With basic you will have modified and new zx81basic commands. I own a timex sinclair ntsc version of the zx81 and it displays no video. Schematics, component layouts and portconnector pinouts. Sinclair was able to make huge manufacturing savings by the inclusion of a custom ferranti ula or glue chip that connected the other components together in a way that made them do more than they otherwise would. The zx81 was the successor to the zx80 and one of the cheapest home computers. Sinclair zx spectrum 128 manuals and user guides, desktop. Includes 2 kbytes ram, and obviously 60hz ntsc tv modulator, otherwise same as zx81.
The manual has been written specifically for users of the zxpand expansion interface for the sinclair zx81 home computer. This is the ideal followup to the sinclair manual, with application to both zx81. The zx81s benefits were promoted with the aspirational slogan sinclair zx81 personal computer the heart of a system that grows with you. Timex sinclair ts timex sinclair is a result of joint venture between sinclair research ltd and timex corporation. The ts is prone to burnt, just leaving it on for a while without enough ventilation would fry the logic array chip. Books of the 20th century, but the zx spectrum basic programming manual has to be up there. Zx spectrum next the official portal for all things next. A unique advantage with the zx81 is that it only has 8 kb rom including 4 kb for floating point and four integrated circuits ic. Vintage timex sinclair computer 32k ram module manual 4 software cassettes. Are their replacements out there or are there substitutes.
You can now use it as a calculator, along the lines of chapter 2. In 1981, sinclair research released the zx81 microcomputer, or timex as it was known in the united states. There are also some zx81 book cover scans, and some hardware photos and manual scans, including the the dktronics 4k graphics rom, complete with a dump of the rom, circuit diagram and fitting instructions, and a description of the ts1500 composite video modification. Click here to navigate to the timex sinclair section, which contains the timex sinclair specific documents other peripheral manufacturers. However, you will need a standard sd card to be able to store files. Here are applications, documents, and emulators for the sinclair zx81 personal computer. Divide plus user manual page 7 of 140 compatible addons the divide plus is unable to work with any spectrum addons which have their own external memory, or use the same io ports such as. Sinclair zx81 issue one computer computing history. Zx spectrum basic programming manual pdf the zx81 and spectrum microcomputers. Html and pdf versions of this document are derived from the original word document any errors and omissions will be corrected in future versions. Although sinclairs instructions are complete, we feel. Vickers, steven zx81 basic programming perfectly normal site.
In the fall of 1986 i started to study maths, physics and computer science at lund university. The zx81 is a home computer produced by sinclair research and manufactured in scotland by timex corporation. Sinclair zx81 basic programming by steven vickers i. Eightyone is designed to run on windows xp, but should work on windows 98 and above. The indescomp centronics and rs232 interface manual. Afterwards i got many comments that for a kit it was too difficult to build due to the use of smt.
The zx81 computer is connected to the sound card via the zx expansion port on the back of. It was launched in the united kingdom in march 1981 as the successor to sinclairs zx80 and was designed to be a lowcost introduction to home computing for the general public. These instructions are largely a rehash of the zx81 instructions supplied by. The zx81 basic programming manual, also available in pdf format.
The power supply and the monitor were externally connected while in use. Sinclair zx81 bedienungsanleitung handbuch deutsch. Camera obscura 2017 english stream watch full online. Unfortunately, ive tried about 4 different ones and none of them work. Please respect this licence and feed back any changes into the. In 1981, sinclair research released the zx81 as a followup to their earlier zx80. Minesweeper is written by zxteammember bodo in pure basic. If youre a novice, then the main part of the manual has been written for you. This is the ideal followup to the sinclair manual, with application to both zx81 and 8k rom zx80. Chapter 1 setting up the zx81 unpack the zx81, you will have found 1. Service manuals for coco2 and multipak also blank rompacs. If you do not have a zx81 emulator installed on your computer, and your computer is not itself a zx81 or zx81 compatible, you can type any of these programs into the jtyone.
Sinclair zx81 manuals manuals and user guides for sinclair zx81. This technical manual was ocred for the sinclair world by. Original documents written by thirdparty manufacturers of sinclair peripherals. Desktop sinclair zx spectrum 128 service manual 39 pages. Download zx81 basic programming steven vickers download free online book chm pdf. A view of all the component parts that make up the zx81 replacing the zx81s ula. Sinclair zx81 issue one the zx81 was launched on march 5th 1981 by clive sinclair. Written in the informative and clear style of the earlier, highly successful zx80 pocket book, but with all new content. Some background information on the ula and links to some sites that have replaced it with discrete components.
Sinclair vintage computers and mainframes for sale ebay. Take the case top the part with the raised sinclair logo and zx81 printed on it and feed. Ts a zx81 clone, distributed in usa by a company called timex. View and download sinclair zx81 user manual online. Get the best deals on sinclair vintage computers and mainframes and find everything youll need to improve your home office setup at. Eightyone is an emulator for the range of home computers made by sinclair research and their clones in the 1980s. Timex sinclair sold the zx81 in the united states as the ts. Different to sinclairbasic the new basic has a flashing k, l, f and gcursor. I used to buy these from fleas markets and got two nonworking, i had to order one from ebay marked as fully functional, but if i leave it enough time the screen starts showing trash and i better turn off it before it burns also. This book is the users manual for the zx80 personal computer.
No standard supports either this adaptation nor the original sinclair basic dialect as, by the time the zx81 computer was developed and sold 1980s, each manufacturer had. Zx80 operating manual first issue developed during june 2003. Timexsinclair sold the zx81 in the united states as the ts. The zx81 is a home computer that was produced by sinclair research and manufactured in. If you do not have a zx81 emulator installed on your computer, and your computer is not itself a zx81 or zx81 compatible, you can type any of these programs into the jtyone online zx81 emulator and see what they do. Download software for zx81 and emulator here i will present some nice software for your zx81 which is written by zxteam members and cannot be found in other sites. Finished pdf to html transcription on 8th october 2009. A television could be hooked up to the sinclair zx80 for visuals, but the signal was transmitted over a rf connection. It has no switches to turn it on you just connect it to the power supply. Database contains 1 sinclair zx spectrum 128 manuals available for free online viewing or downloading in pdf. The manual was 128 pages long and a catalog of 27 program cassettes were available as well.
I bought a zx81, modified for composite display, off ebay recently. A pdf version of the manual, zx81 basic programming by steve vickers, is available here. It came with no power adapter, but i presumed that a universal one would be fine. Mastering machine code on your zx81 or zx80 by toni baker. Mrx sound board for the zx81 from sinclair manual for. Desktop sinclair zx spectrum service manual 59 pages. Minesweeper for your zx81 will also run under zx81emulator xtender.
The ula chip, described by the zx81 manual as the dogsbody of the system, has a. This technical manual was ocred for the sinclair world by andy dansby. The original sinclair zx80 ram pack held either 1, 2 or 3 kb of static ram and a later model held 16 kb of dynamic ram dram. Amstrad pc1512 the zx81 is also a pc, see the bottom of a zx81. Sinclair zx81 basic programming by steven vickers second edition 1981 copyright 1980 sinclair research limited reproduced with permission from the publisher. Click here to navigate to the timexsinclair section, which contains the timexsinclair specific documents other peripheral manufacturers. Zx81 service manual and assembly instructions world of spectrum. Zxpand manual page 5 of 16 what do i need the zxpand comes ready to plug into your sinclair zx81 home computer, switch on and go. This report describes an adaptation of the basic dialect used by the sinclair zx81 computer. It was very similar to zx81, it only contained more ram 2k and had ntsc tv modulator with switch allowing to switch between channel 2 and 3.
Archive of the eightyone sinclair emulator written by michael d wynne. The zx81 was based around the 8bit z80 microprocessor running at 3. User manuals, guides and specifications for your sinclair zx spectrum 128 desktop. Apple ii, trs80, sinclair zx81, sinclair zx80, timexsinclair. The 8k zx81 rom bundled with a zx81style keyboard overlay but still lacking the nmigenerator. At last this free to download title will be available to download from the rusty. Eightyone source code is released under the gnu gpl. One year later, they released the new and improved zx81. This ula was responsible for the zx81s low chip count. Original documents written by sinclair research ltd. The entire book is available in both pdf and formatted ascii format. Along with the actual sinclair zx81 manual, the sell of this machine included a book of game programs. If you wish to insert the interface into a case, then it is designed to fit within a memotech memory. As well as emulating the machines themselves, various addon interfaces are supported, including hires graphics, custom character sets, sound and colour cards.
The manual has been written specifically for users of the zxpand expansion interface for the sinclair. Sinclair zx81 basic programming by steven vickers second. Overview zx81s which have been modified in some way and so we cannot guarantee that the zxpand will work in all circumstances. It came with a thin keyboard overlay and a zx81 manual.
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