Based on the mt32-pi project, bringing you the auditory excellence of the Roland MT32 in an obtainable package that won't cost more than my current car. Widely considered to be the ultimate in retro MIDI-modules, it's the audio card every 90s PC gamer eventually found out was never actually an audio card and instead its own thing completely separate from your computer. The BulkyMIDI-32 is simply my attempt at building something that would look nice on my desk while playing those classic Sierra and Lucasfilm games, it is just a set of PCBs and all using through-hole components so if you own a kitchen table and a soldering then you should be able to build one.This is the main module, check out the related shared projects for a listing of all additional modules as well as any adapters that you might need. These provide additional functionality beyond what you will need to use it as a MT32-PI, and so I recommend that you take a look and decide what you will need. The BulkyMIDI-32 Extras-board in particular provides a passive audio mixer, additional MIDI OUT and THRU ports as well as MIDI-connectivity over RS-232. In order to build a device that looks exactly as shown, you'll additionally need the PCBs for the following shared projects:BulkyMIDI-32 ExtrasBulkyMIDI-32 Module PanelBulkyMIDI-32 Module FP1BulkyMIDI-32 FB2Over time I've also expanded the project to include a standalone player for MIDI-files (Play), a sixteen channel monitor that lights up depending on channel usage as well as a simple audio switch in the same styling. If like me you grew up using software audio players looking like separate audio modules, now you can actually start building one in real life! A small demonstration is included below, but please excuse the audio quality as this was shot using my mobile phone.I've also taken the time to create a video looking back at various designs that I've worked on during 2022, the BulkyMIDI-32 is featured there as it has been one of my obsessions for the past year. The parts relating to the BulkyMIDI-32 in particular begins at 1:37.

Computers and consoles using RBG video standard depends on the availability and cost of CRTs (Cathode Ray Tube) or LCD monitors that support low horizontal sync (15Khz) which are scarce or the use of converters that are expensive or produces deformation of the image and response time.Open source options are either invasive or complex, requiring to open the computer or use layers of SBC (single board computers) and CPLDs / FPGAs With the appearance of the RP 2040 line of microcontrollers and the use of their capabilities, it was possible to consider a development that previously remained in the field of FPGA-based solutions such as OSSC or SCART converters, both of which have much higher final value and with limitations. in rendering fidelity (scaling) or in latency.This project relies on the usage of the PIO (Programable IO) in order to delegate fast and cycle perfect processes that requires interaction with DMA and IRQs.4 state machines are used, 3 for the TMDS and 1 for the ADC capture.Features:HDMI modes: 640x480, 800x600, 960x540, 1280x720, all 60HzCapture mode: 320x240 16 bit color, 640x240 8 bit colorSimple USB drag and drop updateIntegration with companion app to control and capture images3 key keyboard (previous, next, action) and a resetOn Screen overlay menu systemMax 24 bits color density, 18 bits on current HWTested on:Commodore 128, Amiga 500, Amiga 1200, Atari ST 520Use Mode1.Connect retro computer through RGB video with its 2x5 , connectors can be provided2.Power device through USB3.Configure screen with buttons (alpha)a.S2 Button : Alter between X and Y axisb.S3 Button: Move left of upc.S4 Button: Move right or downd.Pushing S3+S3+S4: Activate USB4.Console use:a.Connect through USB with PC/Macb.Open a Serial port application (putty, arduino/monitor)c.Configure 115000 8N1d.Use comands with the following shape: <command> <space> <value> and hit enterUSB CommandsThe USB commands allow you to speak directly with the microcontroller to command it, it is necessary (momentarily) to activate it by pressing the S2+S3+S4 buttons.The USB mode affects the stability of the image, that is why it must be activated and is in test mode.The list of commands may change in the future as needed, but at the moment the ones that are supported are:up: Move screen up, argument must be an integer (up 1)down: Move screen down, argument must be an integer (down 1)left: Move screen to the left, the argument must be an integer (left 1)right: Move screen to the right, the argument must be an integer (right 1)info: show info menu, argument must be true/false (info true)capture: capture the current screen in csv format. (capture)id: display the unique device id (id)version: show the version of the device (version)

LittleSixteen is an Open Hardware remake of the Commodore 16 home computer, featuring many improvements over the original design.In V3 we started making improvements to the board:Switched to external power regulation, using the C64 connector and power supply: drastically reduces the heat inside the case, which is one of the main CPU/TED failure causes.Added current-limiting resistors on all ports exposing power pins: this will avoid short-circuiting the power supply, whatever you do on the external connectors.Added internal Joystick port buffers: this is basically like having two OpenC16JoyAdapters built into the machine, preventing the TED pins to be directly exposed on the joystick ports, which is another common cause of TED failures. It also gives the ports a fixed ground, allowing the use of "advanced" joysticks with autofire functionalities for instance, which require power from the machine.Joystick ports now use DB-9 (more properly: DE-9) connectors, just like any other machine of the era: you can now use your favourite C64/Amiga joystick on your C16.Similarly, the Datassette port was changed to the C64-style edge connector. An adapter to keep connecting the 1531 Datassette is trivial to make.Moved to the C64 power switch, since this can still be found on the market and is functionally equivalent.The CPU can now either be an original 7501/8501 or even a 6510, thanks to Andrew Challis's adapter being integrated on the board.In a similar fashion, the board can either directly accept an original MOS 251641 PLA or Dani?l Mantione's GAL16V8-based reimplementation.The design flaw that prevented the usage of cartridge-based RAM expansions was fixed: you can now plug in an OpenC16RamExpansion without the internal RAM fighting with it.Actually that might not even be necessary, as the board now directly supports either 16 or 64 kB of internal RAM.Since the RF modulator is basically useless these days, a replacement circuit was integrated on the board, providing either Luma+Chroma (say S-Video) or Composite Video.Added the possibility of combining the KERNAL and BASIC in a single all-in-one ROM: this allows replacing the original power-hungry chips with a single W27C512, which can also incorporate the Plus/4 function ROMs.ESD protection was improved on all ports.For more information, please check out the GitHub Project Page and the Development Blog.

Universal retro computer emulator based on Raspberry Pi PICOFirmware and sample games are in "Other files" All components values are printed on PCB Board is universal and you can run 3 different software projects:Retro computer machine emulator MCUME https://github.com/Jean-MarcHarvengt/MCUMEMiroslav Nemecek PicoVGA http://www.breatharian.eu/hw/picovga/index_en.htmlPICOZX128 with USB OTG for full keyboard and USB joystick/gamepad https://github.com/fruit-bat/pico-zxspectrumThis project share mainboard/motherboard only, you need alsoBottom https://www.pcbway.com/project/shareproject/RetroVGA_bottom_board_ba53be65.htmlFront https://www.pcbway.com/project/shareproject/RetroVGA_front_panel_e1a67e9b.htmlSide https://www.pcbway.com/project/shareproject/RetroVGA_side_2x_5cf80926.htmlYou can use also mainboard only, there is printed all button names on board,this "standalone version" can assembly with bigger 12mm x 12mm buttons on arrows and fireLatest board with PCB enclosure:FEATURES:Smallest as possibly 175x75mmAbsolute minimum components.QWERTY keyboardAccess to boot buttonVGA outputPiezo SpeakerReset buttonmicro SD card9pin DSUB ATARI joystick connector (you need reduce cable to cca 30cm)USB host / OTG for PICO ZX emulator to connect USB joystick or keyboardMCUME emulators are very basic, no save state, no configuration, only select games from card.Not all games works, there can be some screen issues, flashing sprites, freezes, unexpected resetsGame console systems supported:Atari 2600Odyssey/VideopacColecovisionAtari 5200Computer systems supported:Zx81Zx spectrumAtari 800C64BASIC MINIMAL PARTS1x Raspberry PICO37x DTS63K or another tactile switch 7mm height n switch force is highly recommended2x 2K 0603/ 0805/ TH Ø1.8x3.2mm2x 1K 0603/ 0805/ TH Ø1.8x3.2mm2x 470R 0603/ 0805/ TH Ø1.8x3.2mm1x 820R 0603/ 0805/ TH Ø1.8x3.2mm1x 390R 0603/ 0805/ TH Ø1.8x3.2mm1x 82R 0603/ 0805/ TH Ø1.8x3.2mm1x DSUB15 FEMALE1x DSUB9 MALE1x SD card SMD1x LD-PZPN-3510 or another piezo speakerNEW case preview:GAMEPLAY:ALL PCB parts:Native Hi res PicoVGA by Miroslav NemecekProject PicoVGA: http://www.breatharian.eu/hw/picovga/index_en.htmlPicoVGA schematic:PicoVGA library features:1 base layer and 3 overlay layers with transparency, using the PIO0 module8-bit output in R3G3B2 formatVGA monitor output in 256x192 to 1280x960 resolutionoutput to a TV in PAL or NTSC interlaced mode at resolutions up to 1024x576 or 848x480nearly 30 frame buffer formats: 8/4/2/1 bit graphics, tiles, text, special formats (charts)colour palettes for text modes and graphics formats with limited bit depthframe buffers of different formats can be combined together in strips and segments in the imageRLE image compression (suitable for drawings)transparency modes with selectable key colourhardware sprites in overlay layerslayer output only to designated output pins (color planes)automatic configuration of the video mode according to the specified resolution and timingautomatic overclocking of the processor according to the desired resolutionthe library uses the 2nd core of the processor, the 1st core is reserved for the main programadditional PWM audio output (not required)MCUME Status and known issues64 (C64):Full speed with soundI2C custom keyboard support!(only few games working)colem (Colecovision):Full speed with soundvcs (Atari 2600):no sound yetlimited cartridge size support (due to ram constraint)o2em (Videopac/Odyssey):no soundonly videopac G7000 games supported (due to ram constraint)speccy (Zx spectrum):SNA support (Z80 to be fixed)YM and preliminary buzz sound support48k games only supportedkempston joystick supported but on screen keyboard may not answer in some games81 (Zx81):zx80 and zx81.P, .81 and .80 format support (rename .56 for Zx81 hires game that requires 48k or more)I2C custom keyboard support!HIRES support for zx81zx80 supportYM sound support for zx81800 (Atari 400/800/XE/XL):.rom support (no floppy yet)I2C custom keyboard support!Full speed with soundPICOZX128RetroVGA and Picomputer keyboard mappingsTrying to squeeze in all the key mappings is tricky but here is an attempt.These are the nomal key mappings:These are the mappings with the ALt key down.:Shifted and numeric mappings are turned on and off using the arrow keys (up, down, left, right). QS1, QS2, ... save the emulator state to the appropriate Quick Save slot.If there is a save in QS1 it will load after the emulator is powered-on or reset.The SN keys load snapshots as if they are in a loop. SN loads the current snapshot, SN- load the previous snapshot and SN+ loads the next snapshot.These are the mappings with the numeric shift on:Alt+V sets the arrow keys to behave like a Kempston joystick, Alt+C sets the arrow keys to operate the Spectrum cursor keys.RetroVGA kiosk modeKiosk mode disables the menu system and quick-save buttons. Kiosk mode is enabled by placing the following file on the SD-card:zxspectrum/kiosk.txt It supports the following:USB keyboardUSB joysticksMatrix keyboard (6x6)VGA video (RGB332)PWM sound (1 pin)SPI SD cardHere are the pin assignments:Raspberry Pi Pico - CHECK Warning!RetroVGA utilizes overclocking of the Raspberry Pi Pico. It has been found that some Pico do not run at the required 250Mhz.Please undertake the following check before soldering the board.1. Upload the firmware as detailed in the Uploading binaries to the Raspberry Pi Pico section of this guide.2. If successful, the Pico onboard LED should flash.3. Unplug the Pico and then plug in again.4. If the onboard LED flashes again then the board is ok to use.5. If not, do not solder the board, unfortunately the board you have cannot be overclocked. Soldering the components should be relatively simple for those with some soldering experience and access to suitable soldering tools. Note that there is an SMD component (this is limited to the SD card reader), even if you have chosen the through hole option for the resistors. If you are not experienced with SMD, take your time, and relax. I recommend good magnification; you can improvise a microscope from a cell phone - in video mode at maximum zoom to help! Bobricius has some useful videos on his YouTube channel. Start by studying the PCB, both sides and the location of items. I like to perform dry fits where needed so that you have an idea of where everything should go and what might get in the way when soldering. There is no complication with the polarity of the default components on this board, so one less thing to worry about. For the Raspberry Pi PICO installation, I recommend using temporary header pins or bent wire pins to locate and align the board. Make sure the board is in the right orientation, tack in place then remove the temporary pins and solder all edge holes to finish. Note that you could socket the Pi PICO for removal, by using female headers on the board, but this will mean you cannot install the front plate, as it will be too high for the button access.I recommend the following sequence when soldering the board together, starting with shortest height items first:1. SD card Reader2. Resistors3. Raspberry Pi PICO (don’t forget to check firmware before soldering)4. Tactile switches5. Piezo Buzzer. If using the piezo buzzer don’t forget to close the solder jumper as marked on the back of the main board.6. Turn board and install joystick and VGA sockets. RETROVGA schematic:References and CreditsHardwareby BobriciusSoftwareMCUME: https://github.com/Jean-MarcHarvengt/MCUMERefer to Credits at this link for emulators.Pico VGA hardware and software Miroslav Nemecek https://github.com/Panda381User GuideAdamT @AdamT117 https://twitter.com/AdamT117

YAKS2-TITUO is an "Intelligent" kickstart switcher for the Amiga A500-A600-A2000 and A1200-A4000, with unique features:A500/A600/A2000 version Can switch among four or eight different kickstarts Kickstarts can be flashed at any time by mean of YAKS2 adapter and any common chip flasher, capable of managing 29F080 chips Kickstart selection by mean of CTRL-A-A without the need of any additional wiring inside Amiga Keep track of the selected kickstart upon poweroff Optional audible kickstart selection confirmationA1200/A4000 version Can switch among two or four different kickstarts Kickstarts must be flashed before board assembling (not re-flashable) Kickstart selection by mean of CTRL-A-A without the need of any additional wiring inside Amiga Keep track of the selected kickstart upon poweroff Optional audible kickstart selection confirmation YAKS2-TITUO R03.1al https://github.com/EmberHeavyIndustries/YAKS2-TITUO#yaks2-tituo-r031al Suitable for A500, A600, A2000Kickstart images can be flashed at any time (by mean of YAKS2->29F040 adaptor)Firmware cannot be upgraded via ICSPKickstart selection by CTRL-A-A, support both AUTOSENSE (no additional wires) and RST methodsCan connect an onboard buzzer for audible kickstart switch and named selection evidenceVisible kickstart switch and named selection evidenceSmall footprintCan switch among 4-kickstart-images or 8-kickstart-images YAKS2-TITUO R04.1bl https://github.com/EmberHeavyIndustries/YAKS2-TITUO#yaks2-tituo-r041bl Suitable for A1200 and A4000Kickstart images cannot be re-flashedFirmware CAN be upgraded via ICSPKickstart selection by CTRL-A-A, support both AUTOSENSE (no additional wires) and RST methodsCan connect an external buzzer for audible kickstart switch and named selection evidenceVisible kickstart switch and named selection evidenceSmall footprintCan switch among 2-kickstart-images or 4-kickstart-images