void handleTimerInterrupt(int segment, int stackPointer){
struct PCB *pcb ;
struct PCB *head;
setKernelDataSegment();
pcb = getFreePCB();
if(pcb->state != DEFUNCT){
}
pcb->stackPointer = stackPointer;
pcb->state = READY;
addToReady(pcb);
head = removeFromReady();
restoreDataSegment();
setKernelDataSegment();
if(head == NULL){
head = idleProc;
}
head->state = RUNNING;
restoreDataSegment();
setKernelDataSegment();
running = head;
restoreDataSegment();
//printString("tic");
returnFromTimer(head->segment, head->stackPointer);
}
int executeProgram(char* name){
char buffer[13312];
int i;
int freeSegment;
int segment;
struct PCB *pcb;
setKernelDataSegment();
freeSegment = getFreeMemorySegment();
restoreDataSegment();
if(freeSegment == -1){
print("No Memory Available\0");
return -2;
}
// if(freeSegment == 0x0000 || freeSegment == 0x1000){
// print("Invalid Segment\0");
// return -1;
// }
interrupt(0x21, 0x03, name, buffer, 0);
if(buffer[0] == 0x00){
print("File not found\0");
return -1;
}
segment = 0x1000*(freeSegment+2);
for(i = 0;i<13312;i++){
putInMemory(segment, i, buffer[i]);
}
setKernelDataSegment();
pcb = getFreePCB();
restoreDataSegment();
if(pcb == NULL){
return -2;
}
kStrCopy(name,(*pcb).name, 6);
setKernelDataSegment();
(*pcb).segment = segment;
(*pcb).stackPointer = 0xFF00;
addToReady(pcb);
restoreDataSegment();
initializeProgram(segment);
return 1;
}
int executeProgram(char* name){
int i = 0;
int offset = 0x0000;
char buffer[512];
int sectors;
int segment;
struct PCB *pcb;
setKernelDataSegment();
pcb = getFreePCB();
restoreDataSegment();
setKernelDataSegment();
segment = getFreeMemorySegment()
restoreDataSegment();
if(segment == -1){
return -2;
}
sectors = readfile(name, buffer);
if(sectors == -1){
return -1;
}
for (i; i < sectors*512 ; i++) {
putInMemory(segment,offset,buffer[i]);
offset++;
}
// pcb->name[0] = name[0];
// pcb->name[1] = name[1];
// pcb->name[2] = name[2];
// pcb->name[3] = name[3];
// pcb->name[4] = name[4];
// pcb->name[5] = name[5];
kStrCopy(name, pcb->name, 6);
setKernelDataSegment();
pcb->state = STARTING;
pcb->segment = segment;
pcb->stackPointer = 0xFF00;
restoreDataSegment();
initializeProgram(segment);
return 1;
}
