kolektiva.social

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@haitchfiveInterrupt-driven music on the SAM Coupé <a href="https://www.youtube.com/watch?v=7dChA59oJuo" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=7dChA59oJuo</a><a href="https://oldbytes.space/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#retrocomputing</a> <a href="https://oldbytes.space/tags/retrodev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#retrodev</a> <a href="https://oldbytes.space/tags/samcoupe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#samcoupe</a> <a href="https://oldbytes.space/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#programming</a> <a href="https://oldbytes.space/tags/ZXSpectrum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZXSpectrum</a> <a href="https://oldbytes.space/tags/Speccy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Speccy</a> <a href="https://oldbytes.space/tags/Spectrum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Spectrum</a> <a href="https://oldbytes.space/tags/z80" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#z80</a>

QuazarTomorrow is the Legendary Gathering at the Retro Computer Museum in Leicester, UK. See you there! <a href="https://retrocomputermuseum.co.uk" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://retrocomputermuseum.co.uk</a><a href="https://mastodonapp.uk/tags/retrogaming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#retrogaming</a> <a href="https://mastodonapp.uk/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#retrocomputing</a> <a href="https://mastodonapp.uk/tags/samcoupe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#samcoupe</a> <a href="https://mastodonapp.uk/tags/zxspectrum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#zxspectrum</a>

¡a!nGot the scaffolding done for the character movement, so now there's a new test level and a little Scarfboy sprite on screen.<a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a>

¡a!nI think I'm done with scrolling, got a big performance boost by not switching pages two times for every tile(It doesn't tear on screen, thanks giphy capture.) (Oh yeah, the tiles have vivid pink so I can see where the transparent bits are. They'll be filled in background blue sometime)<a href="https://falsevictories.com/devdiary/#20232701" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://falsevictories.com/devdiary/#20232701</a><a href="https://kolektiva.social/tags/devdiary" class="mention hashtag" rel="tag">#devdiary</a> <a href="https://kolektiva.social/tags/samcoupe" class="mention hashtag" rel="tag">#samcoupe</a> <a href="https://kolektiva.social/tags/retro" class="mention hashtag" rel="tag">#retro</a> <a href="https://kolektiva.social/tags/gamedev" class="mention hashtag" rel="tag">#gamedev</a>

¡a!nSpent most of the week tracking down a weird occasional memory corruption bug in the <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> scrolling. Spoiler, it was in the interrupt handler. More in-depth discussion here: <a href="https://falsevictories.com/devdiary/" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://falsevictories.com/devdiary/</a> (and an Archer gif, cos I got images working)

¡a!nUpdated the <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> dev diary with some more random thoughts on scrolling. There’s now enough entries to check pagination works. It appears to so that’s good. <a href="https://falsevictories.com/devdiary" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://falsevictories.com/devdiary</a>

¡a!nOn the off-chance that anyone is interested in my <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> scrolling experimentation I've started a dev-diary at <a href="https://falsevictories.com/devdiary/" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://falsevictories.com/devdiary/</a> with longer form rambling than what I've mentioned here.

¡a!n<a href="https://kolektiva.social/tags/screenshotsaturday" class="mention hashtag" rel="tag">#screenshotsaturday</a> time just before bed. Got full screen scrolling working with the use of some more self modifying code and shadow registers, so yeah, it'll be totally maintainable. Some optimisation work still to do and the sprite painting code is hideous. Feel like I should keep a coding diary of something like in the old days but not sure what I'd put in it...<a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a>

¡a!nBeen a while, but new <a href="https://kolektiva.social/tags/screenshot" class="mention hashtag" rel="tag">#screenshot</a> update on my <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> <a href="https://kolektiva.social/tags/z80" class="mention hashtag" rel="tag">#z80</a> test platformer * scrolling now brings in the rest of the map * redid the level layout for a third time. Trying to be too clever in a compressed level format didn't help. Rewritten it to be as basic as possible - one huge uncompressed array of data * Reworked the map drawing code: now it uses a huge amount of self-modifying code that definitely won't come back to bite me at a later date. SMC is mostly used to avoid conditional jumps in tight loops and to avoid reading or recalculating a value. * still no right side clipping - meh, don't need it.

¡a!n<a href="https://mastodon.gamedev.place/@WalGallen" class="u-url mention">@WalGallen</a> <a href="https://kolektiva.social/@DreamGryphon" class="u-url mention">@DreamGryphon</a> been working on my map scrolling on the <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a>

¡a!nSpent a few days reworking the level data format , optimising it for size, and for drawing in columns so scrolling should be simpler. I should probably write this up somewhere, someone might find it useful (probably me)<a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> <a href="https://kolektiva.social/tags/ScreenshotSunday" class="mention hashtag" rel="tag">#ScreenshotSunday</a> <a href="https://kolektiva.social/tags/retro" class="mention hashtag" rel="tag">#retro</a> <a href="https://kolektiva.social/tags/GameDev" class="mention hashtag" rel="tag">#GameDev</a>

¡a!nthat picture's only about a 3rd of the height of the <a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> screen but I quite like the aspect ratio of it

¡a!nStill working on the scrolling (by popular vote), although really I'm working out the memory paging system to get a decent code structure before tackling scrolling.<a href="https://kolektiva.social/tags/SamCoupe" class="mention hashtag" rel="tag">#SamCoupe</a> <a href="https://kolektiva.social/tags/retro" class="mention hashtag" rel="tag">#retro</a> <a href="https://kolektiva.social/tags/z80" class="mention hashtag" rel="tag">#z80</a>

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