void arch_pre_mm_init(void)
{
pm_init();
if (config.cpu_active == 1) {
interrupt_init();
bios_init();
/* PIC */
i8259_init();
}
}
void emu_init(int argc, char **argv)
{
char memory_file[1024];
FILE *fp;
if (argc == 2) {
strcpy(memory_file, argv[1]);
} else {
strcpy(memory_file, "memory/start.bin");
}
/* Load the memory */
fp = fopen(memory_file, "rb");
if (fp == NULL) {
fprintf(stderr, "[EMU] Failed to load memory file '%s'\n", memory_file);
exit(1);
}
{
/* Check the header */
uint8 values[5];
fread(values, sizeof(uint8), 5, fp);
if (values[0] != 'E' || values[1] != 'M' || values[2] != 'U' || values[3] != 0x17) {
fprintf(stderr, "[EMU] Not a valid memory file\n");
exit(1);
}
if (values[4] != 4) {
fprintf(stderr, "[EMU] Memory file is of wrong version and can't be loaded\n");
exit(1);
}
}
{
/* Load the registers */
uint16 values[20];
fread(values, sizeof(uint16), 20, fp);
emu_cs = values[0];
emu_ip = values[1];
emu_ax = values[2];
emu_bx = values[3];
emu_cx = values[4];
emu_dx = values[5];
emu_si = values[6];
emu_di = values[7];
emu_bp = values[8];
emu_sp = values[9];
emu_ds = values[10];
emu_es = values[11];
emu_ss = values[12];
emu_flags_all = values[13];
emu_deep = values[14];
emu_last_cs = values[15];
emu_last_ip = values[16];
emu_last_crc = values[17];
emu_last_length = values[18];
emu_overlay = (uint8)values[19];
}
/* Load the memory */
fread(emu_memory, 1024 * 1024, 1, fp);
/* Correct for the type we emulate */
#if EMULATE_386
emu_flags.iopl = 3;
emu_flags.nt = 1;
emu_flags.res4 = 0;
#elif EMULATE_286
emu_flags.iopl = 0;
emu_flags.nt = 0;
emu_flags.res4 = 0;
#else
emu_flags.iopl = 3;
emu_flags.nt = 1;
emu_flags.res4 = 1;
#endif
emu_flags.res1 = 1;
bios_init();
}
int init_module(void)
{
return bios_init();
}
void biosmain(void)
{
BOOL show_initinfo; /* TRUE if welcome screen must be displayed */
BYTE *p;
bios_init(); /* Initialize the BIOS */
trap1( 0x30 ); /* initial test, if BDOS works: Sversion() */
if (!HAS_RTC)
trap1( 0x2b, os_dosdate); /* set initial date in GEMDOS format: Tsetdate() */
/* Steem needs this to initialize its GEMDOS hard disk emulation.
* This may change drvbits. See Steem sources:
* File steem/code/emulator.cpp, function intercept_bios(). */
Drvmap();
/*
* if it's not the first boot, we use the existing bootdev.
* this allows a boot device that was selected via the welcome
* screen to persist across warm boots.
*/
if (first_boot)
bootdev = blkdev_avail(DEFAULT_BOOTDEV) ? DEFAULT_BOOTDEV : FLOPPY_BOOTDEV;
#if INITINFO_DURATION == 0
show_initinfo = FALSE;
#elif ALWAYS_SHOW_INITINFO
show_initinfo = TRUE;
#else
show_initinfo = first_boot;
#endif
if (show_initinfo)
bootdev = initinfo(); /* show the welcome screen */
KDEBUG(("bootdev = %d\n", bootdev));
/* boot eventually from a block device (floppy or harddisk) */
blkdev_boot();
defdrv = bootdev;
trap1( 0x0e , defdrv ); /* Set boot drive: Dsetdrv(defdrv) */
#if ENABLE_RESET_RESIDENT
run_reset_resident(); /* see comments above */
#endif
/*
* build default environment, just a PATH= string
*/
strcpy(default_env,PATH_ENV);
p = default_env + sizeof(PATH_ENV); /* point to first byte of path string */
strcpy(p,DEF_PATH);
*p = 'A' + defdrv; /* fix up drive letter */
p += sizeof(DEF_PATH);
*p = '\0'; /* terminate with double nul */
#if WITH_CLI
if (early_cli) { /* run an early console */
PD *pd = (PD *) trap1_pexec(PE_BASEPAGE, "", "", default_env);
pd->p_tbase = (LONG) coma_start;
pd->p_tlen = pd->p_dlen = pd->p_blen = 0;
trap1_pexec(PE_GOTHENFREE, "", pd, "");
}
#endif
autoexec(); /* autoexec PRGs from AUTO folder */
/* clear commandline */
if(cmdload != 0) {
/* Pexec a program called COMMAND.PRG */
trap1_pexec(PE_LOADGO, "COMMAND.PRG", "", default_env);
} else if (exec_os) {
/* start the default (ROM) shell */
PD *pd;
pd = (PD *) trap1_pexec(PE_BASEPAGE, "", "", default_env);
pd->p_tbase = (LONG) exec_os;
pd->p_tlen = pd->p_dlen = pd->p_blen = 0;
trap1_pexec(PE_GO, "", pd, "");
}
#if CONF_WITH_SHUTDOWN
/* try to shutdown the machine / close the emulator */
shutdown();
#endif
/* hide cursor */
cprintf("\033f");
kcprintf(_("System halted!\n"));
halt();
}
