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   Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 09:42:43 JST Alice Averlong🏳️‍⚧️

   I tried to use my "capture the game running on a super-slow CPU" trick on SimCity 2000 and got a surprising result: it just crashes immediately!

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Wednesday, 23-Jul-2025 09:42:43 JST ✧✦Catherine✦✧

     in reply to

     @foone question: how do you end up with a screen like this? aren't the text and graphics modes using different planes with incompatible encodings?

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     a kilo of saucepans (rakslice) (rakslice@mastodon.social)'s status on Wednesday, 23-Jul-2025 10:50:15 JST a kilo of saucepans (rakslice)

     in reply to

     • ✧✦Catherine✦✧

     @foone @whitequark like there's no reason a video bios couldn't know how to draw text in a graphics mode the video hardware supports

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Wednesday, 23-Jul-2025 10:50:15 JST ✧✦Catherine✦✧

     in reply to

     • a kilo of saucepans (rakslice)

     @rakslice @foone oh fair i forgot int 10h exists

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 10:50:16 JST Alice Averlong🏳️‍⚧️

     in reply to

     • ✧✦Catherine✦✧

     @whitequark They are! I'm not entirely sure this is possible on real hardware, but sometimes text modes are emulated on top of a vesa mode, so they can crash and collide like this

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:31:37 JST Alice Averlong🏳️‍⚧️

     in reply to

     I wonder how you write a program so that if your CPU suddenly drops to 1/100th speed, it crashes. weird.

     Haelwenn /элвэн/ :triskell: likes this.
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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:33:24 JST Alice Averlong🏳️‍⚧️

     in reply to

     • Very Human Robot

     @StompyRobot Sound is a good point! I went back and tried disabling music/sound to see if it'd help, but sadly no.

     Haelwenn /элвэн/ :triskell: likes this.
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     Very Human Robot (stompyrobot@mastodon.gamedev.place)'s status on Wednesday, 23-Jul-2025 15:33:25 JST Very Human Robot

     in reply to

     @foone many async systems have that problem. Sound playback is common.

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     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Wednesday, 23-Jul-2025 15:36:28 JST Haelwenn /элвэн/ :triskell:

     in reply to
     @foone Heh 'U' I guess the DOS is crying. ^^
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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:36:29 JST Alice Averlong🏳️‍⚧️

     in reply to

     I tried doing a memory dump and DOSBox says all 16 megabytes of ram I have are 0x55. 32bit DOS programs are so weird

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:36:30 JST Alice Averlong🏳️‍⚧️

     in reply to

     I suspect the crash is mouse related: I got it to run at 125 cycles/second for a couple seconds, but then I moved the mouse "too much" and it crashed

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:36:31 JST Alice Averlong🏳️‍⚧️

     in reply to

     130 is also way higher than I'd like, because you can memcopy the screen in like 50 frames at that speed

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:36:31 JST Alice Averlong🏳️‍⚧️

     in reply to

     so normally I use like 30 cycles per second for these slow-motion drawing GIFs. sadly this game is buffered and crashy at low speeds

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     Alice Averlong🏳️‍⚧️ (foone@digipres.club)'s status on Wednesday, 23-Jul-2025 15:36:32 JST Alice Averlong🏳️‍⚧️

     in reply to

     130 cycles/second seems to be the slowest you can set it without it crashing.
     it also double-buffers the screen so I can't easily capture it drawing the screen. I don't yet have a way to capture the evolution of off-screen buffers (though I've worked on it )