@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

@yakkoj 6 cycles of graphics then 7 cycles of text which adds up to 13 cycles. 13 cycles displayed 5 times to consume 65 cycles which is the time the Apple II spends on a single horizontal line on the screen -- 40 cycles (40 bytes) of screen memory and 15 cycles of the black "front" and "back" porch.

#6502asm #terminal #AppleII

CALL-1184:CALL-151
300:AD 50 C0 EA AD 51 C0 4C 0 3 N300G

#AppleII #6502asm

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

Some Subtleties When Parsing 6502 Assembly Language

I recently made a new release of my Ophis assembler. I ended that announcement with a note that fixing some internal logic issues was more exciting than I’d bargained for, but I didn’t …

Bumbershoot Software

🚶🏻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

Help Jimmy Journey journey to Journeyland in one of the most rousing journeys you’ve ever dared journey. Destination: Journey! Developer’s Note: Please let me know if the mid boss is too hard. Also, comment below if you’d be interested in me making this available on physical cart so you can continue the journey at home. Submission for Byte-Off VI!  For more fun hit up holmadegames.com🚡

The Retro Verse

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

I am taking a break from the $ and switching to the ¥.

#AppleII #dollar #yen #prompt #terminal #6502asm #apple2

#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

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

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