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Mediator PCI Z-III
The Mediator is a PCI implementation for connecting PCI devices in Amiga computers,
allowing expansion of Amiga with all kinds of industry standard hardware products
like graphic, sound, network, USB, TV tuner, ISDN and MPEG-2 hardware decoder PCI cards.
Moreover, the Mediator PCI busboard is ready for SharkPPC PCI cards based on the latest
PowerPC G3 and G4 processors.
The minimum hardware configuration is: any Amiga with Zorro III slots and
68030 processor card.
The recommended configuration is: Amiga 3/4000T with any 68060 (or PPC with 68060)
turbo card with 64MB RAM, a SharkPPC G3/G4 card with 128MB SDRAM, a Voodoo3 graphic card.
The Mediator PCI Z-III features:
4 PCI slots (PCI 2.1 compatible)
For simultaneous use of up to four PCI cards fully assimilated in the Amiga environment.
33MHz PCI clock (66MHz with SharkPPC G3/G4)
With the PCI clock running at 33MHz, data transfers are executed with the bandwidth of
up to 132MB/s and up to 264MB/s for 66MHz clocking.
32-bit PCI datapatch
Longword transfers are supported in all data transfer types: PCI to Amiga, Amiga to PCI
and PCI to PCI.
4GB PCI memory space
Mediator PCI 4000 allows access to the entire 4GB of the PCI memory space. Access to
the entire PCI memory space is executed through the 512MB window in the Zorro III space.
With a hardware-supported paging mechanism, PCI memory access is executed without any
slowdown compared to the linear memory access.
Busmastering/DMA in all PCI slots
Mediator PCI supports the busmastering mechanism in all its PCI slots. The PCI cards
in the busmaster mode can offer extremely fast DMA access (up to 132MB/s) without any
CPU load. Up to four PCI busmaster cards may be used simultaneously in Mediator.
SDRAM/SGRAM of PCI gfx card as system memory
Mediator PCI Z-III can use part of the graphic card memory for Amiga system needs.
Thus, the entire system gains in effectiveness as graphic card's SDRAM/SGRAM memory
modules are about 10x faster than FastRAM memory in Amiga turbo cards. With very
short access time in SDRAM/SGRAM, several PCI busmaster cards may use this memory
simultaneously. The PCI cards may then rush at the data transfer rate of up to 132MB/s
without any CPU load whatsoever.
DMA to A3/4000 motherboard space
Mediator PCI Z-III includes a busmastering controller supporting transfers between
PCI cards and the A3/4000 motherboard space.
Address and data parity control support
Address and data parity are supported in all Mediator slots. Parity support is necessary
for using PCI cards like Sound Blaster Audigy, Sound Blaster Live! or ForteMedia
FM801-based PCI cards.
Interrupt controller (4 lines)
The Mediator Interrupt Controller manages four independent interlived PCI interrupt lines.
PCI and Zorro
Mediator PCI Z-III enables simultaneous operation of PCI cards in its slots and
Zorro III/II cards installed in the Zorro slots.
Mediator PCI Z-III is compatible with all A3/4000 processor card models.
The Mediator PCI Z-III card is installed in any Zorro III slot.
The Mediator PCI Z-III card is recommended only for Amiga 3/4000T computers, which do
not have a daughterboard, that is with Zorro III slots installed on the motherboard.
In case of all other A3/4000 computers we strongly advise the choice of
new daughterboard and Mediator PCI 4000, which enable
the seamless installation of PCI and Zorro cards.
The following PCI cards are currently supported in Mediator PCI 1200:
The following PCI card support is currently being developed:
- I/O cards
- MPEG-2 hardware decoders
The Mediator PCI Z-III is available with a standard software pack: 2D and Warp3D Voodoo3
graphic drivers, Voodoo4 and Voodoo5 24-bit 2D graphic drivers, S3 ViRGE and S3 ViRGE DX 2D
graphic drivers and Ethernet 10Mbps network drivers.
Mediator PCI Z-III can also be obtained with an extended software pack including the
Mediator Multimedia CD.