Retro Computing http://retro.hansotten.nl About small SBC systems Sat, 29 Aug 2026 14:21:31 +0000 en-US hourly 1 http://retro.hansotten.nl/wp-content/uploads/2020/10/cropped-kim1-as-32x32.jpg Retro Computing http://retro.hansotten.nl 32 32 Microprocessor programming and applications for scientists and engineers (Richard R. Smardzewski http://retro.hansotten.nl/microprocessor-programming/ Fri, 28 Aug 2026 17:24:22 +0000 http://retro.hansotten.nl/?p=22118 Book added to the 6502 KIM-1 AIM 65 books pages:

Microprocessor programming and applications
for scientists and engineers (Richard R. Smardzewski

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> Apple 1 Replica TE PAL version http://retro.hansotten.nl/apple-1-replica-te-pal-version/ Fri, 28 Aug 2026 09:47:27 +0000 http://retro.hansotten.nl/?p=22106 User ExPLIT on the German forum Verein zum Erhalt klassischer Computer e.V.
has build an Apple 1 Replica 1 TE from the design files by Vince Briel.

He was not so happy with the NTSC composite signal of this Replica 1. So he reworked the source files of the Propeller to support PAL formatted video.

The thread on the design is here.

EXPLIT created a github archive as a fork of the github from Vince Briel, with original and PAL adapted source files.

More on the Apple 1 Replica’s here.

This is how the PAL output looks: sharp, no artefacts, black on white:

Photos of the build by EXPLIT:


See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> My KIMSI http://retro.hansotten.nl/my-kimsi/ Sun, 23 Aug 2026 15:39:41 +0000 http://retro.hansotten.nl/?p=22089 My KIMSI

I acquired a KIMSI in August 2026. It was build into a plexiglas/aluminium case, with a KIM-1 (Rev G) and a ‘microcalculator board’. I took the system apart, no room to store the big ugly thing.

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> A boxed Synertek VIM-1 http://retro.hansotten.nl/a-boxed-synertek-vim-1/ Sun, 23 Aug 2026 15:03:33 +0000 http://retro.hansotten.nl/?p=22087 A boxed VIM-1 acquired in August 2026. More SYM-1 photos here.


See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> SYM-2 prototype http://retro.hansotten.nl/sym-2-prototype/ Sun, 23 Aug 2026 13:23:07 +0000 http://retro.hansotten.nl/?p=22074 In August 2026 I acquired an boxed engineering SYM-2 prototype. It comes with two large circuit diagrams illustrating the design.


Next photos by Paul Schroeter.




See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> Jolt with 4K images http://retro.hansotten.nl/jolt-with-4k-images/ Fri, 14 Aug 2026 13:19:33 +0000 http://retro.hansotten.nl/?p=22004 With 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

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> KB-9, MOS TECH BASIC for the 6502 http://retro.hansotten.nl/kb-9-mos-tech-basic-for-the-6502/ Sun, 02 Aug 2026 14:30:16 +0000 http://retro.hansotten.nl/?p=21973 With a scan of manuals by Gerben Voort, and a third photo of a cassette with KB-9, time to refresh the KB-9 pages.

Thanks Gerben Voort

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> The KIM-1, TIM and Jolt explained http://retro.hansotten.nl/the-kim-1-tim-and-jolt-explained/ Thu, 30 Jul 2026 17:26:28 +0000 http://retro.hansotten.nl/?p=21910 During the hot summer days, locked up in house because of the heat, I made a deep dive into the KIM-1 and the TIM/Jolt software and hardware.

50 years of working with a KIM-1:
The KIM-1 Explained

The Jolt, one of the first 6502 SBC’s, so nicely reproduced now:
The TIM/Jolt explained.

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> Additions to the EMMA system documentation http://retro.hansotten.nl/additions-to-the-emma-system-documentation/ Tue, 28 Jul 2026 17:21:43 +0000 http://retro.hansotten.nl/?p=21818 Additions to the EMMA system documentation, thanks Keith Norman

Emma Hardware Manual
Eprom Programmer
Mac User Manual

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
]]> Bug in the TTY KIM-1 monitor? http://retro.hansotten.nl/bug-tty/ Thu, 23 Jul 2026 13:36:54 +0000 http://retro.hansotten.nl/?p=21631 The KIM-1 monitor surprises me every time I dive into it.
The KIM-1 Explained is nearing completion. The KIM-1 explained

There is a bug in the TTY CLI, it accepts characters as ‘;’ and ‘:’ as valid hex and translates to A..F. 

KIM
0200 A9 ;;
00BB 00 ::
00AA 00 ????
FFFF 1C

More about this innocent feature here: PRTBYT, GETBYT and PACK

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...
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