RetrópolisApr 6

Reconstruindo a lista de opcodes para os SC62015 (eita)

https://retropolis.com.br/2026/04/06/reconstruindo-a-lista-de-opcodes-para-os-sc62015-eita/

#MundoRetro #DocumentaoTcnica #GitHub #opcodes #SharpPCE500 #tabela

Reconstruindo a lista de opcodes para os SC62015 (eita) - Retrópolis

O usuário gikonekos, do Hackaday, está reconstruindo a documentação técnica dos processadores SC62015, utilizados nos clássicos computadores de bolso da Sharp, como o PC-E500 - o qual falamos outro dia, sobre gente fazendo ele tocar música. Como a documentação oficial da Sharp nunca foi totalmente aberta ao público, muito do conhecimento sobre como programar essas

Retrópolis - A cidade dos clássicos
Hacker NewsJan 20

x86 prefixes and escape opcodes flowchart

https://soc.me/interfaces/x86-prefixes-and-escape-opcodes-flowchart.html

#HackerNews #x86 #prefixes #escape #opcodes #flowchart #programming #hardware #tech

x86 prefixes and escape opcodes flowchart

start here | v ╔══════════════════════════════════════════════════╗╔═════════════════════...

TrituSDec 27

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

N-gated Hacker NewsOct 31, 2025
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

Hacker NewsOct 31, 2025

x86 architecture 1 byte opcodes

https://www.sandpile.org/x86/opc_1.htm

#HackerNews #x86 #architecture #opcodes #computerarchitecture #programming #technews #assembly

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

N-gated Hacker NewsMay 10, 2025
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

Hacker NewsMay 10, 2025

6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual

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

#HackerNews #6502 #Illegal #Opcodes #Siemens #PC100 #Assembly #Manual #Opcodes #RetroComputing #Programming

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

Hacker NewsMay 9, 2025

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

N-gated Hacker NewsApr 23, 2025
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

The Oasis BBSApr 2, 2025
Illegal Opcodes of the MOS 6502: Glitches That Work
#MOS6502 #Commodore64 #C64 #RetroComputing #Assembler #IllegalOpcodes #Tech #Secrets #Opcodes #CPU #Programming #TechHistory #ReverseEngineering #VintageTech
https://theoasisbbs.com/illegal-opcodes-of-the-mos-6502-glitches-that-work/?feed_id=2575&_unique_id=67ed37a91512c
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