Zx spectrum pcb. 0MHz resonator at X200.

Zx spectrum pcb. These were held on two separate 16K ROM chips on the PCB. shtml). Instead, it uses a completely new design, which makes possible to integrate more functions inside the CPLD, thus minimizing real state on the PCB and number of components. ZX Composite mod schematic (V2) This didn’t take long to design v1 and a couple of weeks to arrive from PCBway. Not only should TR4 be rotated but also TR7. Here you’ll find schematic and layout information for various models of the ZX Spectrum. Fifty 7mm tactile switches give the tiny QWERTY keyboard its clickety tactility. PCB is the same size as ZX Spectrum 48, can be fit in 48K or 48K+ case. And it works! Date of manufacture (batch): The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces. We can recreate this using 13 touch pins, so it just about fits onto an S3. (I get the impression it The PCB has some buttons which can act as a joystick or the ZX Spectrum cursor. This was a technology pioneered by Ferranti, of which Sinclair was one of the first adopters (incorporating all of the discrete logic of the ZX80, plus a NMI generation circuit into the initial ZX81 2C158E ULA). ON ON ON ZX Spectrum 128K. ‘ Weird’ modification In the previous post I mentioned the ‘ weird’ modification to the Issue 3B motherboard. Ideal for installing in an aftermarket Spectrum PCB without needing an original ULA. It will work with the Harlequin or standard Spectrum. This is a basic 48k/128k ZX Spectrum emulation on the RP2040 with DVI output. Gerber was produced from a shared EAGLE file on Github. Jun 18, 2019 · 5. It was created on the basis of the last version of the board - "ISSUE 6A" - which was mounted in both Spectrum 48k and Spectrum+. The ROM will come programmed with the “JGH” Update ROM which contains a BIOS update, bug fixes from the factory ROM, and some new features like black background and white characters. Lowry] has just dropped an exciting build. Based on the ZX Spectrum breakout board. These are C44 and C45, and are rated at 100uf at up to 16v. Our goal is to have a canonical list that people can rely on when ordering parts for building an own ZX Spectrum mainboard. Last update: 24 Aug 2024 Stonechip Electronics ZX Spectrum (complete PCB and keyboard) fits inside case connected by ribbon cable. Apr 6, 2025 · The Harlequin is a clone of the 128K ZX Spectrum using standard readily available TTL logic IC's. Tested with an extensive suite of ZX Spectrum software (full list to follow). 1 – Issue 3B to 6A, and Supplement No. The edge connector then sits on the back side as well as the OLED so this is visible to the user. Allows you to load files directly from SD-Card. Two 'RESET' keys which are placed in positions close to commonly used keys, namely the 'A' and '0' (zero), which could have proved problematic. The ZX Spectrum sold over 5 million units and is credited with Technical References and Documentation ZX Spectrum Service Manual (includes Supplement No. Replace *all* the parts! Here’s what has been replaced in the 6a so far: Bad voltage regulator – replaced with Aug 28, 2024 · PCB designed to have all the components on the side away from the Spectrum to give more room. org/wiki/ZX_Microdrive) Hardware emulation of 8 microdrives for the ZX Spectrum only (no plans to adapt this for the QL). 54mm) pitch, 56-way edge connector that matches the ZX Spectrum's expansion port; these are getting harder to find and it's common to cut down a Mar 2, 2025 · Introduction When Sinclair released the original ZX Spectrum in 1982, it was designed with a chip called the ULA, short for 'uncommitted logic array'. zxdesign. Aug 31, 2021 · The PCB will fit in an original Sinclair Microdrive case (with a simple 3D printed bracket to secure the top) and receives all necessary power from the Spectrum or QL via aTSR-2450 9V to 5V converter. Aug 21, 2023 · By far the most common variant of the Spectrum 128, this has solder mask on the PCB underside only, like earlier 48K machines. PCB You can order the PCB from PCBWay. Unlike other interfaces, DivTIESUS is not based upon the reference design by Mario Pratto. If someone lifts off upper part of Speccy's case too enthusiastically connections between keyboard membrane and PCB may break. Luckily it has a full thro' connector so my board could go at the back. 5MHz resonator. This implementation provides o Layout for a cherry keyswitches o Power + optional utility LEDs for hard drive and Floppy disk. ZX Max 128 – ZX Spectrum Clone – Printed Circuit Board – PCB version 3. The ZX Spectrum ROM reads the keyboard via an interrupt routine, and so the ZX Spectrum interrupt generation must be tackled next. Contribute to alvieboy/ZXInterfaceZ development by creating an account on GitHub. This is a ZX Specrum Clone base on Harlequin by Chris Smith (http://www. The same as the ZX Spectrum composite mod board I designed it to fit into the original modulator case. 6. The Spectrum played a pivotal role in the history of personal computers and video games, especially in the United Kingdom. Low power consumption. You will then see a pair of ribbon cables, connecting the PCB to the keyboard: Just like for the ZX81, these ribbon cables don’t age well and break apart very easily. The board also features dual SPI flash memory, selectable via a The ZX Spectrum is an 8-bit personal home computer developed by Sinclair Research. Jan 3, 2024 · The ZX Spectrum was initially sold in 16 and 48K versions. (you need to provide these signals) o Digital logic/diode logic for composite keys as used on the spectrum+ keyboard o Optional header for remote cursor keys. The Hermit Retro ZX Spectrum board will be available in many options, as a bare board only, a DIY kit, and a fully-assembled model You'll receive PCBs, assembly instructions, and a bill of materials only in the bare boards only option. Every owner of the former version who continued using it, inevitably ended up wanting the upgrade to the latter. It’s main purpose is to improve the video output of the ZX Spectrum by seperating the luma/sync (Y) and chroma (C) signals to get rid of the dotcrawl. However, we do recommend recapping your ZX Spectrum to keep it running properly for years to come. Description divMMC Future – SD Card interface for ZX Spectrum Compatible with all Sinclair ZX Spectrums including the Spanish machines – Timex require a ‘Twister’ Frankly, you can’t Enjoy your ZX Spectrum without one No jumpers, no switches. However, this list may not be free of errors. A slightly updated design (May 2025) - now uses round pins that fit into Turned Pin type sockets. was 16K or 48K. The term ‘recapping’ means the process of replacing the electrolytic capacitors in your Spectrum. Jul 19, 2025 · I have inherited a pair of 48k Sinclair ZX Spectrums. This is PCB replica of the motherboard of a ZX Spectrum 48k 8-bit computer. The ZX Spectrum (UK: / zɛdɛks /) is an 8-bit home computer developed and marketed by Sinclair Research. It's main purpose is to improve the native video output of the ZX Spectrum by seperating the luma/sync (Y) and chroma (C) signals. Jun 13, 2024 · The keys on the keyboard are all capacitive touch pads - so they are just copper pads on the PCB. The hardware is being documented on hackaday. org/projects/zx_ula) PCB is half size of original ZX Spectrum, can be fit in 48K or 48K+ case. Utilizing […] Introducing the new ZX Spectrum NEXT N-GO, 100% compatible, same form factor. There's a jumper to select which ROM image is active (Spectrum internal ROM or ROM on the card) and a reset button (Press and hold reset and change the jumper over, then release Dec 4, 2023 · Computer systems supported: -Zx spectrum 48k -Zx spectrum 128k Features: -USB keyboard / joystick -Keyboard matrix 8x5 keys -USB joysticks -VGA video (RGB222) -PWM sound (1 pin) with AY-3-8912 emulation -SPI SD card -12 quick save slots -Load from . Contribute to UzixLS/zx-sizif-512 development by creating an account on GitHub. When completed this PCB will fit in to most original ZX Spectrum cases, new cases are available from many vendors online. 16K to 48K ZX Spectrum Upgrade Kit PCB Version - Fitting Instructions Dismantling the Spectrum: Remove the screws from the underside of the machine, hold the two parts of the case together and flip it over. It was one of the all-time bestselling British computers with over five million units sold. Jun 17, 2024 · Making a ZX Spectrum with full color PCB, ESP32-S3 and LCD display atomic14 wanted to try out the full color silk screen printing from PCBWay by making a modern take on a classic ZX Spectrum using an ESP32-S3 processor and an add-on LCD display: I’ve made a fully functional ZX Spectrum emulator with a built in keyboard. PCB is half size of original ZX Spectrum, can be fit in 48K or 48K+ case. INTRODUCTION The biggest problem in a rubber ZX Spectrum is its keyboard - because of its construction it wears out very quickly. The ZX-Key Keyboard is designed to be used a USB keyboard, a Serial keyboard and as Sinclair ZX series keyboard. It also has the option of working as a ZX DOS using a switch in which case all the ZX Uno/ZX DOS cores are available to the user. BOM 1 x 27C512 (E)Eprom 1 x 100nF capacitor 1 x 74HCT32 Optional sockets and switches/jumpers. The ULA implement is base on ULA chip for ZX Spectrum project by Rodriguez Jodar, Miguel Angel. C. Was originally supplied with ZX Power Supply, 2 x 3. 7. Thanks to the hard work of Pabb he has redrawn the Issue 3B board and has made Gerber files available for use with a PCB company to print and send to you. Guesser’s Spectrum Schematics page covers the +2A/+2B/+3 family with excellently detailed redrawn schematics. Standard R. Also includes:- CR2032 Battery, button caps , power switch and Joystick ports as requested, N-Go is a clone PCB of ZX Spectrum Next, 100% compatible, same form factor to use the same cases, it is a clone of the Issue 2B version also solves the problem of power and reset via HDMI and adds protection ESD. All you will need for a fully functioning computer is either an original rubber key ZX Spectrum case and keyboard or a ZX Spectrum Plus case and keyboard. First a series 2 with (at least) a bad ULA and a lifted trace to the Z80, and a series 6a with nearly everything fried… Believe it or not, I think I stand a better chance of getting the 6a running, so I started with that one. Despite having no experience with EAGLE prior Oct 17, 2022 · Superfo Harlequin 128 is a ZX Spectrum Clone. Jan 4, 2021 · On the underside, Stuart Honeyball, while laying out the Spectrum PCB, moved the address lines A8-A15 away from their ZX81 positions which would have been 13B-20B (11B-18B on the ZX81, the 8 th -15 th positions from the slot on the underside). These are PCB replicas of the motherboard of a ZX Spectrum 48k 8-bit computer. Mar 20, 2025 · DivMMC for ZX Spectrum computers running ESXDOS. It’s not just ZX Spectrums that deteriorate with age as my eyesight isn’t Jul 6, 2021 · Sinclair ZX Spectrum 48k+ before restoration. Similarly a 6 pin IDC header breaks ZX N-GO is a 100% compatible clone of the ZX Spectrum Next, maintaining the same form factor to ensure full compatibility with existing cases. Retro Isle - Retro games spectrum commodore amstrad 48k/128k ZX Spectrum for Raspberry Pico Pi RP2040 This project is intended to be relatively easy to breadboard or prototype in some other way. These schematic diagrams are based on a painstaking analysis of the Amstrad +2A/+3 service manual and Amstrad +2B/+3B service manual along with following circuit traces around the boards to correct where the original schematics had errors. 6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen 4675 11 ZX Spectrum InterfaceZ. Mar 26, 2023 · For the mainboard, an existing, redrawn ZX Spectrum 48 Issue 3B PCB was found and ordered from PCBWay. SNA snapshots directly from an SD card. The "Black +2" appeared soon after with an integrated tape Leningrad-2/top pcb/bottom How it looked assembled with an extended / duplicated keyboard The scheme of loading programs from a tape recorder from the scheme of the Belarusian clone ZX-Spectrum - "Baltik" TV connection Recapping your Spectrum If you don’t know what recapping your Spectrum means or why it’s important, I’ll first explain a few details. Component is never fitted. com. 6mm and switches height of 1. It presents a new, selectable ROM image for the machine, replacing the 1982 BASIC one found in the IC on the Spectrum's PCB. Feb 11, 2022 · Opening up the ZX Spectrum Let’s flip the ZX Spectrum, then remove and store the 5 screws from the back: Gently separate the top and bottom parts of the case. I have now swapped almost all components with a working computer, that way I know (or at least I think I know, correct me if I'm wrong) that the following components are ok: o Swapped Z80A - correct; o Swapped ROM (not 100% usre if that one works, but it came from another ZX Spectrum) - both seemed non-Hitachi, so the links could remain in the N-position, not the DB9-to-header connectors designed for retro computer emulation projects, including systems such as the ZX Spectrum, Amstrad CPC, and Commodore 64. DIY ZX Spectrum keyboard membrane / foil. This project is based on the Harlequin 128 ZX Spectrum kit, as supplied by ByteDelight. z80 snapshot files -Read from . It uses the pico-zxspectrum software to emulate a 48k/128k ZX Spectrum retrocomputer. For System G substitute 5. The board is designed to be universal for installation in the NEMO BUS slot or instead of the Z80 proce Nov 22, 2007 · Well I can do a little and complete the pics by providing some pics of a Issue 2 ZX 128K +2A witch as the full +3 pcb but of course with the +3 logic removed from the motherboard. Sinclair memory upgrade was a small pcb which plugged in on top of the motherboard P. Others believed it would be akin … Oct 14, 2021 · Another CPLD-based ZX Spectrum clone for 48K rubber case with some sweet features. Sync to video time Description Just a fun little newbie ZX Spectrum PCB design project - but may turn out quite usable! Jun 16, 2023 · Description ZX PicoIF2Lite - Sinclair ZX Spectrum Interface 2 Replacement Sinclair Interface 2 replacement including ROM Cartridge emulation using a Raspberry Pico Includes a single joystick port instead of the two with the original IF2. It was first released in the United Kingdom on 23 April 1982 and went on to become Britain's best-selling microcomputer. N-Go es una PCB clone de ZX Spectrum Next, 100% compatible, mismo factor de forma para usar las mismas carcasas, es un clon de la versión Issue 2B además soluciona el problema de la alimentación y reset a través del HDMI y añade protección ESD. While for the DIY Kit, it will come with PCBs, assembly instructions, and a full set of components including microSD cards. This chip combined a large amount of logic functions into a single custom-made package, significantly lowering the component count and cost. This is a ZX Spectrum 128 Clone base on CLPD EPM7128S. It became a defining product of the early home computing era in the UK, known for its distinctive rubber keyboard and vibrant color graphics. Uses Wren’s Amazing PicoDVI and CarlK’s Super no OS FAT FS for Pico libraries. Sep 10, 2020 · This is an exact copy of original retro machine - Sinclair ZX Spectrum 48. Username: Password: I forgot my password Remember me Hide my online status this session Nov 21, 2021 · Time to open KiKad and design my own board. Spectrum + machines sold by Sinclair were assembled with later issues of the Spectrum PCB, although Sinclair sold a conversion kit to owners of the rubber keyboard model to upgrade to the newer keyboard, and these are compatible with older issues of the PCB as well. PicoZX can also be used with a joystick; Ken showcases an Atari 2600 joystick in his build video. ZX Spectrum +2 (Grey) External Tape Input PCB This is a simple PCB layout for building circuit designed by JoulesperCoulomb, please watch the video for all the details. Sep 14, 2025 · ZX Spectrum PS2 keyboard Some time ago my friend gave me the nostalgic thing, which I can remember from my childhood - ZX Spectrum PCB ISSUE TWO from 1982. ZX Spectrum PCB Schematics and Layout are available from Spectrum for Everyone Issue 3B Schematics Issue 3B Layout Higher resolutions versions are available at z00m’s speccy corner. PICOZX - Handheld ZX Spectrum 128k + other 8bits from Bobricius on TindiePICOZX Retro Computing Platform Available Models PLEASE READ: Explore Our Product Family Check out our complete lineup of retro-computing devices: PICOZX VGA - Desktop model with ZX Spectrum-style keyboard, colored motherboard PCB, also fits into original case PICOZX-VGA PICOZX LCD - Handheld portable with IPS LCD, ZX Sep 29, 2016 · The PCB on the Spectrum is held down with just one screw near the centre. Based on the Issue 2B revision, it not only replicates the original functionality but also improves upon it by resolving the HDMI-related power and reset issues and adding ESD protection. The schematics have been re-drawn using the gschem schematic editor from the open source gEDA project. The ZX Spectrum motherboard. Aug 21, 2023 · This issue incorporates the 6C001E-7 ULA type, and also includes earlier service modifications to improve the DC-DC converter reliability directly on the PCB. 2 – Spectrum+ Description and Upgrade Procedure) ZX Interface 1, Interface 2 and Microdrive Service Manual ZX Printer Service Manual ZX Spectrum 128 Service Manual ZX Spectrum +2 Service Manual (Grey model with Here you’ll find schematic and layout information for various models of the ZX Spectrum. PCB is the same size as original ZX Spectrum, can be fit in 48K or 48K+ case. A. 5mm tape leads, RF (aerial) lead and 'HORIZONS' demonstration cassette by Psion. z80 snapshot files Read from . 16/48K Family Issue 1 Schematics and Layout (pdf) Issue 2 Schematics and Layout Issue 3 Schematics and Layout Issue 3B Schematics and Layout Issue 4A and 4B Schematics, Issue 4A Layout Issue 5 Schematics and Layout Issue 6A Schematics and Layout 128/Grey +2 Family 128 Issue 6U, analogue and digital side Plastic PCB pillars can be fitted through the 3mm holes at the top of the board to support the edge and keep the board level when plugged into a ZX Spectrum. ZX Spectrum S-Video Modulator Replacement from RetroAdventures on TindieWhat is it? This is a PCB which replaces the RF modulatorbox of a Sinclair ZX Spectrum computer. As on the Spectrum +2, two BASIC versions are implemented: the 48k BASIC to remain compatible with the original Sinclair Spectrum, and the 128k BASIC which was already introduced with the Spectrum 128. e. It was released in the UK on 23 April 1982, the United States in 1983, and Jun 8, 2025 · Find many great new & used options and get the best deals for ZX Spectrum Melodik 2 bare PCB at the best online prices at eBay! Free shipping for many products! * For ITU System I fit 6. It is one of the first self-made clones of ZX Spectrum in the Soviet Union. PCB version 3,32K RO Oct 14, 2021 · Superfo Harlequin 128 is a ZX Spectrum Clone. The switches will need to be hand wired and a cable made to run back to the matrix connections on the ZX Spectrum PCB. The Spectranet card gives the Spectrum an IP address so I could upload the TAP file to the Spectrum easily and quickly via a Lan connection. Dec 1, 2023 · The ZX Spectrum emulator just requires us to connect to the keyboard membrane ribbon cables. You can use parts from broken mainboard and bring them back to life ;) V6 Rev3 China PCB Prototype & Fabrication Manufacturer - PCB messageerror Jul 11, 2022 · This is a ZX Spectrum 128 replica in the form of ZX Spectrum 48 PCB. Capacitors typically found inside a ZX Spectrum. 0 license Dec 26, 2024 · This is a ZX Spectrum 128 Clone base on CLPD EPM7128S. Some late machines feature soldered Amstrad 40056 ULA’s instead of the usual Ferranti 7K010E-5. Jan 4, 2025 · ZX Spectrum Keyboard V2I made this keyboard for using with Superfo Harlequin 128, ZX Nuvo 128, ZX Max 128. There are two of these at each end of the keyboard to carry the row and column lines for the keyboard switch matrix. I searched for a joystick interface for the Sinclair ZX Spectrum that I was restored and found Yarek's joystick interface project. Mar 10, 2025 · If you’ve ever fancied building a ZX Spectrum clone without hunting down ancient ULAs or soldering your way through 60+ chips, [Alex J. General Information ZX Spectrum Models and some basic technical info on each ULA types – what’s compatible with what machine etc. They are a much cost reduced implementation of the Spectrum hardware, consolidating much of the functionality formerly accomplished by the ULA, various logic IC’s, PCF, Amstrad 40057, and HAL into a single QFP gate array (designated Amstrad 40077). preinstalled SD card € 74. Note there is no top-side solder mask The keyboard attaches to the spectrum via two flat ribbon cables You may notice a piece of wire soldered to my Z80 processor. 0MHz resonator at X200. Some of my speculations: In the USSR, the analog TV sets used SECAM, not PAL, so I imagine that the timi Due to a different PCB design, the issues caused by capacitors not performing correctly don’t really affect the Spectrum 128k, +2, +3 and +2A ZX Spectrum. † R45 position is shorted by pcb trace hidden under silkscreen line. 8″ IPS display soldered directly onto the main PCB is the screen for the device. Mar 23, 2025 · DivIDE for ZX Spectrum computer or clones. If it broke near PCB, you can cut foils and try to make a new "plugs" sticking hard pieces of Lower RAM replacement module for ZX Spectrum A PCB module for replacing all eight of the Spectrum's 4116 lower RAM chips with its onboard low power SRAM IC. Lost Retro Tapes used a 1:1 clone of the ZX Spectrum 48 Issue 3B. Nov 7, 2022 · Raspberry Pi Pico ZX Spectrum Microdrive Hardware Emulator (https://en. 579MHz oscilator for NTSC) Fix AY address for some Russia Games Use standard ZX Spectrum Adapter, 9V with center pin negative (- May 27, 2025 · ZX Spectrum 48k Mechtrum Keyboard with space bar A new 48k mechanical keyboard with full size space bar using the wraith keycaps. The ULA implement is base on ULA chip for ZX Spectrum project by Rodriguez Jodar, Miguel Angel (https://opencores. 5mm will disappear in the rubber mate with the nops in the middle. No-Soldering Sinclair ZX Spectrum 48k Composite Mod Tutorial - Use Sinclair ZX Spectrum on SCART! A Pico-based switchable ROM interface for the ZX Spectrum This is a ROM interface board for the ZX Spectrum. These connectors allow easy interfacing between class Aug 18, 2021 · Description Sinclair ZX Spectrum Kempston Joystick Interface As you know, Sinclair ZX Spectrum doesn't have a joystick port. They are ZX Spectrum clone. Aug 20, 2023 · RetroSix WikiBelow are several schematics for the various ZX Spectrum 128 models. ZX Spectrum 48 modern cpld based clone. M. Installation in Nemo BUS slot. It's main purpose is to improve the video output of the ZX Spectrum by seperating the luma/sync (Y) and chroma (C) signals to get rid of the dotcrawl. This PCB replaces the RF modulatorbox on a Sinclair ZX Spectrum computer. We will be using JLCPCB in the example below. It also includes dual SPI flash selectable through a switch, the main flash houses the ZX Jan 25, 2021 · A manufactured PCB for Droys original project for home brew ROM cartridges for the ZX Spectrum utilising the Interface 2. - Support ESP826 WiFi Module. Some timing issues were presumably discovered during layout, resulting in the /RAS line being routed through spare inverters to delay the signal (this is why Issue 4A and 4B machines won’t work with IC24 removed, unlike earlier models). The main keyboard circuit is almost identical to a ZX81s, with the addition of a Arduino Pro Micro enabling the ZX-Key to be used as a regular USB PC keyboard. Support for small hard drives and IDE to SD, IDE to SATA, IDE to CF adapters. It's just for fun and not a highly accurate emulation; hopefully it is good enough to be enjoyable. Dimensions 256 x 99 x 3. Contribute to linker3000/ZX-Spectrum-ROM-and-Joystick-Board development by creating an account on GitHub. It is a significant redesign from the original ZX Spectrum 128 and ZX Spectrum +2 models, with additional memory paging capabilities to support CP/M and additional ROM containing the +3DOS disc operating system code. Oct 6, 2024 · The Snapshot Game Interface for the ZX Spectrum 48K includes an SD card slot for loading . vLA82 installed in an issue 4S Spectrum vLA128 1. Full size space bar. Jan 23, 2024 · A 2. May 23, 2022 · The complete vLA family (so far) vLA81/82/128 now all available on SellMyRetro…. It use original ULA or any replacement. Tech specs:* Half-sized PCB for 48K rubber case* Pentagon, Spectrum 128, Spectrum 48 and Spectrum +3e modes* Altera EP Jun 20, 2021 · AY-3-8910 Kempston ZX Spectrum 2 Layers PCB 70 x 90 mm FR-4, 1. - Has Bridge Diode so it can use with any 9V adaper. They were created on the basis of the last version of the board - "ISSUE 6A" - which was mounted in both Spectrum 48k and Spectrum+. It also can be used with original ZX Spectrum or other clone. Before I get into the detail, a tool which I found essential was a magnifying headset. For more details on the project, including the code and firmware for the Pico, please see the GitHub site Jan 21, 2022 · Includes wiring information for the RP2040. Since no components are provided in The original ZX Spectrum had a grey rubber keyboard which pressed down on a touch sensitive matrix similar to its predecessor, the ZX81. An OLED display provides basic status information, while the game list is shown on the ZX Spectrum's screen. Problems: Requires TR4 mod for misplaced transistor. Contribute to konkotgit/ZX-48-Spider development by creating an account on GitHub. May 12, 2025 · The Sinclair ZX Spectrum is an 8-bit home computer released by Sinclair Research Ltd in April 1982. Z70830 These PCB’s are to be found in Spectrum +3 models (and some very early Spectrum +2A’s). wikipedia. For here for more information on the JGH ROM By setting various jumpers the EEPROM can be erased and re-programmed with Jul 21, 2018 · The PCB its original state. Introduction The heart of the ZX Spectrum series of computers is a custom chip called the ULA (Uncommitted Logic Array). I added a reset button to this beautiful zx Spectrum keyboard intended for a Harlequin project. io … Nov 27, 2022 · ZX Spectrum ROM card. Schematics for both will follow. [Tito] has grabbed the faithful black plastic box and turned it into a frequency counter as an innovative Jun 13, 2020 · c0pperdragon the designer of the component mod for the Commodore 64 (C64) now has a sister project designed for the ZX (Zed EX) Spectrum family of British micro computers. This is an unpleasant situation for retro gamers. About Keyboard for ZX Spectrum based on 48p-KDLX scheme, but used Cherry MX and atypical formfactor Readme GPL-3. 1 mm (length/width/height) while pcb height is only 1. After the vLA1 was completed I set myself a challenge to replicate the functionality of some of the other Sinclair ULAs, firstly the ZX81 followed by the ZX Spectrum and finishing with the Toastrack ULA (as this would leverage most of the ZX Spectrum ULA design). ZX Spectrum 48k+ mainboard before restoration. Spectrum compatibility issues (i. Aug 30, 2021 · ZX Spectrum KeyboardI made this keyboard for using with Superfo Harlequin 128, ZX Nuvo 128, ZX Max 128. PCB can be fit 48K or 48K+ case. You need to find a company to produce these, couple of choices I have used in the past are PCBWay and JLCPCB. RafaSeverino / ZX-Spectrum-PCB-Keyboard Public Notifications You must be signed in to change notification settings Fork 1 Star 3 Sinclair’s ZX Spectrum was an affordable computer that introduced colorful gaming and amateur programming for the masses. Built-in amplifier with volume and tone dials and SAVE/LOAD switch. DivMMC EnJOY! PRO ONE *with ‘pcb’ case*, incl. DivTIESUS (pronounced "div tee aesus") is a DivMMC compatible interface for the ZX Spectrum. Fits within the same 48 pin socket outline as the original ULA. I used a 15 pin D-type plug/socket connection and a curly multicored stretch of cable. This board, available on PCBway, is a redrawing of the original PCB's traces based on the service manual's documentation. why won’t my game run!) Memory contention and the floating bus explained List of Z80 instructions, opcodes, characters and timings Inside the Prototype ZX Spectrum’s ROM Spectrum + machines sold by Sinclair were assembled with later issues of the Spectrum PCB, although Sinclair sold a conversion kit to owners of the rubber keyboard model to upgrade to the newer keyboard, and these are compatible with older issues of the PCB as well. Schematic Links Original PCB : ZXS_I2_kartridz Retroleum diagnostic : Diagnostic ROM Image For The ZX Spectrum ROM Cartridges: ZX Interface 2 Resource Centre Published: 24 Aug 2024 . 1" (2. 2. He has ZX Spectrum CPLD-based clone for rubber case. It was just a PCB alone, therefore I had to solve keyboard. Here's the final version of the board (top of photo) connected to the back of a Spectranet card which is plugged into the ZX Spectrum. Jun 3, 2025 · Posted in classic hacks, PCB Hacks, Peripherals Hacks, Retrocomputing Tagged keyboard, keycap, pcb, sinclair, spacebar, ZX Spectrum ← The 1972 INTERCAL Compiler Revealed Jul 27, 2022 · PICOZX is a 128kB ZX Spectrum clone using a Raspberry Pi Pico. How does it work? The Raspberry Pi Pico runs Fruit-Bat’s ZX Spectrum emulator and Jean-Marc Harvengt’s Multi-Computer Machine About Miniswitch PCB keyboard for the ZX Spectrum+ and +128K This pcb keyboard fits perfect to the models ZX Spectrum plus (+) and ZX Spectrum 128k (toastrack) and replaces both the membrane and the back plate. The ZX ROM Cartridge Creator is a Windows based utility that allows the generation of Sinclair Spectrum ZX Interface 2 ROM cartridge files for use on 16K, 48K, 128K and +2 models. 54 Add to cart Introduction This PCB replaces the RF modulatorbox on a Sinclair ZX Spectrum computer. Distinguishing features: Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB. Find 23745 zx spectrum pcb 3D models for 3D printing, CNC and design. The Spectrum seemed to be all original, and featured a 1984 ISSUE 4S mainboard with 48 KB of factory-installed RAM – the ULA was socketed. Mar 15, 2021 · A ROM cartridge for the ZX Spectrum home computer with an Interface 2 or equivalent interface. For technical questions, please write to email mi Jun 16, 2024 · When word first got out that the Chinese board houses were experimenting with full color silkscreens, many in our community thought it would be a boon for PCB art. One variant of this issue solving is to use PS2 keyboard. The files are intended for use with the ZXC1, ZXC2, ZXC3 and ZXC4 ROM cartridge PCBs, and are suitable for direct programming into PROMs. B. The recreated printed circuit board (PCB) is central to this project's modern electronics. These ribbon cables need special push fit connectors to mount them onto a circuit board, but they are easy to find online. Features DVI over HDMI output USB Keyboard input PWM sound for ear, mic and AY-3-8912 12 quick save slots Load from . Jul 30, 2018 · In Leningrad they developed a clone of the ZX Spectrum, replacing the ULA by some TTL logic. Check out our complete lineup of retro-computing devices: PICOZX VGA - Desktop model with ZX Spectrum-style keyboard, colored motherboard PCB, also fits into original case PICOZX-VGA PICOZX LCD - Handheld portable with IPS LCD, ZX Spectrum-style keyboard, colored cover PCB with ZX layout, also with MCUME support, optional VGA PICOZX-LCD Dec 27, 2022 · He took a keyboard PCB meant for the ZX Max 128 project, populated it with some high-quality switches, and added a modified set of keycaps from the ManuFerHi N-Go. LENINGRAD this is a design for a self-built ZX Spectrum for hobbyists. Just plug it into your ZX Spectrum, insert SD card and power on The divMMC Future is a Pleasure to use Avoid the static electricity risk of bare ZX Spectrum emulator using Ras Pi pico with 5cm screen - virgesmith/pico-zxspectrum ZX Spectrum Replacement ROM This is a replacement ROM for the Sinclair ZX Spectrum 48k. What if I don’t own a soldering iron? It is possible to perform the modification without soldering, a video detailing the process is shown below. It is a perfect clone of the Issue 2B version, that also solves the problem of power and reset via HDMI and adds protec…. tap tape files, emulate loading sound and loading time -On screen menu Aug 3, 2006 · I have a ZX Spectrum issue 4A. Jul 8, 2022 · The ULA implement is base on "ULA chip for ZX Spectrum" project by Rodriguez Jodar, Miguel Angel (https://opencores. This is an external ROM card and expansion bus breakout board for the Sinclair ZX Spectrum. info/harlequin. There are extra keys that can be w The ZX Spectrum +3 was released on the 16th of May 1987. With the S3 we’ve got up to 14 touch pads and the ZX Spectrum keyboard uses 8 rows with 5 columns in each row for its keyboard. The board needs to be fitted with a 0. Connection to a ZX-Key ZX81 expansion interface is facilitated by 16 pin IDC header. N-Go - The N-Go is a full KS1 ZX Spectrum Next clone coming in a full size PCB with ESP and RTC complete with 2 Mega Drive style joystick ports, an expansion port and optional custom case and mechanical keyboard. The LED on the Pico PI indicates the mode: Sinclair ZX Spectrum with hard black keys Sinclair ZX Spectrum+ Sinclair ZX Spectrum+ Arabic Sinclair ZX Spectrum+ Español Sinclair ZX80 Sinclair ZX80 (USA) Sinclair ZX80 1-3K Byte Ram Pack Sinclair ZX80 16K Byte Ram Pack Sinclair ZX81 Sinclair ZX81 (French box) Sinclair ZX81 (German box) Sinclair ZX81 (USA) Sinclair ZX81 kit Sinclair ZX81 ZX Jul 18, 2025 · The ZX Spectrum is perhaps most fondly remembered as a home computer and a games machine. Why did you make it? The Spectrum's video output quality through it's RF modulator is quite bad The board requires you to be registered and logged in to view this forum. tap tape files On screen menu system (work Sep 9, 2024 · ZX Spectrum edge connector extension element to use in backplane Apr 15, 2023 · The interface allows you to connect an external ROM that can be used as ZX Spectrum diagnostic interface. This page details those facilities applicable to the ZXC4. The +3 has an integrated 3″ single sided floppy disc drive. Apr 7, 2023 · Video signal is ZX Spectrum 48K/128K timing (select by switch) AY-3-8910 sound chip Kempston Joystick port RS232 on board (option) Composite output, support both PAL and NTSC (There is a footprint to install 3. This mod will replace and take the space of the existing RF Modulator port socket without having to make any cuts to the computer’s case. xszkfu uoy dszrdg ouglki gntginlx bvrz hgd prtogpor huxxze hwa