Mahjongg: Difference between revisions
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my first computer was a nameless home-brew system based on a 6502, I designed in 1978 but it never got finished because I bought a KIM-1 and later a LMW-80. | my first computer was a nameless home-brew system based on a 6502, I designed in 1978 but it never got finished because I bought a KIM-1 and later a LMW-80. | ||
after my study, I started working for a small hobby computer company, that among many other things sold Apple ]['s, ABC80's and Olivetti M80 systems, but also many kits. Like the Junior Computer (a KIM-1 clone), the Acorn Atom and also ZX80 kits. dozens of those kits I assembled for customers who wanted them assembled. And for owners of ZX80's I would also built in ZX81 ROM's, so they gained the batter basic of the ZX81 (but not "slow" video mode). I also built 48K RAM and our own Floppy disc controller and Centronics printer interface into TRS-80 model I base systems, which was much cheaper in the Netherlands than buying an official expansion interface | after my study, I started working for a small hobby computer company, that among many other things sold Apple ]['s, ABC80's and Olivetti M80 systems, but also many kits. Like the Junior Computer (a KIM-1 clone), the Acorn Atom and also ZX80 kits. dozens of those kits I assembled for customers who wanted them assembled. And for owners of ZX80's I would also built in ZX81 ROM's, so they gained the batter basic of the ZX81 (but not "slow" video mode). I also built 48K RAM and our own Floppy disc controller and Centronics printer interface into TRS-80 model I base systems, which was much cheaper in the Netherlands than buying an official expansion interface. | ||
Through the years, I designed MSX hardware, many-many modems and audio and FAX recorders, to name just a few things, | Later I designed amy own Z80 computer, the Aster CT80, a much improved Tandy TRS-80 model 1 clone that also ran CP/M perfectly, and could be used as a Videotex terminal, about 10.000 of them were sold, mostly to schools. It bore a remarkable visual resemblance to the IBM-PC-XT which came out a few years later. | ||
Through the years, I designed MSX hardware, many-many modems and audio and FAX recorders, to name just a few things, and also worked as a programmer for "Aackosoft", and later programmed an application built into a sony MSX2 computer, the last few years I am learning to layout Integrated Circuits, and am designing and building space related hardware, and other high end electronics for third parties, on-demand Lately I'm programming again in C (for an Arduino MEGA 2560), and in Python 3.5 for a chip tester I designed. | |||
Revision as of 19:45, 20 February 2016
I am Mahjongg (M.C.J. de Jong), an electronic engineer, (of Dutch descend) specialized in designing PCB's for Analog, Digital and to a lesser degree RF systems. I am fond of retro computing, and own a collection of retro computers, and literature about retro computing.
my first computer was a nameless home-brew system based on a 6502, I designed in 1978 but it never got finished because I bought a KIM-1 and later a LMW-80.
after my study, I started working for a small hobby computer company, that among many other things sold Apple ]['s, ABC80's and Olivetti M80 systems, but also many kits. Like the Junior Computer (a KIM-1 clone), the Acorn Atom and also ZX80 kits. dozens of those kits I assembled for customers who wanted them assembled. And for owners of ZX80's I would also built in ZX81 ROM's, so they gained the batter basic of the ZX81 (but not "slow" video mode). I also built 48K RAM and our own Floppy disc controller and Centronics printer interface into TRS-80 model I base systems, which was much cheaper in the Netherlands than buying an official expansion interface.
Later I designed amy own Z80 computer, the Aster CT80, a much improved Tandy TRS-80 model 1 clone that also ran CP/M perfectly, and could be used as a Videotex terminal, about 10.000 of them were sold, mostly to schools. It bore a remarkable visual resemblance to the IBM-PC-XT which came out a few years later.
Through the years, I designed MSX hardware, many-many modems and audio and FAX recorders, to name just a few things, and also worked as a programmer for "Aackosoft", and later programmed an application built into a sony MSX2 computer, the last few years I am learning to layout Integrated Circuits, and am designing and building space related hardware, and other high end electronics for third parties, on-demand Lately I'm programming again in C (for an Arduino MEGA 2560), and in Python 3.5 for a chip tester I designed.