6502 Assembly

since 1975 (earliest usage recorded on this site was 1976)

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Technology Timeline Graph

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

mnulli

AndyC

njr

yacitus

empty

vangale

dabeaz

gnat

kan

lawley

jancona

jtauber

jorjun

growe

r1chardj0n3s

David

greyfade

abtin

edd

tlesher

Rich_Herds_Cats

zephyrfalcon

otherchirps

spookylukey

vvarp

boutell

rogerclark

natevw

adamv

mnulli - 25 years

AndyC - 7 years

njr - 8 years

yacitus - 6 years

empty - 6 years

vangale - 1 years

dabeaz - 6 years

gnat - 4 years

kan - 2 years

lawley - 32 years

jancona - 3 years

jtauber - 30 years

jorjun - 2 years

growe - 30 years

r1chardj0n3s - 4 years

David - 29 years

greyfade - 4 years

abtin - 1 years

af - 2 years

edd - 26 years

tlesher - 3 years

Rich_Herds_Cats - 7 years

zephyrfalcon - 24 years

otherchirps - 2 years

spookylukey - 24 years

vvarp - 6 years

boutell - 14 years

rogerclark - 15 years

natevw - 1 years

adamv - 1 years

mnulli

1976–2000

Not sure 2000 will stay my end year :-) I've lost track of how many variants of 6502 assembly I've used, E.G. the very simple one that was part of the Rockwell System 65, the FORTH assembler that was part of my first FORTH re-target, A bunch of macros from MACRO-11, and finally a set of macros on top of that to provide a "HLL65", akin to Wirth's PL360.

AndyC

1979–1985

Started on the UK-101 ended on the BBC Micro. UK-101 info page: http://www.gifford.co.uk/~coredump/uk101.htm

njr

1979–1986

I have probably spent more time writing 6502 code than anything else; which is a bit depressing given how painful it was. I used it because it was the CPU in my BBC Micro (Model B, 32K RAM!) and wrote a number of commercial packages for AUCBE, the Advisory Centre for Computer-Based Education in Hertfordshire, including Quest (a database) and Alpha, a word processor / macro editor.

empty

1980–1985

Started with this processor with the Vic-20. Continued with it on the Apple ][e. Great processor.

yacitus

1980–1985

I first started playing with 6502 assembly on the Commodore PETs as I deciphered the PEEKs & POKEs in programs I typed into them from various books and magazines. (There was one programmer who wrote the majority of the programs I found interesting and elegant, but I'm ashamed I can't remember—or find—his name.) I started "real" 6502 programming on the Atari 800 my dad bought me when I was (I think) 15. (And I even had a summer job after my first year of university (1983) mainly writing assembly on an Atari 800. I also had a job perhaps that same summer writing some assembly on a Commodore 64.) I may have written the last of my 6502 assembly the next year for a summer job in Toronto, writing software to teach BASIC programming.

vangale

1980

Tried to use this to write a lisp interpreter on my Apple ][ based on descriptions in Winston's "Artificial Intelligence". Not knowing lisp was a major roadblock and, suprisingly, the project was an utter failure.

dabeaz

1981–1986

Initially wrote short assembly functions on an Ohio Scientific Superboard II. Later moved to writing assembly language on the Apple 2 for games. Later implemented a 3D graphics/plotting library for the Apple 2 in about 5000 lines of assembly.

gnat

1982–1985

Learned on the C=64. Still remember that $A9 was LDA in 6502 machine code, which is a startlingly useless fact that I'll take to my grave. Never managed to get an assembler working on the C64, so I assembled all my programs by hand on graph paper. I appreciate my tools now.

jancona

1982–1984

Wrote a device driver so my VIC-20 could print to an IBM electronic typewriter.

kan

1982–1983

lawley

1982–

jtauber

1984–

Learnt this on the Apple ][

jorjun

1984–1985

Learned this on the BBC Micro, wrote a disassembler so I could try and understand how RocketRaid worked :p

growe

1984–

Wrote a few simple 6502 programs for my old Commodore 64, mainly as an exercise to see how it worked.

r1chardj0n3s

1984–1987

My first assembler; also my first ever "scrolling text demo" (text scrolled across a screen using left shift opcode).

David

1985–

greyfade

1986–1989

After seeing several programs that put a bunch of DATA statements at the bottom of the LIST and GOTO'd them, I decided to learn what that was about. Discovered that my Epyx FastLoad cartridge had a debugging assembler, so I started following the examples in my programmer's reference.

1987–1988

abtin

1987

edd

1988–

tlesher

1988–1990

After seeing one too many commercial games that appeared to consist of one line of BASIC (10 SYS 49152, of course), I started learning 6502 assembly language. I used an APPLE II programmer's guide and list of system routine addresses hand-copied from a friend's C64 Programmer's Reference to hand-code machine language. When I got to college and learned what an "assembler" was, I wept for the midnight hours I lost recalculating relative BNE/BEQ addresses after inserting instructions.

Rich_Herds_Cats

1989–1995

BBC B, and embedded systems. This was how we were taught to program properly at High School. Having to enter entire programs using a single digit, seven segment display teaches you to think about what you are doing.

1990–1991

1990–

1990–

1994–1999

Atari 8bit demoscene FTW

boutell

1995–2008

I came to this very late, wanting to write a retro Atari 2600 game (technically the 6507, but it's the same instruction set, minus useful interrupts and with harsh memory limits). I built an Atari emulator in 1995 and discarded it because it seemed implausible that it would ever be fast enough; whoops, Moore's law wasn't dead yet. In the early aughts I put in some time toward a couple of games and made some functioning demos, but never muscled through to produce a cartridge game. Meanwhile the fad has (again) passed. Probably time to face up to it and sell my Starpath Supercharger.

rogerclark

1999–

natevw

2002

Dabbled in this a bit by poking raw opcodes from BASIC, but didn't get much working.

2009

A little.

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