Many happy hours spent with Zilog Z80 Machine Code;
A wonderful assembly language, so easy to understand.
I still have my very thick! Z80 instruction manual for reference even now when programming my "Speccy" in BASIC and Machine Code language, using both my Hardware Spectrums and also my Software one...."Spectaculator"...>>>
http://www.spectaculator.com/I still have mountains of various 8-bit computers and all their hardware, and crates of various software on cassette tapes and floppy disks!...AND Microdrives!
All in full working order, and constantly reminding me of happy times spent with all my mates, programming our 48K Speccies, Commodore C64's, Amstrad CPC 464's, etc, in our bedrooms in the 1980's, and showing off our Demo's!
Piles of 8-bit programming manuals.
Really happy times!
A lost art nowadays, with complex 32-bit and 64-bit processors!
Zilog Z80..the King is dead...Long live the King!...>>>
http://en.wikipedia.org/wiki/Zilog_Z80Paul....Loading the Accumulator with a Number!...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.