/* precondition: current_disk < NUM_OF_DSK */
static void writebuf(void) {
int32 i, rtn;
UNIT *uptr;
i = current_byte[current_disk]; /* null-fill rest of sector if any */
while (i < DSK_SECTSIZE)
dskbuf[i++] = 0;
uptr = dsk_dev.units + current_disk;
if (((uptr -> flags) & UNIT_DSK_WLK) == 0) { /* write enabled */
TRACE_PRINT(WRITE_MSG, ("DSK%i: " ADDRESS_FORMAT " OUT 0x0a (WRITE) D%d T%d S%d" NLP, current_disk, PCX,
current_disk, current_track[current_disk], current_sector[current_disk]));
if (dskseek(uptr)) {
printf("DSK%i: " ADDRESS_FORMAT " fseek failed D%d T%d S%d" NLP, current_disk,
PCX, current_disk, current_track[current_disk], current_sector[current_disk]);
}
rtn = fwrite(dskbuf, DSK_SECTSIZE, 1, uptr -> fileref);
if (rtn != 1) {
printf("DSK%i: " ADDRESS_FORMAT " fwrite failed T%d S%d Return=%d" NLP, current_disk,
PCX, current_track[current_disk], current_sector[current_disk], rtn);
}
}
else if ( (dsk_dev.dctrl & VERBOSE_MSG) && (warnLock[current_disk] < warnLevelDSK) ) {
/* write locked - print warning message if required */
warnLock[current_disk]++;
/*05*/ printf("DSK%i: " ADDRESS_FORMAT " Attempt to write to locked DSK%d - ignored." NLP,
current_disk, PCX, current_disk);
}
current_flag[current_disk] &= 0xfe; /* ENWD off */
current_byte[current_disk] = 0xff;
dirty = FALSE;
}
int32 dsk12(const int32 port, const int32 io, const int32 data) {
int32 i, rtn;
UNIT *uptr;
if (current_disk >= NUM_OF_DSK) {
if ((dsk_dev.dctrl & VERBOSE_MSG) && (warnDSK12 < warnLevelDSK)) {
warnDSK12++;
sim_debug(VERBOSE_MSG, &dsk_dev,
"DSK%i: " ADDRESS_FORMAT
" Attempt of %s 0x0a on unattached disk - ignored.\n",
current_disk, PCX, selectInOut(io));
}
return 0;
}
/* now current_disk < NUM_OF_DSK */
in9_count = 0;
uptr = dsk_dev.units + current_disk;
if (io == 0) {
if (current_byte[current_disk] >= DSK_SECTSIZE) {
/* physically read the sector */
sim_debug(READ_MSG, &dsk_dev,
"DSK%i: " ADDRESS_FORMAT " IN 0x0a (READ) D%d T%d S%d\n",
current_disk, PCX, current_disk,
current_track[current_disk], current_sector[current_disk]);
for (i = 0; i < DSK_SECTSIZE; i++)
dskbuf[i] = 0;
if (dskseek(uptr)) {
if ((dsk_dev.dctrl & VERBOSE_MSG) && (warnDSK12 < warnLevelDSK)) {
warnDSK12++;
sim_debug(VERBOSE_MSG, &dsk_dev,
"DSK%i: " ADDRESS_FORMAT " fseek error D%d T%d S%d\n",
current_disk, PCX, current_disk,
current_track[current_disk], current_sector[current_disk]);
}
}
rtn = sim_fread(dskbuf, 1, DSK_SECTSIZE, uptr -> fileref);
if (rtn != DSK_SECTSIZE) {
if ((dsk_dev.dctrl & VERBOSE_MSG) && (warnDSK12 < warnLevelDSK)) {
warnDSK12++;
sim_debug(VERBOSE_MSG, &dsk_dev,
"DSK%i: " ADDRESS_FORMAT " sim_fread error D%d T%d S%d\n",
current_disk, PCX, current_disk,
current_track[current_disk], current_sector[current_disk]);
}
}
current_byte[current_disk] = 0;
}
return dskbuf[current_byte[current_disk]++] & 0xff;
}
else {
if (current_byte[current_disk] >= DSK_SECTSIZE)
writebuf(); /* from above we have that current_disk < NUM_OF_DSK */
else {
dirty = TRUE; /* this guarantees for the next call to writebuf that current_disk < NUM_OF_DSK */
dskbuf[current_byte[current_disk]++] = data & 0xff;
}
return 0; /* ignored since OUT */
}
}
