Generated by All in One SEO v4.9.7.2, this is an llms.txt file, used by LLMs to index the site. # hackup.net Bigby's Web Log ## Sitemaps - [XML Sitemap](https://www.hackup.net/sitemap.xml): Contains all public & indexable URLs for this website. ## Posts - [Building a Greaseweazle Station](https://www.hackup.net/2025/04/building-a-greaseweazle-station/) - It only takes a Greaseweazle F7 Lightning Plus, two different floppy drives, and a custom designed, 3D printed case to build a Greaseweazle Station. - [Super Zaxxon Replica](https://www.hackup.net/2018/10/super-zaxxon-replica/) - My story how I started by investigating PLA replacements for the Commodore C64 and ended up creating a nice looking replica of the Super Zaxxon cartridge. - [Amiga 500 Samsung Keyboard Repair](https://www.hackup.net/2024/12/amiga-500-samsung-keyboard-repair/) - When I received my first Amiga 500 I found that 3 keys weren't working. I managed to repair the membrane of the broken Samsung keyboard that I found within. - [How to Lower Your PLA: The PLA264](https://www.hackup.net/2023/05/how-to-lower-your-pla-the-pla264/) - The PLA264 is a replacement for the MOS 251641-02, a lowered version of the proven PLA16V8 that also fits into the tight space of the Commodore Plus/4's case. - [SD2IECplug v2.0](https://www.hackup.net/2018/10/sd2iecplug-v2-0/) - Presenting an all new version 2.0 of the pluggable SD2IEC. It's half the size, cheaper to make, and still has all the relevant features! - [Making Cartridges for the Commodore C16, C116, and Plus/4](https://www.hackup.net/2023/12/making-cartridges-for-the-commodore-c16-c116-and-plus-4/) - I replicated the cartridge PCB for Commodore 16 and Plus/4, created a modernized, more flexible version, and designed a new, easy-to-print case for both. - [SX-64 Tiny Reset - Count Reset Button Presses](https://www.hackup.net/2023/10/sx-64-tiny-reset-count-reset-button-presses/) - The SX-64 Tiny Reset allows you to select the drive number and the Kernal on a Commodore SX-64 by counting how many times in a row its reset button is pressed. - [C128 Diagnostic Cartridge #325093-01 Replicated](https://www.hackup.net/2023/05/c128-diagnostic-cartridge-325093-01-replicated/) - How I replicated the Diagnostic Test cartridge ASSY NO. 325093-01 for the Commodore C128 and its test harness using KiCAD 7. - [Building a new ZX81 Computer](https://www.hackup.net/2022/01/building-a-new-zx81-computer/) - Building a ZX81 clone today with all new parts using the ZX81+38 PCB, with a stylish printed case and a tactile keyboard. - [Erasing and Programming the ATF1504 CPLD](https://www.hackup.net/2020/01/erasing-and-programming-the-atf1504-cpld/) - Erasing and Programming the ATF1504 CPLD using a standard FT232HQ breakout board and a custom adapter to produce the necessary voltage. - [How to Unbrick the Xiaomi Dafang Camera](https://www.hackup.net/2023/08/how-to-unbrick-the-xiaomi-dafang-camera/) - How I bricked my Xiaomi Dafang Camera trying to install u-boot, and how I restored it back to life by desoldering and reprogramming the internal flash chip. - [Four at One Blow: The ROMulator](https://www.hackup.net/2023/05/four-at-one-blow-the-romulator/) - I replaced all four ROMs in a Commodore Plus/4 computer with a single W27C512 using a 72LS08 logic IC in a simple circuit. And it even fits into the case! - [Building a PS/2 to 1351 Mouse Adapter](https://www.hackup.net/2022/12/building-a-ps-2-to-1351-mouse-adapter/) - I built myself an adapter based on the ATmega8 MCU to connect a PS/2 compatible mouse to a Commodore 64, emulating an original Mouse 1351. - [Hama WiFi LED-Bulb Teardown](https://www.hackup.net/2022/12/hama-wifi-led-bulb-teardown/) - The Hama 176584 WiFi LED-Bulb was offered at a very low price. Let's see what we get and if we can install Tasmota without breaking it open. - [The KERNALquattro, yet another ROM Replacement](https://www.hackup.net/2022/05/the-kernal-quattro-a-2364-rom-replacement/) - The KERNALquattro is a compact, versatile, and still relatively cheap replacement for 2364 ROMs found in the Commodore 64 and other computers of that time. - [SyncFix64 Revisited - What about the VIC-20?](https://www.hackup.net/2022/04/syncfix64-revisited-what-about-the-vic-20/) - Time to revisit and improve the SyncFix64. We need to make it fit to process the composite video signal from a VIC-20 before sending it on to a cheap car TFT. - [Bank Switching Cartridges](https://www.hackup.net/2019/07/bank-switching-cartridges/) - Cartridges for the C64 provide either 8K or 16K of ROM that will replace parts of the memory visible to the CPU when plugged into the expansion port. Either 8K or 16K, that is all the Commodore can see directly on a cartridge. Then there is an auto-start mechanism implemented in the Kernal that can - [The NeoRAM Remix](https://www.hackup.net/2019/04/the-neoram-remix/) - The NeoRAM is compatible to the GeoRAM but it allows for a maximum of 2MB of RAM and it is battery buffered, preserving the contents of the memory for months. - [Making a XA1541 Cable](https://www.hackup.net/2009/08/making-a-xa1541-cable/) - The XA1541 seemed like a good choice to start. It's an adapter to connect the Commodore 1541 disk drive to the parallel port of a PC. - [Pagefox - Reverse Engineered and Replicated](https://www.hackup.net/2021/08/pagefox-reverse-engineered-and-replicated/) - My story on how I reverse engineered and replicated the Pagefox hardware, a 34 years old cartridge for the Commodore 64 using KiCAD. - [C64 Expansion Port Expander Research](https://www.hackup.net/2018/06/c64-expansion-port-expander-research/) - Expansion port expanders are adapters which allow multiple cartridges to be attached physically to the C64 at the same time. In rare cases, two of those cartridges will then be usable simultaneously, for the majority of cases the expander allows the user to switch between them. I've never owned one of these devices but I've - [ESD Protection for the C64 Control Ports](https://www.hackup.net/2020/08/esd-protection-for-the-c64-control-ports/) - The two 9-pin Control Ports located on the right-hand side of the C64 are used to connect joysticks and other input devices like paddles or even a mouse to the 8-bit computer. The digital input pins are directly connected to one of the two 6526 Complex Interface Adapters (CIA) inside the C64, without any protection - [Commodore VIC-20 S-Video Mod](https://www.hackup.net/2020/05/commodore-vic-20-s-video-mod/) - Last Summer, after a delay of mere 38 years, I finally acquired my first Commodore VIC-20, or VC 20 as it was called in Germany. Not all parts of the machine are in their original state as the connoisseur will notice on first sight. I don't care too much about that because I didn't want - [The XCPLA - Yet Another PLA Replacement](https://www.hackup.net/2019/06/the-xcpla-yet-another-pla-replacement/) - I've covered the PLA and the question how to replace a broken one before. First, when I repaired one of my C64 from back in the day, needed a quick replacement, and used an EEPROM on a simple adapter board. In a follow-up post I used a simple circuit suggested in a talk by Eslapion - [Cheap Displays for Old Hardware](https://www.hackup.net/2017/12/cheap-displays-for-old-hardware/) - A couple of months ago I dug out my old Commodore hardware again and started tinkering with it - the goal being to finally try out a bunch of mods, hacks, and builds that I missed back in the day. To start with, I bought a cheap TFT display (new link on eBay, even newer - [Pi1541io Revision 2](https://www.hackup.net/2018/06/pi1541io-revision-2/) - On Friday, I received the prototype batch of PCBs for the second revision of my IO Adapter for the Pi1541 project. Today, I finally found the time to assemble a couple of those boards and so far, everything seems to be working great! When assembling one of the rev.2 boards, there are multiple alternative configuration - [C64 Saver Evolution](https://www.hackup.net/2020/01/c64-saver-evolution/) - The original external power supply for the Commodore 64 comes in different forms but they all have one thing in common: With increasing age they are prone to failure and when they finally break they are likely to destroy the precious computer they were powering. The power brick for the Commodore delivers both 9V AC - [Fixing WifiModem64 Version 1.0](https://www.hackup.net/2018/01/fixing-wifimodem64-version-1-0/) - As hinted at earlier, I made a couple of mistakes when designing version 1.0 of the WifiModem64 and they will be fixed in version 1.1. Still, with some minor manual modifications, those first boards are still usable. In short, RTS must be connected to WeMos D7 instead of D8 for the ESP8266 to boot reliably - [The Modular WifiModem64](https://www.hackup.net/2017/12/the-modular-wifimodem64/) - I've been playing with the ESP8266 since late 2014 and it was love on first sight: so many possible uses for such a small device at such a low price tag. And very early on I thought: wouldn't it be great to build a WiFi "modem" from this? That shouldn't be too hard. But I - [Prologue](https://www.hackup.net/2009/07/prologue/) - My soldering iron, my collection of spare electronic components and related tools had been stored away in the basement for years. - [Turn a BASIC Program into a Cartridge for the C64](https://www.hackup.net/2019/04/turn-a-basic-program-into-a-cartridge-for-the-c64/) - The other day, I was researching the Jason-Ranheim Capture cartridges and browsing the DDI Projects on that topic. The capture cartridge is a freezer module for the C64 that allows the internal state of the machine to be saved or to be burned directly into an EPROM. These ROMs can then be installed in a - [On Kernal Switchers](https://www.hackup.net/2019/03/on-kernal-switchers/) - The Kernal is the low-level "operating system" of the Commodore 64. The functions it provides are the basis for higher level routines in Basic and most other software running on Commodore's 8-bit machines. In case of the C64 it comes in the form of an 8k ROM chip or as part of a 16k ROM - [News Bits: Awards, Revisions, and Cases](https://www.hackup.net/2019/01/news-bits-awards-revisions-and-cases/) - An Award Winning Board Today, I'd like to share some brief news and updates on multiple topics. First up is some exciting news. Last year, when I created and shared the Pi1541io layout I had those boards made by PCBWay and I entered their 2nd annual design contest on a whim with the popular revision - [TapecartFlasher Nano](https://www.hackup.net/2018/09/tapecartflasher-nano/) - In my previous post I introduced the Tapecart, a thumb drive for the Commodore 64, and built one of those. The only major issue with these great devices is the 1.5 hours it takes for the C64 to transfer the 2 MB of data to them. Fortunately, Detlef Gerhardt came up with the idea of - [Retro Repair, Addendum I](https://www.hackup.net/2018/04/retro-repair-addendum-i/) - In my last post I repaired the mainboard of an old Commodore 64 I had retrieved from the attic. After replacing quite a few components, the board was working again for most practical purposes. One issue remained to be investigated though: under certain circumstances, some characters on the screen would change their color seemingly at - [C64 Mainboard Assy No. 250425 "Repair"](https://www.hackup.net/2018/06/c64-mainboard-assy-no-250425-repair/) - Repairing the old Commodore C64 a few months back was a lot of fun and I learned much about the old machines in the process. Now I wanted a new challenge and so I bought a C64 motherboard Assy No. 250425 on eBay. The board came without case, keyboard or any other accessories and it - [The 32-Bit Tapecart](https://www.hackup.net/2018/10/the-32-bit-tapecart/) - A few weeks ago, I built the through-hole version of the Tapecart based on an ATtiny44. The original and probably the most wide spread variant of the Tapecart is much smaller though. It is built from surface mount components and it is based on the much harder to get 32-bit AT SAM D09 controller. I - [Making a XU1541 Cable](https://www.hackup.net/2009/12/making-a-xu1541-cable/) - The XU1541 is basically the USB version of the XA1541 based on an AVR microcrontroller. - [SD2IEC Revisited](https://www.hackup.net/2017/12/sd2iec-revisited/) - When I discovered the MMC2IEC / SD2IEC project by chance back in 2009, it made me dig up again my soldering iron and electronic components after many years of disuse. I built myself one of those devices on a prototyping board and had a lot of fun doing so. It was the first time that - [Project excavation: SD2IEC on Perfboard](https://www.hackup.net/2017/12/project-excavation-sd2iec-on-perfboard/) - The discovery of the SD2IEC back in 2009 rekindled my interest in electronics. I started this blog after I built myself one of those devices but I never got around to documenting it. At least I'd like to share the images I took during the assembly process now. " order_by="sortorder" order_direction="ASC" returns="included" maximum_entity_count="500"] - [SyncFix64 Prototype](https://www.hackup.net/2017/12/syncfix64-prototype/) - After the encouraging results of my first attempt to fix the composite signal from a C64, so that the cheap TFT monitor could display it, I shared the idea on Forum64 to double-check and get some feedback. Consensus seems to be that the circuit at least won't hurt the video source. Since, in addition to - [Pi1541io in between Revisions](https://www.hackup.net/2018/05/pi1541io-in-between-revisions/) - After I assembled and tested the first revision Pi1541io board, I sent the remainder of the prototype batch on to interested members of Forum64 for further testing. While I'm still hoping for feedback from their side, I'm already working on the next revision of the PCB that will fix a couple of minor issues. As - [SyncFix64 v1.1](https://www.hackup.net/2018/01/syncfix64-v1-1/) - Following the first prototype of the LM1881 based SyncFix64 I made a few minor changes, improving the schematics and layout. Then I was ready to order the first batch of properly manufactured PCBs. The boards took a little over two weeks for production and shipping. This was also my first try at ordering a v-cut - [First Retro Repair](https://www.hackup.net/2018/04/first-retro-repair/) - Recently, I retrieved a Commodore 64 "breadbox" version from my parent's attic that was given to me by a friend in the early 90s. As I recall, it wasn't fully functional even back then. It would halt as soon as a program tried to play any sound. But when I connected it now and powered - [Pi1541 IO Adapter](https://www.hackup.net/2018/05/pi1541-io-adapter/) - Update 2018-05-25: Now that revision 1 is confirmed to be working despite a couple of minor issues, here's the rev.1 Gerber files for download. Bear in mind though that the improved 2nd revision is under development and will be available soon! Two weeks ago, there were exciting retro-news on the Lemon64 board: Gorack - aka. - [Pi1541io Revision 3](https://www.hackup.net/2018/07/pi1541io-revision-3/) - Update: For those of you who can't wait and who understand the possible issues described below, rev.3 boards are now available on PCBWay. If you can wait another 3 weeks I'd recommend you wait for the next revision. After a longer wait, today I finally received the prototype batch of PCBs for revision - [Pi1541io Revision 4](https://www.hackup.net/2018/07/pi1541io-revision-4/) - The prototype batch of PCBs for revision 4 of the Pi1541io board didn't take long to ship and it arrived from PCBWay while I was on vacation. Today, I finally managed to assemble one of the boards and everything seems to work great!Revision 4 is basically what the previous one should have been: an improved - [The Tapecart - A Thumb Drive for the C64](https://www.hackup.net/2018/08/the-tapecart-a-thumb-drive-for-the-c64/) - The Tapecart is a relatively new piece of hardware that was devised for the Commodore 64 by Unseen and enthusi and introduced in late 2016. The general idea is quite compelling: The small module features 2 MB of serial flash memory and plugs into the cassette port of the Commodore. By just entering LOAD or - [Android Development on Windows using an Intellibook Tablet](https://www.hackup.net/2013/07/android-development-on-windows-using-an-intellibook-tablet/) - Earlier this year I acquired a 7 inch Intellibook Android tablet by ordering a trial subscription for a magazine on Java programming. When I tried to use it for Android development on Windows today, I couldn't find a suitable USB driver. It took me a while to find out that the driver released by Google for - [OpenWRT and the Zsun Card Reader](https://www.hackup.net/2016/04/openwrt-and-the-zsun-card-reader/) - During the last few weeks since my first post about the Zsun WiFi Card Reader I learned a few things that I haven't documented yet. After I was able to confirm that my device has indeed PCB v2 but that flashing should work just the same, I tried the simple method described here: Insert a - [The Zsun WiFi Card Reader](https://www.hackup.net/2016/03/the-zsun-wifi-card-reader/) - I'm not sure where I read first about the $8 Zsun WiFi Card Reader and the attempts by the people at Warsaw Hackerspace to flash it with their port of OpenWRT. It made me curious, so I went ahead and ordered a sample. Shipping from China took a while but I received the tiny gadget - [The Fancy Lantern Stick](https://www.hackup.net/2015/10/the-fancy-lantern-stick/) - I'm not sure about other parts of the world, but back here in Germany we've got a tradition called Laternelaufen. It involves lanterns, preferably home-made from cardboard and colored paper, lantern sticks, and a bunch of happily singing children. And of course, it requires a way of lighting the lanterns. Traditionally, this is accomplished by the - [Converting .mysql_history Files to New Format](https://www.hackup.net/2015/09/converting-mysql_history-files-to-new-format/) - When I upgraded one of my servers from Fedora 20 to 21 recently, I noticed that - among a few other issues - the command line history of my mysql client was missing. Too me, this is valuable information and documentation, even. So I investigated and found, that the file format for the .mysql_history seemed - [Wireless Sensor Network, Part 2](https://www.hackup.net/2015/08/wireless-sensor-network-part-2/) - Still trying to save my batteries By now it is time for at least an intermediate update on this project. In the meantime I have indeed revised the sensor boards by adding a switching transistor controlled through one of the remaining digital pins on the ATmega. The firmware was modified, and it will now power - [Wireless Sensor Network, Part 1](https://www.hackup.net/2014/12/wireless-sensor-network-part-1/) - With all components finally having arrived from China, I built the first couple of wireless sensors a few months ago. They are using the cheap nRF24L01 transceiver modules for data transmission based on the RF24Network network layer. I'm using a Raspberry Pi with the transceiver module directly connected to its GPIO pins as the root - [Minimal Arduino using an ATmega88](https://www.hackup.net/2014/08/minimal-arduino-using-an-atmega88/) - In preparation of the quest to build my own wireless sensor network I spent some time in getting a minimal Arduino up and running based on the ATmega8 chip. It was not before I finally succeeded that I realized it would be of no use in this case, because the ATmega8 lacks the ability to - [Cheap USBASP Sticks for V-USB Development](https://www.hackup.net/2013/06/cheap-usbasp-sticks-for-v-usb-development/) - A while ago I ordered a couple of cheap USBASP sticks. They are to be had on Ebay for as little as 2,50 € including world wide shipping and meant to be used for programming AVR microcontrollers. The programmer itself is based on an ATMega 8 controller so one of the sticks can actually be - [USB Receiver for the Ruwido Merlin IR Keyboard](https://www.hackup.net/2013/05/usb-receiver-for-the-ruwido-merlin-ir-keyboard/) - When I noticed this compact IR Keyboard was on sale for no more than 1.- € I had no choice but to order a couple. One of them might prove useful when I manage to set up a media center based on a Raspberry Pi some day. Of course, this keyboard comes without a receiver. - [Seeeduino Stalker: Writing to the SD Card](https://www.hackup.net/2011/08/seeeduino-stalker-writing-to-the-sd-card/) - After I managed to upload the first sketches to the Seeeduino Stalker last week, I was eager to try the special features offered by this special kind of Arduino platform. I decided to try writing to an SD card first and followed the example included in the Stalker's documentation. Which turned out to not work - [OpenWRT and Scripting Languages, Part 1](https://www.hackup.net/2012/01/openwrt-and-scripting-languages-part-1/) - The RGB wall light project is currently on hold due to a massive lack of time. Still, I'm taking little steps of preparation for the second phase of the project, the software intended to control the RGB matrix. I could use the gcc cross compiler for the job, but using a scripting language to develop - [Fixing Broken PSU of Asus WL-500gP Router](https://www.hackup.net/2011/12/fixing-broken-psu-of-asus-wl-500gp-router/) - I've been using the Asus WL-500g Premium under OpenWRT for years. I always keep a second cold-spare device in stock to minimize our household's downtime in case the router breaks. Last year, it was actually the router's power supply unit that ceased to function. After I replaced it with the PSU from the spare device - [Serial Communication Between an Arduino and the TL-MR3220 Router](https://www.hackup.net/2011/09/serial-communication-between-an-arduino-and-the-tl-mr3220-router/) - Last time, I installed OpenWRT on the TL-MR3220 router and added a connector for it's serial interface. Today, I wanted to try and connect this interface to an Arduino to make the two communicate. The router's interface operates at 3.3V while the Arduino's UART operates at 5V, so we need to convert between those levels. - [OpenWRT and the Serial Console of the TL-MR3220 Router](https://www.hackup.net/2011/08/openwrt-and-the-serial-console-of-the-tl-mr3220-router/) - The TP-LINK router TL-MR3220 is a very cheap (around €22 in Germany) yet feature-rich wireless 802.11n router that supports the open source OpenWRT firmware. It offers a USB port, allowing a bunch of additional peripheral hardware to be connected. Installing the matching OpenWRT nightly build was easy enough, the original firmware offers to do so using - [Connecting to the Seeeduino Stalker](https://www.hackup.net/2011/08/connecting-to-the-seeeduino-stalker/) - A few weeks ago, Seeed Studio were celebrating their anniversary with a bunch of limited offers. Among other things, I acquired a pair of Seeeduino Stalkers v1.0 with an Atmega 168. Unfortunately, the serial interface on those boards is not labeled. So it took me a while to figure out how to connect the FTDI - [Unboxing the DSO Nano](https://www.hackup.net/2010/01/unboxing-the-dso-nano/) - On Friday, I received a late Christmas present to myself: after about 4 weeks of travel, my DSO Nano finally arrived! A long time, but that's alright, it didn't take much longer than I had expected. Also, the current weather conditions are not really fit to speed up delivery times. The oscilloscope and the few - [Fixed Weave Sync Again](https://www.hackup.net/2010/01/fixed-weave-sync-again/) - After I upgraded my Weave server to API version 1.0, syncing my bookmarks between browsers no longer worked alright. At first, I didn't really notice because Weave Sync still seemed to work but just not -- well, just not always. Fuzzy symptoms that kept me from investigating for some time. Then, almost by accident, I - [Waiting for my DSO Nano](https://www.hackup.net/2009/12/waiting-for-my-dso-nano/) - Ordered the DSO nano, a brand-new pocket-sized digital oscilloscope. - [Mozilla Weave Server Upgrade to API Version 1.0](https://www.hackup.net/2009/11/mozilla-weave-server-upgrade-to-api-version-1-0/) - After my recent upgrade to the first beta release 1.0b1 of the plug-in, the sync process failed again, indicating that an upgrade of the server might be needed. ## Categories - [Uncategorized](https://www.hackup.net/category/uncategorized/) - [Making and Tinkering](https://www.hackup.net/category/making-and-tinkering/) - [Coding and Software](https://www.hackup.net/category/coding-and-software/) - [Retrocomputing](https://www.hackup.net/category/retrocomputing/) ## Tags - [C64](https://www.hackup.net/tag/c64/) - Commodore 64 - [Personal](https://www.hackup.net/tag/personal/) - [XA1541](https://www.hackup.net/tag/xa1541/) - [XU1541](https://www.hackup.net/tag/xu1541/) - [AVR](https://www.hackup.net/tag/avr/) - 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