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/* file: main.c
*
* This file contains the function main
* for the MPX Operating System - this is where
* the program's execution begins
*/
#include <stdio.h>
#include <dos.h>
#include "mpx.h"
pcb * pcb_list;
pcb * ready_queue_locked;
pcb * io_init_queue;
pcb * cop;
pcb pcb0;
pcb pcb1;
pcb pcb2;
pcb pcb3;
pcb pcb4;
pcb pcb5;
pcb pcb6;
pcb pcb7;
pcb pcb8;
pcb pcb9;
pcb pcb10;
pcb pcb11;
dcb com;
dcb prt;
dcb con;
int com_eflag;
int con_eflag;
int prt_eflag;
unsigned sys_stack[STACK_SIZE];
int main(void) {
pcb * pcb_addr;
int rc;
dcb * d = &con;//test
char *args[] = {"load", "idle"};
printf("Booting MPX... \n");
sys_init();
if (DEBUG_PRINTS) printf("did init \n");
d->event_flag = &con_eflag;
if (DEBUG_PRINTS) printf("making chain \n");
// create the chain
pcb0.chain = &pcb1;
pcb1.chain = &pcb2;
pcb2.chain = &pcb3;
pcb3.chain = &pcb4;
pcb4.chain = &pcb5;
pcb5.chain = &pcb6;
pcb6.chain = &pcb7;
pcb7.chain = &pcb8;
pcb8.chain = &pcb9;
pcb9.chain = &pcb10;
pcb10.chain = &pcb11;
pcb11.chain = NULL;
if (DEBUG_PRINTS) printf("building pcbs \n");
build_pcb(&pcb0, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb1, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb2, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb3, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb4, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb5, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb6, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb7, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb8, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb9, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb10, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
build_pcb(&pcb11, " ", FREE, -1, -1, 0, NULL, NULL, NULL, NULL);
pcb_list = &pcb0;
// initialize the currently running process
cop = NULL;
// set up command handler as a PCB
pcb_addr = get_pcb(pcb_list);
rc = build_pcb(pcb_addr, "ComHan", SYS_PROCESS, READY, NOT_SUSPENDED, 127, _CS,
(unsigned)comhan, _DS, 0x200);
disable();
insert_pcb(&ready_queue_locked, pcb_addr, 0);
enable();
if (DEBUG_PRINTS) printf("comhan in queue \n");
// set up idle process
cmd_load(args);
if (DEBUG_PRINTS) printf("loaded \n");
// update priority for idle process
// we can't do this when initially calling because of
// APP_PROCESS type priority validation
pcb_addr = search_pcb(&pcb_list, "idle");
pcb_addr->priority = -128;
pcb_addr->suspend = NOT_SUSPENDED;
pcb_addr->type = SYS_PROCESS;
if (DEBUG_PRINTS) printf("pri set \n");
// ALREADY IN QUEUE THANKS TO CMD_LOAD
//insert_pcb(&ready_queue, pcb_addr, 0);
if (DEBUG_PRINTS) printf("idle in queue \n");
dispatch();
sys_exit();
return 0;
}
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