yann64andClaude Opus 5.5
b274874139
1,289 discussions, 9,527 archived comments; pages no longer carry the comments themselves. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
108 lines
3.8 KiB
Markdown
108 lines
3.8 KiB
Markdown
---
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title: ELEKTOR Junior Computer
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categories:
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- Computers
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types:
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- Home Computer
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origins:
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- Germany
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years:
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- '1980'
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cpus:
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- Rockwell 6502
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params:
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name: Junior Computer
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image: /media/museum/photos/junior-computers_1_350px.jpg
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company: /companies/elektor
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company_name: ELEKTOR
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specs:
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- label: NAME
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value: Junior Computer
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- label: MANUFACTURER
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value: Elektor
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- label: TYPE
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value: Home Computer
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- label: ORIGIN
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value: Germany
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- label: YEAR
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value: '1980'
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- label: BUILT IN LANGUAGE
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value: Monitor
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- label: KEYBOARD
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value: 23 keys hexadecimal keyboard
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- label: CPU
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value: Rockwell 6502
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- label: SPEED
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value: 1 MHz
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- label: CO-PROCESSOR
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value: PIA 6532 and EPROM 2708 (1K)
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- label: RAM
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value: 1 Kb RAM + 128 bytes from the PIA 6532
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- label: ROM
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value: 1 Kb EPROM (monitor)
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- label: TEXT MODES
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value: seven segments LED display x 6
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- label: GRAPHIC MODES
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value: None
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- label: COLORS
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value: None
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- label: SOUND
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value: None
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- label: I/O PORTS
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value: Port connector (31 pins), Expansion connector (64 pins)
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- label: POWER SUPPLY
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value: External power supply (+5v, +12v, -5v)
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tabs:
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- photos
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- links
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forum_thread: 1292
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photos:
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- title: JUNIOR COMPUTER
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subtitle: ''
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text: |-
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Complete system with power supply board
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Thanks to Denis Faivre for this picture
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image: null
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- title: MOTHERBOARD
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subtitle: ''
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text: Thanks to Denis Faivre for this picture
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image: null
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- title: JUNIOR COMPUTER
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subtitle: ''
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text: Thanks to http://retro.hansotten.nl/ for this picture
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image: null
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- title: JUNIOR COMPUTER IN A WOODEN CASE
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subtitle: ''
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text: Thanks to http://retro.hansotten.nl/ for this picture
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image: null
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- title: ORIGINAL ARTICLE FROM ELEKTUUR
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subtitle: ''
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text: dated march 1980
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image: null
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links:
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- title: Retro Computing / About small SBC systems
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url: http://retro.hansotten.nl/6502-sbc/elektuur-junior/
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text: Hans Otten website, full info information about 8-bit small computer systems computing and electronics, including the Junior Computer
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oc_id: 1327
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source:
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url: https://web.archive.org/web/20221204084526/http://www.old-computers.com/museum/computer.asp?c=1327
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date: '2022-12-04'
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---
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The Junior computer design was published by Elektuur/Elektor magazine from 1980 on. It was published in a series of magazine articles, four books and several socalled paperware A4 booklets. Loys Nachtmann designed and developed the the Junior Computer. G.H. Nachbar did the Dutch translation of the German books. The 4 Junior books were translated into English, German, Spanish, Italian and French as well.
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The Junior design is in fact heavily inspired by the hardware of the [KIM-1](/museum/mos-technology-kim-1/) (or call it a clone ..). It didn't use though the 6530 specialised chip from MOS Technology (I/O + ROM), but rather the PIA 6532 and an EPROM 2708. The floppy interface design was based on the Ohio Scientific OS65D design.
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It was delivered as a kit or could be be built from only the PCB’s sold by Elektuur. Many hobbyist have build one. Later extended with an adapted version of the 8K KB9 Basic and even a disk operating system (Ohio Scientific DOS OS65D).
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Many expansion cards were available. These include an input-output board (including a VIA 6522, a tape interface and an RS232 port), a VDU (video terminal) card (actually an evolution of elekterminal), an EPROM/SRAM card, a 16/64 KB DRAM card, an EPROM programmer board and even a floppy drive controller based on the Ohio Scientific DOS OS65D.
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A BASIC interpreter was also available, derived from Microsoft's KB94.
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Many Junior Computers were built, either from the PCB made by Elektuur and separate components or as a complete kit.
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---
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Thanks to Denis Faivre for the pictures and to retro.hansotten.nl for some of the info.
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