#6502asm — Public Fediverse posts

@wyatt At least it isn't a Commodore 64, Atari 800, Apple II, or NES, where disabling TSX instructions will make a lot of software not work.

#6502asm #mos6502

@wyatt At least it isn't a Commodore 64, Atari 800, Apple II, or NES, where disabling TSX instructions will make a lot of software not work.

#6502asm #mos6502

@wyatt At least it isn't a Commodore 64, Atari 800, Apple II, or NES, where disabling TSX instructions will make a lot of software not work.

#6502asm #mos6502

@wyatt At least it isn't a Commodore 64, Atari 800, Apple II, or NES, where disabling TSX instructions will make a lot of software not work.

#6502asm #mos6502

@wyatt At least it isn't a Commodore 64, Atari 800, Apple II, or NES, where disabling TSX instructions will make a lot of software not work.

#6502asm #mos6502

This week on the blog: the latest release of my Ophis assembler hit an ugly corner of 6502 assembly language syntax (Z80 has it too, x86 and m68k don't), and that turns out to be a good excuse to drop a couple of thousand words on parsing theory.

Also, the Bison parser generator is cooler than it was the last time I looked at it.

https://bumbershootsoft.wordpress.com/2026/04/04/some-subtleties-when-parsing-6502-assembly-language/

#6502asm #parser #assembly

This week on the blog: the latest release of my Ophis assembler hit an ugly corner of 6502 assembly language syntax (Z80 has it too, x86 and m68k don't), and that turns out to be a good excuse to drop a couple of thousand words on parsing theory.

Also, the Bison parser generator is cooler than it was the last time I looked at it.

https://bumbershootsoft.wordpress.com/2026/04/04/some-subtleties-when-parsing-6502-assembly-language/

#6502asm #parser #assembly

This week on the blog: the latest release of my Ophis assembler hit an ugly corner of 6502 assembly language syntax (Z80 has it too, x86 and m68k don't), and that turns out to be a good excuse to drop a couple of thousand words on parsing theory.

Also, the Bison parser generator is cooler than it was the last time I looked at it.

https://bumbershootsoft.wordpress.com/2026/04/04/some-subtleties-when-parsing-6502-assembly-language/

#6502asm #parser #assembly

This week on the blog: the latest release of my Ophis assembler hit an ugly corner of 6502 assembly language syntax (Z80 has it too, x86 and m68k don't), and that turns out to be a good excuse to drop a couple of thousand words on parsing theory.

Also, the Bison parser generator is cooler than it was the last time I looked at it.

https://bumbershootsoft.wordpress.com/2026/04/04/some-subtleties-when-parsing-6502-assembly-language/

#6502asm #parser #assembly

This week on the blog: the latest release of my Ophis assembler hit an ugly corner of 6502 assembly language syntax (Z80 has it too, x86 and m68k don't), and that turns out to be a good excuse to drop a couple of thousand words on parsing theory.

Also, the Bison parser generator is cooler than it was the last time I looked at it.

https://bumbershootsoft.wordpress.com/2026/04/04/some-subtleties-when-parsing-6502-assembly-language/

#6502asm #parser #assembly

🚶🏻Endless Journey: The Journey to Journeyland Starring Jimmy Journey✨

My entry for Byte Off VI

Theme:"It’s not the destination. It’s the journey."

https://theretroverse.com/product/endless-journey-the-road-to-nowhere-starring-jimmy-journey/

#indienes #gamedev #homebrew #retrogame #retrogaming #nes #nesdev #indieretro #nesmaker #6502asm #byteoffvi #gamejam

🚶🏻Endless Journey: The Journey to Journeyland Starring Jimmy Journey✨

My entry for Byte Off VI

Theme:"It’s not the destination. It’s the journey."

https://theretroverse.com/product/endless-journey-the-road-to-nowhere-starring-jimmy-journey/

#indienes #gamedev #homebrew #retrogame #retrogaming #nes #nesdev #indieretro #nesmaker #6502asm #byteoffvi #gamejam

🚶🏻Endless Journey: The Journey to Journeyland Starring Jimmy Journey✨

My entry for Byte Off VI

Theme:"It’s not the destination. It’s the journey."

https://theretroverse.com/product/endless-journey-the-road-to-nowhere-starring-jimmy-journey/

#indienes #gamedev #homebrew #retrogame #retrogaming #nes #nesdev #indieretro #nesmaker #6502asm #byteoffvi #gamejam

🚶🏻Endless Journey: The Journey to Journeyland Starring Jimmy Journey✨

My entry for Byte Off VI

Theme:"It’s not the destination. It’s the journey."

https://theretroverse.com/product/endless-journey-the-road-to-nowhere-starring-jimmy-journey/

#indienes #gamedev #homebrew #retrogame #retrogaming #nes #nesdev #indieretro #nesmaker #6502asm #byteoffvi #gamejam

🚶🏻Endless Journey: The Journey to Journeyland Starring Jimmy Journey✨

My entry for Byte Off VI

Theme:"It’s not the destination. It’s the journey."

https://theretroverse.com/product/endless-journey-the-road-to-nowhere-starring-jimmy-journey/

#indienes #gamedev #homebrew #retrogame #retrogaming #nes #nesdev #indieretro #nesmaker #6502asm #byteoffvi #gamejam

So I've jumped on the #6502 bandwagon. I've been taking Ben Eater's 6502 setup and put it on a Tang Nano 9K #FPGA.
#mos6502 #6502asm #verilog #hdl

https://github.com/ellisgl/TN9K-BE65C02

So I've jumped on the #6502 bandwagon. I've been taking Ben Eater's 6502 setup and put it on a Tang Nano 9K #FPGA.
#mos6502 #6502asm #verilog #hdl

https://github.com/ellisgl/TN9K-BE65C02

So I've jumped on the #6502 bandwagon. I've been taking Ben Eater's 6502 setup and put it on a Tang Nano 9K #FPGA.
#mos6502 #6502asm #verilog #hdl

https://github.com/ellisgl/TN9K-BE65C02

So I've jumped on the #6502 bandwagon. I've been taking Ben Eater's 6502 setup and put it on a Tang Nano 9K #FPGA.
#mos6502 #6502asm #verilog #hdl

https://github.com/ellisgl/TN9K-BE65C02

So I've jumped on the #6502 bandwagon. I've been taking Ben Eater's 6502 setup and put it on a Tang Nano 9K #FPGA.
#mos6502 #6502asm #verilog #hdl

https://github.com/ellisgl/TN9K-BE65C02

#Bustina carts are back in stock after the first batch sold out almost immediately! Thanks to everyone for your excitement for my game! Ships internationally!

https://retrogametycoon.com/fi/catalogue/bustina-and-the-search-for-booty_1581386/

#indienes #gamedev #homebrew #retrogame #nes #nesdev #indieretro #nesmaker #6502asm

If you love Assembly, I am sure you'll love my #UltimASM #DSL it allows you to design the Assembly of your dreams or to code in #6502asm , #MC6809 , #mc68000 and even #VAX #ASM on #RISC_OS (and all other supported platform by my #UltimaVM).

Want to know more? Come at the RISC OS London Show Saturday 25th October!

#riscos #bytecode #virtualMachine

The first PHYSICAL copies of my game #Bustina are up for sale now! Ships internationally! Big thanks to Rewinded Entertainment for publishing!!

https://retrogametycoon.com/fi/catalogue/bustina-and-the-search-for-booty_1581386/

#indienes #gamedev #homebrew #retrogame #nes #nesdev #indieretro #nesmaker #6502asm

#introduction

Hi, I’m Tim a software developer in the Memphis area.

- In my day job I mainly use #typescript and #java, but play with #golang and #rust
- I’m into #retrocomputing ( #6502asm #ibmpcjr #atari8bit #nesdev )
- #electronics and #diyelectronics is my jam
- Also #aviation #Flying personally for fun

Say hi! or share some other good hashtags in these realms.

Shift the picture to help PacMan.
http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amim55&group
#discoco #wip #6502asm #webdev #education #libre

Display the image.

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amim05

#discoco #wip #6502asm #webdev #education #libre

#discoco #wip #6502asm #webdev #libre #education

[fr] Petit jeu #6502asm avec #discoco :
RETROUVEZ l'image mystère

http://johann.poufpouf.free.fr/discoco/fr/index.html?base64=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

[en] Tiny game #6502asm with #discoco
FIND the mysterious picture

http://johann.poufpouf.free.fr/discoco/en/index.html?base64=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

Pas trop présent sur le Fédiverse en ce moment. J'avance toujours sur mon simulateur de processeur 6502 mais la création de niveau est extrêmement longue...

Voici 2 exemples parmi les premières missions.

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amre05&group

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amme03&group

#discoco #wip #webdev #education #libre #6502asm

Quelques exercices sur les registres du processeur 6502.

http://johann.poufpouf.free.fr/discoco/fr/index.html?menu&id=amre05,amre11,amre12,amre21,amre22,amre23

#discoco #wip #webdev #education #free #6502asm

Une deuxième mission en assembleur 6502. Pas très différente de la première, mais désormais l'aide (le point d'interrogation) est disponible.

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amre02

#discoco #wip #webdev #education #libre #6502asm

Encore énormément de boulot à faire, mais la première mission du simulateur de processeur 6502, en version alpha de chez alpha, est disponible.

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=amre01

Accessoirement, le niveau "bac à sable" est toujours accessible ici (la compilation est OK, mais l'exécution est limitée à 2,3 opérations):

http://johann.poufpouf.free.fr/discoco/fr/index.html?id=am01

#discoco #wip #webdev #education #libre #6502asm

#discoco #wip #webdev #education #6502asm

[fr] Maintenant que l'activité "Picross" est plus ou moins finie, j'attaque la nouvelle activité "asm" où chaque niveau consistera à écrire un programme en assembleur sur un processeur 6502.

[en] "Picross" activity is almost done. Now, let's build a new one called "asm" where the player task is to write programs in a 6502 assembler simulator !

#wip #webdev #discoco #asm #6502asm #education

Randomly generating 30 billion Atari 2600 ROMs, only a handful have structure, with 1 responding to controller input

https://bbenchoff.github.io/pages/FiniteAtari.html

#6502asm #atari2600

Haha I love it :smugcat:

#deathgrips #nolove #nes #nesdev #8bit #famicom #nintendo #gamedev #6502asm #assembly

On it

#nes #nesdev #gamedev #8bit #assembly #coding #6502asm #nintendo

Rest in spaghetti never forgetti :smugcat:

#nes #nesdev #gamedev #coding #assembly #6502asm

Hell yeah

#nes #nesdev #indienes #gamedev #coding #assembly #6502asm

Something absolutely crazy just happened! I wrote a bunch of code (by my standards, which are poor), then compiled it and executed it as I normally do, and it just worked right away.
It's this jump, blessed by Assembly God!

#nes #indienes #nesdev #gamedev #coding #assembly #6502asm #indiedev

He will end you :smugcat:

#nes #nesdev #gamedev #coding #assembly #6502asm #indiedev

Refactored my massive CMP branch sausages using the RTS trick, really neat stuff - https://www.nesdev.org/wiki/RTS_Trick
Scared of indirect jumping because of the weird non-obvious bug that I stumbled upon. Something about the lower byte of an address being stored on the last memory page. So hard to keep such things in mind 🥵

#nesdev #assembly #asm6502 #6502asm #coding

v . v
'

#nes #nesdev #gamedev #aphextwin #8bit #chiptune #coding #assembly #6502asm #indiedev

For Screenshot Saturday, here's a room from #Bustina with zero context. I just really liked how it looked. 😁💀

#screenshotsaturday #indienes #gamedev #homebrew #retrogame #nes #nesdev #indieretro #nesmaker #6502asm

Advanced Art Nouveau!

#6502processor #6502asm

Advanced Art Nouveau!

#6502processor #6502asm

Advanced Art Nouveau!

#6502processor #6502asm

Advanced Art Nouveau!

#6502processor #6502asm

Advanced Art Nouveau!

#6502processor #6502asm

I'm hacking on the good old TEDMON, the #C128 version. I'm porting it to the Foenix #F256Jr, I really need some way to break into the monitor and inspect the program's state on the hardware.

The F256 has a C64 keyboard connector in addition to the PS/2 port, and it should properly generate NMI when /RESTORE is grounded. Should be possible to break into the monitor at any time.

It's fairly interesting to work on this, the disassembly and assembly routines are impressively small, but it's probably going to be less fun to add the #65C02 instructions.

#6502asm #retrocomputing