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framebuffer

• the Amiga’s first 24 bit display device
• designed to provide compatibility with genlocks, single frame controllers and other video equipment
• 24 bit display7 and realtime animation
• the output of the Harlequin is totally independent from the Amiga video
• multiple Harlequin boards can be installed in one Amiga, each driving a separate device and outputting a different image
• optional 8 bit alpha channel – superimpose high quality graphics onto live signal, or smoothly blend paint images
• optional double buffering – two 24 bit displays instantly available
• screen modes:
  • 740×486, 832×486, 910×486 (NTSC, 60 Hz)
  • 740×576, 832×576, 910×576 (PAL, 50 Hz)
  • 4, 8, 15 and 24 bit colour depth
  • 15 kHz interlaced or 31 kHz non-interlaced in all resolutions
• models:
  • H1500 1.5 MB VRAM
  • H2000 2 MB VRAM – alpha channel
  • H3000 3 MB VRAM – double buffering
  • H4000 4 MB VRAM – alpha channel + double buffering
  • all models can be upgraded to later ones
• outputs (two DB15 connectors):
  • RGB + Composite sync
  • digital key output
  • alpha channel
  • genlock control lines
• sandwich card, it occupies the space of two Zorro slots
• separate PAL and NTSC versions