devinacker

CTK-551 ROM dump (little endian):
https://revenant1.net/ctk551.bin

CTK-541 service manual (identical PCBs to CTK-551):
https://www.synthxl.com/wp-content/uploads/2020/04/Casio-CTK-541-Service-Manual.pdf

CPU: "Casio GT913F", 20-bit address bus, 16-bit data bus
Similar CTK models feature a uPD913 or uPD914, i.e. the GT913F is apparently a rebranded NEC chip.
Instruction set seems to be based on Hitachi H8/300, but with opcodes 5xxx-7xxx rearranged.

devinacker

#!/usr/bin/env python3

"""
Doom map rect-to-polar "circularizer" - by Revenant

Inspired by a blog post by Ribbiks:
https://rbkz.blogspot.com/2020/05/circularizer-lua.html
"""

from sys import argv

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// ==UserScript==
// @name Mastodon timeline thing
// @description keep timeline from automatically scrolling under mouse cursor
// @author @[email protected]
// @version 0.1
// @include https://mastodon.social/*
// @run-at document-idle
// @namespace revenant.mastodon
// ==/UserScript==

devinacker

.p816
.code

main:
	sei
	stz $4207 ; IRQ at H=0
	stz $4208 ; (leave IRQ disable flag set so it only resumes after WAI)
	lda #%00010000
	sta $4200
	wai

devinacker

.include "libSFX.i"
.feature force_range

.export Decrunch

/*
	Exomizer (raw mode) decruncher for 65c816 / ca65.
	by Devin Acker (Revenant/RSE), 2018
	
	For use on SNES, and theoretically other 65c816-based platforms.

devinacker

/*
	Quick SDL2 wrapper for uPNG
	[email protected]
	
	This code is public domain.
*/

// https://github.com/elanthis/upng
#include "upng/upng.h"
#include <SDL2/SDL.h>

devinacker

twitter.com##.moments
twitter.com##div[data-card2-type^="promo"]
twitter.com##div[data-component-context^="suggest_activity_tweet"]
twitter.com##div[data-component-context^="suggest_recycled_tweet_inline"]

devinacker

from __future__ import print_function
import struct
from omg.util import *

class StructMeta(type):

	@staticmethod
	def _get(f):
		# Get struct field or default value
		def fn(self):

devinacker

//; "Super Keftendo" 256-byte SNES intro source code
//; by Revenant

//; http://www.pouet.net/prod.php?which=70163

//; This is an attempt at implementing the "Kefrens bars" effect on the SNES, using less than
//; 256 bytes of ROM. The technique used here is to set up a 256-color line buffer using
//; Mode 7, then rendering a few pixels directly to CGRAM every scanline and resetting the
//; Y-scroll position to display the same buffer on every visible scanline as it is repeatedly
//; rendered to. Some more information about specific size optimizations are detailed later.

devinacker

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

const char *ui_template = \
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\
<ui version=\"4.0\">\n\
 <class>%s</class>\n\
 <widget class=\"%s\" name=\"%s\">\n\