User:Mahjongg

I am an electronic engineer, (of Dutch descend) specialized in designing PCB's for Analog, Digital and to a lesser degree RF systems. In the past I have designed (among many other things) Computers and computer subsystems, modems and audio recording equipment, satellite subsystems and cryogenic electronics. 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, but never got finished because I bought a KIM-1 and later a LMW-80.

I worked for a small hobby computer company, and 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. Many of them I assembled for customers who wanted them assembled. For owners of ZX80's I would buit in ZX81 ROM's. I also built 48K RAM and our own Floppy disc controller and Centronics printer interface into TRS-80 base systems, which was much cheaper than buying an expansion interface. Later I designed and sold my own Z80 computer, a much improved Tandy TRS-80 model 1 clone that also ran CP/M perfectly.

I have been collecting old home computers since forever (actually the start was the three versions of the Aster CT-80 I ended up with after Aster went bankrupt), and I got many from the about ten years I worked for a charity thrift store. but even before that I had many systems. I was always on the lookout for a safe place to give them to for eternity. As in April 2, 2015 (on good friday) I have all my stuff away to "awesomeretro" ( http://awesomeretro.nl).

here is a list of what I donated on permanent loan:

Atari 800 XL, zonder kabels Philips MSX NMS 8245 Tokio color 4 pong, in doos atari 2600jr in doos Acorn electron met expansie MSX VG 8020 Atari 600XL (met 600 naar 800omgecat) BBC micro MSX Sv1 - spectravidea Dragon 32 Snes met kabels enzo Supervision + crystball 2600 6sw gamegear sega audiosonic pong clone (needs tlc) intellivision, compleet sinclair zx spectrum+ 128k schach-computer coogarboy in doos + streetrider + magic tower + arctic zone sega megadrive sega megadrive2 supervision in doos intellivision in doos + burger time + astrosmash + tennis + space hawk + space battle + soccer + astrosmash (doosje met boekjes) vic-20 met 16k ram cartridge commodore 16 (missing 8 key) commodore amiga 1200 sharp mz-800 met tape drive sega megadrive 2 in doos philips videopac g7000 compleet bit90 (laser2000 clone) zx spectrum+ in doos coleco vision met voeding radioshack trs 80 MB comp IV apple IIc atari 260st sharp mz-700 c16 met game controller adapter vic-20 missing 1 key vic-20 missing 2 key met "voeding" commodore 116 commodore plus/4 zx spectrum in dekatronix kast (rom wonder van resoft) newbrain (spectrum met ram expansion en rom switcher) svi msx compleet in tasje acorn electron sanyo msx mpc100 nintendo 64 met wat kabelwerk philips msx nms8245 (missing keys) philips msx vg8235 (met zonder missing keys) super nintendo met copyfloppy interface en cd aansluiting en kabels en controllers (1 fake, 1 real thang) laser 500 color computer toshiba t1000 sony hitbit msx2 mattel aquarius in doos met mini expander in doos laser 500 in koffer, met scheidegger institute cursus ti 99a acorn atom bbc micro enterprise 64 in doos bbc micro (acorn) vigler comx pc1 sinclair zx80 zx spectrum+ met interface module cpc 64-4 met floppy sinclair ql in doos sinclair ql in doos met handvat videomaster enterprise in doos odyssey 2001 svi 728 msx sharp mz-80a met monitor ingebouwd amiga 500 in doos commodore 610 exidy sorcerer compleet in blingbling koffer philips p2000 compleet in doos, familiegeheugen, basic interpreter 16k, boekje atari portfolio atari mega ste met keyboard en monitor lobo max-80 laser 3000 zx spectrum compleet met microdrive en interface one zx-81 met 16kb expansion pack zx spectrum interface 1 zx spectrum radofin telesports audiosonic pp920 megadrive2 + voeding + controllers

accesories: sega rf adapter cdi 450 voeding 2 scart blokjes 5pind naar tulp/jack dreamcast vga adapter nep cd32 controller qtec 5.25 floppy drive (amiga?) controller voor g9000 msx midi module msx viditel modem msx parallel interface msx livetek eraser game controller (joystick) vic-20 16k ram cartridge stofkap amiga 1200 grote atari adapter duo floppy voor atari st msx floppy disk drive 5.25" sony msx floppy disk drive 5.25" zx spectrum joystick adapter 2x dreamcast doos 2 sega megadrive controllers voeding sega megadrive rf kabel trs-80 color joystick in doos dragon32 voeding dragon32 tape kabel yamaha keytar (shs 10) gamecube doos n64 controller groen n64 pokemon stadium commodore 1532 datasette commodore datasette voor de pet schneider ctm 640 monitor pace micro floppy disk 5.25 (40/80 track) dreamcast memory unit doosje nintendo expansion pack n64 king kong n64 rf modulator nes controller nes voeding tv encoder voor een texas home computer 2maal quickshot trs-80 voeding sinclair voeding een atari voeding ti voeding externe hd amiga atari sh204 hd trs-80 monitor trs-80 keyboard

monitors: philips cm8833 ankona kg733 philips computer monitor 80 atari sm125 apple IIc monitor

books: diverse manuals cd-i een introductie doom

Games / software: megadrive jungle book megadrive sonic compilation megadrive fantastic dizzy megadrive wolrdcup italia'90 megadrive sonic2 megadrive mortal kombat mouse trap colecovision quake3 test Sega pac-mania game Videopac 18, 1, 38, MT-Base, MSX databasesysteem Manic minder zonder casette FInders keeprs, MSX tape Sharp basic MZ700 Lazer war zx spectrum Sharp MZ het bolwerk Sharp mz 800,27 Sharp MZ uniggb drie domino MZ system program manual pijama rama zx spectrum video edidtor voor mz 800 pascal voor sharp roland on the ropes game sharp basic s basic compiler c16 spellen cassette verzameling micro mouse, ghost debugging voor spectrum cyber rats basic introductie cursus C16 acorn Haushaltbudget acorn peeko computer Venture colecovision Submarine commander voor Vic20 Zelda 2 adventure of link - NES legend of zelda NES Super mario 2, NES EProm pac voor exidy sourcerer roadblasters voor lynx 2600 combat donkey kong Coleco vision cosmic avenger 2600 missile command 2600 Cosmic crusher voor vic 20 Space invaders 2600 Pac man 2600 S-ram pac atrac casette...voor exidy legend of zelda NES C language Vic 20 8 k ram Vic star battle Vic supervision crystball supervision soccer champion supervision crystball supervision dancing block supervision soccer champion suppervision tennis pro 92 2600 ET frogger colecovision 32 in 1 2600 jungle kong lcd dingetje pokemon pinball voor gameboy (extended) atari 600SE game super mario N64 maraio brothers atari XE columns gamegear asteroids 2600 adventure 2600 super mario world argo fake nintendo 64 compleet ending man met handleiding (licht beschadigd) megaduck megaduck magic tower megaduck black forest tale megaduck warm visitor megaduck railway megaduck the brick wall megaduck 4-in-1 gamegear choplifter III megaduck streetrider gameboy tazmania gameboy rayman msx mt-base cartridge 2600 circus atari coleco vision space panic cvs zaxxon n64 pokemon snap zx spectrum horizons n64 super mario world n64 quake n64 zelda nepconsole 250-in-1 nepconsole nyankies nepconsole 12-in-1 nepconsole 42-in-1 colecovision looping super nintendo paper boy 2 in doos nes mario woods in doos gamegear sonic 2 megaduck grand prix msx mt-debug megaduck carrier colecovision gorf megaduck 2-in-1 megaduck honeybee spectrum hurg nes faxanadu (in doos) msx flight simulator with torpedo attack msx hunchback braindamage 2 keer mz canyon goldrush msx 6-in-1 msx sorcery doosje met 15 tapes (brownbag) vic-20 raid on fort knox amiga amos the creator (alleen doosje) coleco ladybug coleco space panic coleco donkey kong jr coleco turbo coleco microfun coleco donkey kong dragon32 dataplan dragon32 berzerk dragon32 schaken dragon32 textstar dragon32 golf dragon32 astro blast dragon32 ghost attack super nintendo street fighter II msx manic miner cpc oh mummy cpc easi amsword cpc sultan's mate cpc bridge-it cpc timeman one cpc ghostbusters / music composer cpc hangman cpc galactic plague cpc various cpc fruit machine cpc animal vegetable mineral cpc 464 os & firmware cpc roland in the caves cpc harrier attack cpc floppy-achtig ding color 12-in-1 doosje n64 v-rally edition 99 megadrive smurfen megadrive earth defense megadrive sonic spinball megadrive mickey mania megadrive sonic I megadrive sonic II megadrive shadow dancer4 videopac 27 videopac 43 videopac 26 videopac 19 videopac 1 videopac 38 videopac 24 doos met bbc micro games sharp applications tape sega megadrive kick-off 3 svi-727 video uitbreiding voor msx