.startup_time = 0x08,
};
+u8 FloppyCount VAR16_32;
+u8 FloppyTypes[2] VAR16_32;
+
void
floppy_drive_setup()
{
if (! CONFIG_FLOPPY_SUPPORT)
return;
dprintf(3, "init floppy drives\n");
- if (CONFIG_COREBOOT)
- // XXX - disable floppies on coreboot for now.
- outb_cmos(0, CMOS_FLOPPY_DRIVE_TYPE);
- u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- u8 out = 0;
- u8 num_floppies = 0;
+ FloppyCount = 0;
+ FloppyTypes[0] = FloppyTypes[1] = 0;
- if (type & 0xf0) {
- out |= 0x07;
- num_floppies++;
- }
- if (type & 0x0f) {
- out |= 0x70;
- num_floppies++;
+ u8 out = 0;
+ if (CONFIG_COREBOOT) {
+ // XXX - disable floppies on coreboot for now.
+ } else {
+ u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
+ if (type & 0xf0) {
+ out |= 0x07;
+ FloppyTypes[0] = type >> 4;
+ FloppyCount++;
+ }
+ if (type & 0x0f) {
+ out |= 0x70;
+ FloppyTypes[1] = type & 0x0f;
+ FloppyCount++;
+ }
}
SET_BDA(floppy_harddisk_info, out);
// Update equipment word bits for floppy
- if (num_floppies == 1)
+ if (FloppyCount == 1)
// 1 drive, ready for boot
SETBITS_BDA(equipment_list_flags, 0x01);
- else if (num_floppies == 2)
+ else if (FloppyCount == 2)
// 2 drives, ready for boot
SETBITS_BDA(equipment_list_flags, 0x41);
SET_BDA(floppy_track0, cyl);
}
-static u16
-get_drive_type(u8 drive)
-{
- // check CMOS to see if drive exists
- u8 drive_type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- if (drive == 0)
- drive_type >>= 4;
- else
- drive_type &= 0x0f;
- return drive_type;
-}
-
static u16
floppy_media_known(u8 drive)
{
}
// check port 3f4 for accessibility to status bytes
- if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0)
- BX_PANIC("int13_diskette: ctrl not ready\n");
+ if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0) {
+ floppy_ret(regs, DISK_RET_ECONTROLLER);
+ return -1;
+ }
// read 7 return status bytes from controller
u8 i;
// 110 reserved
// 111 all other formats/drives
- switch (get_drive_type(drive)) {
+ switch (GET_GLOBAL(FloppyTypes[drive])) {
case 1:
// 360K 5.25" drive
config_data = 0x00; // 0000 0000
check_drive(struct bregs *regs, u8 drive)
{
// see if drive exists
- if (drive > 1 || !get_drive_type(drive)) {
+ if (drive > 1 || !GET_GLOBAL(FloppyTypes[drive])) {
// XXX - return type doesn't match
floppy_ret(regs, DISK_RET_ETIMEOUT);
return -1;
floppy_ret(regs, DISK_RET_EPARAM);
return;
}
- if (!get_drive_type(drive)) {
+ if (!GET_GLOBAL(FloppyTypes[drive])) {
floppy_ret(regs, DISK_RET_ETIMEOUT);
return;
}
goto fail;
if (data[0] & 0xc0) {
- if (data[1] & 0x02) {
+ if (data[1] & 0x02)
floppy_ret(regs, DISK_RET_EWRITEPROTECT);
- goto fail;
- }
- BX_PANIC("int13_diskette_function: read error\n");
+ else
+ floppy_ret(regs, DISK_RET_ECONTROLLER);
+ goto fail;
}
// ??? should track be new val from return_status[3] ?
return;
if (data[0] & 0xc0) {
- if (data[1] & 0x02) {
+ if (data[1] & 0x02)
floppy_ret(regs, DISK_RET_EWRITEPROTECT);
- return;
- }
- BX_PANIC("int13_diskette_function: read error\n");
+ else
+ floppy_ret(regs, DISK_RET_ECONTROLLER);
+ return;
}
set_diskette_current_cyl(drive, 0);
{
dprintf(3, "floppy f08\n");
- u8 drive_type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- u8 num_floppies = 0;
- if (drive_type & 0xf0)
- num_floppies++;
- if (drive_type & 0x0f)
- num_floppies++;
-
+ regs->ax = 0;
+ regs->dx = GET_GLOBAL(FloppyCount);
if (drive > 1) {
- regs->ax = 0;
regs->bx = 0;
regs->cx = 0;
- regs->dx = 0;
regs->es = 0;
regs->di = 0;
- regs->dl = num_floppies;
set_fail(regs);
return;
}
- if (drive == 0)
- drive_type >>= 4;
- else
- drive_type &= 0x0f;
-
- regs->bh = 0;
- regs->bl = drive_type;
- regs->ah = 0;
- regs->al = 0;
- regs->dl = num_floppies;
+ u8 drive_type = GET_GLOBAL(FloppyTypes[drive]);
+ regs->bx = drive_type;
switch (drive_type) {
+ default: // ?
+ dprintf(1, "floppy: int13: bad floppy type\n");
+ // NO BREAK
case 0: // none
regs->cx = 0;
regs->dh = 0; // max head #
break;
-
case 1: // 360KB, 5.25"
regs->cx = 0x2709; // 40 tracks, 9 sectors
regs->dh = 1; // max head #
break;
-
case 2: // 1.2MB, 5.25"
regs->cx = 0x4f0f; // 80 tracks, 15 sectors
regs->dh = 1; // max head #
break;
-
case 3: // 720KB, 3.5"
regs->cx = 0x4f09; // 80 tracks, 9 sectors
regs->dh = 1; // max head #
break;
-
case 4: // 1.44MB, 3.5"
regs->cx = 0x4f12; // 80 tracks, 18 sectors
regs->dh = 1; // max head #
break;
-
case 5: // 2.88MB, 3.5"
regs->cx = 0x4f24; // 80 tracks, 36 sectors
regs->dh = 1; // max head #
break;
-
case 6: // 160k, 5.25"
regs->cx = 0x2708; // 40 tracks, 8 sectors
regs->dh = 0; // max head #
break;
-
case 7: // 180k, 5.25"
regs->cx = 0x2709; // 40 tracks, 9 sectors
regs->dh = 0; // max head #
break;
-
case 8: // 320k, 5.25"
regs->cx = 0x2708; // 40 tracks, 8 sectors
regs->dh = 1; // max head #
break;
-
- default: // ?
- BX_PANIC("floppy: int13: bad floppy type\n");
}
/* set es & di to point to 11 byte diskette param table in ROM */
// set_diskette_ret_status here ???
return;
}
- u8 drive_type = get_drive_type(drive);
+ u8 drive_type = GET_GLOBAL(FloppyTypes[drive]);
regs->ah = (drive_type != 0);
set_success(regs);