NMcCoy [Lexaloffle Blog Feed]

Picotron locks up when using memcpy with seemingly benign values

Mon, 30 Sep 2024 07:39:29 UTC

Trying to copy pixels within the video buffer.
If I put memset(0x10000+x+w*y,7,1) and memset(0x10000+x+w*refl,10,1) in my code, the expected pixels get set and nothing strange happens, but if I try to do memcpy(0x10000+x+w*y, 0x10000+x+w*refl, 1) then Picotron locks up completely - the music keeps playing but the program is unresponsive to the point that Windows gives a "not responding" crash popup.

Wavespark III: tawa suno wasoweli

Tue, 17 Sep 2024 04:37:29 UTC

wavespark3

by NMcCoy

[Click to Play]

A long-overdue sequel to an obscure one-button game I made eons ago, which inspired some better-known descendants. Hold X to increase gravity. Race rightward through checkpoints if you want (my record so far is 13).

Update 11: fancier ocean, subtle sand sound, dynamic music
Update 12: Made instructions less clear, many sound improvements, friendly dolphin gives you bubbles. Stars temporarily removed.
Update 13: Day (twilight)/night cycle, announcements for start and finish of race (with score tally).
Update 14: Adjusted music mix, made tally larger.
Update 15: Updated Picotron version, improved reflections, added stars. (might improve them later.)
Update 16: mi lili e wawa pi kalama anpa

Dragondot 3 (v1.1.1)

Sun, 09 Feb 2020 00:18:55 UTC

Dragondot 3 (1.1.1)

by NMcCoy

[Click to Play]

Be a dragon! Lay waste to your foes with your claws, bite, and fire breath! Gather gold and bring it back to your lair to grow in power! Bask in the adoration of your kobold followers! (Also you're a circle for some reason. This is Dragondot 3, you should be used to that by now.)

An action-adventure game full of secrets to find and new abilities to gain, drawing inspiration from the Legend of Zelda series among others. Map exploration, skills gained, and hoard stockpiled are all saved persistently, so you can continue your adventure across multiple sessions. Featuring over twenty different types of creatures to encounter, over twenty different skills to acquire (some with multiple upgrade levels), over a hundred map screens to explore (not even counting the dungeons, tunnels, and secret caves!) -- all packed into a single cozy little pico-8 cartridge.

You can get standalone executable versions plus a nice map of the overworld over at https://nmccoy.itch.io/dragondot-3.

Dragondot 3 (v0.8 open beta)

Sat, 01 Feb 2020 01:59:47 UTC

dragondot3_v08

by NMcCoy

[Click to Play]

Behold, the (prerelease version of) the next game in the beloved Dragondot series! I've been working on this for about a month, got it to a code-complete state and now I'm putting it out there for feedback on content/balance tuning. (All the creature stats, encounter info, doorways, and secrets are stored in the map data, so I can adjust those without any additional code overhead.) Please, let me know if you find any of the fights frustrating or confusing, or are dissatisfied with any part of the world map.

Puzzle Coven 0.91

Thu, 22 Nov 2018 13:18:47 UTC

A competitive puzzle game, inspired by Yoshi's Cookie, with magic spells and a Smash Bros.-like percentage system where the last one standing on the platform wins!

Puzzle Coven 0.91

by NMcCoy

[Click to Play]

Future iterations may include adjustable AI difficulty, selectable characters with different spells, and some snazzier visual effects.

Update v0.91: by request, added "slip cursor" movement style using (X).

Update v0.9: board-filling code is more diligent and now cannot generate spontaneous matches. Vertical matches are now checked first for possibly historical reasons.

(Character sprite based on Oddball's 8x8 sprites; title/countdown font is Alagard by Hewett Tsoi.)