Zx spectrum fans continued on this development which resulted in the. Zxbadaloc clone also from alessandro poppi, this is not an interface for a standard spectrum but a complete clone designed to fit into the rubberkey case. Ula designed from discrete 74xx ics, screen part or ram was synchronized perfectly, without cpu blocking. Building zx spectrum clone harlequin part 1 malinov. A zx spectrum rom some original ones might be available in the webshop, otherwise you can use the licence free spectrumse rom a zx spectrum case with keyboard e.
And while towards the end of 1980s its popularity declined. Got a pcb from the developer and a load of parts from digikey for another version of countless zx spectrum clones. This is a self build computer kit that i have wanted for a long time. In the schematic, the ras and cas lines are drawn incorrectly for ics 15 to 22. Superfo harlequin 128k kit computer retrocomputers. The zx spectrum ula has been reverse engineered into full. This computer is a clone of the zx spectrum 128 computer a computer that isnt currently in my collection. Scrplus converts images to formats suitable for use with the zx spectrum, using innovative and highly effective. The person who sold it to me had inherited it and had no idea how it worked. You can now assemble a complete and 100% compatible zx spectrum 128k clone yourself. Soviet leningrad design for selfbuilt zx spectrum clone little bat. While it was software compatible with zx spectrum 48k and has two interface 2 joystick.
Sound has an amazing clarity too bringing this close to being the. Zx spectrum design in a digilent spartan 3 starter board. Ive been tempted a few of times to buy one of the assorted bare pcb harlequin boards on ebay, but was never sure if they would work. Cas connects to pin 6 on ic23 and ras to pin 4, not the reverse as. Tynemouth software llp old computers, new computers, bespoke web design and software development, computer repairs, it and media services uk saturday, 3. Buy the sinclair ql games collection 1 for the pc from rwap software. Tynemouth software llp old computers, new computers, bespoke web design and software development, computer repairs, it and media services uk saturday, 3 february 2018 keyboard options for the zx max 48 zx spectrum clone. Here youll find schematic and layout information for various models of the zx spectrum. Robertson, phillips, and the history of the screwdriver duration. The zx spectrum reverse engineering and clone desgin blog the sinclair zx spectrum ula book a site dedicated to the reverse engineering of. Hands on with the just speccy 128 by zaxon retro games. Building a harlequin zx spectrum clone tynemouth software.
A czechoslovakian clone of zx spectrum, developed by frantisek kubis at 1984, student of ef svst electrotechnical faculty of slovak technical university bratislava. Zx spectrum was a very popular well, at least in great britain and spain home computer released in 1982 by sinclair research ltd. Neither in the dandy new reality program, nor in from the screw, nor in any. The schematic of the keyboard has been thoroughly researched so that im sure it will be compatible with both my clone, and with a real zx81. Building zx spectrum clone harlequin part 1 malinov family. This is a kit which can be used to build a zx80 clone. Which ports are which on this soviet zx spectrum clone. A pcb has been developed by don superfo, which uses discrete logic to. There seem to be some differences in the order of keyboard. The following is a list of clones of sinclair researchs zx spectrum home computer. Minstrel zx80 clone the minstrel is a fully compatible zx80 clone with 16k ram that can run the original 4k rom basic, or the later zx81 style 8k rom basic.
Desktop sinclair zx spectrum manual 83 pages desktop sinclair zx81 user manual 16 pages desktop sinclair zx81 user manual 92 pages desktop sinclair. Leningrad this is a design for a selfbuilt zx spectrum for hobbyists. Starting a zx spectrum clone project page 1 eevblog. Building a harlequin zx spectrum clone ive been working on a lot of zx spectrum and zx spectrum related items recently, and have now built a zx. Image quality on my 42 inch led tv using the custom rgb cable is simply amazing, pin sharp and as colourful as uncle clive intended.
Zxtunes it is worlds biggest zx spectrum 8bit music collection. Zx spectrum clone built around an earler version of the ula design. The schematics have been redrawn using the gschem schematic editor from the open source geda project. Zx spectrum clone with considerably different hardware spec. It seems to be a homemade clone, rather than a factorybuilt one. Sign up schematic of a 8bit computer, clone of sinclair zx spectrum. The superfo harlequin 128k revision 2d kit a clone of the sinclar zx spectrum 128k. For 8 years i played in the spectrum in black and white and everyone knows why. Keyboard options for the zx max 48 zx spectrum clone. The official home location of the tzx format the current version is v1. It is one of the first selfmade clones of zx spectrum in the soviet union. Zx spectrum fans continued on this development which resulted in the design that is now known as the harlequin superfo, with 128k versions like the harlequin rev 2d.
Heres a brief overview of the various spectrum pcb revisions, this section is split into three main areas. Tynemouth software llp old computers, new computers, bespoke web design and software development, computer repairs, it and media services uk. Zx spectrum 128k replica with real z80 cpu and almost all logic in cpld altera epm7128stc100. A couple of years ago, chris smith reverse engineered the zx spectrum ula you can obtain the zx spectrum ula book to read about that. A nicely built pcb with 45 chips most 74family inside.
Input is via an 8x5 matrix keyboard see below for options, output via composite video improved over the original zx80 design. How to design a microcomputer has been completed and the book is with the. Amstrad cpc, c64 and zx spectrum to the latest free indie pc releases weve got it all. Also includes builtin kempston and sinclair joystick interfaces ports, tv and rgb monitor output, printer interface. The zx spectrum version the zx spectrum version of tuttut has been a huge success all off its own. Minstrel 2 zx80 clone from tynemouth software on tindie. In this project we will build a sinclair zx80 clone with 16kbyte of ram and a 16kbyte eprom with dual zx80 and zx81 rom images which can be switched by selector links. The zx spectrum reverse engineering and clone desgin blog harlequin. An 8 bit z80 based computer, the predecessor of the zx81 and zx spectrum. The mini psu is a traco unit, the same as is commonly used in. Also because his compact sized and his low cost price voltage level shifters would raise the price. News f5 to update 20161018 added video retrocod 2016 talk. This shows the working screen of the first program from the horizons demo tape spanish version, the one that teaches the hardware of the spectrum. The spectrum is connected to the left hand side of the backplane board.
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