an online Instagram web viewer
  • vitaskhr
    Vintage portable computers
    @vitaskhr

Images by vitaskhr

Elektronika KR-02 "Radio-86RK", 1989. Cheap Russian DIY computer kit for hobbyists made in 1989. I was asked about sound demo in the comments.  The sound on this video goes thru "Tape out" directly to the tape player. This was possible only in BASIC "Micron" using BEEP command. #vintage #homecomputer #vintagecomputer #oldtech #retrocomputer  #russiancomputer #radio86rk #kr580vm80a #kr02 #diy
Radio-86RK "Elektronika KR-02", 1989. Russian DIY home computer. Fully restored. Looks like it was damaged by power spike. The schematics were published in Russian magazine "Radio" in 1986. The home computer has only 29 chips. This particular kit included a motherboard, keyboard, power supply, cables and a cassette with RAM test, 2 variants of BASIC, Assembler and Disassembler, dozen of games. The 28 year old MK60-6 cassette is surprisingly  completely readable. The case is handmade. Each proud owner of the kit is supposed to build their own case from metal, wood, paper or from whatever they can find. The speaker is also was not included. I refreshed and cleaned the keyboard but left the case as is. Just to preserve the atmosphere of 80s. Specs: 8-bit CPU KR580VM80A is running on 1.77Mhz, RAM 16Kb. Can be extended up to 32Kb. ROM 2kb. Needs a tape recorder to load/save software  #vintage #collectable #homecomputer #vintagecomputer #oldtech #retrocomputer  #russiancomputer #radio86rk #kr580vm80a #kr02 #diy
Radio-86RK "Elektronika KR-02", 1989. Russian DIY home computer. Fully restored. Looks like it was damaged by power spike. The schematics were published in Russian magazine "Radio" in 1986. The home computer has only 29 chips. This particular kit included a motherboard, keyboard, power supply, cables and a cassette with RAM test, 2 variants of BASIC, Assembler and Disassembler, dozen of games. The 28 year old MK60-6 cassette is surprisingly completely readable. The case is handmade. Each proud owner of the kit is supposed to build their own case from metal, wood, paper or from whatever they can find. The speaker is also was not included. I refreshed and cleaned the keyboard but left the case as is. Just to preserve the atmosphere of 80s. Specs: 8-bit CPU KR580VM80A is running on 1.77Mhz, RAM 16Kb. Can be extended up to 32Kb. ROM 2kb. Needs a tape recorder to load/save software #vintage  #collectable  #homecomputer  #vintagecomputer  #oldtech  #retrocomputer  #russiancomputer  #radio86rk  #kr580vm80a  #kr02  #diy 
Radio-86RK "Elektronika KR-02", 1989. Russian DIY home computer. Fully restored. Looks like it was damaged by power spike. I replaced almost all chips. Even an amplifier chip "tape in" was bad.The schematics were published in Russian magazine "Radio" in 1986. The home computer has only 29 chips. This particular kit included a motherboard, keyboard, power supply, cables and a cassette with RAM test, 2 variants of BASIC, Assembler and Disassembler, dozen of games. The 28 year old MK60-6 cassette is surprisingly  completely readable. The case is handmade. Each proud owner of the kit is supposed to build their own case from metal, wood, paper or from whatever they can find. The speaker is also was not included. I refreshed and cleaned the keyboard but left the case as is. Just to preserve the atmosphere of 80s. Specs: 8-bit CPU KR580VM80A is running on 1.77Mhz, RAM 16Kb. Can be extended up to 32Kb. ROM 2kb. Needs a tape recorder to load/save software. Got one Russian made tape recorder Vega 250 from Ebay.  #vintage #collectable #homecomputer #vintagecomputer #oldtech #retrocomputer  #russiancomputer #radio86rk #kr580vm80a #kr02 #diy
Radio-86RK "Elektronika KR-02", 1989. Russian DIY home computer. Fully restored. Looks like it was damaged by power spike. I replaced almost all chips. Even an amplifier chip "tape in" was bad.The schematics were published in Russian magazine "Radio" in 1986. The home computer has only 29 chips. This particular kit included a motherboard, keyboard, power supply, cables and a cassette with RAM test, 2 variants of BASIC, Assembler and Disassembler, dozen of games. The 28 year old MK60-6 cassette is surprisingly completely readable. The case is handmade. Each proud owner of the kit is supposed to build their own case from metal, wood, paper or from whatever they can find. The speaker is also was not included. I refreshed and cleaned the keyboard but left the case as is. Just to preserve the atmosphere of 80s. Specs: 8-bit CPU KR580VM80A is running on 1.77Mhz, RAM 16Kb. Can be extended up to 32Kb. ROM 2kb. Needs a tape recorder to load/save software. Got one Russian made tape recorder Vega 250 from Ebay. #vintage  #collectable  #homecomputer  #vintagecomputer  #oldtech  #retrocomputer  #russiancomputer  #radio86rk  #kr580vm80a  #kr02  #diy 
Elektronika KR-02 "Radio-86RK", Made in 1989. Russian 80s home computer sold as a cheapest DIY kit. The motherboard has been fixed. Found few short circuits under chips caused by old solder. BIOS chip was dead. The replacement  EPROM 2716  did not work somehow. Found original Russian KR573RF5 chips on Ebay. They worked very unstable even when my TL866 programmer said that software is ok there. The lifehack is to burn  this chip 10 times in a row with the same codes. Looks like one time is not enough even if the programmer can read it back. Also, this old Russian DIY kit has almost dead RAM KM581RU4. There is almost nothing to google about this memory but it looks like it's a 4116 clone with -5V required. I tried Mostek Apple 4116, TMS4116 but Motorola MCM4116BP20 worked the best  #vintage #collectable #homecomputer #vintagecomputer #retrocomputer #vintagecomputing #russiancomputer #repair #radio86rk #kr580vm80a #oldtech #kr02
Elektronika KR-02 "Radio-86RK", Made in 1989. Russian 80s home computer sold as a cheapest DIY kit. The motherboard has been fixed. Found few short circuits under chips caused by old solder. BIOS chip was dead. The replacement EPROM 2716 did not work somehow. Found original Russian KR573RF5 chips on Ebay. They worked very unstable even when my TL866 programmer said that software is ok there. The lifehack is to burn this chip 10 times in a row with the same codes. Looks like one time is not enough even if the programmer can read it back. Also, this old Russian DIY kit has almost dead RAM KM581RU4. There is almost nothing to google about this memory but it looks like it's a 4116 clone with -5V required. I tried Mostek Apple 4116, TMS4116 but Motorola MCM4116BP20 worked the best #vintage  #collectable  #homecomputer  #vintagecomputer  #retrocomputer  #vintagecomputing  #russiancomputer  #repair  #radio86rk  #kr580vm80a  #oldtech  #kr02 
DIY Radio-86RK, designed in 1986. It works. I had to replace CPU  Intel 8080 by KR580VM80A. Both my I8080 chips did not work. All my KR580 cpus work even if they look like survived a fire. Also Intel P8212 died after 20 minutes of playing Tetris and was replaced by K589IR12 #radio86rk #homecomputer #classiccomputer #retrocomputer #pcb #russiancomputer #retrotech #oldcomputer
Day 4. DIY newly soldered Radio-86RK, originally designed in 1986 in Russia for electronics hobbists, is ready to be powered on. In my opinion I installed latest and greatest chips I had for a successful test.  Well, I8080 is from 70s but looks much better than a Soviet clone KR580VM80A. The clone is what worked in this computer in 80s but the doc on  radio86rk.pbworks.com is telling me that I can use original Intel chips. Then I will replace the working logic by Russian logic I received from Bulgarian and  Hungarian Ebay sellers. It's a coffee cup of dirty chips with bent pins. #radio86rk #homecomputer #classiccomputer #retrocomputer #pcb #russiancomputer #retrotech #oldcomputer
Day 4. DIY newly soldered Radio-86RK, originally designed in 1986 in Russia for electronics hobbists, is ready to be powered on. In my opinion I installed latest and greatest chips I had for a successful test. Well, I8080 is from 70s but looks much better than a Soviet clone KR580VM80A. The clone is what worked in this computer in 80s but the doc on radio86rk.pbworks.com is telling me that I can use original Intel chips. Then I will replace the working logic by Russian logic I received from Bulgarian and Hungarian Ebay sellers. It's a coffee cup of dirty chips with bent pins. #radio86rk  #homecomputer  #classiccomputer  #retrocomputer  #pcb  #russiancomputer  #retrotech  #oldcomputer 
Day 3. Everything is soldered to DIY Radio-86RK, originally designed in 1985-1986 in Russia for electronics hobbyists. The board passed OK a power test without microchips in sockets. Next step is fun part. I need to program ROMs to get a font+BIOS and ATMega chip which will convert PS/2 keyboard codes to RK86 key matrix. #radio86rk #homecomputer #classiccomputer #retrocomputer #pcb #russiancomputer #retrotech #oldcomputer
Day 2 of soldering new DIY vintage home computer Radio-86RK #radio86rk #homecomputer #classiccomputer #retrocomputer #pcb #russiancomputer #retrotech #oldcomputer
Back to non-working Russian home computer "Radio-86RK" from 1989. The kit I have for recovery is based on completely DIY computer schematics published in "Radio" magazine in 1986. People assembled it from scratch. There were no same looking home made computer. So, I decided to go the same vintage way and solder my version of Radio-86RK and use it as a lab to recover my 1989 "Elektronika KR-02" factory kit. I found schematics on radio86rk.pbworks.com. It's compacted to mini-ITX pcb and can use ATX power supply + optional ps/2 keyboard controller if I do not want to make my own vintage keyboard. But probably I'll make it.  Also, 8/16 memory chips replaced by one modern SRAM chip. The rest of the computer is the same as it was in 1986. Just finished to solder resistors. #radio86rk #homecomputer #classiccomputer #retrocomputer #pcb #russiancomputer #retrotech #oldcomputer
Back to non-working Russian home computer "Radio-86RK" from 1989. The kit I have for recovery is based on completely DIY computer schematics published in "Radio" magazine in 1986. People assembled it from scratch. There were no same looking home made computer. So, I decided to go the same vintage way and solder my version of Radio-86RK and use it as a lab to recover my 1989 "Elektronika KR-02" factory kit. I found schematics on radio86rk.pbworks.com. It's compacted to mini-ITX pcb and can use ATX power supply + optional ps/2 keyboard controller if I do not want to make my own vintage keyboard. But probably I'll make it. Also, 8/16 memory chips replaced by one modern SRAM chip. The rest of the computer is the same as it was in 1986. Just finished to solder resistors. #radio86rk  #homecomputer  #classiccomputer  #retrocomputer  #pcb  #russiancomputer  #retrotech  #oldcomputer 
Amiga 500, 1987-1992. Completely repaired and functional.  CPU: 32-bit Motorola 68000 7.15909MHz with 16-bit ALU and 24-bit address bus, RAM 512Kb + I got 512Kb extended memory on a card as a unexpected bonus. Video NTSC: 320x200 32 colors, 640x200 16 colors. Colors can be picked from 4096 total colors or they can be shown altogether using HAM mode. Sound: 4 hardware channels, stereo: 2 left + 2 right, 8-bit PCM. #amiga500 #Amiga #homecomputer #vintagecomputer #classiccomputer #retrotech #oldtech #olympus #retrocomputer
Amiga 500, 1987-1992. Completely repaired and functional. CPU: 32-bit Motorola 68000 7.15909MHz with 16-bit ALU and 24-bit address bus, RAM 512Kb + I got 512Kb extended memory on a card as a unexpected bonus. Video NTSC: 320x200 32 colors, 640x200 16 colors. Colors can be picked from 4096 total colors or they can be shown altogether using HAM mode. Sound: 4 hardware channels, stereo: 2 left + 2 right, 8-bit PCM. #amiga500  #Amiga  #homecomputer  #vintagecomputer  #classiccomputer  #retrotech  #oldtech  #olympus  #retrocomputer 
Atari 130XE, 1985-1992. CPU MOS Technology 6502C 1.79 MHz, RAM 128Kb, ROM 24K, 320x192 256 colors. Testing old medical monitor Olympus OEV-203 which is actually rebadge of Sony PVM-20M2MDU. Retro home  computers show much better image on commercial  grade Trinitron CRTs than on consumer LCDs  and do not care about whether its PAL or NTSC and they have a lot of connectors including BNC RGB + sync. No more  pain how to plug that old East Europe computer and get some colors from it.  Whoohoo #Atari #xe130 #oldtech #retrocomputer #classiccomputer #homecomputer #vintagecomputer #olympus #trinitron
Atari 130XE, 1985-1992. CPU MOS Technology 6502C 1.79 MHz, RAM 128Kb, ROM 24K, 320x192 256 colors. Testing old medical monitor Olympus OEV-203 which is actually rebadge of Sony PVM-20M2MDU. Retro home computers show much better image on commercial grade Trinitron CRTs than on consumer LCDs and do not care about whether its PAL or NTSC and they have a lot of connectors including BNC RGB + sync. No more pain how to plug that old East Europe computer and get some colors from it. Whoohoo #Atari  #xe130  #oldtech  #retrocomputer  #classiccomputer  #homecomputer  #vintagecomputer  #olympus  #trinitron 
Amiga 500, 1987-1992. The motherboard was repaired successfully.  1488P chip was replaced by new one. Somehow the old chip caused a short circuit and overheated. It's 29C now and everything seems are working ok including both floppy drives and Amiga mouse. Yes, that boxy mouse with a ball. Time to clean the computer case and assemble everything back. #amiga500 #Amiga #homecomputer #vintagecomputer #classiccomputer #retrotech #oldtech #motherboard #retrocomputer #repair