Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

PPI / MPI - What are the real differences?

zaasmi Cyberian's last edited by | 0 PKR

Please explain?
Reply Quote 1
1 Reply Last reply
cyberian Cyberian's last edited by @zaasmi | 0 PKR

@zaasmi Programmable Peripheral Interface (PPI)
Reply Quote 0
1 Reply Last reply
zaasmi Cyberian's last edited by cyberian | 0 PKR

PPI Stands for?
Reply Quote 0
1 Reply Last reply
cyberian Cyberian's last edited by cyberian | 0 PKR

All protocols are RS485 based, so that’s why both could be done on single port, the other thing is that MPI is a derivate of DP, PPI is a simpler MPI protocol and made for Point-to-Point communication.

hope that will be helped, if you have still any questions, don’t hesitate to ask me.
Reply Quote 0
1 Reply Last reply

4
Posts

65
Views

Join Us Get Reward Earning!

Cyberian is not a free learning community! We provide to Members earning way with learning. How lets me explain check HERE. if you have any question please post in reply. Thanks!

Online Users

CS609 Handouts
CS609 - System Programming • • zaasmi

1

0
Votes

1
Posts

39
Views

No one has replied
CS609 Final Term Solved MCQ's & Quiz With Refernace Moaaz
CS609 - System Programming • cs609 final term moaaz mcqs & quiz • • zaasmi

3

0
Votes

3
Posts

56
Views

Question : 1 of 10 ( Marks: 1 ) - Please choose one 14h include __________ which is used to send a byte. ►Service #0 ►Service #1 (Page 121) ►Service #2 ►Service #3 Question : 2 of 10 ( Marks: 1 ) - Please choose one The status register _____ is the main control register. ►B (Page 146) ►A ►C ►D Question : 3 of 10 ( Marks: 1 ) - Please choose one _________ is used to identify the cause of interrupt. ►Interrupt ID Register (Page 116) ►PC Register ►AC Register ►None of All These 25 Question : 4 of 10 ( Marks: 1 ) - Please choose one In NTFS, up to ________ characters are used to store files names, ►30 ►48 ►255 (Page 283) ►510 Question : 5 of 10 ( Marks: 1 ) - Please choose one A cluster is a collection of contiguous _______. ►Blocks (Page 242) ►Sectors ►Bytes ►None of Given Question : 6 of 10 ( Marks: 1 ) - Please choose one In BPB, root directory is saved in _________. ►Cluster#0 ►Cluster#1 ►Cluster#2 ►Cluster#3 Question : 7 of 10 ( Marks: 1 ) - Please choose one In NTFS, total sizes of MFT entries are _______. ►16-bytes (Page 303) ►20-bytes ►26-bytes ►32-bytes Question : 8 of 10 ( Marks: 1 ) - Please choose one In NTFS, _______ store the contents of file. ►Both small & large file Record ►Small record ►Large Record ►None of given 26 Question : 9 of 10 ( Marks: 1 ) - Please choose one In NTFS, contents and indexed of file is stored in _____. ►Small record ►Large Record ►Both small & large file Record ►None of given Question : 10 of 10 ( Marks: 1 ) - Please choose one Total No. of bytes that can be stored in Keyboard Buffer is. ►16 ►32 (Page 54) ►64 ►128 Question : 1 of 10 ( Marks: 1 ) - Please choose one BIOS support _____________UARTS as COM ports. ►6 ►4 (Page 113) ►3 ►2 Question : 2 of 10 ( Marks: 1 ) - Please choose one DCE stands for __________. ►Data communication equipment (Page 109) ►Distributed Computing Environment ►Data Communications Equipment ►Data Carrier Equipment Question : 3 of 10 ( Marks: 1 ) - Please choose one In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles ►1 ►2 ►4 ► 16 (Page 69) 27 Question : 4 of 10 ( Marks: 1 ) - Please choose one In ____________each byte is needed to be encapsulated in start and end. ►Synchronous communication ►Asynchronous communication (Page 106) ►Both ►None of given Question : 5 of 10 ( Marks: 1 ) - Please choose one The ______ service # is not used in any interrupt. ►01 ►02 ►03 ►FF Question : 6 of 10 ( Marks: 1 ) - Please choose one If we want to send printing on the printer then we have to perform following steps. ►Initialize printer ►Read Status ►Check Error ►All of the given Question : 7 of 10 ( Marks: 1 ) - Please choose one DTE is ____________. ►Data terminal equipment (Page 109) ►Data transmitting equipment ►Dual terminal equipment ►None of the given. Question : 8 of 10 ( Marks: 1 ) - Please choose one If printer is _____ then printer sends back the ACK signal to the printer interface ►idle (Page 97) ►busy ►Out of paper ►None of the given 28 Question : 9 of 10 ( Marks: 1 ) - Please choose one DSR stands for __________ . ►Data set ready (Page 111) ►Data service ready ►Data stock ready ►None of the given Question : 10 of 10 ( Marks: 1 ) - Please choose one At IRQ 7 Interrupt # ___ is used. ► 0x0A ►0x0B ► 0x0C ►0x0F (Page 95) Question : 1 of 10 ( Marks: 1 ) - Please choose one The memory addresses of COM ports remain same for all computers ►True ►False Question : 2 of 10 ( Marks: 1 ) - Please choose one In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017); ►if (((*scr)&12)==12) ►if (((*scr)&8)==8) ►if (((*scr)&4)==4) ►if (((*scr)&2)==2) Question : 3 of 10 ( Marks: 1 ) - Please choose one In case of synchronous communication a timing signal is required to identify the start and end of a bit. ►True (Page 105) ►False Question : 4 of 10 ( Marks: 1 ) - Please choose one The baud rate is set in accordance with the divisor value loaded within the UART internal registers base +0 and base +1. ►TRUE (Page 114) ►FALSE 29 Question : 5 of 10 ( Marks: 1 ) - Please choose one Software based flow control make use of -------- control characters ►Xon ►XOFF ►Both (Page 135) ►None Question : 6 of 10 ( Marks: 1 ) - Please choose one ------------ is used to read time from RTC ►1A\02H (Page 137) ►1A\03H ►1A\04H ►1A\05H Question : 7 of 10 ( Marks: 1 ) - Please choose one Int_____________ service 0 can be used to set the line parameter of the UART or COM port. ►14H (Page 119) ►15H ►13H ►None of the given option Question : 8 of 10 ( Marks: 1 ) - Please choose one When LBA is equal to zero (0), it means ________. ►First block of the disk (Page 240) ►First block of the logical drive ►First block of the hidden block ►None of the given Question : 9 of 10 ( Marks: 1 ) - Please choose one In IRQ2 and IRQ3 which one has the highest priority? ►Can’t be determined ►Both have same priority ►IRQ3 ►IRQ2 (Page 47) 30 Question : 10 of 10 ( Marks: 1 ) - Please choose one Following is not a method of I/O ►Programmed I/O ► Interrupt driven I/O ►Hardware Based I/O (Page 4) ►None of given Question : 1 of 10 ( Marks: 1 ) - Please choose one It is possible to perform I/O operations from three different methods. ►True (Page 7) ►False Question : 2 of 10 ( Marks: 1 ) - Please choose one The Function of I/O controller is to provide ____________. ►I/O control signals ►Buffering ►Error Correction and Detection ►All of given (Page 5) Question : 3 of 10 ( Marks: 1 ) - Please choose one Which of the following are types of ISR __________. ►BIOS (Basic I/O service ) ISR ►DOS ISR ►ISR provided by third party device drivers ►All of the given (Page 13) Question : 4 of 10 ( Marks: 1 ) - Please choose one Interrupt service number is usually placed in ____________ register. ►CH ►CL ►AH (Page 26) ►AL 31 Question : 5 of 10 ( Marks: 1 ) - Please choose one NMI Stand for ►Non Maskable Interrupt (Page 46) ►Non Multitude Interrupt ►Non Maskable Instruction ►None of Given Question : 6 of 10 ( Marks: 1 ) - Please choose one A single interrupt controller can arbitrate among ____ different devices. ►4 ► 6 ►8 (Page 47) ►10 Question : 7 of 10 ( Marks: 1 ) - Please choose one The microprocessor package has many signals for data. Below are some incorrect priority order (Higher to Lower). ►Reset,Hold,NMI,INTR (Page 46) ►NMI, INTR,Hold,Reset ►INTR,NMI,Reset,Hold ►None of the Given Question : 8 of 10 ( Marks: 1 ) - Please choose one The following command “outportb (0x61,inportb(0x61) & 0xFC);” will ►Turn on the speaker ►Turn off the speaker (Page 75) ►Toggle the speaker ►None of the given Question : 9 of 10 ( Marks: 1 ) - Please choose one The following command “outportb (0x61,inportb(0x61) | 3);” will ________ . ►Turn on the speaker (Page 74) ►Turn off the speaker ►Toggle the speaker ►None of the above 32 Question : 10 of 10 ( Marks: 1 ) - Please choose one The PPI acts as an interface between the CPU and a parallel ________ . ►I/O device (Page 83) ►CPU ►BUS ►None of Given Question : 1 of 10 ( Marks: 1 ) - Please choose one BIOS DO NOT support ______. ►LPT1 ►LPT2 ►LPT3 ►LPT4 (Page 91) Question : 2 of 10 ( Marks: 1 ) - Please choose one _____ bit is cleared to indicate the low nibble is being sent. ►D1 ►D2 ►D3 ►D4 (Page 104) Question : 3 of 10 ( Marks: 1 ) - Please choose one The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register. ►1 ►3 ►5 ►7 (Page 114) Question : 4 of 10 ( Marks: 1 ) - Please choose one ___________ file system is used in NTFS based systems. Contiguous Chained Indexed None of the given 33 Question : 5 of 10 ( Marks: 1 ) - Please choose one Communication between keyboard and keyboard controller is __________. ►Asynchronous serial ►Synchronous serial (P 77) ►Parallel communication ►None of the given Question : 6 of 10 ( Marks: 1 ) - Please choose one In NTFS, boot sector is stored at ►First and 6th sector ►First and Last sector ►Only at Last sector ►Only at First sector Question : 7 of 10 ( Marks: 1 ) - Please choose one Standard PC operates in two modes in terms of memory which are ►Real mode and Extended Mode ►Base mode and Memory Mode ►None of the given ►Real mode and protected mode (Page 6) Question : 8 of 10 ( Marks: 1 ) - Please choose one IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine. ►2 ►4 (Page 20) ►8 ►16 Question : 9 of 10 ( Marks: 1 ) - Please choose one Each paragraph in keep function is ____ bytes in size. ►4 ►8 ►16 (Page 24) ►32 34 Question : 10 of 10 ( Marks: 1 ) - Please choose one A software interrupt does not require EOI (End of interrupt). ►True (Page 49) ►False Question : 1 of 10 ( Marks: 1 ) - Please choose one To store each character in keyboard buffer ____ bytes are required. ►2 (Page 54) ►4 ►6 ►8 Question : 2 of 10 ( Marks: 1 ) - Please choose one Interrupt _____ is empty; we can use its vector as a flag. ►9H ►13H ►15H ►65H (Page 65) Question : 3 of 10 ( Marks: 1 ) - Please choose one Command register is an _____ bit register ►4 ►8 (Page 71) ►16 ►32 Question : 4 of 10 ( Marks: 1 ) - Please choose one How many bytes can be used to store a file name in NTFS? ►128 ►255 ►510 ►1024 Question : 5 of 10 ( Marks: 1 ) - Please choose one ____ is the first logical sector of NTFS partition. ►DPB ►MFT ►Boot sector ►None 35 Question : 6 of 10 ( Marks: 1 ) - Please choose one In boot block BIOS parameter block starts from 03H ►05H ►08H ►0BH (Page 302) Question : 7 of 10 ( Marks: 1 ) - Please choose one IN NTFS, FAT and root directory is replaced by ►FCB ►MFT (Page 301) ►Hidden blocks ►Boot sector Question : 8 of 10 ( Marks: 1 ) - Please choose one Block # 2 is the safest block to store the backup of boot block. ►True ►False Question : 2 of 10 ( Marks: 1 ) - Please choose one The keyboards interface as discussed earlier uses the IRQ0 and the port 64H as data port. ►True ► False Question : 3 of 10 ( Marks: 1 ) - Please choose one FAT12 will have 12-bit wide entries and can have 2^12=4096 entries maximum ►True ► False Question : 4 of 10 ( Marks: 1 ) - Please choose one In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port. ►8, 0x21 ►16, 0x42 ►32, 0x22 ►64, 0x32 36 Some More MCQs and Quizzes Question : 1 of 10 ( Marks: 1 ) - Please choose one DMA stands for_________ ►Direct Memory Access (Page 4) ►Distinct Memory Access ►Direct Module Access ►Direct Memory Allocation Question : 2 of 10 ( Marks: 1 ) - Please choose one UART stands for_______ ►Universal Asynchronous Receiver Transmitter (Page 107) ►Universal Adjustment and Realigning Tool ►Unconventional Assisted Recovery Team ►None of these Question : 3 of 10 ( Marks: 1 ) - Please choose one Interrupt Vector Table (IVT) in short is a _______ bytes sized table. ►1024 (Page 10) ►2048 ►3072 ►4096 Question : 4 of 10 ( Marks: 1 ) - Please choose one Hardware Interrupts are __________. ►Preemptive ►Non-Preemptive (Page 48) ►Both Preemptive and Non-Preemptive ►None of Given Question : 5 of 10 ( Marks: 1 ) - Please choose one Timer interrupt is a ___. ►Hardware Interrupt (Page 28) ►Software Interrupt ►Both of these ►None of These 37 Question : 6 of 10 ( Marks: 1 ) - Please choose one The keyboard makes use of interrupt number _______ for its input operations. ►9 (Page 34) ►10 ►11 ►12 Question : 7 of 10 ( Marks: 1 ) - Please choose one Register can be used to divide frequency is _________ ►Counter Register (Page 69) ►Accumulator Register ►None of these Question : 8 of 10 ( Marks: 1 ) - Please choose one Which port is known as Data Port ►60H (Page 177) ►61H ►64H ►69H Question : 9 of 10 ( Marks: 1 ) - Please choose one LPTs can be swapped. ►True (Page 92) ►False Question : 10 of 10 ( Marks: 1 ) - Please choose one PPI is used to perform parallel communication ►True (Page 81) ►False Question : 1 of 10 ( Marks: 1 ) - Please choose one __________is used to control the printer via the BIOS ►Int 16H ►Int 17H (Page 84) ►Int 18H ►Int 19H 38 Question : 2 of 10 ( Marks: 1 ) - Please choose one There are two main types of interrupts namely _________________. ►PC based and Window based ►Hardware based and Kernal based ►Hardware interrupts and Software interrupts (Page 10) ►None of the given Question : 3 of 10 ( Marks: 1 ) - Please choose one To set the interrupt vector means is to change the double word sized interrupt vector within the IVT. ►True (Page 22) ►False Question : 4 of 10 ( Marks: 1 ) - Please choose one The service number is usually placed in the ________ register. ►AL ►CL ►AH (Page 26) ►AX Question : 5 of 10 ( Marks: 1 ) - Please choose one The keyboard makes use of interrupt number _______ for its input operations. ► 9 (Page 34) ►10 ►11 ►12 Question : 6 of 10 ( Marks: 1 ) - Please choose one The service _________ is called the keyboard hook service. ►15H/2FH ►15H/4FH (Page 44) ►15H/FFH Question : 7 of 10 ( Marks: 1 ) - Please choose one The BIOS interrupt ________ can be used to configure RTC. ►1AH (Page 136) ►2AH ►3AH ►4AH 39 Question : 8 of 10 ( Marks: 1 ) - Please choose one PPI stands for ►Parallel Programmable interface ►Peripheral Programmable interface (Page 76) ►Port Programmable interface ►None of the given Question : 9 of 10 ( Marks: 1 ) - Please choose one Int ________ is used to control the printer via the BIOS. ►17H (Page 84) ►18H ►20H ►21H Question : 10 of 10 ( Marks: 1 ) - Please choose one Counter register can be used to divide clock signal. ►True (Page 69) ►False Question : 1 of 10 ( Marks: 1 ) - Please choose one The bit number _______ of the coprocessor control word is the interrupt enable flag. ►7 (Page 168) ►8 ►9 ►6 Question : 2 of 10 ( Marks: 1 ) - Please choose one There are __________ kinds of serial communication. ►2 (Page 105) ►3 ►4 ►5 Question : 3 of 10 ( Marks: 1 ) - Please choose one ________ store the base address for LPT1. ►40:00H ►40:02H ►40:08H (Page 92) ►40:1AH 40 Question : 4 of 10 ( Marks: 1 ) - Please choose one The amount of memory above conventional memory (extended memory) can be determined using the service _______. ►15H/88H (Page 162) ►16H/88H ►17H/88H ►21H/88H Question : 5 of 10 ( Marks: 1 ) - Please choose one The output on the monitor is controlled by a controller called __________within the PC. ►Video controller (Page 30) ►Bus controller ►Ram controller ►None of the given Question : 6 of 10 ( Marks: 1 ) - Please choose one Interrupt 9 usually reads the _________ from keyboard. ►ASCII code ►Scan code (Page 34) ►Both ASCII and Scan code ►None of the above Question : 7 of 10 ( Marks: 1 ) - Please choose one NMI Stand for ►Non Maskable Interrupt (Page 46) ►Non Multitude Interrupt ►Non Maskable Instruction ►None of Given Question : 8 of 10 ( Marks: 1 ) - Please choose one A single interrupt controller can arbitrate among ____ different devices. ►4 ►6 ►8 (Page 47) ►10 41 Question : 9 of 10 ( Marks: 1 ) - Please choose one The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower). ►Reset,Hold,NMI,INTR (Page 46) ►NMI, INTR,Hold,Reset ►INTR,NMI,Reset,Hold ►None of the Given Question : 10 of 10 ( Marks: 1 ) - Please choose one The ________function initialize the COM port whose number is passed as parameter using BIOS services. ►Initializecom() ►Initialize() (Page 125) ►Recievechar() ►None of these option Question : 1 of 10 ( Marks: 1 ) - Please choose one There are two type of communication synchronous and Anti Synchronous ►True ►False (Page 105) Question : 2 of 10 ( Marks: 1 ) - Please choose one REGS is a Union ►True ►False Question : 3 of 10 ( Marks: 1 ) - Please choose one Keyboard Status Byte is located at the address ► 0040:0000H ► 0040:0013H ► 0040:0015H ► 0040:0017H (Page 29) Question : 4 of 10 ( Marks: 1 ) - Please choose one If we use keep (0, 1000) in a TSR program, the memory allocated to it is ► 64000 bytes ► 32000 bytes ► 16000 bytes ► 80000 bytes 42 Question : 5 of 10 ( Marks: 1 ) - Please choose one Maximum number of interrupts in a standard PC is ► 64 ► 128 ► 256 (Page 10) ► 512 Question : 6 of 10 ( Marks: 1 ) - Please choose one The -------- function receive a byte and COM port number is passed as parameter using BIOS service ►Receivebyte (); ►Receive (); ►Receivechar (); (Page 125) ►None of the given option Question : 7 of 10 ( Marks: 1 ) - Please choose one ------------ whenever receive indicates the start of communication ………… whenever receive indicates the end of communication ►XON\XOFF (Page 135) ►XOFF\XON ►XON\YOFF ►YON\XOFF Question : 8 of 10 ( Marks: 1 ) - Please choose one ------------ is used to set time from RTC ►1A\02H ►1A\03H (Page 138) ►1A\04H ►1A\05H Question : 9 of 10 ( Marks: 1 ) - Please choose one Set the Interrupt vector means to change the double word sized interrupt vector within IVT. ►True (Page 22) ►False Question : 10 of 10 ( Marks: 1 ) - Please choose one If keyboard buffer is empty the head and tail points at the same location. ►True (Page 55) ►False 43 Question : 1 of 10 ( Marks: 1 ) - Please choose one Standard PC can have _____ PPI. ►1 ►4 (Page 84) ►8 ►16 Question : 2 of 10 ( Marks: 1 ) - Please choose one By cascading two DMAs ____ bits can be transferred. ►4 ►8 ►16 (Page 186) ►32 Question : 3 of 10 ( Marks: 1 ) - Please choose one PPI interconnection _______ bits is cleared to indicate low nibble is being sent. ►D1 ►D2 ► D3 ► D4 (Page 101) Question : 4 of 10 ( Marks: 1 ) - Please choose one Display device (Monitor) performs _________ I/O. ►memory mapped (Page 30) ►Isolated ►Both of above ►None of these Question : 5 of 10 ( Marks: 1 ) - Please choose one Timer interrupt occurs _______ times every second by means of hardware. ►18.2 (Page 28) ►16.2 ►15.2 ►14.2 Question : 6 of 10 ( Marks: 1 ) - Please choose one An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O. ►True (Page 83) ►False 44 Question : 7 of 10 ( Marks: 1 ) - Please choose one Tail of keyboard should get to get the start of buffer. ►True (Page 55) ►False Question : 8 of 10 ( Marks: 1 ) - Please choose one ____ No. of bytes are used to store the character in the keyboard buffer. ► 1 ►2 (Page 54) ►4 ► 8 Question : 9 of 10 ( Marks: 1 ) - Please choose one We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line. ►0xf ,IRQ 7 ► 0xa, IRQ 6 ► 0x8, IRQ 5 ►0x6, IRQ 2 Question : 10 of 10 ( Marks: 1 ) - Please choose one If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____. ►high, 0x42 ►low, 0x22 ►high, 0x22 ►low, 0x42
SOLVED CS609 GDB1 Solution and discussion
CS609 - System Programming • solution discussion spring 2019 gdb no.1 cs609 • • zaasmi

2

0
Votes

2
Posts

72
Views

M

@zaasmi said in CS609 GDB1 Solution and discussion: By increasing the surface area of hard disk there is an increase of data storage. Do you think whether there is any negative impact of increasing surface area as well? Yes, by increasing the surface area of hard disk there is an increase of data storage negative impact of increasing surface area as well As a greater amount of magnetic media can reside on the hard surface of the disk also because the surface area of the disk is increased by increasing the number of platters. Increasing the surface area clearly increases the amount of data that can reside on the disk as more magnetic media no resides on disk but it might have some drawbacks like increased seek time in case only one disk platter is being used.
SOLVED The memory addresses of COM ports remain same for all computers
CS609 - System Programming • • cyberian

2

0
Votes

2
Posts

187
Views

M

yes its true the memory addresses of COM ports remain same for all computers
UNSOLVED CS609 GDB.1 Solution and Discussion
CS609 - System Programming • solution gdb no.1 cs609 • • zaasmi

1

0
Votes

1
Posts

177
Views

No one has replied
SOLVED CS609 Assignment No. 03 Solution and Discussion
CS609 - System Programming • solution discussion spring 2019 cs609 assignment • • zaasmi

4

0
Votes

4
Posts

311
Views

@moaaz Another Idea solution #include <bios.h> #include <dos.h> FILE *fp; unsigned char buf[1024]; unsigned char st[60]; unsigned char headno[10]; unsigned char secno[10]; unsigned char trackno[10]; void main (void) { int i; for (i=0; i<1024; i++) buf[i]=0; gets(st); fp=fopeon(st,”wb”); printf(“Head”); gets(headno); puts(headno); printf(“/nsector ”); gets(secno); puts(secno); printf(“/ntrack ”); gets(trackno); puts(trackno); i = biosdisk(2, 0x80, atoi(headno), atoi(trackno), atoi(trackno), 2,buf); } if(*(((char *)(&i))+1)= =0) { fwrite(buf,2,1024,fp); fclose(fp); } else { printf(“Cannot Read Error# = %x” i); }
CS609: System Programming Graded Assignment No. 02 Solution and Discussion
CS609 - System Programming • • zaasmi

4

0
Votes

4
Posts

112
Views

M

@zaasmi CS609 Correct Solution: #include<conio.h> #include<BIOS.H> #include<stdio.h> #include<DOS.H> void interrupt (*oldTimer)(void); // To store current Timer vector void interrupt (*oldKey)(void);// To store current KeyVector void interrupt newTimer(); //New Timer Function void interrupt newKey(); //New Key Function char far *scr= (char far *)0xBS090200381; //Screen segment int i, t=0,m=0; char charscr[4000]; //Character Array void main() { clrscr(); for(i=0;i<4000;i++) *(scr+i)=0x41; // Displaying A on whole screen oldTimer=getvect(8); oldKey=getvect(9); setvect(8,newTimer); setvect(9,newKey); getch(); } void interrupt newTimer() { t++; if((t>=90) && (m==0)) { for(i=0;i<4000;i++) charscr[i]=*(scr+i); //Storing all characters in array for(i=0;i<4000;i+=2) { *(scr+i)=0x20; // Blank screen *(scr+i+1)=0x07; } t=0; m=1; } (*oldTimer)(); } void interrupt newKey() {int w; if (m==1) { for(w=0;w<4000;w++) *(scr+w)=charscr[w]; // Recovering all characters on screen. m=0;} (*oldKey)(); }

| |

1 / 1

PPI / MPI - What are the real differences?

Join Us Get Reward Earning!

Online Users

CS609 Handouts CS609 - System Programming • • zaasmi

CS609 Final Term Solved MCQ's & Quiz With Refernace Moaaz CS609 - System Programming • cs609 final term moaaz mcqs & quiz • • zaasmi

SOLVED CS609 GDB1 Solution and discussion CS609 - System Programming • solution discussion spring 2019 gdb no.1 cs609 • • zaasmi

SOLVED The memory addresses of COM ports remain same for all computers CS609 - System Programming • • cyberian

UNSOLVED CS609 GDB.1 Solution and Discussion CS609 - System Programming • solution gdb no.1 cs609 • • zaasmi

SOLVED CS609 Assignment No. 03 Solution and Discussion CS609 - System Programming • solution discussion spring 2019 cs609 assignment • • zaasmi

CS609: System Programming Graded Assignment No. 02 Solution and Discussion CS609 - System Programming • • zaasmi

CS609 Handouts
CS609 - System Programming • • zaasmi

CS609 Final Term Solved MCQ's & Quiz With Refernace Moaaz
CS609 - System Programming • cs609 final term moaaz mcqs & quiz • • zaasmi

SOLVED CS609 GDB1 Solution and discussion
CS609 - System Programming • solution discussion spring 2019 gdb no.1 cs609 • • zaasmi

SOLVED The memory addresses of COM ports remain same for all computers
CS609 - System Programming • • cyberian

UNSOLVED CS609 GDB.1 Solution and Discussion
CS609 - System Programming • solution gdb no.1 cs609 • • zaasmi

SOLVED CS609 Assignment No. 03 Solution and Discussion
CS609 - System Programming • solution discussion spring 2019 cs609 assignment • • zaasmi

CS609: System Programming Graded Assignment No. 02 Solution and Discussion
CS609 - System Programming • • zaasmi