Amiga Hardware DatabaseManufacturer “Keybonus Ltd.”
2 expansions in database
Manufacturer Keybonus Ltd. / Amiga Centre Scotland, UK | Date 1991 | Amiga A2000, A3000, A4000 | Interface Zorro II | Autoconfig ID 2118 / 100 |
- framebuffer
- the Amiga's first 24 bit display device
- designed to provide compatibility with genlocks, single frame controllers and other video equipment
- 24 bit display 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
H4000 with daughterboard installed, front side
H4000, front side
H4000, back side
Sat & TV card, front side
Sat & TV card, back side
Daughterboard, back side
H2000, front side
H2000, front side
H2000, back side
- Harlequin.pdf
user manual
110 kB
- Harlequin.dms
install and developers disk
harlequin.device v3.02 (21 Feb 1991), harlequin.library v11.07 (11 Jun 1992)
453 kB
Manufacturer Keybonus Ltd. / Amiga Centre Scotland, UK | Date 1993 | Amiga A2000, A3000, A4000 | Interface Zorro II | Autoconfig ID 2118 / |
- framebuffer
- designed to produce RGB component video with CCIR compliant blanking and synchronisation (doing the half lines, serrations and equalizing pulses)
- built in genlock - its output can be synchronised with a black burst studio reference, but does not do keying or mixing
- filterd output signal, so it is quiet and properly band-limited
- screen modes:
- vertical resolution is fixed by CCIR compliance to 576 lines for the PAL variant, 486 for the NTSC variant
- horizontal resolution can be selected from 910, 832, 768 (square pixel) or 720 for PAL, or 910, 832, 640 (square pixel) or 720 for NTSC
- 15 kHz interlaced (CCIR compliant) or 31 kHz non-interlaced (VGA timings)
- as well as normal 24 bit colour the board supports 24 bit palette mapped colour
- supports 15 bit graphics
- supports 8 bit direct or 8 bit palette mapped (from 24 bit palette) graphics
- uses the Brooktree Bt473 RAMDAC same as the OpalVision
- the framebuffer allows for storing a 24 bit image or 3× 8 bit palette mapped images
- with the double buffering option it allows for 2× 24 bit, 2× 15 bit or 6× 8 bit images stored simultaneously
- the buffer switching is synchronized to vertical blanking and can be switched every frame if necessary
- the 8 bit alpha channel can be output as an analog signal for linear keying or anti-aliasing
- it can also be reassigned to provide a 15 colour palette mapped overlay screen in addition to the main screen
- the board can be configured to produce interrupts on the first and/or second field of the interlace
- memory:
- H2000 Plus: 2 MB VRAM
- H4000 Plus: 4 MB VRAM and double buffering
- the VRAM is linearly mapped into the Zorro II address space
- backwards compatible with the Harlequin
- optionally bundled with MacroSystem's V-Lab Y/C real-time digitizer