Author Archives: hanso

Replica of the MTU K‑1002 audio card and software by Eduardo Casino

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A faithful replica of the K‑1002 8‑bit audio Digital‑to‑Analog Converter card and software for the KIM‑1, SYM‑1, and AIM‑65 computers, originally designed by MTU in the late ’70s.
All details, hardware and software, are available from this repository.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

KIM UNO page updated

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The KIM UNO, the little cheap KIM-1 hardware emulator needed some information added. Photos, links, text.

Like the recently acquired KIM UNO from retro4004bits, alternative firmware by Willem Aandewiel for better LED display and Keypad control.

Read it here.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

Transform a Commodore 1541 into a KIM-1

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By replacing the ROM(s) of a Commodore 1541 disk drive it can be made in a KIM-1.

Well, it runs the KIM-1 ROM modified to use the 6522 driving the IEC bus as TTY serial input/output.
The ROM is also moved to E000 for obvious reasons (the 1541 is unchanged!).

Only serial TTY, no LED, no keypad (code removed), no application or expansion connector.
Tiny basic in the other 1541 ROM socket also runs.

But it behaves like a KIM-1, as Dave McMurtrie shows in the video!

This is a first step to a KIM-1 with a 6522 instead of the 6530 or 6532.

Code here in Dave’s github.


(drawing by netzherpes)

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

RIOT 6530-005 mystery solved!

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The MCS6530-005 was known to me only by some lines in MOS pricelist and a remark in an OSI appnote as a 6530 without ROM.
It is therefore no RRIOT but a RIOT (RAM I/O Timer).
I have acquired several MCS6530-005 ICs and tested with the Backbit Pro Chiptester V2 and indeed it passes all tests of the 6530 except the ROM test.

Today I received a scan of a MOS Technology sheet with the chip equations of the MCS6530-044 and MCS6530-005 (thanks Scott Barnes!).
No CS1 and CS2, just I/O PB5 and PB6.

Now the mystery of the-005 is solved! See all 6530 information here.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

KIM-1 Simulator can now be used with serial terminals

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And now the KIM-1 Simulator can also use a serial terminal, external or a terminal emulator such as Teraterm, Minicon, Putty etc on the same PC with a null modem eliminator.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

Jolt/SuperJolt/TIM Simulator now has serial input/output

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The TIM Simulator comes with a ‘console’, a glass teletype 24×80 screen. It has a subset of ANSI/VT100 support.Jolt/SuperJolt/TIM Simulator now has serial input/output!

Of course there are much better terminal emulators, like Teraterm, Putty, Coolterm, Minicom etcetera.
And a real VT100 type device is really fun! Or a real Teletype …

A local terminal emulator on the same PC can also be used, with a virtual null modem like, com0com on Windows, socat on Linux



Windows with com0com and teraterm

Raspberry Pi with Coolterm

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

Jolt pages extended

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The Jolt by Micro Associates, Inc, is one of the first 6502 systems. A small SBC with a 6502, 6821 PIA and the RRIOT 6530-004 also known as TIM. 512 byte RAM, a serial Teletype and RS-232 interface. The DEMON software (also known as TIM) is the 1K operating system.
Expansion cards were available, such a 2x PIA card, 2K EPROM card with 1702, Power Supply and a 4K RAM card with 2111 SRAM ICs.

As application software Tiny basic and the Resident Assembler Program RAP are available.

More about the Jolt, Micro associates and Superjolt at the Jolt and Superjolt pages

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

AIM 65 other hardware page added

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For the AIM 65 it was not only Rockwell that produced hardware like video,serial and FDC cards, others also amde hardware for the AIM 65.

I have a page devoted to AIM 65 hardware with new photos, updated and cleaned up documents:

– Comelta S.A. Spain RAM and ROM cards
– Cubit
– Rhines and CRT2 Video
– MTU Micro Technology Unlimited expansions for the AIM 65

And some modern expansions:
SM Baker remakes of video and FDC and bus cards.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

KIM-1 Marquee

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This has been waiting some time to be published.

Udo Juerss wrote in 2024 a program KIM-1 Marquee to display running text wit a near complete alphabet on a KIM-1 or clone LED display.

Here the source and binaries.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...

Jolt replica by Scott LaBombard

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Scott LaBombard started many years ago on a replica of the Jolt. Quite a challenge, since only photos are known.

He succeeded in finishing a working replica as shown on this page.

See also:

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...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...