The History of World Computing Systems. The First Models How it all Began. We Love Computer, JMJG start in 1987 with MSX!

Summary of the History of World Computing. From the abacus to modern Digital computing. (only the most important points)

This article also serves as a basis for studying and following our Hardware class, taught at the ESIJMJG computer school.  We post here only the main points of the history of global computing, focusing on personal and corporate computers, without addressing portable devices and peripherals. For much more detailed and complete information, wait for our documentary video, which will be produced in the near future.

Man's need to calculate

Since the earliest peoples (Babylonians, Egyptians and Greeks and Chinese) existed, man has always had the need to calculate. Numbers and mathematics were the most practiced sciences and would completely change the domain of science, magnitudes and the world.

The fingers and toes were used as a method of calculation (addition, subtraction, multiplication and division), however, to calculate enormous magnitudes, it was not the fastest method and suitable. 

The abacus was the first, most advanced calculating tool that was invented in ancient times (approximately 2400 BC). To the surprise of many, the abacus is still used today as a calculating machine, and is considered even faster than a person manually operating modern digital machines!

The term "computer" was attributed to people who handled calculating tools in general.

With the discovery of complex mathematical formulas, the need to master astronomy, ancient people built mechanized calculating machines. Thus it was possible to determine the position of celestial bodies, predict natural phenomena such as tides, weather, etc.

In mid-1642, when many other inventors tried to produce their mechanized calculators, Baise Pascal invented the "Pascalina", which is attributed as the first mechanized calculator in the world to be produced on a small scale.

This "brilliant" calculator was entirely mechanized, containing wheels and gears, capable of performing fundamental operations (except division) without the help of the abacus! It had the famous "go one"!

In 1820, Thomas Charles de Colmar would launch the First Mechanized Calculator to be mass-produced in the world! Nicknamed the "Arithmometer" this machine could perform the 4 fundamental operations and with the "go one"!

Colmar Arithmometer. Mechanical calculator manufactured in large scale.

In 1833, Charles Babbage (mechanical engineer) introduced the concept of the "programmable computer" a universal machine that could be "programmed" to perform sequential calculations. The concept of his analytical engine, was the basis for computers! Years later, his engine was built, it was programmed by punched cards, and the result was calculated by turning a lever. Babbage can be considered the "father of computing".

This machine was an analog computer, containing: arithmetic logic unit (ALU), memory, logic and loops. A Turing complete machine!

In 1880, Herman Hollerith improved the punched card programming technique, which had already been used in looms (making fabrics) since 1800!  His company would later become nothing more and nothing less than the giant IBM!

Hollerith built a machine operated by a programmed card, which could make an "election prediction" for the US president in 1890.

In the mid-1920s (early 20th century) many mechanical calculating machines were produced. With incredible improvements, they could now even be used in offices!

Analog computers were used for tide calculations, and even ballistic calculations for the army and navy in World War I!

Electronics and Digital evolution!

It was only at the end of the 19th century that Electronics (engineering and technique) was officially created. Specialty created due to the evolution of the Radio, Telegraph and Telephony industry. With this, many inventions and research with semiconductors were being carried out.  Until then, many common components (resistors, valve-shaped diodes, amplifier valves, wires, etc.) already existed.

    

All amplifier circuits were based on valves. Thomas Edison, Nikola Tesla, among others, began the study of lamps that would later give rise to thermionic valves.

  These components would give rise to diodes (Fleming valve), triodes, and other fundamental components in the construction of hundreds of other products.

 Radio equipment, televisions, amplifiers, in the 19th century,  were made using this component. Its only problem was its extremely short lifespan, high heating, and enormous consumption of electrical energy.

1948 - Studies with semiconductor materials technology allowed the invention of the Transistor, which would revolutionize the world of digital computing! Research with semiconductors carried out in the BELL laboratories allowed the discovery of the electronic transistor. Replacing valves in all their applications, allowing for more compact, faster circuits, lower heating, less energy consumption and a longer useful life. The basis of modern processors would be millions and even billions of transistors!

Integrated Circuits-Solid State Electronics

1960- The invention of the Integrated Circuit would allow the construction of CHIPS or microchips, integrating many circuits in just one component. The Future of Microprocessors is starting here! The famous Solid State Electronics begins, abolishing valves (gas).

Without Electronics, Modern Digital Computers would not exist!


In 1854 George Boole would publish the concept of "boolean logic" which would serve as the basis for the creation of digital logic circuits (logic gates) common base of any digital machine!

Early Modern Computers

1936- Alan Turing, developed the theory of the "Universal Turing Machine", a basic concept studied in the theory of computation. This theory states that any machine can be capable of calculating or computing data, which are written by programs (algorithms) on tapes or punched cards.

    1939- Konrad Suze based on all the knowledge acquired by humanity, built the world's first fully automatic electromechanical DIGITAL computer! There were versions called Z1, Z2 and Z3 which were the most the most modern version. Z3 had 2000 relays (electromechanical switches) and an operating frequency of 5/10Hz (hertz)

The Literal Technological War (World War II)

The Second World War was undoubtedly the technological war! Computers were used as true calculating machines, where every second was a huge advantage, winning or losing was a matter of calculations!

Allies X Axis used truly useful computing machines. Brilliant minds built machines never dreamed of by humanity. Too bad they were used for evil!

German messages were "encrypted" using a machine called ENIGMA. It completely scrambled the message, using a password of the day. This way, enemy troops would not intercept the messages, ensuring total secrecy. There was a very sophisticated algorithm in this mechanical machine, and in this case the Allies (Brazil) had to try to decipher it in the shortest possible time.

    In 1939, the English government, followed later by the American government, built the bombe, the most complex computing machine ever created, to decipher the ENIGMA messages. Thanks to the bombe, the allies were able to win the war!

    After that, world governments realized the importance of computers and worked to equip their military bases with the best computing technology available. This would leverage the use of computers for humanity!

Colossus and its operators. Deciphering messages Enemies

    

    1944- Colossus was the first 100% programmable digital computing machine. This computer built by Tommy Flowers, Max Newman, Alan Turing, was used in World War II to break the encryptions of the new German Lorenz SZ machines.
Colossus processed more than 5 thousand words/second, was fed with punched tape (running at 12 meters per second). It was "programmed" with cables and electrical connections, similar to the old telephone exchanges. It was huge, almost occupying an entire building, 

    1946- ENIAC built in the USA, for army ballistic calculations (artillery tables and even the hydrogen bomb), it was a computer similar to the Colossus, but much more improved. Almost 18 thousand valves equipped the computer, which consumed 150Kw (almost a small city). Its average clock was 100Khz, it weighed more than 30 tons and occupied an entire building!

1948 Baby Testing Early Memories RAM.

    1948 - Manchester Small Scale Experimental Machine (BABY). It was the world's first digital stored-program computer. It was built to test "Williams tubes"  the world's first RAM memories! BABY had all the components of a modern digital computer.

    1949 - Mark1/Ferranti MarkI

- Built based on the BABY, these computers were aimed at the corporate public. The world's first general-purpose digital computers to be sold commercially, and not just for military use.

Here appear for the first time in human history, the first digital music played by a computer (horn) as well as the first games (chess)

    1949- EDSAC/EDVAC - EDSAC was a British computer that calculated the table of prime numbers, which would later inspire the LEO1, while EDVAC was a North American project to improve the ENIAC in memory and speed.

    1951- LEO1 - It was the first digital computer in the world to be used in a company office. The curious thing is that it was built by a British tea trading company! Lyons&Company, LEO was built for administrative and financial calculations in order to improve the performance of this company. 

    

    1951 - UNIVAC (Universal Automatic Computer). Designed by the same people who made the ENIAC possible, but now with a commercial focus. 46 UNIVAC units were sold at an updated cost of US$9.1 million, considered the first mass-produced computer. Using 5,200 valves, consuming 125Kw, and here begins to appear the storage units in magnetic tapes (rolls). UNIVAC could also read and write on punched cards. As a marketing ploy, UNIVAC was used to predict the US elections in 1952 and correctly predicted the winner! Weighing 13 tons, clocked at 2.25 MHz, occupying more than 35m2. It was fully programmable and had memory. There are records of advertisements from the time, about UNIVAC on North American television.

Origin of the Term "BUG"

    It is known that many nocturnal insects are guided by light, imagine a building full of well-lit valves, it is a full plate for many insects. Imagine if one of them falls into the circuits of huge computers, what would happen? A general failure! That's what happened in 1945, an insect got stuck in a part of the circuits of a huge computer, the Mark II. A similar event also happened in the ENIAC, where hundreds of insects were swept away every hour.

However, the term "BUG" may be older, from 1878, when Thomas Edison first had an insect trapped in the circuits of his phonograph!

To this day, we use the term BUG when referring to software problems and doing  debug (another original term).

Second Generation. Transistorized Digital Computers

It was only in mid-1955 that the transistor effectively began to be used as a replacement for valves, giving rise to a new generation of computers, faster, smaller, more reliable, generating less heat and much more economical!

    1955- Harwell CADET. Attributed as the world's first 100% transistorized computer, built in the USA, it had 64kb of magnetic cylindrical memory, 58Khz clock (lower, as it did not use valves to generate, the transistors of the time still did not allow fast switching). It was not commercial.

    1956- Metrovick 950- World's First Commercial Transistorized Computer. Six of them were produced by the company Metropolitan-Vickers.

    

    1960-1964: IBM 1401 manufactured by the giant company IBM, which produced more than 10 thousand units! 

   This Computer has a maximum magnetic memory of 16 Kb and was made in PCB tecnology and course a punched card reader!

Third Generation- Modern Computers

    With the evolution of electronics, dominance of semiconductors and solid state, many components considered "impossible" until then were created.

    With this, CPU Processors, magnetic disks, cassette readers, RAM memory chips, were able to begin taking their first big steps.

    1964- IBM System 360. It already had magnetic tape reader units, CPU unit, the famous typewriter which was the primitive keyboard, punched card output.

    A modular computer, each piece performed a specific function. The concept of architecture began to be defined at this time.

    1971- Kenbak-1. The first Personal Computer to be sold in Kits (assemble it yourself). Only 40 units were sold, but the attempt to make the personal computer had begun! 

    However, the programming was all via keys and the output was via lamps.

    1973- TV Typewriter: this device that looked like a "typewriter" was actually the first graphical interface for a text-based monitor. Until then, all computers used lamps to signal the output of data. This would be the first  video card project with a keyboard.

   👉 1974- Xerox Alto: First corporate computer, which introduced the concept of mouse and graphical operating system operated by icons and buttons. It would give rise to the Apple LISA, and the future Windows.

    In Xerox Alto, we have the First Graphical User Interface (GUI) creation! The starts to Modern Operational Systems like Apple Lisa and Windows. Here Gates take the ideia of Jobs in Lisa Graphical System, to create the Windows in future. But, the Graphical Operational is a invention of XEROX not Apple or Microsoft!

    

1975- Altair 8800 : Computer sold in a build-it-yourself kit, based on Intel's 8080 processors. Another one sold under the term "Personal Computer" had already been manufactured by Mr. Gates' company. Many computer geniuses began their careers on this computer. 

1976- Apple 1 - First computer from the 🍎Apple giant, selling 200 units to enthusiasts, in the style of a personal computer kit. A worldwide rarity, a valuable collector's item!

 Important Notice: The Apple 1 dont' have a cabinet! Only the Board is design! In the picture above, a costumer made a wood case to put the boards inside them! The original Apple 1 don't have this apperance!

    1980 ZX Spectrum- The most influential personal computer in Europe and Brazil (TK90/95). 

    Produced with Z80-Zilog processor (another one of many models to use this processor). This Computer must be connect direct into TV using RF Signals! Have a Color graphical.

 👉1981- IBM PC - A milestone in our modern computer architecture. The term PC (personal computer) is still used today. It already had a keyboard, a common disk drive for 5 1/4 floppy disks and even an option for a 10Mb Winchester ( Nowaday know by Hard Disk)!

     Despite the Old Design the IBM-PC has the base to other personal computers, like XT plataform and AT 286, computers that many people have using during years!

    In the First Time in Personal Computers the Winchester (Hard Disk) can be a option to save digital data! 

    Also a 3 1/2 Floppy Disk Drive is optional!

    Has a 16 Bits 8088 Intel Processor running D.O.S systems!

    👉💫1983- Apple LISA- The World's First Personal Computer, featuring a graphical interface, operated by mouse, with a complete Office suite! It had no internal hard drive.

 Important Notice: During the Apple LISA project, Bill Gates and Steve Jobs work together. Bill will invited by Jobs to help in software and Graphical Interface. Gates in this time already have the Microsoft, and your operational system basead in D.O.S text! But Gates break the law, and take confidencial informations to Create your Graphical System in DOS Mode.  Today we Know about Windows!

    Windows was a Graphical Interface for MS-DOS! Windows in the fact was created by the LISA Apple Project, when Gates help Jobs here!

    Lisa was Steve Jobs' daughter, so this computer is named after her.

👉💫1983- MSX- Universal computer standard very famous in Europe, Japan and Brazil. Here in Brazil, the companies Gradiente and Sharp dominated the market with the Hotbit and Expert. Equipped with the famous Z80-Zilog processors. They had interfaces for everything, were colorful, with the option of expanding memory, disk drives and cassette recorders. They did not have hard drives.

    It was on the MSX platform that JMJG began his career in computing! The MSX system had no operating system, only a command interpreter called BASIC, created in partnership with Microsoft!

    The MSX required a special monochrome monitor, but it could also be connected to a television via the RF signal. It had 16 colors! Input and output for a standard cassette recorder, dot matrix printer, and two slots for game cartridges or programs!

    The MSX was a very special platform in the world of computing for JMJG and many enthusiasts. To this day, its legacy lives on, with developers still active! MSX is a 16 Bit processor.

👉💫1984- Macintosh 1 - Project based on LISA, which consolidated Apple as a world leader in computer technology. 

    It had a mouse, graphical operating system, and a complete office suite, in addition to many famous programs. It did not have an internal hard drive. The Macintosh 1 has 128Kb of RAM Memory, and many Softwares do Edit Picture, Sound and other. A mark in Apple! 

💫1984- XT/AT (80286) - Computer standard used to this day in modern platforms.  The start of Modern Computers. XT/AT has the same visual like IBM-PC computers.

    The XT plataform, was created by IBM. XT is a betther version of IBM-PC, XT comes with CGA Monitors (monocolor),a QWERTY Keyboard, and DOS Operational System, 8088 Intel Processor, Serial COM Port, Parallel Port. Winchester was optional. 5 1/4 Floppy Drive or 3 1/2 Floppy Drive. 

    The 80286 Intel/ 80286 AMD processors stand out, it is the beginning of the modern era of AT current computers. 

    AT Plataform replace the XT Standard! Comes with VGA Color Monitor, Internal hard disk (Winchester), Floppy Drives,Standard connectors like VGA, LPT1, Serial COM port, qwerty keyboard standard.

    Here start the 32 Bits era of Computers!

For now, we'll leave it at that. I know there's a lot left to talk about. We still need to talk about laptops, inputs/outputs, peripherals, but we'll bring this content in a documentary video in the future.

This is my tribute to the equipments that is a big part of my professional life.

See you next time

Written by: JMJG 

Read More

Original Sealed Windows 95 OSR 2.5 Version for Collectors CD+Manual.Just One Rare Piece (Only Sale in Brazil)

    Hello fellow collectors and lovers of vintage computing! Today we bring you an incredible, unique and extremely rare opportunity! A 100% Original Sealed Windows 95 CD with Key in Genuine Paper Money + Original CD + Manual! 

    But this is not just any Windows 95, this is the OSR2.5 version that has USB Support, FAT 32 Support and UDMA!

    Wow, a Windows 95 like no other and all of this 100% Sealed! It has never been opened, notice the red factory seal still intact!

    Obviously the original plastic has already degraded but it is still 50% wrapped to prove that the CD and the Kit have never been removed from their packaging. We put an extra layer of plastic on top just to preserve the originality until the owner decides whether to open the Kit or keep it closed! A rare and excellent opportunity for Software collectors in Brazil! If you want it, must comes to Brazil to can Buy, we dont send this item from abroad!

    For Everybody can check this Rare product, see this Video below that Show every detail of this Rare Microsoft Kit! A Real and Original Windows 95 OSR 2.5 Version!

    Anyone who buys directly from our Official Store will never have another version like this one for sale, still 100% Sealed! So take advantage! Don't waste time or wait until tomorrow, because the item may have already been sold and then we won't have another one like it, we can guarantee that there will never be another one like it again!

    The launch of our official store marks an important milestone in the world of Brazilian computer collectors! It's not every day that we have a Windows 95 OSR 2.5 in Portuguese and 100% Sealed!

    It also came with Internet Explorer version 4.0, much better than the 1.0 released in the 1995 version. After Windows 3.11, Windows 95 had the exclusive ability to run in Protected mode, accessing instructions of up to 32 bits and up to 4 GB of RAM.

    When it separated from MS-DOS, Windows 95 was an independent operating system, although it could still run applications that required MS-DOS directly at any time, since it had ways to run MS-DOS directly through the start menu.

    Unlike Windows 3.X, Windows 95 brought improvements in driver management and Plug&Play for old ISA cards, including Sound and Network. It also brought improvements for 3D accelerator video cards, presenting the first games improved with DirectX.

    At that time, Pentium 1/AMD K6 processors came from the factory optimized to run Windows 95, with performance improvements compared to the old X86 processors. Here, collectors will not only buy an original Windows 95 CD, but a piece of computer history!

    ESIJMJG is a pieace of History of Computers in the World, you can check the reason for it! Beyond old machines, we also have old original Softwares like no other!

Read More

Contact Us in Brazil Using this Form! (Only for Doubts, not Sales or Services)

Contact us in Brazil (Only for Doubts) For Sales and Services We don't Do International Services at least you are here in Brazil!

Read More

Linux For Everybody Games Office Suite and Much More! Free Video Trainning by JMJG more than 12 Years using Linux in Our work!

LINUX FOR EVERYBODY. FREE VIDEO TRAINING AND TIPS! More Than 12 Years Using Linux in Your Company!

    Your Home,Small business, office, practice, business, store, whatever it may be, can now USE and INSTALL the best operating system in the WORLD! And the best part is that the operating system is FREE and comes with all the basic packages, including LIBREOFFICE, already pre-installed and much more!

    The GNU/LINUX Operating System is an operating system already used by giant multinationals all over the world. Due to its open source code and the possibility of customization by IT professionals, this magnificent system is preferred and widely used in: Servers, Mainframes, Train Movement Control (TMC), Air Traffic Control, Stock Exchange, space stations, military sector, smartphones, tablets, electronic security, Supercomputers, and dozens of other applications.

    

Many of the most advanced technology applications are powered by the LINUX operating system. IT professionals use LINUX in Data Servers, Networks and database control in large companies. There are hundreds of GNU/LINUX distributions available, many dedicated exclusively to companies and industries. Best of all, LINUX has a significantly reduced cost for such applications, something that could not be achieved with proprietary codes. High stability, security and reliability make LINUX the preferred system for high-performance applications.

The use of GNU/LINUX as a Desktop is completely FREE! And complete with the entire office suite! No limits on how many machines you want and desire. Compatible with many architectures and processors, from old machines to the most modern! We using Linux in our AT 486/Pentium and many Vintage Machines and Computers. Works Fine!

You will be free from VIRUSES, hacker attacks and, worst of all, PIRACY! The problem is not the fine you pay for using illegal software, but the problems hidden behind pirated software, malicious codes that are tracking and spying on you over the internet!

BE LEGAL, use free software. Learn more about how to implement LINUX in your small business and earn money, the cost is much lower than an original copy of the proprietary OS! And the best part is, FREE updates, without ANTI-VIRUS programs.

If still wants to continue using the proprietary OS, but wants an option that is up to par for Office, we present LIBREOFFICE, which is completely FREE! In this case, we will only provide training on LIBREOFFICE, training your employees to use this magnificent software:

Linux code was created by Linus Torvalds in 1994, basead in UNIX Code, and today is the Operational System that ESIJMJG uses and yours machines!

Join Us in this Free World! You can Do It and is Free! Thats is, Linux is Total Free!

OpenSource Software For Everybody! Office, Video Editing, Audio Editing,3D Animation,Gam
es And Much More!

OpenSource is a real World! Despite Linux is a Great Operational System, without other Softwares you cannot Do nothing! You Must have other Softwares in order to Write a Text, Web Browse, Listen Music, Edit a Video, Edit a Music, Create Image, Edit Image, and do many other activities!

Then the Linux comes with a Free Software Package Manager, a Free Store, that you can Download and Install a hundread of Free Softwares!

Yes! This Free Software is called Opensource World!

Here let's give a some exemples of Opensource Softwares that you can use in Linux to do many greats activies!

FireFox/ Opera/ Google Chrome - Web Browsers to navigate on Internet, you know and must use one them in Windows ou Mac already!

LibreOffice - A Great alternative Office Pack total Free! Comes in many Linux Distros already installed! You Can Open,Save, Edit, generates PDF files and much more! Also works with DOCx,PPTx, and modern Office Files also! A best Free Office Suite and Complete Free solution!

Audacity: A Great Free Sound Editor, you can Record, Edit, Play Many Sound Files, like Wav,MP3,Flac and much more. You can use many Filters, and many Effects in Audio! Is a professional Free Sound Editor!

Blender: A Great Free and Professional 3D Editor, you can creative animations in Blender, Games 3D in Blender and until Simulation! Blender is a unique Free 3D professional animator used in many  Movies in theaters and more! 

Kdenlive: A Great Free Video Professional Editing. You can Edit Video in many formats, including HDTV, Full HD,4K and export to many formats MP4,MKV,etc. You can easy uses many effects and filters! Kdenlive is a powerfull Free Video Editing!

GIMP: A Free Professional Image Editing with many Filters and Effects! You can Save and Export and many image Formats!

InkScape: A Free Professional Vector Draw, similar a Corel Draw!

LibreCad: A Free Professional CAD 

Kicad: A complete and professional Suite for Eletronics 3D Design! Here you can Create your PCB, eletronics diagrams and much more!

Free Games are available in Linux too! But if you desire, can Install Steam client, and login! You can Play modern Games With Linux in the same way that you do in Windows or MacOs!

It's a Some Exemples! With our free Video trainning you learn all in Linux and OpenSource Softwares! 

With Linux you can Do All You Want! And Free and much more secure! 

Read More

Old Computers Restauration and Sale XT AT 286 386 486 Pentium Line and Others in Brazil!

Old Computers Like IBM XT, AT Computers and Pentium Line. Repair and Sales in Brazil! 

    When it comes to old computers or vintage computing, few companies in Brazil still have the technical know-how (Know-How) that ESIJMJG does. We started with computing in the 1980s with the famous MSX line of computers, which in Brazil had two representatives: Gradiente Expert or Sharp Hotbit! At that time, there were many console-style computers, such as TRS or TK and many others. 

Everything was powered by an 8-bit processor, standard Z80 or similar! At that time, computers still recorded digital files on K7 tapes in recorders, few models had a floppy disk drive and the Winchester (current hard disk) practically did not exist yet, although only the XT line of computers already had rare models with it built in. The MSX had an interface cartridge that allowed connection to a 5 1/4 or 3 1/2-inch floppy disk, but it was very expensive and rare, so it was possible to load improved DOS systems than the BASIC resident in ROM. MSX1s with IDE interfaces are already on the market today, and I (JMJG) have never seen them, although there are some adaptations today.

At that time, in Brazil, in the mid-1980s, the XT line of computers became popular, with giant cases and built-in 5 1/4 360kb floppy disk drives, and some even with the rare ISA card for connecting to hard drives (HDDs) of up to 512 Mb (maximum). This was the first time that computers with a DOS operating system installed on a hard disk were launched. Several clones of the XT quickly began to invade the national industry, such as the famous Prológica CPUs and several others. All of them were now based on the revolutionary architecture of the 8080/8088 Intel/AMD processors, which were already 16-bit, better than the Z80. The MSX line was already becoming obsolete, since the XT could run the first versions of Win 3.X and improved graphics systems.

In the early 90s, the XT line was replaced by the more modern AT line of computers based on AMD/Intel X286 processors. Now, computers already had 3 1/2 and 5 1/4 floppy disk drives as standard, and the Winchester became known as a Hard Disk (HD), and was more common in computers with DOS systems and the first, more modern Windows 9X. Rapid evolution came in the AT 386 and then in the 486 lines, where we already had computers with a Multimedia Kit and even a CD-ROM!

After that, the Pentium/K6 line arrived, and the subsequent generations of succession arrived to the present day in just a few years.

ESIJMJG has followed all this evolution from 1986 to the present day!

So, why is ESIJMJG so specialized in repairing/restoring vintage computers, XT/AT/Pentium/K6 line?

Quite justifiably, ESIJMJG is a company whose technical staff (JMJG) has been following the evolution of computing since 1986 and, as mentioned, has knowledge about maintenance/assembly of the entire line, from the XT micros, then the AT line micros (286/486/486) and finally the Pentium/K6 line and many others!

It is one of the only companies that has maintained the Know-How with over 25 years of experience, knowing exactly how to configure/assemble all these machines. It is the only one that can still obtain replacement parts, as well as configure/restore/assemble computers from these lines for museums and collectors!

ESIJMJG works with suppliers of old parts that are very rare in the Brazilian market, where almost no one can get parts anymore, but we will still try to find them. They are standard AT power supplies for XT/AT computers, IDE hard drives and special adapters to modernize the equipment for CF cards! And it's not enough to have the parts without knowing what to do with them correctly. Many old computers require special configurations that are not known to the current technical public (it's the trick and know-how that also sets us apart).

Currently, the public that still needs to use old computers (AT/Pentium line) are a few companies that need special boards in ISA slots and that still run programs in a DOS environment!

However, we also serve collectors, museums and any user who wants to have their old computer equipment fully functional today!

What new developments will ESIJMJG bring to the vintage XT/AT/Pentium 1 and 2 computer market in the future?

    ESIJMJG will bring many new developments to the Brazil vintage computer market! We are plugged into the latest technologies dedicated to the amateur/vintage market and, as specialists in the subject, we comment on some that are exclusive and never before seen in Brazil!

    ESIJMJG will produce in the national market one of the few and rare boards for XT computers with IDE/CF Card technology, which means that on an old XT standard computer, you can run a common IDE standard hard drive or even a CF Card memory card, transforming the XT computer into a true micro with an "SSD" disk! This is rare and unprecedented and we will have it! 

    
    We bought a batch of almost new XT and AT boards, which we will reassemble and restore new machines in the XT/AT standard with repainting, "SSD" disks with DOS operating system installed and many games, ready for use by collectors or computer museums! A practically new and restored piece of equipment from the last century being sold today! These are limited and rare editions, dedicated only to specialized and demanding collectors! We will change the market in this sense by re-releasing unique limited editions of certain configurations, these are XT, AT 486, Pentium 1 computers completely new and restored by the only specialized company in Brazil. With certificate and restoration video, a true masterpiece in the Brazilian and world computer market! Complete computers, new and restored, from the painting of the case to the final technical customization!

    Unmissable, whoever buys it has bought it! There will never be other opportunities, so stay tuned for our news in this regard!

    And for those who have an old computer (XT/AT/Pentium) and still want to keep it working, bring it to our company! We have new and revised AT power supplies, exclusive IDE/CF adapters to give your old computer an "SSD" hard drive and much more.

    We can even install old rare operating systems, such as PC-DOS/CPM/DOS as well as Windows 3.11 and many others. We have the original floppy disks to install all of them! It is not only the old computer that matters (Hardware) but also that it is operational (Software). At ESIJMJG, vintage computers are taken care of in every aspect, and are not just sold "as is" like 99% of the used market! Here, used computers are worth much more, it is a different concept, they can be used but they are intact, complete in their functional essence.

    Thanks to our partner suppliers, we have unique and exclusive parts for the maintenance of vintage computers, only for use in our laboratory (we do not sell them on the market)!

• AT Power Supplies for XT Computers
• AT Power Supplies for AT standard computers
• XT and AT keyboards, some rare and new
• IDE Hard Drives
• ISA Adapter Card for IDE HD or CF card
• IDE Adapter for CF Card
• 486/Pentium 1/AMD K6 Processors
• New Old Motherboards
• EDO RAM and SDRAM Memories
• IDE Flat Cables
• 3 1/2 and 5 1/4 Floppy Disc (some 360 ​​kb)

    With all this, we will assemble the best vintage machines that the Brazilian market has ever seen! All restored, new cases and painted white! Everything impeccable for the fan market, collectors and museums!

All this only in the only company specialized in computer hardware in Brazil for over 25 years. ESIJMJG!

NOTE: Our company cannot repair computers with integrated CRT monitors, such as the CP500 line and similar. We do not repair/restore printers and CRT monitors! We also do not repair Apple computers!

See you next time

Read More

Restoration, Reengineering and Sales of Vintage Sound Equipments in Brazil. More than 12 Years of Company!

Restoration/Reengineering and Technical Assistance for Vintage Sound Equipment from the 70s/80s/90s. A Brazil Reference Company on social media and in collectors' clubs. See why ESIJMJG is one of the most specialized in Brazil!

    Working with electronics since 1986, JMJG has become the most specialized Electronic Engineer in the circuit maintenance and repair market. After working in large multinational companies in the Electronics sector, always working in the Maintenance/Training sector, he developed advanced technical knowledge in the audio/video market.

    We are the one, of repair and Restoration of Turntables! We love Turntables like no other! 

 When the wood is dead, and the internal circuits not working, the ESIJMJG has the solution to the equipament work well again!

Reengineering of Vintage Amplifiers and Receivers

    With ESIJMJG all this "know-how" came as a bonus, which is why our company is one of the most specialized in Brazil in the repair/restoration of vintage/antique sound equipment such as 3x1/4x1/Stereo Systems/Micro Systems/Walkmans/Tape Decks/Turntables.

    See Below some products that we are Repair or Sale in Brazil!

            Walkmans!

    

Old Radios K7 Deck

Old K7 Recorders

 Old Wood Turntables Stereo Systems

Old Tape Decks

Old Turntables

Old Portable Turntables

Old Speakers Repair 

     We Like Turntables Like No Other! 

    In Brazil, we restore turntables, record players, speakers, tape decks, amplifiers, receivers and much more!

    With our own reengineering, we manufacture wooden cabinets, reengineer internal electronic boards and everything else necessary to make the product operational again.

    We also sell products in this category in Brazil, being one of the references in vintage sound!

    We have a unique Showroom in São Paulo-Brazil. The clients came here, see the product and buy! 

    You can check our best work in our Youtube Channel! 

Read More