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OSI 300 page update

Found some photos of OSI 300 trainers, some youtube videos, circuit diagram and component layout.

See the OSI 300 page!

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MOS KIM-1 Reproduction

Dave Williams designed, builds and sells on ebay MOS KIM-1 Reproduction boards. A real KIM-1 clone!

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MOS KIM-1 Reproduction

Dave Williams designed, build and sold MOS KIM-1 Reproduction boards. A real KIM-1 clone! The goal was to reproduce a KIM-1 as exact as possible.
So the MOS KIM-1 Reproduction board has the same dimensions, same connectors and as much as possible the same components, including the audio cassette interface, 1K RAM with 8 2102 SAM ICs. The keyboard is reproduced with the same layout and looks quite identical. Components types are chosen close the the originals (though the KIM-1s went to many revisions with varying looking components) and placed on the same location.
The CPU is of course a 6502 at 1 MHz crystal clock frequency. The edge (Application and expansion) connectors are physically and logical identical.

Since 6530 RRIOT ICs (the 002 and 003 variant) are not available anymore, the same solution as in the other clones is chosen: a 6532 RIOT with a 2K EEPROM and some logic ICs (3) to get a hardware solution that makes it look exactly the same for the KIM-1 ROM software. The PCB is a new design, not the typical 70ties KIM-1 design.

The result is great: it feels, looks and operates as an original KIM-1. First Book of LIM programs run, Even Microsoft KIM-1 Basic and Microchess run, when additional RAM is connected.

Documents (thanks to Dave Williams!)

MOS KIM-1 Reproduction Board Layout
MOS KIM-1 Reproduction Schematic
MOS KIM-1 Reproduction BOM

I added the Corsham Technologies KIM-1 60K RAM/ROM board and the KIM I/O board, which makes it a great system!

With the MOS KIM-1 Reproduction comes a small edge connector PCB for audio and power connections. Alas no TTY connections and keyboard/TTY switch. On an USB stick the well known KIM-1 documentation (all also found on this site!) and the First Book of KIM programs, as typed in by Jeff Tranter in papertape format, also found here. But as extra the programs as KIM-1 audio files are provided, as WAV files, ready to load into the KIM-1.

MOS KIM-1 Reproduction

Original KIM-1 rev F

MOS KIM-1 Reproduction

Original KIM-1 rev F

Some photos from Dave Williams, showing the KIM-1 Reproduction connected to an audio cassette recorder, a KIM-1 S-100 Motherboard with a RAM card, running Microsoft Basic KB9 and a production line of KIM-1 Reproduction (with a real KIM-1 in the top row!)

My MOS KIM-1 Reproduction will be connected to Corsham Technologies cards: SRAM and EEPROM and I/O card


Corsham Technologies KIM-1 RAM/ROM and I/O board connected to a KIM-1

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Convert hex formats V2

A program to convert between hex or binary files for 8 bit systems with a 64K address space.
V2 adds the Wozmon Apple 1 format and allow multipart Intel Hex, MOS Papertape and Motorola S records.

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New IC photo’s

New ICs bought recently:
6501AQ, W65C22S, W65C22N in the 65XX IC collection.

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Programming a Microcomputer 6502

Programming a Microcomputer 6502, by Caxton C. Forster, scanned and added to the KIM-1 Articles and Books page for download.

Enjoy!

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KIM-1 Pascal-M compiler

Finally the KIM-1 Pascal-M compiler is available.

After years of (I admit, intermittent) restauration work from paper, the whole package is available again to load on the KIM-1, now including a cross compiler.

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KIM-1 Userguide

Added the ‘user guide’ chapters from the book ‘Microcomputer Principles Featuring the 6502/KIM-1′ as KIM-1 User guide.

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MDT 650

The KIM-1 is the best known development system by MOS Technology.

But a more advanced, more expensive ($3950) system, quite rare now, is the MDT 650.

Here I present you the MOS Technology brochure, an article in the Microcomputer Digest and a userguide as published in the book Microcomputer Systems Principles featuring the 6502 KIM.

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MDT 650 MOS Technology

The KIM-1 is the best known development system by MOS Technology.

But a more advanced, more expensive ($3950) system, quite rare now, is the MDT 650.

Here I present you the MOS Technology brochure, an article in the Microcomputer Digest and a userguide as published in the book Microcomputer Systems Principles featuring the 6502 KIM.

Software for the MDT 6502 was developed by Computer Applications Corporation, COMPAS.

User guide and brochure MDT 650 MOS Technology