Amiga Hardware Database Expansion cards

ONBoard 4000 Photo
RBM Digitaltechnik, Germany
    Zorro III busboard
  • 7× Zorro III slots
  • 2× extended video slots
  • 5× ISA slots
  • the video and ISA slots are all inline with a Zorro slot
  • only the first four Zorro slots are DMA capable
  • designed only as a double sided PCB, not as a multi layer one (with dedicated ground and power layers) as requested in the Zorro III specifications
  • replaces the original A4000 daughterboard
  • the board is part of the Towerhawk 4000 tower system

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