Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Amiga_Zorro_III> ?p ?o }
Showing triples 1 to 54 of
54
with 100 triples per page.
- Amiga_Zorro_III abstract "Released as the expansion bus of the Commodore Amiga 3000 in 1990, the Zorro III computer bus was used to attach peripheral devices to an Amiga motherboard. Designed by Commodore International lead engineer Dave Haynie, the 32-bit Zorro III replaced the 16-bit Zorro II bus used in the Amiga 2000. As with the Zorro II bus, Zorro III allowed for true Plug and Play autodetection (similar to, and prior to, the PC's PCI bus) wherein devices were dynamically allocated the resources they needed on boot.Zorro III continued Zorro II's direct memory-mapped address design (unlike 80x86 processors, the MC68K family used in the Amiga did not have a separate I/O address mechanism). Just as with Zorro II on 24-bit systems, Zorro III reserved a large chunk of 32-bit real memory address space for large memory mapped cards, a smaller chunk with smaller allocation granularity for "I/O" type board. Zorro III was never supported on 24-bit address or 16-bit data devices—it required a full 32-bit CPU. The CPU could directly address any Zorro III device as memory, so Zorro memory expansions could be made (and were made) as well as it being possible to use video memory on a video card to be as system RAM.As an asynchronous bus, Zorro III specified bus cycles of set lengths during which a transaction conforming to the specifications of the bus could be carried out. The initial implementation of Zorro III was in Commodore's "Fat" Buster (BUS conTrollER) gate array, assisted by a very high speed PAL and numerous TTL buffer chips for bus buffering, isolation, and multiplexing. The Amiga 4000 implementation was fundamentally the same, but integrated a second gate-array to replace the TTL buffers. The Buster chip provided bus arbitration, translation between the MC68030 bus protocols and either Zorro II or Zorro III bus cycles (geographically mapped based on the Zorro bus address), and a vectored interrupt mechanism, generally not used. Zorro II bus masters were legal bus hogs, but Zorro III devices were fairly arbitrated and had controller-limited bus tenure. Despite being a 32-bit bus, Zorro III used the same 100 way slot and edge connector as Zorro II. The extra address and data lines were provided by multiplexing some of the existing connections with the nature of the lines changing at different stages of the bus access cycle (e.g. address becoming data). However, the bus was not fully multiplexed; the lower 8-bits of address were available during data cycles, which allowed Zorro III to support a fast burst cycle in page-mode. Of course, properly designed Zorro II expansion cards could coexist with Zorro III cards; it was not a requirement of a Zorro III bus master to support DMA access to Zorro II bus targets. Cards could detect a Zorro III vs. Zorro II backplane, allowing certain Zorro III cards to function when connected to the older Zorro II bus, though at Zorro II's reduced data rates.The Zorro III bus has a theoretical bandwidth of 150 MByte/s, based on an ideal Zorro III master and slave device running with minimum setup and hold times. The real transfer speed between the Amiga 3000/4000 implementation of Zorro III and a Zorro III card is somewhere around 13.5 MByte/s due to the limitations of the Buster chip. This was comparable to Intel's first PCI implementation, which peaked at 25 MByte/s. Zorro III was optimized for future single-chip implementations of the protocol, but the resources available at Commodore in 1990 limited the initial implementation.This is also the limiting factor with 3rd party Amiga PCI expansion boards like e.g. Elbox Mediator PCI or the Matay Prometheus PCI (about 12 MByte/s PCI to 68k-system). DMA transfers between two Zorro III cards (or PCI cards on an PCI expansion board) can be much faster.".
- Amiga_Zorro_III wikiPageExternalLink search.pl?intf=z3.
- Amiga_Zorro_III wikiPageExternalLink index_e.html.
- Amiga_Zorro_III wikiPageExternalLink zorro3.pdf.
- Amiga_Zorro_III wikiPageID "3266942".
- Amiga_Zorro_III wikiPageLength "8406".
- Amiga_Zorro_III wikiPageOutDegree "22".
- Amiga_Zorro_III wikiPageRevisionID "552316189".
- Amiga_Zorro_III wikiPageWikiLink 16-bit.
- Amiga_Zorro_III wikiPageWikiLink 32-bit.
- Amiga_Zorro_III wikiPageWikiLink Amiga_2000.
- Amiga_Zorro_III wikiPageWikiLink Amiga_3000.
- Amiga_Zorro_III wikiPageWikiLink Amiga_Chip_RAM.
- Amiga_Zorro_III wikiPageWikiLink Amiga_Zorro_II.
- Amiga_Zorro_III wikiPageWikiLink Bus_(computing).
- Amiga_Zorro_III wikiPageWikiLink Category:Amiga.
- Amiga_Zorro_III wikiPageWikiLink Category:Computer_buses.
- Amiga_Zorro_III wikiPageWikiLink Category:Motherboard_expansion_slot.
- Amiga_Zorro_III wikiPageWikiLink Commodore_International.
- Amiga_Zorro_III wikiPageWikiLink Computer_bus.
- Amiga_Zorro_III wikiPageWikiLink Computer_peripheral.
- Amiga_Zorro_III wikiPageWikiLink Conventional_PCI.
- Amiga_Zorro_III wikiPageWikiLink Dave_Haynie.
- Amiga_Zorro_III wikiPageWikiLink Edge_connector.
- Amiga_Zorro_III wikiPageWikiLink List_of_device_bandwidths.
- Amiga_Zorro_III wikiPageWikiLink List_of_device_bit_rates.
- Amiga_Zorro_III wikiPageWikiLink Motherboard.
- Amiga_Zorro_III wikiPageWikiLink Peripheral.
- Amiga_Zorro_III wikiPageWikiLink Peripheral_Component_Interconnect.
- Amiga_Zorro_III wikiPageWikiLink Random-access_memory.
- Amiga_Zorro_III wikiPageWikiLink Random_access_memory.
- Amiga_Zorro_III wikiPageWikiLink Zorro_II.
- Amiga_Zorro_III wikiPageWikiLinkText "Amiga Zorro III".
- Amiga_Zorro_III wikiPageWikiLinkText "Zorro III".
- Amiga_Zorro_III wikiPageWikiLinkText "Zorro-II".
- Amiga_Zorro_III wikiPageWikiLinkText "Zorro-III".
- Amiga_Zorro_III hasPhotoCollection Amiga_Zorro_III.
- Amiga_Zorro_III wikiPageUsesTemplate Template:Amiga_hardware.
- Amiga_Zorro_III wikiPageUsesTemplate Template:Computer-bus.
- Amiga_Zorro_III wikiPageUsesTemplate Template:Reflist.
- Amiga_Zorro_III subject Category:Amiga.
- Amiga_Zorro_III subject Category:Computer_buses.
- Amiga_Zorro_III subject Category:Motherboard_expansion_slot.
- Amiga_Zorro_III type Computer.
- Amiga_Zorro_III type Connector.
- Amiga_Zorro_III type Protocol.
- Amiga_Zorro_III comment "Released as the expansion bus of the Commodore Amiga 3000 in 1990, the Zorro III computer bus was used to attach peripheral devices to an Amiga motherboard. Designed by Commodore International lead engineer Dave Haynie, the 32-bit Zorro III replaced the 16-bit Zorro II bus used in the Amiga 2000.".
- Amiga_Zorro_III label "Amiga Zorro III".
- Amiga_Zorro_III sameAs m.092918.
- Amiga_Zorro_III sameAs Zorro_III.
- Amiga_Zorro_III sameAs Q4053614.
- Amiga_Zorro_III sameAs Q4053614.
- Amiga_Zorro_III wasDerivedFrom Amiga_Zorro_III?oldid=552316189.
- Amiga_Zorro_III isPrimaryTopicOf Amiga_Zorro_III.