Information Technology Reference
In-Depth Information
(c)
32 MB/s
(d)
64 MB/s
3.6.5
What is the main disadvantage of PC, ISA and EISA busses:
(a)
They are incompatible with each other.
(b)
They use a fixed clock frequency.
(c)
They are not supported in PC systems.
(d)
They are expensive to implement.
3.6.6
What is the maximum transfer rate (in B/s) for a 10 Mbps Ethernet adaptor:
(a)
1 MB/s
(b)
1.221 MB/s
(c)
10 MB/s
(d)
100 MB/s
3.6.7
Prove, apart from the MCA bus, the transfer rates given in Section 3.5.
3.6.8
If an audio card is using 16-bit sampling at a rate of 44.1kHz. Prove that the trans-
fer rate for stereo sound will be 176.4 KB/sec. Show, also that this is equivalent to
1.411 Mbps (note that this is approximately the standard rate for CD-ROMs). Can
this rate be transferred using the ISA bus? Using this transfer rate, determine the
maximum transfer speed of a ·32 CD-ROM drive.
3.6.9
Determine amount of data for a single screen that required to be transferred for the
following screen resolutions:
(a) 800·600, 65 536 colours (960 000 B/s).
(b) 800·600, 16 777 216 colours (1 440 000 B/s).
(c) 1024·768, 65 536 colours (1 572 864 B/s).
Determine the maximum number of screen updates that is required for a 32-bit
PCI bus for each of the above.
3.6.10
Identify the main ISA signal lines and how they are used to transfer data. Answer
clearly the following:
(a) The main differences between a PC card and an ISA card.
(b) How the byte enable lines are used.
(c) How is a read or write transfer identified?
(d) How is a memory read/write or isolated memory read/write transfer identi-
fied?
(e) The interrupt lines which are available on a PC card and an ISA card.
Typically what devices could be supported by a PC card (that is, what devices use
the interrupts that a PC card can support). How does this related to the original
specification of the PC?
