@hansotten.bsky.social
The KIM-1 Simulator has seen some small updates, to version 1.5.4 Fresh version at retro.hansotten.nl/6502-sbc/kim...
The behaviour of the TTY/LED keypad switch is now closer to how the real KIM-1 behaves.
The behaviour of the TTY/LED keypad switch is now closer to how the real KIM-1 behaves.
KIM-1 Simulator – Retro Computing
retro.hansotten.nl
November 11, 2025 at 1:54 PM
The KIM-1 Simulator has seen some small updates, to version 1.5.4 Fresh version at retro.hansotten.nl/6502-sbc/kim...
The behaviour of the TTY/LED keypad switch is now closer to how the real KIM-1 behaves.
The behaviour of the TTY/LED keypad switch is now closer to how the real KIM-1 behaves.
Reposted
Wait a minute - Jean-Michel Jarre used a KIM-1 on Equinoxe? C’est fantastique!
www.ina.fr/ina-eclaire-...
www.ina.fr/ina-eclaire-...
November 10, 2025 at 12:40 AM
Wait a minute - Jean-Michel Jarre used a KIM-1 on Equinoxe? C’est fantastique!
www.ina.fr/ina-eclaire-...
www.ina.fr/ina-eclaire-...
Reposted
and also recall what this video led to:
github.com/eduardocasin...
github.com/eduardocasin...
November 9, 2025 at 8:12 PM
and also recall what this video led to:
github.com/eduardocasin...
github.com/eduardocasin...
KIM-1 Rev D building progress.
All passive components acquired and soldered on.
Keyboard assembled, will be connected via low profile pin connector.
Next step is testing power distribution to all IC sockets.
Then the Reset and NMI circuits with the 556 timer.
All passive components acquired and soldered on.
Keyboard assembled, will be connected via low profile pin connector.
Next step is testing power distribution to all IC sockets.
Then the Reset and NMI circuits with the 556 timer.
November 9, 2025 at 4:46 PM
KIM-1 Rev D building progress.
All passive components acquired and soldered on.
Keyboard assembled, will be connected via low profile pin connector.
Next step is testing power distribution to all IC sockets.
Then the Reset and NMI circuits with the 556 timer.
All passive components acquired and soldered on.
Keyboard assembled, will be connected via low profile pin connector.
Next step is testing power distribution to all IC sockets.
Then the Reset and NMI circuits with the 556 timer.
Reposted
November 6, 2025 at 6:34 PM
Reposted
The most popular piece of hardware for the Apple II was made by Microsoft. And it was a Z80.
devblogs.microsoft.com/oldnewthing/...
devblogs.microsoft.com/oldnewthing/...
The Microsoft SoftCard for the Apple II: Getting two processors to share the same memory - The Old New Thing
Reportedly Microsoft's first hardware product.
devblogs.microsoft.com
November 5, 2025 at 6:44 PM
The most popular piece of hardware for the Apple II was made by Microsoft. And it was a Z80.
devblogs.microsoft.com/oldnewthing/...
devblogs.microsoft.com/oldnewthing/...
Reposted
Another revision of my observations on KIM-1 revisions changes.
The keyboard changed from Rev B to Rev D, requiring new holes in the PCB and so some traces had to move. Note the change in style of the PCB layout, not curved but straighter lines.
The keyboard changed from Rev B to Rev D, requiring new holes in the PCB and so some traces had to move. Note the change in style of the PCB layout, not curved but straighter lines.
November 3, 2025 at 6:30 PM
Another revision of my observations on KIM-1 revisions changes.
The keyboard changed from Rev B to Rev D, requiring new holes in the PCB and so some traces had to move. Note the change in style of the PCB layout, not curved but straighter lines.
The keyboard changed from Rev B to Rev D, requiring new holes in the PCB and so some traces had to move. Note the change in style of the PCB layout, not curved but straighter lines.
A rare opportunity to get a TIM 6530-004 IC.
The RRIOT used in the Synertek Jolt and Super Jolt.
www.ebay.nl/itm/13667445...
The RRIOT used in the Synertek Jolt and Super Jolt.
www.ebay.nl/itm/13667445...
SY6530-004 TIM CHIP , For 1970's Jolt, DATAC 1000, MCS6530 MOS unused USA | eBay
SY6530-004 TIM CHIP , For 1970's Jolt, DATAC 1000, MCS6530 MOS unused USA | Computers/Tablets & Networking, Vintage Computing, Vintage Parts & Accessories | eBay!
www.ebay.nl
October 30, 2025 at 1:12 PM
A rare opportunity to get a TIM 6530-004 IC.
The RRIOT used in the Synertek Jolt and Super Jolt.
www.ebay.nl/itm/13667445...
The RRIOT used in the Synertek Jolt and Super Jolt.
www.ebay.nl/itm/13667445...
Reposted
Wee bit more reliable than the KIM-1 I have.
October 29, 2025 at 5:44 PM
Wee bit more reliable than the KIM-1 I have.
Reposted
I don't like being called a hypocrite, so if I'm going to create a site to talk about the 6502, the site better sure also be running on at least a virtual 6502. Say Hello to Web6502! A web framework for the secret 6502 fan in all of us. web6502.puter.site
Web6502 Blog and Demo Website
web6502.puter.site
October 22, 2025 at 2:28 AM
I don't like being called a hypocrite, so if I'm going to create a site to talk about the 6502, the site better sure also be running on at least a virtual 6502. Say Hello to Web6502! A web framework for the secret 6502 fan in all of us. web6502.puter.site
Having a severe cold, so no soldering or programming, but time to do some KIM-1 document upgrades to First Book of KIM, KIM Hints and the Circuit Diagram poster. Higher quality. more versions.
retro.hansotten.nl/circuit-diag...
retro.hansotten.nl/circuit-diag...
Circuit Diagram Poster, KIM Hints, First Book of KIM – Retro Computing
retro.hansotten.nl
October 23, 2025 at 2:10 PM
Having a severe cold, so no soldering or programming, but time to do some KIM-1 document upgrades to First Book of KIM, KIM Hints and the Circuit Diagram poster. Higher quality. more versions.
retro.hansotten.nl/circuit-diag...
retro.hansotten.nl/circuit-diag...
First KIM-1 50 years! Now I am building a KIM-1 myself! Rev E reference, the BOM is excellent!
I am not aiming for an exact replica, I want to test things with it, so IC sockets.
PCB KIM-1 Rev D and BOM by Eduardo Casino github.com/eduardocasin...
Parts mostly from Mouser, and from my old stock.
I am not aiming for an exact replica, I want to test things with it, so IC sockets.
PCB KIM-1 Rev D and BOM by Eduardo Casino github.com/eduardocasin...
Parts mostly from Mouser, and from my old stock.
October 22, 2025 at 4:57 PM
First KIM-1 50 years! Now I am building a KIM-1 myself! Rev E reference, the BOM is excellent!
I am not aiming for an exact replica, I want to test things with it, so IC sockets.
PCB KIM-1 Rev D and BOM by Eduardo Casino github.com/eduardocasin...
Parts mostly from Mouser, and from my old stock.
I am not aiming for an exact replica, I want to test things with it, so IC sockets.
PCB KIM-1 Rev D and BOM by Eduardo Casino github.com/eduardocasin...
Parts mostly from Mouser, and from my old stock.
KIM or KIM-1?
retro.hansotten.nl/kim-tim-kim-...
retro.hansotten.nl/kim-tim-kim-...
October 21, 2025 at 8:45 AM
KIM or KIM-1?
retro.hansotten.nl/kim-tim-kim-...
retro.hansotten.nl/kim-tim-kim-...
Reposted
The 2K Symbolic Assembler, by Robert Denison, assembler and editor in 2K!
This small program allows to assemble a program up to 1K
From Jeff Tranter available source and binary format KIM-1, SYM-1 ,Apple 1.
I made a higher quality scan of the book
retro.hansotten.nl/6502-sbc/kim...
This small program allows to assemble a program up to 1K
From Jeff Tranter available source and binary format KIM-1, SYM-1 ,Apple 1.
I made a higher quality scan of the book
retro.hansotten.nl/6502-sbc/kim...
October 17, 2025 at 9:36 AM
The 2K Symbolic Assembler, by Robert Denison, assembler and editor in 2K!
This small program allows to assemble a program up to 1K
From Jeff Tranter available source and binary format KIM-1, SYM-1 ,Apple 1.
I made a higher quality scan of the book
retro.hansotten.nl/6502-sbc/kim...
This small program allows to assemble a program up to 1K
From Jeff Tranter available source and binary format KIM-1, SYM-1 ,Apple 1.
I made a higher quality scan of the book
retro.hansotten.nl/6502-sbc/kim...
A dead KIM-1? Fix it!
In October 2025 I have revised the page about the KIM-1 diagnostic board with sources of the tests in MOS Technology standard assembler syntax . The EPROM can now be build and modified with modern tools.
retro.hansotten.nl/6502-sbc/kim...
In October 2025 I have revised the page about the KIM-1 diagnostic board with sources of the tests in MOS Technology standard assembler syntax . The EPROM can now be build and modified with modern tools.
retro.hansotten.nl/6502-sbc/kim...
October 14, 2025 at 8:38 AM
A dead KIM-1? Fix it!
In October 2025 I have revised the page about the KIM-1 diagnostic board with sources of the tests in MOS Technology standard assembler syntax . The EPROM can now be build and modified with modern tools.
retro.hansotten.nl/6502-sbc/kim...
In October 2025 I have revised the page about the KIM-1 diagnostic board with sources of the tests in MOS Technology standard assembler syntax . The EPROM can now be build and modified with modern tools.
retro.hansotten.nl/6502-sbc/kim...
Qualcomm acquires Arduino company, that will be the end of the open source open hardware that defined the makers revolution.
October 8, 2025 at 7:25 AM
Qualcomm acquires Arduino company, that will be the end of the open source open hardware that defined the makers revolution.
October 7, 2025 at 9:19 AM
KIM-1, were IC sockets used?
Before I saw the last revision, Rev G, I had never seen an original KIM-1 with IC sockets. All ICs were soldered right into the PCB.
Now I have a KIM-1 Rev G an photo of Dick Dral with white IC sockets.
So the last iteration of the KIM-1 did have IC sockets.
Before I saw the last revision, Rev G, I had never seen an original KIM-1 with IC sockets. All ICs were soldered right into the PCB.
Now I have a KIM-1 Rev G an photo of Dick Dral with white IC sockets.
So the last iteration of the KIM-1 did have IC sockets.
October 6, 2025 at 10:14 AM
KIM-1, were IC sockets used?
Before I saw the last revision, Rev G, I had never seen an original KIM-1 with IC sockets. All ICs were soldered right into the PCB.
Now I have a KIM-1 Rev G an photo of Dick Dral with white IC sockets.
So the last iteration of the KIM-1 did have IC sockets.
Before I saw the last revision, Rev G, I had never seen an original KIM-1 with IC sockets. All ICs were soldered right into the PCB.
Now I have a KIM-1 Rev G an photo of Dick Dral with white IC sockets.
So the last iteration of the KIM-1 did have IC sockets.
Reposted
It's alive! Keypad/Display #PCB module for my #kim-1 replica is working! Mostly based on the original 1970s #schematic, using modern parts. I wrote a PCB test fixture using Arduino and #rp2040 #raspberrypipico module from #adafruit. My first time using a rp2040 was mostly painless. #65C02
August 28, 2025 at 9:20 PM
It's alive! Keypad/Display #PCB module for my #kim-1 replica is working! Mostly based on the original 1970s #schematic, using modern parts. I wrote a PCB test fixture using Arduino and #rp2040 #raspberrypipico module from #adafruit. My first time using a rp2040 was mostly painless. #65C02
Reposted
Yay! The main #PCB for my MOS #KIM-1 replica arrived today from #JLCPCB! The sub-boards seem to fit. Bringup will take awhile since there's a gross chip-pin-numbering error on one of the smaller boards and I'll have to re-fab it. But I'll be able to partially assemble it and test a few things.
September 16, 2025 at 7:51 PM
New KIM-1 (for me, it is from 1976), a Rev B
Nice addition to the first edition and the Rev A.
Nice addition to the first edition and the Rev A.
September 29, 2025 at 5:21 PM
New KIM-1 (for me, it is from 1976), a Rev B
Nice addition to the first edition and the Rev A.
Nice addition to the first edition and the Rev A.