Casiomania by KittenLabs [web]
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### Release info
The first ever demoscene release by KittenLabs.
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
### Hardware requirements
Hitachi SH-4 CPU required! Won't work on SH-3 CPUs!
SH-4 CPUs can be identified by software version "2.02.xxx" (instead of "2.01.xxx")
Tested/developed on a (modded) fx-9750GII.
Might work on:
- 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)
Graph 35+E have different displays (T6K11 rev. 2), untested, might glitch at start/crash.
### Credits
Code: Manawyrm, Enfys, juvi
### Third-party credits
Fonts:
Vexed - Logic Loop
Libraries:
Lephenixnoir - fxSDK / gint
a1k0n - arduboy3d
avaneev - lzav
jfdelnero - hxcmod
SDL2 (for internal PC development version)
Music:
Jester - dazzler.mod
xneko: Masayuki Koba
### Notes
DSD/"1-bit DAC" audio playback would've been easily possible in software
but the output driver/serial hardware of the Casio seems to have very low
drive strength / slow rise times.
Using a DSD-routine resulted in very poor audio.[ back to the prod ]