C64 Games memories - Nebulus

In this video I look at Commodore 64 Nebulus, the disk loader, tower rendering and sprites masking, as well as the bonus level.
There will be a part 2!
github.com/martinpiper/Debugg...
GMA disk loader: • Disk fast load digital...
Last Ninja sprite masking: • C64 Games memories - T...
00:12 Introduction
00:37 Disk loader - GMA Bleep load
01:23 Title screen in C64DebugGUI
02:30 Game overview and noting sprites
05:10 Tower draw below the water
06:16 ICU64 shows sprites and chars
07:30 Double buffered screens
08:44 Player sprites, lots of them
08:59 Sprite masking - 1
11:28 Bonus level parallax scrolling
12:26 Tower rendering
13:17 Sprite masking - 2
14:58 Rendering frames
16:00 Trying to find the platform draw
18:50 Screen clear sections
22:04 Character set data structure
24:00 Rendering platforms - 1
29:10 Tower rows draw
32:28 Finding other platform/object draws
35:56 Draw columns around the tower
41:51 Sprite masking - 3
42:11 Graphics memory shuffling

[@alanbourke4069]

Such a clever effect. I love games that get things 'for free' by redefining the char set

[@MartinPiper6502]

Yeah, it's one of the things I love about these older games, the little technical tweaks that make the magic happen.

[@Sumaleth]

One of the most inventive examples of coding we saw back in the 8-bit days. Very clever. A fave of anyone into C64 programming and visual design.
(If the gameplay had been tweaked just a little it would be in everyone's top 10 favourite C64 games.)

[@igork3522]

Thank you. I didn't play this game as I think I switched to A500 in '87. Very interesting.

[@stuartthorncraft2948]

great choice of game to cover!

[@MartinPiper6502]

Glad you think so! Thank you for the support. :)

[@bhamadicharef]

interesting video analysis ! Thank you for sharing !

[@MartinPiper6502]

My pleasure!

[@cpu_UP]

Happy to see you mentioned me. Played this game a lot when I was young but I was never able to finish it (5th tower was my best.) recreated it a few times on different platforms.

[@MartinPiper6502]

Thank you for the support :)

[@luxocrates]

😮
Thank you thank you thank you!

[@MartinPiper6502]

Thank you also :)

[@DMWB1970]

Great videos and good to see how things were done back in the day. If you do a second vid on Nebulus, it would be interesting to see how the sprite flipping works

[@MartinPiper6502]

Thanks for the idea, next video will cover that. Thank you for the feedback.