Software:demoscene:Jump by Public NMI (1992) - Wengier/dosbox-x-wiki GitHub Wiki

[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

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:

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.