 0, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0, 0, 2, 0, 0, 2, 2, 2, 0, 1, 0, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 2, 2, 2, 0, 1, 3, 1, 0, 0, 3, 0, 0, 2, 2, 2, 0, 2, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 2, 2, 2, 0, 1, 3, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 2, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0, 2, 2, 0, 0, 2, 2, 2, 0, 1, 2, 1, 0, 3, 3, 3, 0, 2, 2, 0, 0, 0, 2, 2, 0, 1, 3, 0, 0, 0, 3, 3, 0]
WOZMON = base64.b64decode('2Figf4wS0KmnjRHQjRPQyd/wE8mb8APIEA+p3CDv/6mNIO//oAGIMPatEdAQ+60Q0JkAAiDv/8mN0NSg/6kAqgqFK8i5AALJjfDUya6Q9PDwybrw68nS8DuGKIYphCq5AAJJsMkKkAZpiMn6kBEKCgoKogQKJigmKcrQ+MjQ4MQq8JckK1AQpSiBJuYm0LXmJ0xE/2wkADArogK
@zserge
zserge / nanogit.go
Created January 19, 2023 18:01
package main
import (
"bytes"
"compress/zlib"
"crypto/sha1"
"encoding/hex"
"fmt"
"io"
"log"
@zserge
zserge / ray.cc
Last active April 9, 2024 11:49
Minimal ray tracer for leaning purposes
#include <array>
#include <cmath>
#include <fstream>
#include <iostream>
#include <vector>
struct Vec {
float x, y, z;
Vec(float vx, float vy, float vz) : x(vx), y(vy), z(vz) {}
Vec operator+(Vec vec) { return {x + vec.x, y + vec.y, z + vec.z}; }
@zserge
zserge / example.html
Last active April 2, 2021 21:49
This is the smallest possible CSS-in-JS that supports all CSS rules, media queries, keyframes and generates unique class names for each CSS block. Can be used with React or with any other framework.
<body>
<script type="module">
import { css } from './zercss.js';
// Global styles
css`
&{} /* This would be a global CSS */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { max-width: 40rem; padding: 2rem; margin: auto; }
`;
@zserge
zserge / editor.html
Created September 18, 2020 09:04
<!DOCTYPE html>
<html>
<head>
<style>
.editor { font-family: 'Roboto Mono', monospace; font-size: 12px; outline: none; overflow-y: auto; padding-left: 48px; counter-reset: line; }
.editor div { display: block; position: relative; white-space: pre-wrap; }
.editor div::before { content: counter(line); counter-increment: line; position: absolute; right: calc(100% + 16px); opacity: 0.5; }
</style>
</head>
@zserge
zserge / Add.java
Last active November 22, 2021 11:16
A tiny JVM to run a single method from a single class
public class Add {
public static int add(int a, int b) {
return a + b;
}
}
@zserge
zserge / container.c
Created May 10, 2020 15:16
#define _GNU_SOURCE
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
@zserge
zserge / guest.S
Created May 10, 2020 08:41
A tiny KVM host to run a 16-bit real mode "kernel"
# A tiny 16-bit guest "kernel" that infinitely prints an incremented number to the debug port
#
# Build it:
#
# as -32 guest.S -o guest.o
# ld -m elf_i386 --oformat binary -N -e _start -Ttext 0x10000 -o guest guest.o
#
.globl _start
@zserge
zserge / kvm-host.c
Last active October 19, 2025 12:57
Tiny KVM host to at least partially run Linux kernel
#define _GNU_SOURCE
#include <asm/bootparam.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>