1991/1005/pc/devfloppy.c (diff list | history)

1991/1005/sys/src/9/pc/devfloppy.c:175,180 – 1991/1006/sys/src/9/pc/devfloppy.c:175,181 (short | long | prev | next)
1991/0924		static int floppysense(void); static void floppywait(void);
1991/0802		static long floppyxfer(Drive*, int, void*, long, long);
1991/1006		static long floppythrice(Drive*, int, void*, long, long);
1991/0924		static int cmddone(void*); void Xdelay(int);
1991/0731
1991/1005/sys/src/9/pc/devfloppy.c:387,393 – 1991/1006/sys/src/9/pc/devfloppy.c:388,394
1991/0809		*/
1991/0924		if(dp->ccyl!=cyl || dp->chead!=head){
1991/0809		dp->ccyl = -1;
1991/0924		i = floppyxfer(dp, Fread, dp->cache,
1991/1006		i = floppythrice(dp, Fread, dp->cache,
1991/0924		(cyl*dp->t->heads+head)*nn, nn); if(i != nn){ if(i == 0)
1991/1005/sys/src/9/pc/devfloppy.c:420,426 – 1991/1006/sys/src/9/pc/devfloppy.c:421,426
1991/0731		long rv, i;
1991/0924		char *aa = a; int dev;
1991/0927		extern void vgaset(char*);
1991/0731
1991/0802		rv = 0;
1991/0924		dp = &fl.d[c->qid.path & ~Qmask];
1991/1005/sys/src/9/pc/devfloppy.c:438,447 – 1991/1006/sys/src/9/pc/devfloppy.c:438,449
1991/0924		floppypos(dp, c->offset+rv); if(dp->tcyl == dp->ccyl) dp->ccyl = -1; i = floppyxfer(dp, Fwrite, aa+rv, c->offset+rv,
1991/1006		i = floppythrice(dp, Fwrite, aa+rv, c->offset+rv,
1991/0924		n-rv);
1991/0802		if(i <= 0)
1991/1006		if(i < 0)
1991/0802		break;
1991/1006		if(i == 0) error(Eio);
1991/0802		}
1991/0925		qunlock(&fl); poperror();
1991/1005/sys/src/9/pc/devfloppy.c:453,460 – 1991/1006/sys/src/9/pc/devfloppy.c:455,460
1991/0924		} else if(SNCMP(aa, "reset") == 0){
1991/0925		fl.confused = 1;
1991/0924		floppyon(dp);
1991/0927		} else if(SNCMP(aa, "v") == 0){ vgaset(aa+1);
1991/0924		}
1991/0925		qunlock(&fl);
1991/0924		break;
1991/1005/sys/src/9/pc/devfloppy.c:755,761 – 1991/1006/sys/src/9/pc/devfloppy.c:755,782
1991/0802		return dp->cyl;
1991/0727		}
1991/1006		/* * since floppies are so flakey, try 3 times before giving up */
1991/0731		static long
1991/1006		floppythrice(Drive *dp, int cmd, void *a, long off, long n) { int tries; long rv; for(tries = 0; ; tries++){ if(waserror()){ if(strcmp(u->error, errstrtab[Eintr])==0 || tries > 3) nexterror(); } else { rv = floppyxfer(dp, cmd, a, off, n); poperror(); return rv; } } } static long
1991/0802		floppyxfer(Drive *dp, int cmd, void *a, long off, long n)
1991/0727		{ long offset;
1991/1005/sys/src/9/pc/devfloppy.c:830,837 – 1991/1006/sys/src/9/pc/devfloppy.c:851,856
1991/0924		offset = offset*dp->t->sectors + fl.stat[5] - 1; offset = offset * c2b[fl.stat[6]];
1991/0802		if(offset != off+dp->len){
1991/0924		print("new offset %d instead of %d\n", offset, off+dp->len);
1991/0925		print(" %d %d %d\n", fl.stat[3], fl.stat[4], fl.stat[5]);
1991/0727		dp->confused = 1;
1991/0731		errors("floppy drive lost");
1991/0727		}