Mahjongg: Difference between revisions
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
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. Later I designed | 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 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, lately 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. | Through the years, I designed MSX hardware, many-many modems and audio and FAX recorders, to name just a few things, lately 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. | ||
Revision as of 02:17, 16 January 2015
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 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, lately 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.