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You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > Mac II Bus Master Card

Mac II Bus Master Card
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Join Date: Apr 2002
Location: Wisconsin
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Apr 1, 2002, 02:07 AM
I have two Mac II Bus Master Cards sitting here.

What the heck do they do?

I assume that this would make an old mac II a little bit faster? . .what exactly do these do?
Why do people list their system configs?
G4 400Mhz (AGP) 1.5G RAM/32meg Radeon/Magma 7-Slot PCI Expansion Board in Q2000 Case/3 Sonnet ATA66 cards/Sonnet ATA133 RAID card/Adaptec 29160N/Adaptec 2930/ATI rage 128 PCI/M-Audio Delta 44/Unitor8 USB MIDI/La Cie FW-CDRW/Hitachi 6x DVD-ROM/Hitachi DVD-RAM/2 Hitachi RasterOps 19' Displays/755GB of ATA and SCSI Hard disk space.
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Join Date: Oct 1999
Location: Austria
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Apr 4, 2002, 09:03 AM
Hello Nicholas,

Bus Mastering is a concept where cards in a bus get "shortcut" paths to a system's RAM or maybe to a video card in the same bus.

A bus master card needs another card also capable of bus mastering to work. These two cards would be connected directly by a special ribbon cable.

As far as I remember there were just a few highly specialized cards (like video digitizer cards and such) available in the days of the Mac II that did take advantage of bus mastering.


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