I look at recently released #Commodore64 Wizball music source code, get it assembling using Acme assembler, and find some unreleased new music that was not in the original Wizball. youtu.be/Jkwa1CNEKDw

I look at #Amiga "Zippy Race!" a nice work in progress arcade perfect conversion by Dimitris Giannakis - MVG @modernvintagegamer.com . Using a nice triple buffer extra space scroll, blitter objects, and hardware sprites. youtu.be/Fu4DmcWtChI

When the #Commodore64 Wizball music source code was recently released, of course it inspired me to do a video... youtu.be/kBFl72G6sus

I look at #Amiga "Mr Nutz: Hoppin' Mad" published in 1994. Mostly looking at the lovely parallax and how the game uses hardware sprites for the player and score display. youtu.be/YFyFf0OqPks

When that horrible person is no more, please do call me, text me, email me, to give me the good news, because the world will celebrate. You know who... It goes without saying.

I look at #Commodore64 "Galencia" published in 2017 by Protovision. Lots of polish in this game, lovely sprite multiplexor, sprite colour splits, and parallax stars. It plays really well. youtu.be/iRsc1_75l54

Is this a five slot simultaneous #Commodore64 cartridge fast programmer I see before me?

I look at Commodore 64 "Karateka" published in 1985 by Brøderbund. The game uses two multicoloured bitmap screens, and I try to understand the pixel draw code... Can it be optimised? youtu.be/7iXIzHpycL8

I look at #Amiga "Lionheart" published in 1993. Using two emulator-debuggers to show double buffered screens, with swapping pristine buffer, more sprite copper tricks, and parallax scrolling. youtu.be/O4kpojFHwUI

Sigh. Even with ~20ns of digital filtering on the C64U user port there is still a high signal blip of ~20ns right in the middle of the _PC negative edge, which means the wrong signal level can be selected while _PC is low... The data transitions 10ns before this.

Showing the 8 megabyte #C64MegaCart version with my After Burner game demo on a real #Commodore64. youtu.be/A3ZS85XYVtg

I look at #Commodore64 "Dragon Breed" published in 1990 by Activision. The sampled intro with zoom animation, flickering multiplexor, and use a tool to emulate a Ye Olde Style CRT TV. youtu.be/PppEf2q0oDk

Yes it's an 8 megabyte flash #Commodore64 cartridge.

I thought I would add a test menu, like the original arcade version, for #MegaWang After Burner... This will make it easier to test my new Audio3 PCBs.

I look at #Amiga "Turrican" published in 1990 by Rainbow Arts. It uses a double buffer plus pristine buffer for the scroll, with minimal edge updates, and also look at some of the early boss sections. youtu.be/W67vrdKYHMw

A short video showing the #C64 #MegaCart case, programming, and use. youtu.be/x988wTCP7Js

I've recently been in #MegaWang hardware mode again. This is an Audio3 board that uses variable coded delta compression. It has 61% lossless compression compared to standard 8-bit PCM. It's going to replace the standard PCM Audio2 board. :)

I look at a few #Commodore64 games and show how they unlocked super secret hidden colours... Not really, it's quickly alternating complementary colours with CRT display effects. youtu.be/eUD5XPWPer4

I look at #Amiga game "Leander", published in 1991 by Psygnosis. Interesting use of hardware sprites for parallax mountains, and player with pixel accurate collision to the game objects. youtu.be/gQYSRjGkhBg

I look at #Commodore64 "Mayhem in Monsterland" published in 1993 by Apex. I look at the HSP/VSP/DMA delay scroll, FLD scroll, a pixel scroll without hardware, and hidden/disabled sprites during the game. youtu.be/RfC0jgk57t8

I look at #Amiga "Cecconoid" published in 2024 by Thalamus. It uses a dual playfield mode, with CPU updating particles, the blitter modifies particle code, and hardware sprite multiplex with the copper. youtu.be/7OVBSs_Rl60

I look at #Commodore64 "Battle Command" published in 1991 by Ocean. Really nice filled 3D, with double buffered bitmaps, and also a look into the game and render code. youtu.be/S49jeYzWgB8

This brings back memories... "The WAIT instruction causes the Copper to wait until the video beam counters are equal to (or greater than) the coordinates specified in the instruction. While waiting, the Copper is off the bus and not using memory cycles."

I look at #Commodore64 demo "The Hat" by Fairlight and Genesis Project, specifically the end upscroller part that shows a "hires" scroll in all borders. youtu.be/Vfnyczaf1Ao

I look at #Amiga "Shadow of the Beast" published in 1989 by Psygnosis, developed by Reflections. How it uses dual playfields, hardware sprites, blitter objects, and the screen scrolling. This is a new series, let me know if you like this or not. :) youtu.be/V1APacXhoJI

I look at #Commodore64 demo "The Hat" by Fairlight and Genesis Project, specifically the part with the "14 balloon sprites" in a row and its "hires" scrolling border message. youtu.be/DyteWLEPKzE

I look at Commodore 64 "3D Construction kit" and "Driller", using the Freescape engine. The rendering uses a linear flipped buffer before converting to a VIC bitmap format. youtu.be/aXMpQiw2kP0

When you code stuff, what do you think? I realised years ago when I am thinking about something to code (or electronics) then I visualise in my mind's eye the structure an large complex interconnected shapes, that move, have colours, and are attached to certain emotions.

Our #cats now have their own channel... www.youtube.com/@CatsMimosaA...

I look at #Commodore64 "Beer Rescue" published in 2025 by TSA Society. Retro style game, with good use of hires and multicolour, level cheat and sprite collision, and a hidden (recovered) file. youtu.be/ZJiEGwJKf7E

I have work to do, my #cat says no.

This is a sad day @killedbygoogle.com

Next #C64MegaCart PCB and case production run has started...

#C64MegaCart support is now in Vice version 3.1, the Win32 EXE and source changes are here: github.com/martinpiper/...

Warning, very technical: I look at Commodore 64 "Last Ninja 3" published in 1991 by System 3, the bitmap dissolve, and document the map data format. Lots of reverse engineering in here. Beware it is filled with code! www.youtube.com/watch?v=TLGF...

#Electronics fam, I'm looking for a replacement 3-colour LED driver with these specs... Any idea?

#C64Utlimate user port digital filter, probably the smallest ever PCB I've ordered from @pcbwayofficial.bsky.social ... :)

I look at #Commodore64 "Last Ninja 3" published in 1991 by System 3, the animated intro, and how the map and objects are drawn. youtu.be/CQhq0jLEQKY

Because some comments said there wasn't enough time to add extra sprites, I filled the vertical screen with sprites that update their position every line, and added music... The #C64Ultimate really does have a lot of CPU time... www.youtube.com/watch?v=XWUd...

Woohoo

I added extra parallax and squishy effects to the new Mega Multicolour Mode for the #C64Ultimate. This is to show there is ample time for lots of extra stuff with this screen mode. youtu.be/dQv_epsBdgk

This is a demo of a new Mega Multicolour Mode for the #C64Ultimate. This allows any multicolour pixels anywhere on the screen, no colour restrictions, with another screen (hires/multicolour/bitmap) in front, and with sprites active. I think this has not been seen before. youtu.be/lnbQw3t1qFA

I have something cooking...

I run a few tests with my #C64Ultimate at 64MHz, software video decompression and easily opening the side borders without any of the usual cycle accurate stable IRQ/timer stuff that is usually needed. youtu.be/2DjhBKUyuoo

I look at #Commodore64 "Gee Bee Air Rally" released by Activision in 1987. This game surprised me by using multicolour bitmap software sprites as well as hardware sprites to allow rendering large sprites in the same horizontal band. youtu.be/my8D9vJ-xxk

When you forget to add a wait for vsync in your video playback code...

This shows an optimised 3D test on my new #Commodore64Ultimate machine, running at 64MHz. Full source code and the PRG file are linked in the video description. The optimisation is run from RAM, not cartridge ROM. It's a lot faster than the stock C64 now. youtu.be/_TFLTdHAD4Q

Today I've been running a lot of old code and projects on the #Commodore64Ultimate in 64MHz mode. Games like Footy with sampled audio and full screen scrolling is really possible. All of the other stuff that uses sprite multiplexing and full colour scrolling is instantly smooth.

Hunting in my parts box for a couple of 74LS32 through hole.