Lmst

Idun-Cartridge Connects C128 to Raspberry Pi
#Commodore128 #C64 #RaspberryPi #RetroComputing #IdunCartridge #8BitComputing #MOS6502 #C64Development #BBS #SIDMusic
https://theoasisbbs.com/idun-cartridge-connects-c128-to-raspberry-pi/?feed_id=3280&_unique_id=68234662b6d62

6502 Illegal Opcodes in the Siemens PC 100 Assembly Manual (1980)
https://www.pagetable.com/?p=1798
#retrocomputing #aim65 #siemens #pc100 #mos6502

#QR_code generation on #ORIC #MOS6502 in just 50 milliseconds (screen drawing included)!😎

Vorbereitung für das #VCFe. Ein paar Give-aways für die Führung in der #datArena. #MOS6502 #vintagecomputing #vclab

A black and white keytag with the inscription "MOS 6502." The surface appears textured, and there is a hole for attachment. The tag is placed on a wooden surface.

München? Wenn dir dieses Schild begegnet, fahr nicht einfach vorbei. Da lang geht´s ins Vintage Computer Paradies! VCFe this weekend!

Also: abbiegen, Vorfahrt gewähren, und dann straight zurück in die Zukunft, äh, Vergangenheit!

#VCFe #vcfe24 #VintageComputerFestival #München #6502Forever #RetroLove #Commodore64 #commodorepet #Amiga #atari800 #apple #FloppyPower #mos6502 #OldButGold #HackThePast #MuseumZumMitnehmen

Straßenschild an einer Autobahnauffahrt mit blauem Hinweisschild „München“, mehreren Verkehrsschildern und klarem Himmel – Wegweiser zum Vintage Computer Festival Europe (VCFe), das an diesem Wochenende in München stattfindet.

Building a Commodore 64 from Scratch: No 6510, VIC-II, or SID
#Commodore64 #RetroComputing #Electronics #HomebrewComputer #C64 #MOS6502 #DIYComputer #EPROM #StaticRAM #SBC
https://theoasisbbs.com/building-a-commodore-64-from-scratch-no-6510-vic-ii-or-sid/?feed_id=3030&_unique_id=680f8105d4f99

Quick reminder that the #retrogamedev IRC channel in Libera is still on: https://www.usebox.net/retrogamedev/

Come and lurk with us! There's also the occasional chat that you may love too; likely will share some of the development of my new MSX2 project.

#amstrad #msx #c64 #zxspectum #gamedev #dos #nes #sms #gb #z80 #MOS6502 #whatever

How MOS 6502 Illegal Opcodes Work – Michael Steil

https://www.pagetable.com/?p=39

#HackerNews #MOS6502 #IllegalOpcodes #MichaelSteil #RetroComputing #Programming #History

Piers made a 6502 to 6504 adapter for the old CBM disk drives. Very neat!

https://youtube.com/watch?v=fkwoDQRJFnA&si=nQ2RwQKieVUzPst5

#retrocomputing #commodore #mos6502

Now #mos6502 seminar with svolli
#Revision2025

Thanks to svolli I now own two fake 65C02 -- which are actually real 6502! Oh how the tables have turned...
#mos6502

Learning Assembly for Fun, Performance and Profit

Author: Babbage
Original: https://thechipletter.substack.com/p/learning-assembly-for-fun-and-profit

#assembler #z80 #68kmla #mos6502 #x86 #arm #riscv

Für alle Retrofans und Liebhaber des Commodore PET (und des 6502): https://www.masswerk.at/pet/
Cooler Emulator und Du kannst nicht nur Programme per Drag & Drop auf den Bildschirm laden, sondern auch einfach Assembler-Quellcode dort ablegen und übersetzen lassen. 😎

#PET #RetroComputing #MOS6502 #Assembler

6502 assembler source code to display the alphabet from A-Z on the screen of the PET2001

@jbqueru @gumnos @mms Well, it has a PC of course, which is technically an "address register" 😏 not a general-purpose one though.

Instructions are simple 8bit values (operation and mode combined to one opcode) and regarding which modes are available for which operation, I'd say you get quickly used to it. It's (partially) related to the purposes of the registers. None is really "general purpose", only A comes close, but yep, it can't do one thing X and Y can do: count.

#mos6502 coders use the "#zeropage" in a way you'd otherwise use additional registers, which makes a lot of sense. The clocks for RAM and CPU are the same, RAM accesses need few clock cycles, and for the zeropage even fewer. There you can have your "address registers", 16 bits stored in little-endian.

Je rattrape (un peu) mon retard dans les montages à assembler avec ces deux "NOP testers" pour #z80 et #mos6502
Et un NOP testeur céquoidon ? C'est un montage qui permet de vérifier qu'un microprocesseur est vivant en présentant la commande NOP sur le bus de données (câblée en dur sur le circuit) et en regardant ce qu'il se passe sur le bus d'adresse : la commande NOP ne faisant rien le processeur passe juste à l'instruction suivante ce qui a pour effet d'incrémenter l'adresse, visualisée ici avec une série de LEDs.
L'horloge est ici un 555 pour que ça aille assez lentement pour y voir quelque chose !
#retrocomputing

Deux petits montages presque identiques, un pour Z80 et un pour 6502, les deux sont alimentés via un câble USB, au centre un support à levier 40 broches et en bas une série de 8 LEDs représentant la moitié du bus d'adresse. Le testeur Z80 est alimenté et quelques LEDs sont allumées.

@EC64 PET meldet sich ♥️
#vintagecomputing #commodore #mos6502 #commodorepet #vcfe

Startbildschirm des Commodore PET mit BASIC-Interpreter und typischem READY prompt

Just received the "W.O.P.R. 64" cartridge for the #C64 expansion port. It features 32 LEDs to indicating signals on the #MOS6502 address and data busses and for 8 control port indicators:

https://www.tindie.com/products/thedarkforest/wopr64-for-commodore-64/

#RetroComputing #Commodore64