The weeCee is perhaps the smallest MSDOS gaming PC ever made that doesn't use emulation.It is based around an ICOP Vortex86 CPU module, which is a pentium-class x86-compatible embedded system-on-module that is intended for industrial control. However the module also works great for DOS gaming, as it includes a highly-compatible VGA graphics chip.To this I also added a Soundblaster Pro-compatible sound chip from Crystal Semiconductor, which is still available new-old-stock from utsource, and a gameport-compatible connector for using joysticks and gamepads.It can also support internal waveblaster MIDI expansions such as the Dreamblaster S2, or external MIDI sound modules like the MT32 and Sound Canvas.It also includes network support for multiplayer games, as well as a USB connector for mass storage devices.Enclosure will require a Hammond 1457J1201 case, as well as the end-plates gerbers included in the zip file below.Source files are available in Circuitmaker's cloud storage : https://circuitmaker.com/Projects/Details/rasteri/weeCee

Steven Smith of ProjectSpeccy.com reverse engineered this interface as a reaction to prices he saw online for the original Mikro-Gen hardware. It’s not a very complicated piece, just an EPROM and an IC with a joystick connector at the top with a few diodes. The original is a single sided PCB and is routed for convenience (more of that later).The components were laid out in a KiCad schematic and each connection traced until he had built up a complete schematic. He also took the opportunity to recreate the original logo to add to the boardPlease note that the ROM on World of Spectrum will not work with this bpard because it has been descrambled for use with emulators. Thanks to Russ, Jerzy and Matthew Logue who supplied a ready-to-run scrambled ROM image which you will find on Stephens Website. You will also find the TZX files of the game for convenience and also an .MDR file for those lucky enough to have a vDrive ZX.This project is shared here with the express consent of the designer Stephen Smith. We hope this project enables those who could never obtain the original or refuse to pay the ‘Retro’ prices demanded these days, to play the game as it was originally intended.DIP sockets need to be low profile and the ZX Spectrum connector needs to be installed at the outer length of it's pins.The correct ROM image can be found here: http://projectspeccy.com/Projects/SotU/ShadowOfTheUnicorn_Obfuscated_ML.ROM.zipHappy Creating!

A 4 in 1 cartridge running OSS's MAC/65, Action!, Basic XL and XE software.The PCB was drawn based on the OSS Cartridge and images at http://www.atarimax.com/jindroush.atari.org/acarts.html.The 4-in-1 Rom file was created using the OSS M091 type rom files shared at https://atariwiki.org/wiki/Wiki.jsp?page=Mac65*** 3D printed cartridge case will be available at thingiverse. Not finished yet ***Single rom file includes 4 OSS software.MAC/65 with DDTAction!Basic XLBasic XEComponents:27c5122pcs 74LS0274LS74DIP28 WIDE IC socket10μF capacitor100nF capacitor4.7K resistance2pcs 10K resistance2pcs 2pin 2.54 pitch male header (for selecting roms)2pcs jumper cap (for selecting roms)This PCBEprom programmerIn order to protect your electronical devices, always turn off your ATARI before inserting or removing cartridges.ALWAYS TURN YOUR ATARI OFF BEFORE CHANGING/SWITHING BETWEEN DIFFERENT ROMS!If your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)

A replica of the Commodore 64 250407 1983 mother board, and a replica of the schematics made using SprintLayout and KiCad.The replica project was started by Michael K. (Der Alte Bastler) in 2019 to learn SprintLayout and the process of reverse engineering PCB. I finished it, importet it in KiCad, imported the KU motherboard schematics and modified it to match the 250407 Reb.B schematics.The board has been prototyped, and tested by me and Langwell Cowan.We are not the first to reverse engineer this board, but we are the first to share the design files online I think.More information at: https://github.com/bwack/C64-250407-Replica-KiCad

Raemixx500 is an Open Hardware remake of the Commodore Amiga 500+ mainboard, revision 8A.1, which fully passed all tests.For more information please see https://github.com/SukkoPera/Raemixx500.Differences from OriginalThe initial objective was to come up with a new mainboard as similar to the original one as possible, while including minor modifications that would improve its usability. This mainboard was designed with reasonable - not maniacal - accuracy to the original design. Most care was taken in the positioning of components that ought to be in a certain position (i.e.: screw holes and I/O connectors), to ensure drop-in replaceability. Other components and tracks are "more or less" there, but as the board was wholly laid out from scratch by hand, don't expect sub-millimeter accuracy.Some modifications were soon added in, in the hope that they would be useful. Let's make it clear straight from the beginning that most of these improvements and modifications are completely optional and actually disabled by default. This means that you can just ignore them and everything will work as it did on the original A500+ board. If you want to take advantage of them instead, you will need to do some work.Modifications introduced in V2Buffered Video Synchronization Signals: This will make the VSYNC and HSYNC signals going out from the DB23 connector somewhat "stronger", which should improve video quality and also allow using fully passive (i.e.: just wires) RGB to VGA cables (but please note that the signal will still be 15 kHz so a scandoubler will still be required with most VGA monitors). To enable this, cut both the JP99H/V jumpers, solder a 74HCT14 SOIC chip at U94 (yes, it's surface-mount, but the available space was limited) and a 100-330nF ceramic capacitor at C94. Note that if you want to get back to unbuffered (why???) you will both need to unsolder U94 and close the jumpers again, otherwise you will definitely damage your Denise and/or buffer. One small caveat: you'd better decide what to do with this mod before you solder the nearby components, as space around U94 is really tight and (un)soldering it with the other components in place is not a task for the faint-hearted.ESD Protection for the Joystick Ports: While connecting controllers blindly is still not recommended, you can add some diodes that should hopefully avoid damage to the internal chips whenever you do so. These won't hurt in any case, so why not? Just solder some AT1042 chips at U90-U93. Yes, they are small but you can make it.Hard Disk LED: If you use an internal expansion board that provides an IDE connector, you will feel the need for a LED flashing whenever the disk is accessed. If you connect a wire from pin 39 of your CF adapter to the new HDACT connector right in the middle of the board, the Floppy light will also flash when the hard disk is accessed. To get this to work, solder a 2n3906 transistor at Q99 and resistors R98 (10k) and R99 (4.7k).Alternative Footprint for the Line Filter: The original line filter (LF1) was probably a custom part, but in any case it's impossible to find these days. Luckily a functionally-equivalent part is available (Laird Z131B-10) but it has a different footprint, so the latter was added at LF99. Be very careful when soldering this, as it is very easy to make a solder bridge between the pads of LF1 and those of LF99 and short out the power rails.Alternative SMD Footprints for the JFETs: Q321/331 are a bit hard to find these days in the TO-92 package, so alternative surface-mount SOT-23 footprints were added (Q921/931). Choose the package you prefer and only solder one of each.More Accurate Dimensions: While V1 was already pretty close to the original board, the new version should be right on the money. Placement of the audio and mouse ports was also improved.More Detailed Silkscreen: The values of all resistors, capacitors and chips are now printed on the silkscreen, which makes the assembly process quicker and less error-prone.Improved Routing and Ground Plane: Some tracks were slightly altered in the hope of achieving improved signal integrity. Lower impedance to ground also resulted in all chips running a few degrees Celsius colder.One more change lies in the license: the project is now released under CC BY-NC-SA, which is not too different in practice from the license we were using before, except that any commercial use is now prohibited. I know this makes the project non-free, strictly speaking. While I am sorry for that, that's what the behaviour of the "community" has led me to. Blame them, not me.

As a child I have owned an Atari 800XL. This 8-bit computer always had a special place in my heart. After almost 35 years I have decided to dive a bit deeper into the circuitry of this now called retro computer. What better way to start than to remake the PCB from scratch.This is a revision with the fixed mistakes from my original design.

Featuring 10bit 40msps real-time capture output over USB 3.0 the Domesday Duplicator strikes a balance between functionality & cost-effective RF capture for saving RAW information for post-de-modulating and rendering over conventional setups nearly everything can be done after the fact in software and the best thing its all 100% open source.LD-Decode is software built for the preservation of Laserdisc by capturing the raw RF from the disc. The Domesday project and the Domesday duplicator, meant to capture the BBC 1980s ‘’DomesDay’’ Laserdiscs, is an extension of LD-Decode. The capture hardware and software abilities have now been broadened for CD, VHS/S-VHS & U-Matic etc, in the future, it can be expanded to all RF media formats such as Betacam & HI8 so capture today decode tomorrow.For all the detailed information and starting origins of the project please look at the links below.Current Information Summary And Use of Software side - By Harry Mundayhttps://docs.google.com/document/d/1ZzR3gbW6iSVSNP0qoDIS0ExeRecKehlTQ0EJyx2g568/edit?usp=sharingDomesday86 website and Offical GitHub for the duplicator:https://github.com/simoninns/DomesdayDuplicatorhttps://www.domesday86.com/?page_id=978This is an open-source project I am bringing here to spread visibility and accessibility more to the public and fellow video/archival enthusiasts!All profits from this will go back into R&D and help others obtain such hardware and help develop it more!

This is a Spartan Edge Accelerator shield which implements all the hardware connections needed for zwenergy's gbaHD, no wires required! The PCB incorporates the GBA motherboard, Arduino Nano, and SNES controller port used in a typical gbaHD installation, and interfaces directly with the Spartan Edge Accelerator board via pin header connections. For more info, please visit my GitHub repo!

This is a Commodore Amiga 1000 A1050 front 256k chipram module. This is a open source project by TOD.uses This has TWO updated 65535 word byte TIL chips that allow you to use 120ns 64kx4 18pin dram versus the 150ns that originally came with the Commodore A1050. The ram is now in sockets so you can replace any bad modules. PLease use known good ram sources. if you have fake or bad ram the board will just get hot and the A1000 power light will blink. see my video below to watch me have this issue and get it resolved with quality ram. The open source project for this design and usage licensing is here https://bit.ly/3EDfCRhyou can watch the full project creation, build from PCBway, and its testing and working implentation to see it in action here:

SDBOX (A parallel to sd-card project for the Amiga) parallel2SD on amiga 500https://www.youtube.com/watch?v=cdjNlg5xI-g Amiga500 WB 1.3 whdload via JST , sdbox (microsd parallel Port hdd)https://www.youtube.com/watch?v=VQdrOjCI9As MIGs Yesterchips - Folge #097 SD-Boxhttps://www.youtube.com/watch?v=AxWvHaGmrwsFor more information: https://github.com/jbilander/sdboxBOM, now verified!Please note, you don't need to populate C1 if you're not going to use the barrel jack. R5 is only needed if U3 is populated.***PART | Value | Description----- | ----- | -------U1 | | Arduino Nano V3U2 | | Micro SD-Card Adapter (with onboard bidirectional level shifter)U2 |Pin strip| 1 Pcs 2.54mm Single Row Male Pin Header Strip For mounting and connecting Micro SD-Card Adapter directly into base PCB. Cut out one with 6 pins and two with single pins. The current angled pins on module will be desoldered and removed.U3 |PVG612S| Solid State Relay, 6-SMD (0,300", 7,62mm) Automatic power down with the Amiga (optional)J1 |DB25 | DB25 Male MountingHoles J2 |5.5x2.1 mm | Barrel Jack Power Connector, center positive (optional)C1 |100uF-220uF| 1210 ceramic decoupling capacitor for VIN, 16 VDC or at least above you voltage input 7-12V. Not needed if powering via USB.R1 |4.7k Ohm| 1206 smd resistor (should give around 0.9mA when CS/SEL is high)R2 |4.7k Ohm| 1206 smd resistorR3 |120 Ohm| 1206 smd resistor (should give around 2.14V, 24 mA over D1)R4 |120 Ohm| 1206 smd resistor (should give around 2.17V, 24 mA over D2)R5 |330 Ohm| 1206 smd resistor (should give around 1.2V and 10 mA control current with the Amiga 47 Ohm in series from pin 14) Not needed if U3 not populatedD1 |LED 3mm| SD Activity LED, Diffused Orange / Amber, pitch 2.54 mm, 1.8V-2.3V, 20-30 mA, 605-610nmD2 |LED 3mm| Power LED, Green Diffused T-1, pitch 2.54 mm, 25 mcd, 565 nm, 2.2 V, 25 mAQ1 |BC847BW| Small Signal Transistor, NPN polarity, SOT-323Q2 |BC847BW| Small Signal Transistor, NPN polarity, SOT-323JP1 |Solder jumper| Enable this to reset Nano in conjunction with Ctrl-Amiga-AmigaJP2 |Solder jumper| Enable this to use barrel jack connector without U3 chipNoteI take no responsibiltiy for any damage to any equipment that results from the use of this board.USE AT YOUR OWN RISK!

Hello,This is a tested and working circuit. (Tested on Amiga 500 and Amiga 600 with FlashFloppy* firmware installed GOTEK floppy disk drive emulator (SFR1M44-U100 and SFR1M44-U100K).)This adapter heps you to connnect; FlashFloppy* firmware installed GOTEK floppy disk drive emulator (SFR1M44-U100 or SFR1M44-U100K) to your Amiga 500, externally as DF:1 (from Amiga 23 pin disk drive connection).*For information about, FlashFloppy firmware installing to Gotek drive, you can look at the links below.https://github.com/keirf/FlashFloppy/wiki/Firmware-Programminghttps://github.com/keirf/FlashFloppy/wiki/Firmware-Programming#method-2-usb-programminghttps://www.youtube.com/watch?v=yUOyZB9cro4Optional Hardware mods:https://github.com/keirf/FlashFloppy/wiki/Hardware-ModsThanks to Keir Fraser for FlashFloppy project. https://github.com/keirf/FlashFloppyComponents:34pin DC3 2.54mm Pitch Jtag Isp Male Socket Straight IDC connector (2x17 Male Box Header)4 pin male header34pin (2x17) pin FDD female-female cable4 pin dupont female-female cable (For power connector)DB23M 23 pin D-sub male connector**FlashFloppy* firmware installed GOTEK (SFR1M44-U100 or SFR1M44-U100K)Instead of male headers + female-female dupont cables, you can use male-female dupont cables and solder directly to PCB.Do not forget to setup the jumper position on the GOTEK. (Only S1 cap must be installed)** There are several methods to obtain 23 pin D-sub male connector:25 pin D-sub male connector's pins and the 3D model link below.https://www.thingiverse.com/thing:1238286Or you may chose this method.https://archive.org/download/db23m/DB23M.jpgYou can find the first (non IDC) version from here. PS: With Kickstart ROM V1.2 and V1.3 you may need AMIGA 500 - SWITCHLESS BOOT SELECTOR to boot from external drive.Ps. While transfering data (reading or writing) from SD cards or USB flash storages it should not be interrupted like power-off or Reset systems. Otherwise that may damage memory chips.In order to protect your electronical devices, always turn off your Amiga before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.

Atari 5200 consoles with controller problems sometimes need their POKEY adjusted to center the controller. There are several discussions on AtariAge such as: https://atariage.com/forums/topic/300217-considering-a-5200-system/page/2/?tab=comments#comment-4749780It can be done with a loopback connector and a test cartridge or roughly with Missile Command.This will serve as the loopback connector but will also let you test your console to make sure all the buttons are registering, and let you turn the potentiometers to see the effect - but it would make the worst controller ever. It can be useful if you have a Wico Joystick or similar that uses a Y connector to get the keypad function from a 5200 controller. This will serve as the keypad.

Hardware design of a cartridge for the Commodore 264 series of computers - Commodore 16, 116 and plus/4This is the hardware part that accompanies the project of Magic Cartridge GeneratorThis project is free to use and you can use any PCB manufacturer by downloading the Gerber files, but if you would like to support my work and help with further hardware development you can order these PCBs on PCBWay.Hardware DescriptionOriginal Commodore 264 cartridges could be up to 32 Kb in size, in two separate banks of 16Kb. This cartridge implements a latch which is tied to a memory address, so it can address (in this incarnation) up to 2 megabytes of data (128 banks of 16Kb). In that regard, it is very similar to Magic Desk or Ocean cartridges for the Commodore 64.EPROM is selected by the C1LO selection line coming from the computer, and the 16k of data from the selected bank is visible in the memory map at addresses $8000 - $BFFF.Inputs of an 8-bit latch (74LS273) are connected to the data lines. A GAL20V8 is responsible for decoding writes to a memory address by decoding the full address bus. Decoder has the option of decoding several frequently used addresses for banking cartridges, since there is no standard address defined. This cartridge is primarily designed to enable making onefile program compilations through the Magic Cartridge Generator.The PCB was designed to accommodate various types of EPROMs and their FLASH variants. The smallest EPROM you can use is 27C010 (128Kb), and the largest is 27C160 (2Mb). There are two EPROM sockets, but you cannot use both at the same time. The left socket accepts standard 8-bit EPROMs and their FLASH variants (27C010 to 27C080) and the right socket is for 27C160 (16-bit EPROM in 8-bit mode).Address decoderThe address decoder is implemented in GAL20V8. All 16 address lines, /PHI2 and /RW are connected to the GAL to enable single-address decoding. Of course, a GAL16V8 could have been used, but it would only be capable of decoding an address in 16-byte blocks, or the address decoder could be implemented in TTL logic which would require at least 3 ICs. Two spare inputs were used to create a selection jumper to select between four commonly used addresses for cartridge banking. The default address used is $FDFE, which is mentioned in the document at http://solder-synergy.de/plus4/hardware/makers/ioarea.txt as "Register on EPROM-card". Other addresses which can be configured are $FE00 (used on a Hungarian homebrew cartridge found at http://www.commodoreszerviz.hu/c16-116-plus_4_1mb_catridge_juhasz_jacint.htm), $FDA0 used by another homebrew cartridge, and $FD17 which is also mentioned in the document above as "Register for EPROM-/sRAM-expansion".The address decoder is configured with a solder-jumper on the bottom side of the PCB. The configuration legend is also shown at the bottom. Use extreme care when trying to bridge the pads (if needed, as the default configuration is already selected when the jumper is open) because you can easily lift the pads with excess heat.EPROM selection jumpersIn order to support most common types of EPROMs and FLASH EPROMs, two solder jumpers have been placed on the bottom side of the PCB. They look like this:These jumpers HAVE to be configured before plugging the cartridge to your computer! Different types of EPROMs and their FLASH variants have some pins swapped, and if you are using a chip smaller than the maximum size, the unused address lines have to be pulled high on the EPROM side to ensure proper functioning.You can use either the left 32-pin socket, or the right 42-pin socket, but never the both at the same time. The right socket is meant for using the 2Mb 27C160 EPROMs. This is a 16-bit EPROM but it can be forced to work in 8-bit mode by connecting the BYTE/Vpp pin to ground. In that configuration, the address lines are shifted by one and the output Q15 is used as address line A0. These 16-bit EPROMs are not directly supported by the popular TL866 programmer, and have to be programmed through an adapter, in multiple passes. An example adapter can be found here or hereGAL programmingIn the GAL folder there are both .pld and .jed files provided for GAL programming. You can also use a programmer such as TL866 to program the GAL. If you want to change anything in the decoder, you can use GALASM to recompile the .pld file.CapacitorsThe capacitors are not needed, but you can populate them. They are 100nF 50V MLCC or ceramic capacitors with 2.54mm raster.Enclosure compatibilityThe PCB is designed to be as close in dimensions as the original Commodore PCB, so you can re-use an original Commodore cartridge case, or you can 3D-print one. Compatible designs are available on Thingiverse, such as this one or this one. Unfortunately, no one makes injection-moulded cartridge cases for the 264 series anymore.c264-magic-cart is Open Hardware licensed under the CERN OHL v. 1.2, released by Marko ?olaji? in 2021. You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2.