Casiomania, a demoscene release by KittenLabs

Casiomania is the first ever demoscene release by KittenLabs. It is written in C, released at Revision 2026.

Tech internals

Audio playback through UART/Serial link port

• 19000Hz @ 8bit PCM, played using DMA-based PWM
• real ProTracker/Amiga 4-channel .mod playback
• fully async (interrupt-driven) playback, no main loop interaction required
• UART being driven in synchronous mode (without start/stop bits) to avoid distortion

Grayscale support through timer/interrupt-driven multiplexing

• 2-bit grayscale rendering

Overclocking through SH7305 CPG/PLL manipulation

• CPU clock -> 29 MHz -> 236 MHz
• Bus clock -> 29 MHz -> 118 MHz
• Battery current increases from ~1mA -> 110mA

Might work on Casio models:

• fx-9860GII (only the SH-4 variants)
• fx-9860GIIs
• fx-9860G AU+ (australian model)
• Graph 35+E/75+/75+E
• Graph 35+/75/95 (only the SH-4 variants)

See the video below and more on GitHub.

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