hansotten.bsky.social @hansotten.bsky.social · 15/10/2026A real, printed book packed with BASIC programs for you to type in yourself! Featuring 170 pages in a practical wire-bound format, this book brings the spirit of classic home computing back to life. netzherpes.de/post/we-pres... 12813 0
hansotten.bsky.social @hansotten.bsky.social · 03/10/2026From 1977 tot 1985 the Dutch magazine about electronics, Radio Bulletin published articles about the KIM-1 and developed expansions. I translated the articles to English, the published listings to MOS Tech assembler sources. retro.hansotten.nl/radio-bullet... 0124 0
hansotten.bsky.social @hansotten.bsky.social · 22/09/2026Added one more KIM-1 program today. Not from Radio Bulletin, but from Byte Book of Computer Music 1979: Teach KIM to Sing retro.hansotten.nl/6502-sbc/kim... 083 0
hansotten.bsky.social @hansotten.bsky.social · 20/09/2026Radio Bulletin published many articles around the KIM-1 in Dutch. I started a new project: translate the articles to English wit source, binary Articles now published Mastermind on the KIM Morse decoding with the KIM Melodiant Frequencymeter EPROM Programmer retro.hansotten.nl/radio-bullet... 194 0
hansotten.bsky.social @hansotten.bsky.social · 09/09/2026MICROCALCULATOR MODEL-85 A board that serves as a calculator accessible via a parallel 8 bit port, e.g. from a KIM-1. Send commands and read the calculated results. Made by Artisan Electronics in 1977. Acquired August 2026, as built in a KIM-1 with KIMSI system 1104 0
hansotten.bsky.social @hansotten.bsky.social · 29/08/2026Found a scan of 'Microprocessor programming and applications for scientists and engineers (Richard R. Smardzewski' Aimed at the 6502 with AIM 65 examples. retro.hansotten.nl/microprocess... 070 0
hansotten.bsky.social @hansotten.bsky.social · 23/08/2026A boxed VIM-1 acquired in August 2026. The early SYM-1, the rename due to a naming conflict. 052 0
hansotten.bsky.social @hansotten.bsky.social · 23/08/2026In August 2026 I acquired an boxed engineering [SYM-2]prototype. It comes with two large circuit diagrams illustrating the design. retro.hansotten.nl/6502-sbc/syn... 0122 0
hansotten.bsky.social @hansotten.bsky.social · 22/08/2026Forethought Systems produced a motherboard, the KIMSI, for the KIM-1 in 1977 that enables to add 8 S-100 boards to a KIM-1. Photos and a high quality manual and brochure retro.hansotten.nl/6502-sbc/kim... 1102 0
hansotten.bsky.social @hansotten.bsky.social · 16/08/2026With a system with a KIM-1 and a KIMSI I acquired came a board. The board is connected to the Application connector. IT has the markings microcalculator model-85. The display is made by HP 7447632K 14 digits. there are some unidentified ICs, 1CA-85, 1CD-85A. Any clue? 131 0
hansotten.bsky.social @hansotten.bsky.social · 14/08/2026With thanks to Jonathan Chapman of Glitchworks who found a Jolt system, here images of a Jolt with 4K memory, an experimenters board and the power supply. Here the images: retro.hansotten.nl/6502-sbc/jol... 031 0
hansotten.bsky.social @hansotten.bsky.social · 03/08/2026KB-9 or MOS TECH 6502 BASIC V1.1, a 9 digit BASIC for the KIM-1 The same BASIC as in the first PET , OSI, Applesoft. One of the first products of MICRO-SOFT Telephone support by Bill Gates and Paul Allen! Updated, improved and enhanced information and downloads retro.hansotten.nl/6502-sbc/kim... 021 0
hansotten.bsky.social @hansotten.bsky.social · 09/07/2026Thanks to Eduardo, KIM usernotes Vol 6 021 0
hansotten.bsky.social @hansotten.bsky.social · 29/06/2026Many sources of the KIM-1 monitor are floating around None deliver the real KIM-1 ROMs, . So in June 2026 I have typed in the source as listed in the User manual. Converted to MOS Tech assembler format, delivers the exact ROM binary including 00 filler bytes. retro.hansotten.nl/correct-kim-... 0185 0
hansotten.bsky.social @hansotten.bsky.social · 26/06/2026MOStermind is an implementation of the Mastermind board game for the KIM-1 computer. Developed by HKZ. codeberg.org/hkzlab/MOSte... Does it run on the KIM-1 Simulator? YES! You only have to set the FOCAL_V3D break setting in the Settings. 052 0
hansotten.bsky.social @hansotten.bsky.social · 23/06/2026I saw an advert on ebay (China seller) for a Rockwell 6503 IC 40 pin. The 6503 has 28! I ordered one I searched the internet for the 338-6503 printed on the IC and found references to it being a R65C02. And indeed, the 6502 testers recognized it as working 65C02. Weird! 121 0
hansotten.bsky.social @hansotten.bsky.social · 14/06/2026I acquired a 1 MHz IC R6500/1E Microprocessor Emulator Device, an IC made by Rockwell for developing applications for the R6500/1 Microcomputer family. More information on the R6500/1 retro.hansotten.nl/6502-sbc/aim... 072 0
hansotten.bsky.social @hansotten.bsky.social · 25/05/2026A KIM-3B is a 8K bytes memory expansion made by MOS Technology (already part of Commodore then) for the KIM-4 motherboard. I recently acquired a good looking KIM-3B myself. Nothing new, all is already known about it. Now with photos made by myself! 0111 0
hansotten.bsky.social @hansotten.bsky.social · 24/05/2026New version of the KIM-1 Simulator coming: complete VT100 support in the console! 082 0
hansotten.bsky.social @hansotten.bsky.social · 24/05/2026TERC, an educational center, has developed around 1980 an interface system for the KIM-1. It makes the I/O available with solderless connections, has a breadbaord and connections for audio tape input/output, power supply and teletype. I recently acquired this up till now unknown interface. 070 0
hansotten.bsky.social @hansotten.bsky.social · 10/05/2026Nice to see my white 6502 CPU is OK, and is indeed missing the ROR instruction. 240 0
hansotten.bsky.social @hansotten.bsky.social · 24/04/2026R65 – A late seventies computer built with a KIM-1 by Rene Richarz. An amazing showcase of how far a KIM-1 and Pascal as programming language can go! Information on the R65 and emulator of this computer on github archive of Rene Richarz Including sources and documentation github.com/rricharz/R65 131 0
hansotten.bsky.social @hansotten.bsky.social · 17/04/2026MTU K-1013 FDC emulation added to the KIM-1 Simulator. Eduardo Casino added the FDC support. Now not only the SD Shield but also the upd765 based FDC support allows to run CP/M-65 and the native CODOS for KIM-1 operating systems. retro.hansotten.nl/6502-sbc/kim... 022 0
hansotten.bsky.social @hansotten.bsky.social · 05/04/2026Wanted a case for a KIM-1? Options in the 80ties were available. Here an example, suitable for educational purposes. 162 0
hansotten.bsky.social @hansotten.bsky.social · 05/04/2026But reading a tape from another user was always a time consuming challenge. Even tapes bought with Microsoft Basic KB9 or Microchess and MICRO ADE took several hours to get it right. 020 0
hansotten.bsky.social @hansotten.bsky.social · 03/04/2026What changed in the KIM-1 Revisions? The PCB underwent several changes around the logo area, takeover by Commodore . The big change was in the clock circuit between the first edition and Rev A. The first batch of KIM-1 suffered from the issue that the clock would not start. It was fixed in Rev A. 331 0
hansotten.bsky.social @hansotten.bsky.social · 27/03/2026New versions of KIM-1 Simulator (V2.0.0) with SD Card Shield, CP/M-65 and xKIM, and Jolt Simulator (V0.9). Read all about it here: retro.hansotten.nl/new-versions... 052 0
hansotten.bsky.social @hansotten.bsky.social · 26/03/2026Eduardo Casino has created a faithful replica of the Jolt single board computer. 6502,6530-004 TIM and 6520. TTY or RS232C 512b RAM. He designed using the information available. The replica on GitHub, github.com/eduardocasin... More information on the Jolt, retro.hansotten.nl/6502-sbc/jol... 053 0
hansotten.bsky.social @hansotten.bsky.social · 23/03/2026White KIM-1 cleanup This one is a Rev D with a ‘white’ PCB. The KIM-1 is working. The keyboard handmade@. With the DIY keypad method based upon the work of Eduardo Casino and Pete (peo2000)I replaced the keyboard Wires removed clean with alcohol and a brush this KIM-1 may join my collection 022 0
hansotten.bsky.social @hansotten.bsky.social · 21/03/2026A spare KIM-1 keypad is even rarer than a KIM-1 itself. With this guide you can build a reasonable replica of the keypad. Thanks to the work of Eduardo Casino (the PCB) and Pete (peo2000 on forum64.org) I have published a DIY guide for a KIM-1 keypad replica. retro.hansotten.nl/6502-sbc/kim... 0282 0
hansotten.bsky.social @hansotten.bsky.social · 16/03/2026In 2025 Franz Achatz revived the A-ONE Apple 1 replica. The excellent design is refreshed, a new family member added: the A-ONE PLUS. I now have the 2025 standard board, the 2025 PLUS and the 2006 EXTENDED. With the prototype boards and cassette interface. retro.hansotten.nl/6502-sbc/app... 191 0
hansotten.bsky.social @hansotten.bsky.social · 18/02/2026New project, cleanup and restore this KIM-1 . Poor thing still works but had a rough life. KIM-1 collection complete now .. 0143 0
hansotten.bsky.social @hansotten.bsky.social · 09/02/2026Royce Taft has a MACH-9 MMS Inc 6809 CPU Plug-in for AIM 65 and reverse engineered it. He sent me his design to be published here. retro.hansotten.nl/6502-sbc/aim... 332 0
hansotten.bsky.social @hansotten.bsky.social · 03/02/2026The PLEASE package was published as two documents: INSTRUCTIONS and LISTING. In 2025 I received V2 of the LISTING and the Instruction. Jeff and Kenneth White received V1 of Vern Graner. All this including sources typed in now available here: retro.hansotten.nl/6502-sbc/kim... 022 0
hansotten.bsky.social @hansotten.bsky.social · 30/01/2026KIM1 MOD replica KIM-1 by Voyageur. Battery powered. FM1808 for ROM and RAM keeps contents. From Google group PAL 6502 computer Read aboutKIM1Mod :http://retro.hansotten.nl/6502-sbc/kim-1-manuals-and-software/my-kim-1-family/kim-replicas-and-clones/kim-1-portable-version-made-by-voyageur6502/ 051 0
hansotten.bsky.social @hansotten.bsky.social · 28/01/2026PicoSYM, a SYM-1 emulator on a Raspberry Pico Emulation of Synertek SYM-1 on a Pico By andysa on 6502.org Read about it: retro.hansotten.nl/6502-sbc/syn... PicoSYM emulates a SYM-1 with the Supermon V1.1 Monitor, Basic, RAE Assembler & Editor and 1541DOS at the typical addresses. . 054 0
hansotten.bsky.social @hansotten.bsky.social · 18/01/2026Which transistors are used int he KIM-1 and clones? The LED driver and serial circuit require transistors. MOS used 2N5371 and 2N5375, in later KIM-1s a wider variety. A question in forum64.de in the Nachbau KIM-1 thread made me look at my KIM-1 retro.hansotten.nl/6502-sbc/kim... 012 0
hansotten.bsky.social @hansotten.bsky.social · 16/01/202650 years of KIM-1! The birth can be traced to January 1976. The sale ended in 1981. KIM is Dead!!! Long KIM!!! 0114 0
hansotten.bsky.social @hansotten.bsky.social · 16/01/2026Found it. Computer! June 1981 Issue 13 Page 34 KIM is Dead!!! Long Live KIM!!! 110 0
hansotten.bsky.social @hansotten.bsky.social · 14/01/202650 years of KIM-1: KIM Clones Vince Briel was the first with the MicroKIM. replacement of the 6530 RRIOT with a 6532 RIOT and an external ROM. The idea from Ruud Baltissen. The PAL-1 and PAL-2 still available Top Briel MicroKIM, Corsham KIM Clone and PAL-2. Bottom PAL-1 , Corsham breadboard. 010 0
hansotten.bsky.social @hansotten.bsky.social · 14/01/2026Not only Edison, but the Solo OS with Concurrent Pascal by Per Brinch Hansen, can run in simh: pascal.hansotten.com/2026/01/13/s... 000 0
hansotten.bsky.social @hansotten.bsky.social · 14/01/202650 years of KIM-1 and me retro.hansotten.nl/50-years-of-... I have collected some KIM-1's over the years. The first KIM-1 in 1978, and now I have nine original KIM-1s, from first edition to Rev A, B, D, E , 2x F, 2xG. And several reproductions with 6532's as replacements. 095 0
hansotten.bsky.social @hansotten.bsky.social · 10/01/2026The Edison system, language and OS. Per Brinch Hansen, the master of simplicity in IT. Book from 1982, disks dumped in 2025, files extracted in 2026. And with simh you can run the Edison system. pascal.hansotten.com/per-brinch-h... 010 0
hansotten.bsky.social @hansotten.bsky.social · 05/01/2026Faithful replica by Eduardo Casino of the K‑1002 8‑bit audio Digital‑to‑Analog Converter card for the KIM‑1, SYM‑1, and AIM‑65 computers, originally designed by MTU in the late ’70s. github.com/eduardocasin... 073 0
