x86 prefixes and escape opcodes flowchart

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Toolbox

#opcodes #mos6510

a9 lda#
ad lda$4
bd lda$4,x
b9 lda$4,y
a5 lda$2
b1 lda($2),y

8d sta$4
9d sta$4,x
99 sta$4,y
85 sta$2
91 sta($2),y

a2 ldx#
a0 ldy#
ae ldx$4
ac ldy$4
a6 ldx$2
a4 ldy$2

8e stx$4
8c sty$4
86 stx$2
84 sty$2

aa tax
8a txa
a8 tay
98 tya

29 and#
09 ora#

ee inc$4
e6 inc$2
e8 inx
c8 iny

ce dec$4
c6 dec$2
ca dex
88 dey

0a asl
2a rol

c9 cmp#

4c jmp
20 jsr
60 rts

f0 beq
d0 bne

78 sei
58 cli
18 clc

ea nop

Oh, look, someone decided to alphabetize their grocery list of #x86 #opcodes and call it a "guide" 😆. If you ever wanted to read a text file that feels like a random keyboard smash but with more #acronyms, this is your article! 🖥️🔍
https://www.sandpile.org/x86/opc_1.htm #grocerylist #guide #techhumor #randomkeyboardsmash #HackerNews #ngated
sandpile.org -- x86 architecture -- 1 byte opcodes

sandpile.org -- x86 architecture -- 1 byte opcodes

Oh look, #Siemens decided to publish an assembly manual that proudly parades illegal 6502 #opcodes like they're the next fashion trend of 1980 🤦‍♂️. While home computer nerds drooled over these forbidden instructions, Siemens threw them into a manual like it was no big deal. Who knew breaking the rules could be so educational? 📚💥
https://www.pagetable.com/?p=1798 #assemblymanual #techhistory #nerdculture #educational #1980s #HackerNews #ngated
6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980) – pagetable.com

6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980) – pagetable.com

6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980)

https://www.pagetable.com/?p=1798

#HackerNews #6502 #Illegal #Opcodes #SiemensPC100 #AssemblyManual #RetroComputing #VintageTech

6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980) – pagetable.com

Ah yes, the "illegal" opcodes—those mischievous little gremlins of the 6502 that do "useful" things by accident. 🤔 #Michael #Steil daringly dives into this chaos like it's the eighth wonder of the world, but spoiler alert: it's just #undocumented #spaghetti #code worship. 🍝✨
https://www.pagetable.com/?p=39 #illegal #opcodes #code #tech #exploration #HackerNews #ngated
How MOS 6502 Illegal Opcodes really work – pagetable.com

Illegal Opcodes of the MOS 6502: Glitches That Work - The Oasis BBS

An in-depth look at how the MOS 6502's undocumented instructions function, based on Michael Steil’s research. Discover how illegal opcodes work by accident, not by intention.

The Oasis BBS
doodles and program flow control #drek #drekir #thelonghike #scalie #x86 #assembly #opcodes