https://web.archive.org/web/20231002095607/https://www.electrokits.ro/en/personal-microcomputer-hc-85-1985/ #alternate alternate ELECTROKITS.RO >> Flux ELECTROKITS.RO >> Flux comentarii Flux comentarii ELECTROKITS.RO >> Microcalculatorul personal HC-85 (1985) alternate alternate alternate alternate IFRAME: https://archive.org/includes/donate.php?as_page=1&platform=wb&referer=h ttps%3A//web.archive.org/web/20231002095607/https%3A//www.electrokits.r o/en/personal-microcomputer-hc-85-1985/ Wayback Machine https://www.electrok Go 1 capture 02 Oct 2023 Sep OCT Nov Previous capture 02 Next capture 2022 2023 2024 success fail About this capture COLLECTED BY Collection: Save Page Now TIMESTAMPS loading The Wayback Machine - https://web.archive.org/web/20231002095607/https://www.electrokits.ro/e n/personal-microcomputer-hc-85-1985/ Skip to content * Facebook Group * RSS Feed * Twitter * Pinterest * electrokits.ro logo ELECTROKITS.RO ABOUT TECHNOLOGY AND ELECTRONICS-DIY Search for: ____________________ (BUTTON) Search (BUTTON) Menu * Articles + General knowledge + Elementary electronics + The electronician's laboratory + IoT (Internet Of Things) * Electronic books + Romanian language electronic books + English electronic books + Electronic component catalogs * Electric books * Electrical courses * Physics books * I.T. * Electronic courses + Basic electronics + Embedded electronics + Vintage electronics + Automatica * Electronic magazines + Tehnium Magazine + Conex Club Magazine + Hobby Magazine * DIY electronic kits + ELECTROKITS projects + IPRS Baneasa projects * Privacy * About Us * Contact us * Merchandise shop * Travel Vlog Home Articles Personal microcomputer HC-85 (1985) HC-85 personal microcomputer Personal microcomputer HC-85 (1985) July 11, 2021 Dan Florian Alx Articles, General knowledge 22 comments Reading time: 4 minute The HC-85 microcomputer was designed by Prof. Adrian Petrescu and Francisc Iacob from the Department of Computers at the Polytechnic Institute of Bucharest. The technological preparation for the series production was made by Tudorel Domocos, Traian Mihu and Eugen Dobrovie, Sandu Anghel. The microcomputer belongs to the category of general purpose personal computers. Its performance, software compatibility with the family SINCLAIR, low cost, portability, availability of user-oriented system and application software, gave it a use of wide interest, both in education and for home use by students, and people who wanted to become familiar with computer technology. Technical characteristics of the HC-85 In the complete configuration HC-85 contained: central processing unit, built with Z80 microprocessor, 16 KB permanent EPROM memory and 48 KB main RAM memory, 40-key keyboard, with alphanumeric, control and functional meanings. The display was made on black and white or color TV (PAL), RGB color monitor, and the storage of programs and data was done on audio cassette player. By interfacing a dual unit of 5 1/4 "floppy disk the performance and availability of the system have greatly increased. The inclusion of a standard serial interfaces (IF1) and connecting to an HC-85 personal computer network of up to 64 systems has greatly increased its range of applicability. The serial interface was used for serial communications, for serial coupling with equipment that has a serial interface, and for connecting a printer to the HC-85. In appearance, the HC85 computer was sold in 2 variants. The initial housings were metal, and the keys (40+ reset) were plastic. Below we present a image of the motherboard of the initial version (with metal housing). In the first copies, Soviet, ceramic (white) chips were used for ROM memory. After a while, the design of the computer was changed: plastic case, 34 x 25 x 4 cm, 40 keys + reset. The plastic cases were of 2 colors: black and brown. This housing model has been preserved in later models, HC90, HC91 and HC91 +. For this variant, it was decided to use the chips produced by Microelectronics - MMN2616, plastic. Below we present a image of the motherboard for this variant (with plastic housing). A version with an additional board, HC85 + IF1, was also sold. The IF1 interface is made on a different board, being connected to the motherboard through the extension connector. The expansion of the HC 85 system with the IF1 interface has led to a considerable expansion of the applications of this computer. Below we present a image of the IF1 board. Programs running on the HC-85 HC-85 used its own hardware solutions, different from those found in Sinclair Spectrum but in terms of software compatibility has been maintained. The system and application software from the Sinclair Spectrum system could run smoothly on the HC85 system. Among the existing programs for the SINCLAIR family that have been ported to HC85, we mention: The interpreter for the BASIC language, stored in EPROM, the interpreters / compilers for the languages LOGO, Forth, FORTRAN, PASCAL, C; programs for: word processing (Tasword 2), spreadsheet application (VU-CALC), database (Data Base), 3D graphics (VU-3D), games and The HC-85 microcomputer was accepted and desired by students, young people and adults for the variety of programs and the affordable price. It inspired the creation of similar systems within research and development units, among which we mention in Cluj-Napoca the system RESP, in Brasov system Cobra, in Timisoara TIM-S, at ICE systems HC-88/90, followed by developments regarding the implementation of the CP / M operating system. The computer can be seen at Retro IT Museum in Arad. Below, the room with Romanian computers and the collection of processors inside the museum. Bibliography: http://retroit.ro/ http://www.milisoft.ro/ https://ro.wikipedia.org/ Nicolae Tapus, Information Science and Technology in Romania, Romanian Academy, Romanian Academy Publishing House - Bucharest, 2018 Other educational materials about electronics and more .. * AMIC computer AMIC personal microcomputer (1984) Romanian computerHC-85 computerHC-85HC85 + IF1Z80 microprocessorMMN2616Sinclair Spectrum Navigation in articles Previous Post:DACICC-1 (Automatic Computing Device of the Cluj Computing Institute - 1963) Next Post:PRAE computer - 1980 Related articles HC88, HC90, HC91 and HC2000 computers HC 88 / HC90 / HC91 / HC91 + / HC2000. Home Computer systems produced at ICE July 14, 2021 Dan Florian Alx 1980 PRAE computer PRAE computer - 1980 July 13, 2021 Dan Florian Alx 22 comments 1. Cornel A. say: July 11, 2021 at 11:01 am Yeah Al that sounds pretty crap to me, Looks like BT aint for me either Respond 2. Cristian B. say: July 11, 2021 at 11:02 am In the 80's, having such a thing was a dream. The production was tiny, the price was intentionally kept prohibitive, and to buy anything with a keyboard was subject to the approval of party and state bodies. However, those of my generation have learned programming on these computers. Who wanted, the rest played Chuckie Egg, Video Pool, Rastan, Chronos, Saboteur Respond 1. Michael E. say: July 11, 2021 at 11:34 am There was no state policy on approvals! They just weren't in stock! But they were for sale in the publications of the time, such as Romania Libera. Respond 1. Cristian B. say: July 11, 2021 at 3:37 p.m. Typewriters and printers had to be registered with the Militia. With fingerprint card. A printer could be attached to the computer, so it was the keyboard half of a typewriter. It is just one of the many reasons why no computers were available for sale to individuals. No typewriters. Both devices could be used for subversive purposes. As illogical as it may seem. Respond 3. mirceacluj say: July 11, 2021 at 2:09 p.m. Everything is history now. Respond 4. Cristian B. say: July 11, 2021 at 3:41 p.m. It wasn't until 1991 that I had a poor "JET" (short for "TV screen games"), produced at Electromagnetica. Mounted in a case that was also used for office telephone exchanges, with some black plastic masks where the receiver was supposed to be. It had a fairly modern keyboard with a rubber membrane, but the keys needed some force to be pressed, and it made a sharp click when pressed. But at least they didn't fail. Made almost entirely with Russian TTLs, it is a bit flawed. Mine broke down once, after about a year of operation. The image was off-center and elongated and the address of the lower RAM bench was a bit strange, the car seemed to be stuck on the reverse frame rate, I do not know why. Because of this, some copy programs saved "whirling". The header, instead of producing a continuous tone, was somehow in the form of "salvos." But programs saved this way could be loaded onto a normal Spectrum. Even when the code ran from the top 32 kB, or EPROM, the computer still seemed slower. It is said that the frequency would have been 2,5 MHz instead of 3,5 (stability problems?) I had the white version http://retroit.ro/product/jet/ Respond 5. Konstantin M. say: July 11, 2021 at 3:43 p.m. You could copy Sunday games from TV. It was a special show. If you had a good cassette player or found games in Tehnium magazine, you had to type the "compiler" all day. Respond 1. Cristian B. say: July 11, 2021 at 5:26 p.m. I remember when Tehnium published a program for calculating transformers, one piece at a time, how much space they had. It spread over 5-6 numbers. Respond 1. Constantine M. say: July 11, 2021 at 5:29 p.m. Yes, they sometimes published in fragments, sometimes they didn't have much space... that ..nah, they had to put in the technological achievements of the party. They also praised an electronic engineer that you could not invent something yourself. You also needed an engineer next to you, but in general the publication was interesting. Respond 1. Cristian B. say: July 11, 2021 at 5:40 p.m. I was a student in the 80's, when the above happened, I didn't know much about electronics or programming. Later, in college, I noticed a tendency to make fun of the magazine, telling myself that a lot of the published schemes were either "toys" or wrong, and that the magazine was "amateur." She was not very popular in academia. I didn't get to see if that was the case, or not, times had already changed, after a number of accidental appearances, Tehnium completely ceased to exist. In those years, the publication was the only media outlet that addressed those hobbies. Now, it would be useless, there are thousands of sites, blogs, forums, etc. All this has made the time for specialized magazines come to an end. But, yes, even today, it is good in some areas to have the "engineer" next to you... And not necessarily these things happen only in the technical field Respond 6. MV say: July 11, 2021 at 3:43 p.m. The drawing sheet is missing from this documentation. Respond 7. Nick C. say: July 11, 2021 at 3:44 p.m. I had COBRA, bought as a kit, from the students from Regie, I glued all the components on the motherboard and I assembled the turrets on the keys. The coolest thing was the troubleshooting at commissioning. I think it was around 1985. I still have him in a warehouse, my son taught him programming in Basic. Respond 8. Marius M. say: July 11, 2021 at 3:45 p.m. Yes, it was my first achievement as a passionate electronics engineer. Respond 9. GabrielJ. say: July 11, 2021 at 3:46 p.m. As far as I can remember, most of them used the Romanian clone of Z80, meaning MMN80, which worked somewhere around 3.3 MHz... Respond 10. John I. say: July 11, 2021 at 3:47 p.m. With a pretty good approximation they were all more or less successful Zx-82 clones. Respond 11. No T. say: July 11, 2021 at 3:49 p.m. I have, and I think it's still functional. The power supply is like an anvil! Respond 12. Valerica Z. say: July 11, 2021 at 6:01 p.m. I think it appeared a little later or in a few copies in 1985.... I had barely heard of it then and took my "sinclair spectrum" from the FRG. Respond 13. Vince S. say: July 11, 2021 at 6:03 p.m. In the complete configuration you also needed a TV, and a cassette player to load or download programs, games in particular, apart from circles and dashes I didn't do anything else with the hc... Respond 1. Valerica Z. say: July 11, 2021 at 6:04 p.m. They were very helpful. Both for builders and beginners in programming. Respond 14. Costache E. say: July 12, 2021 at 7:10 am None of the factories producing electronic products and components produce. Some exist by name, while others produce something else. For example, the former Electromures produces signal lamps for the automotive industry, while Tehnoton produces stoves and street furniture. Respond 15. Costache E. say: July 12, 2021 at 7:57 am It is interesting that a variant of Z80 was produced in Romania, as if at IPRS. Also memory chips, but also other logic integrated circuits. We could probably have even produced 386 or 486, so that the production lines existed. But IPRS fell into the hands of businessman Haissam, who bought the factory at a ridiculous price, lying that he owns a company. IPRS, still exists today, accumulating debts of millions of euros. Respond 16. Cosmin D. say: July 14, 2021 at 7:27 am I had something similar. After 7 hours of typing, at a septic game, when I saved the tape, the power went out, I broke my nerves. Respond Add a comment Cancel reply Your email address will not be published. Required fields are marked with * Comment * _____________________________________________ _____________________________________________ _____________________________________________ _____________________________________________ _____________________________________________ _____________________________________________ _____________________________________________ _____________________________________________ Name * ______________________________ Email * ______________________________ Website ______________________________ [ ] Save my name, email, and website in this browser for the next time I comment. Attachment The maximum upload file size: 2 MB. you can upload: image, audio, video, document, spreadsheet, Interactive, text, archive, queues, Other. Links to YouTube, Facebook, Twitter and other services inserted in the comment text will be automatically embedded. Drop files here Post the comment Donate via PayPal Did I help you? I am very glad! If you want, you can thank me for a coffee! PayPal - The safer, easier way to pay online. The latest comments * AskAi on Dr. Phys. Eugen Pavel, Inventor of Hyper CD-ROM (Petabyte Optical Disc) Why do you appreciate Eugen Pavel? * Nekultsy Ivan on Preamplifier with IPRS Baneasa tone corrector - Prospect 8201 The authoritative answer, it is tempting... * enemies on HC 88 / HC90 / HC91 / HC91 + / HC2000. Home Computer systems produced at ICE Great pieces. Keep posting such kind of information on your blog. * monstrosity on HC 88 / HC90 / HC91 / HC91 + / HC2000. Home Computer systems produced at ICE Wonderful, what a website it is! This weblog provides valuable facts to us, keep it up. * cure booking on HC 88 / HC90 / HC91 / HC91 + / HC2000. Home Computer systems produced at ICE Very nice post. I definitely appreciate this site. Thanks! Latest published articles * The wooden transistor could allow us to incorporate electronics into plants June 8, 2023 * How robust are USB Type-C ports? | My experience with the Huawei P20 March 19, 2023 * Top 10 transistor manufacturers December 23, 2022 * Catalog of fixed resistors - Panasonic (2014) August 7, 2022 * Dr. Phys. Eugen Pavel, Inventor of Hyper CD-ROM (Petabyte Optical Disc) August 4, 2022 Article archive * June 2023 (1) * March 2023 (1) * December 2022 (1) * August 2022 (2) * April 2022 (6) * March 2022 (2) * February 2022 (3) * January 2022 (2) * December 2021 (14) * November 2021 (8) * October 2021 (9) * September 2021 (12) * August 2021 (5) * July 2021 (11) * June 2021 (14) * May 2021 (117) * April 2021 (124) * March 2021 (159) * February 2021 (200) Categories * Articles (122) * Automatica (15) * Electric books (28) * Electronic books (175) * English electronic books (40) * Romanian language electronic books (119) * Physics books (3) * Electronic component catalogs (17) * General knowledge (79) * Electrical courses (1) * Electronic courses (118) * Basic electronics (62) * Elementary electronics (13) * Embedded electronics (32) * Vintage electronics (9) * I.T. (2) * IoT (Internet Of Things) (19) * DIY electronic kits (105) * The electronician's laboratory (9) * ELECTROKITS projects (83) * IPRS Baneasa projects (23) * Conex Club Magazine (77) * Hobby Magazine (15) * Tehnium Magazine (44) * Electronic magazines (136) tag Cloud 2N2222 2N3055 antenna Yagi sequential ignition AT89C2051 AT90S1200 AT90S2313 BC337 BC547 BC557 BD912 BS170 CD4011 CD4013 CD4017 CD4093 stable circuit Zener diode Electronics Bucharest audio frequency generator HD44780 IPRS Baneasa acoustic enclosures electronic fireflies LM317 LM317T LM324 LM335 LM358 LM555 LM741 LM3886 LM7805 dynamic light MAX038 MAX232 NE555 organ of lights PIC16F84 </strong> Microcontroller. PIC16F628 </strong> Microcontroller. PIC16F877 </strong> Microcontroller. time relays stabilizing schemes voltage stabilizers the bipolar transistor Welcome! Here you will find DIY electronic kits, books about electronics, physics, electrical, electronic diagrams, electronic circuits, articles about electronics and much more. Quick links * Privacy * Contact us * About Us Partners * Discover.org * Discover Association * Jooble.ro - Jobs * MisterALX Twitch Stream Social share * Facebook Group * RSS Feed * Twitter * Pinterest ELECTROKITS.RO (c) 2011 - 2021 dedicated to electronics enthusiasts Go to Mobile Version