1992 demoscene entry.
Demo description
(todo)
Recommended DOSBox-X configuration
[dosbox] memsize=1 machine=vgaonly [cpu] core=normal cputype=386 cycles=5000 [sblaster] sbtype=sbpro2 sbbase=220 irq=5 dma=1 goldplay=true goldplay stereo=true # the following are needed to work around bugs (DOSBox-X? Or the demo?) related to PIC masking. # they are HACKS to be used until the demo is further examined. pic unmask irq=true force dsp auto-init=true # alternatively, if you want to avoid the hacks and run it without problems, use the LPT DAC playback mode (and set cycles=7000) [speaker] disney=true
To run the demo, type JUMP.BAT
Bugs
Sound Blaster IRQ problems
Sound Blaster playback is unreliable due to problems with managing the PIC interrupt mask for the Sound Blaster IRQ. It is not known whether DOSBox-X or the demo is at fault.
Test results so far:
| Hardware | Sound card | Result |
|---|---|---|
Toshiba Satellite Pro 465CDX |
Yamaha OPL3-SA2 (Sound Blaster compatible) |
``Unlimited shadebob'' music plays fine. Music stops after 1-2 seconds in other parts. Same as DOSBox |
VGA blanking and the dot landscape
The dot landscape does not show up on screen if the cycle count is greater than about 7000. It also fails to appear on-screen on real 486 & Pentium hardware.