1991/0728/pc/devfloppy.c (diff list | history)

1991/0727/sys/src/9/pc/devfloppy.c:29,43 – 1991/0728/sys/src/9/pc/devfloppy.c:29,38 (short | long | prev | next)
1991/0727		Fwrite= 0x47, /* write cmd */ Fmulti= 0x80, /* or'd with Fread or Fwrite for multi-head */ DMAmode0= 0xb, DMAmode1= 0xc, DMAaddr= 0x4, DMAtop= 0x81, DMAinit= 0xa, DMAcount= 0x5,                  Nfloppy= 4, /* floppies/controller */
1991/0728		DMAchan= 2, /* floppy dma channel */
1991/0727		/* sector size encodings */ S128= 0, S256= 1,
1991/0727/sys/src/9/pc/devfloppy.c:48,53 – 1991/0728/sys/src/9/pc/devfloppy.c:43,53
1991/0727		Drivemask= 3<<0, Seekend= 1<<5, Codemask= (3<<6)|(3<<3),
1991/0728		/* file types */ Qdir= 0, Qdata= 16, Qstruct= 32,
1991/0727		}; /*
1991/0727/sys/src/9/pc/devfloppy.c:117,123 – 1991/0728/sys/src/9/pc/devfloppy.c:117,123
1991/0727		int confused; }; Controller floppy[1];
1991/0728		Controller floppy;
1991/0727		/* * start a floppy drive's motor. set an alarm for 1 second later to
1991/0727/sys/src/9/pc/devfloppy.c:151,158 – 1991/0728/sys/src/9/pc/devfloppy.c:151,156
1991/0727		{ int cmd; if(!canqlock(dp)) return; cmd = Fintena | Fena | dp->dev; outb(Fmotor, cmd); dp->motoron = 0;
1991/0727/sys/src/9/pc/devfloppy.c:162,175 – 1991/0728/sys/src/9/pc/devfloppy.c:160,172
1991/0727		{ Drive *dp; if(waserror()) for(dp = floppy.d; dp < &floppy.d[Nfloppy]; dp++){ if(dp->motoron && TK2SEC(m->ticks - dp->lasttouched) > 5)
1991/0728		if(dp->motoron && TK2SEC(m->ticks - dp->lasttouched) > 5 && canqlock(dp)){
1991/0727		floppystop(dp);
1991/0728		qunlock(dp); }
1991/0727		}                  alarm(5*1000, floppyalarm, 0); cancel(a); } int
1991/0727/sys/src/9/pc/devfloppy.c:341,358 – 1991/0728/sys/src/9/pc/devfloppy.c:338,360
1991/0727		} void floppyinit(void)
1991/0728		floppyreset(void)
1991/0727		{ Drive *dp; for(dp = floppy.d; dp < &floppy.d[Nfloppy]; dp++){ dp->t = &floppytype[0]; dp->cyl = -1;
1991/0728		dp->dev = dp - floppy.d; dp->t = &floppytype[0]; /* default type */
1991/0727		dp->motoron = 1;
1991/0728		dp->cyl = -1;
1991/0727		floppystop(dp); } setvec(22, floppyintr); alarm(5*1000, floppyalarm, (void *)0);
1991/0728		} void floppyinit(void) { kproc(floppykproc, 0);
1991/0727		} void