0xC0DE

I finally got around to creating a simple static website with most of my free games and tools. Play my games online by clicking on the game's image, or visit the corresponding GitHub page. It also lists most of the places you may find me online 😎 0xc0de6502.github.io

I thought my joystick support code in my Acorn Electron emulator (Electroniq) was not working properly. But I am now convinced, after testing with ancient analogue joysticks on a real Electron with a Plus 1 add-on, that actually joystick support in some games is just broken!?

New Acorn Electron demo effect. I am pretty sure this 50fps hardware scroll with *single* scanline precision has never been done on the humble Elk... until today! 💪😎 Remember, the Electron has no CRTC or other dedicated video chips

By exploiting CPU/ULA RAM contention it is easy to have a stable raster for any part of the screen. The example in MODE4 also shows that not all emulators are equally accurate. First image is correct (real Electron, Electroniq, Elkulator), 2nd is Clock Signal, 3rd is Electrem

Electroniq WIP. I'm a sucker for *detailed* information while debugging my Acorn Electron 6502 asm code. Visual indication of the electron beam? Check. Current PAL field, scanline and exact 2MHz cycle within that scanline? Say no more, I got you covered... and then some! 🤣

Electroniq WIP. New feature now online: view RAM as pixels in any selected (or automatic) screen mode. It is a great way to see what is going on 'behind the scenes', in a hidden screen buffer for instance. Try it yourself at 0xc0de6502.github.io/electroniq/

Electroniq WIP. New debugger feature coming soon. Jump from breakpoint to breakpoint or singlestep through your 6502 source code, all while drawing over the previous PAL field and showing the exact position of the 'electron beam' in the current PAL field (+ hblank and vblank)

Electroniq WIP. New and improved version online. Now handles anything a real Acorn Electron can (famous last words). If you don't get a stable 50fps (looking at you Firefox) please try a different browser (or system 😉). Any issues? Let me know... 0xc0de6502.github.io/electroniq/

Electroniq WIP. That's Southern Belle (and Evening Star) fixed (yes, they are slow games)! I tried to clear a tape interrupt using a bitwise-OR! 🤦 These were the last known(!) incompatibility issues I needed to fix in my Acorn Electron emulator. Putting it online soon 😎

Electroniq WIP. This was a pig to get 100% right in my emulator. FireTrack for the Acorn Electron is a technical marvel and a great test for emulator writers. I can now throw almost anything at Electroniq and it will just work like a real Electron 😎

Electroniq WIP. I can finally run one of my older Acorn Electron demos flawlessly in my emulator. So now a real Electron and Electroniq (next release) are the only 2 machines that can run my demo correctly 😎

Thanks @merman1974 for publishing your entire interview with me on your blog! 👍

I was a bit sidetracked (ok, obsessed) with improving the accuracy of my Acorn Electron emulator. My tests show that the CPU now correctly switches between 0, 1 and 2MHz controlled by the ULA. Including cycle stretches when slowing down from 2MHz to 1MHz

Just a quick "unboxing" (not sure if that applies to a magazine!) of the Retro Gamer I received yesterday, including some ramblings about the Dune launch party, 20 years in Norway, and Michael Bay! 😅 youtube.com/watch?v=39Phug… Noticed that @0xC0DE6502 was also in the magazine!

Acorn Electron shoot 'em up WIP. Name reveal! Enemies now shoot back 😰, but our little spaceship has a shield as well 💪

Acorn Electron shoot 'em up WIP. Quick screenshot to show the work I've done on the dashboard / status panel at the top of the screen

Acorn Electron shoot 'em up WIP. Let's destroy some enemies. Your spaceship can fire quickly, but enemies have shields!

Acorn Electron shoot 'em up WIP. Double the number of enemies and throw in a couple of stars for good measure, you say? Sure, here you go! 😜

Acorn Electron unnamed shoot 'em up WIP. Finally managed to add some enemies (harmless for now!). Took some head-scratching while writing my 472th custom sprite plotting routine 😎

Acorn Electron game WIP. Initial screen layout and spaceship movement. Will probably add obligatory stars in the background 😎

Quick mockup. Still toying with a parallax landscape for some sort of a shoot 'em up game on the Acorn Electron. This is a completely different method than my previous parallax effect, namely colour cycling parts of the screen