06.03.2026 18:47
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Yes, I remember very well. The first PET 2001 that was imported in the Netherlands. I was having one for a review for a magazine several weeks. My first review of a home computer!
Amazed at the power and functionality and the horrible keyboard!
get well soon!
And lets not forget the serial TTY support. Also bit-banging. Amazing what you can do with less than 2Kb of 6502 code and one 6530 RRIOT.
As is the handling of the audio tape load and save. All bit-banging! So clever for the year it was written, 1975! No AI, no libraries and books full of 6502 knowledge, the first to crack this on a 6502. The KIM-1 monitor is an excellent study onject.
Here is a brief document showing commands available and an introduction to using the assembler: github.com/DavidJRichar...
Best regards, David
The KIM-1 had 1K of RAM and a hex keypad. No screen. No keyboard. No storage. And yet people wrote chess programs for it. In hex. By hand. We were not okay.
Adventue - Colossal Cave got a full port to the KIM-1 by Ryan Roth. What a Hero.
github.com/ryaneroth/Ad...
#65o2 #kim1
One ROM Hardware Guide: Getting Started with One ROM #1
#RetroComputing #OneROM #HardwareHacking #8bit #VintageComputing #ROM #Commodore #RetroTech #DIYElectronics
theoasisbbs.com/one-rom-hard...
The Jolt shipped in december 1975, see the Micro Associates newsletters. All about 6530 RRIOTs, it is a large family on my website retro.hansotten.nl/6502-sbc/653...
I did not say that. The RRIOT KIM 6530-002 was designed in 1975. The KIM-1 with 6530-002 and 6530-003 shipped in 1976. The User manual is dated January 1976, advertisements and magazine articles appeared in the first quarter of 1976.
welcome back, been quiet without you!
New project, cleanup and restore this KIM-1 . Poor thing still works but had a rough life. KIM-1 collection complete now ..
The RRIOTs 6530 -004 TIM and 6530-002 KIM were developed at the same time in 1975. The computers JOLT and KIM-1 shipped end 1975 begin 1976 based upon these.
great!
alas no manuals have surfaced yet. only dumps of the roms
Kicad design files added thanks Royce Taft!
retro.hansotten.nl/6502-sbc/aim...
Royce 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...
Full video of the KIM-1 kernal, functional disk drive, and authentic Commodore BASIC all running directly on a Commodore 1541 disk drive!!! Meet FranKIMstein youtu.be/yyDtIBbYES0
#Commodore #KIM1 #RetroComputing #C64Reposts
Troubleshoot a 6502?
See this session: atariprojects.org/2024/10/19/t...
The 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...
i have tried to publish the Herwig Feichtunger books and the Funkschau articles all on my website.
MB Immerzeel, a colleague at the magazine Radio Bulletin/Uitgeverijj de Muiderkring around 1980! and that was the last time we worked together.
Since this has only meaning with games and such the speed of the CPU also has to match 1 MHz. To run all First Book of KIM programs the timers also have to work.
What I am thinking about is having the hardware level update a virtual display in memory and having a timer/separate thread copy that virtual display from memory to the screen as static led segments.
Perhaps I could match 1 MHz. I do count cycles already. Might also help to implement timers of the 6532, as now it makes not much sense.
i failed also to add that to my emulator. Bit banging visual objects without flicker fast enough, that is hard. So I cheat, and only have hexadecimal via the patched KIM-1 monitor entry.
You know the KIM-1 by now, but what about the SYM-1?
retro.hansotten.nl/6502-sbc/synertek-sym-ktm/
KIM1 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/
I do use Facebook and Google groups though for interesting groups but no personal data, no real alternatives.
Twitter/X has crossed a line, that is beyond evil.