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finally after years of adding unimportant sports the ioc has finally added shoe tying to the olympics and youve been selected to write the software
sir i need visual basic form design amp coding for reynolds number amp type of flow
intels 8237 dma controller 1 the 8237 contain 4 independent io channels2 it contains 27 registers 7 of which are system-wide registers and 5 for each
dma dma stands for direct memory access it is uses same addressdata lines on isa bus it controls the isa bus instead of the processor bus master
the real time system rts calling the clock real-time is somewhat of a misnomer because it only shows the time setting it has been given the rtc is
intel 8259 interrupt controller the 8088 processor has only two interrupt control inputs and interrupt request intr and non mask able interrupt
pc bus and interrupt systemthe pc bus utilized a bus controller address latches and data transceivers bidirectional data buffers1 bus controller
there are 3 kinds of ocws the command word ocwi is utilized for masking the interrupt requests when the mask bit corresponding to an interrupt
the definitions of the bits in icwi are followingalways set to the value 1 it directs the received byte to icwi as oppose to ocw2 or ocw3which also
for an 8088 the 2 addresses linked with an 8259a are normally consecutive and the ao line is associated to the ao pin but because there are just 8
interrupt priority managementthe interrupt priority management logic indicated in given figure can be implemented in several ways it does not
interrupt tableeach interrupt level has a booked memory location called an interrupt vector all these vectors or pointers are stored in the
software interruptssoftware interrupts are the result of an int instruction in an executed program it may be assumed as a programmer triggered
external hardware-interruptsexternal hardware-interrupts are generated by controllers of external devices or coprocessors and are connected to the
internal hardware-interruptsinternal hardware-interrupts are the outcome of sure situations that occur during the execution of a program for example
interruptwhen the cpu detects an interrupt signal it stops activity of current and jumps to a special routine known an interrupt handler this handler
display control8279 provides a 16 byte display memory and refresh logic every address in the display memory
hand shaking handshaking or 2-way handshaking is 1 type of strobe operation it typically involves 2 handshaking lines an output line to denote when
port mapped io or io mapped ioio devices are mapped into a separate address space this is generally accomplished by having a different set of signal
memory mapped iomemory io devices are mapped into the system memory map with rom and ram to access a hardware device simply write or read
physical memory mapped io and port io cpu controlled io comes in 2 ways simply the difference is whether we utilize the normal memory addresses for
io interfaceio devices such as displays and keyboards establish communication of computer with outside world devices may be interfaced in
cache controllerthe cache controller is the mind of the cache its responsibilities include performing the snarfs and snoops updating
cache componentsthe cache sub-system may be divided into 3 functional blocks tag ram sram and thecache controller in real designs these blocks can be
write policya write policy determines how the cache deals with a write cycle the 2 common write policies arewrite-throughand write-back in write-back