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Q-Bus
CHF 57.30
Auf Lager
SKU
IRVPGO02G6I
Geliefert zwischen Do., 13.11.2025 und Fr., 14.11.2025
Details
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Q-bus was one of several bus technologies used with PDP and MicroVAX computer systems manufactured by the Digital Equipment Corporation of Maynard, Massachusetts. The Q-bus was a less expensive version of Unibus using multiplexing so that address and data signals shared the same wires. This allowed both a physically smaller and less-expensive implementation of essentially the same functionality. Over time, the physical address range of the Q-bus was expanded from 16 to 18 and then 22 bits. Block transfer modes were also added to the Q-bus. Memory-mapped I/O means that data cycles between any two devices, whether CPU, memory, or I/O devices, used the same protocols. On the Unibus, a range of physical addresses were dedicated for I/O devices. The Q-bus simplified this design by providing a specific signal (originally called BBS7, Bus Bank Select 7 but later generalized to be called BBSIO, Bus Bank Select I/O) that selected the range of addresses used by the I/O devices.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131365263
- Editor Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
- Größe H220mm x B220mm
- EAN 9786131365263
- Titel Q-Bus
- Herausgeber Betascript Publishing
- Anzahl Seiten 136
- Genre Informatik
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