Mediator PCI 4000
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: Amiga 4000D with Elbox Zorro III/PCI busboard
installed in tower case. The recommended configuration is: Amiga 4000D with
Elbox Zorro III/PCI busboard in a Winner/Power/E-BOX 4000 tower case, any 68060 (or PPC
with 68060) turbo card with 64MB RAM, a SharkPPC G3/G4 card with 128MB SDRAM, a Voodoo3
The Mediator PCI 4000 features:
5 PCI slots support (PCI 2.1 compatible)
For simultaneous use of up to five 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 five PCI busmaster cards may be used simultaneously in Mediator.
SDRAM/SGRAM of PCI gfx card as system memory
Mediator PCI 4000 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 4000 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 PCI interrupt lines.
PCI and Zorro
Mediator PCI 4000 enables simultaneous operation of PCI cards in its slots and up
to six Zorro III/II cards installed in the Elbox Zorro III/PCI busboard.
Mediator PCI 4000 is compatible with all A3/4000 processor card models.
Mediator PCI 4000, PCI cards in its slots, Zorro III and Zorro II cards in Elbox
Zorro III/PCI busboard slots fit perfectly in the E/BOX 4000 (Power, Winner) Tower
The following PCI cards are currently supported in Mediator PCI 1200:
- Graphics cards like S3 ViRGE 4 MB, 3dfx Voodoo 3 16MB,
3dfx Voodoo 5 32MB
- MPEG-2 hardware decoders based in the EM8400 processor
- Ethernet-Karten with
or 10/100 Mbps
- Sound cards, e.g. based on the ForteMedia 801 chip like the
- USB controller
The following PCI card support is currently being developed:
- I/O cards
- MPEG-2 hardware decoders
The Mediator PCI 4000 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 4000 can also be obtained with an extended software pack including the
Mediator Multimedia CD.