// get extended keyboard status
static void
handle_1612(struct bregs *regs)
{
yield();
regs->ax = ((GET_BDA(kbd_flag0) & ~((KF1_RCTRL|KF1_RALT) << 8))
| ((GET_BDA(kbd_flag1) & (KF1_RCTRL|KF1_RALT)) << 8));
//BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
}
// get extended keyboard status
static void
handle_1612(struct bregs *regs)
{
regs->al = GET_BDA(kbd_flag0);
regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT))
| (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT)));
//BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u16 keycode = GET_FARVAR(SEG_BDA, *(u16*)(buffer_head+0));
u8 ascii = keycode & 0xff;
if (!extended) {
// Translate extended keys
if (ascii == 0xe0 && keycode & 0xff00)
keycode &= 0xff00;
else if (keycode == 0xe00d || keycode == 0xe00a)
// Extended enter key
keycode = 0x1c00 | ascii;
else if (keycode == 0xe02f)
// Extended '/' key
keycode = 0x352f;
// Technically, if the ascii value is 0xf0 or if the
// 'scancode' is greater than 0x84 then the key should be
// discarded. However, there seems no harm in passing on the
// extended values in these cases.
}
if (ascii == 0xf0 && keycode & 0xff00)
keycode &= 0xff00;
regs->ax = keycode;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
// read disk status
static void
disk_1301(struct bregs *regs, struct drive_s *drive_g)
{
u8 v;
if (regs->dl < EXTSTART_HD)
// Floppy
v = GET_BDA(floppy_last_status);
else
v = GET_BDA(disk_last_status);
regs->ah = v;
set_cf(regs, v);
// XXX - clear disk_last_status?
}
void VISIBLE16
vbe_104f05(struct bregs *regs)
{
if (regs->bh > 1 || regs->bl > 1)
goto fail;
if (GET_BDA(vbe_mode) & MF_LINEARFB) {
regs->ah = VBE_RETURN_STATUS_INVALID;
return;
}
struct vgamode_s *vmode_g = get_current_mode();
if (! vmode_g)
goto fail;
if (regs->bh) {
int ret = vgahw_get_window(vmode_g, regs->bl);
if (ret < 0)
goto fail;
regs->dx = ret;
regs->ax = 0x004f;
return;
}
int ret = vgahw_set_window(vmode_g, regs->bl, regs->dx);
if (ret)
goto fail;
regs->ax = 0x004f;
return;
fail:
regs->ax = 0x014f;
}
static void
vbe_104f03(struct bregs *regs)
{
regs->bx = GET_BDA(vbe_mode);
dprintf(1, "VBE current mode=%x\n", regs->bx);
regs->ax = 0x004f;
}
static u8
enqueue_key(u16 keycode)
{
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
u16 buffer_head = GET_BDA(kbd_buf_head);
u16 buffer_tail = GET_BDA(kbd_buf_tail);
u16 temp_tail = buffer_tail;
buffer_tail += 2;
if (buffer_tail >= buffer_end)
buffer_tail = buffer_start;
if (buffer_tail == buffer_head)
return 0;
SET_FARVAR(SEG_BDA, *(u16*)(temp_tail+0), keycode);
SET_BDA(kbd_buf_tail, buffer_tail);
return 1;
}
// read disk drive parameters
static void noinline
disk_1308(struct bregs *regs, struct drive_s *drive_g)
{
u16 ebda_seg = get_ebda_seg();
// Get logical geometry from table
u16 nlc, nlh, nlspt;
fillLCHS(drive_g, &nlc, &nlh, &nlspt);
nlc--;
nlh--;
u8 count;
if (regs->dl < EXTSTART_HD) {
// Floppy
count = GET_GLOBAL(FloppyCount);
if (CONFIG_CDROM_EMU
&& drive_g == GLOBALFLAT2GLOBAL(GET_GLOBAL(cdemu_drive_gf)))
regs->bx = GET_EBDA2(ebda_seg, cdemu.media) * 2;
else
regs->bx = GET_GLOBAL(drive_g->floppy_type);
// set es & di to point to 11 byte diskette param table in ROM
regs->es = SEG_BIOS;
regs->di = (u32)&diskette_param_table2;
} else if (regs->dl < EXTSTART_CD) {
// Hard drive
count = GET_BDA(hdcount);
nlc--; // last sector reserved
} else {
// Not supported on CDROM
disk_ret(regs, DISK_RET_EPARAM);
return;
}
if (CONFIG_CDROM_EMU && GET_EBDA2(ebda_seg, cdemu.active)) {
u8 emudrive = GET_EBDA2(ebda_seg, cdemu.emulated_extdrive);
if (((emudrive ^ regs->dl) & 0x80) == 0)
// Note extra drive due to emulation.
count++;
if (regs->dl < EXTSTART_HD && count > 2)
// Max of two floppy drives.
count = 2;
}
regs->al = 0;
regs->ch = nlc & 0xff;
regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
regs->dh = nlh;
disk_ret(regs, DISK_RET_SUCCESS);
regs->dl = count;
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
if ((ascii_code == 0xF0 && scan_code != 0)
|| (ascii_code == 0xE0 && !extended))
ascii_code = 0;
regs->ax = (scan_code << 8) | ascii_code;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
static void
vbe_104f10(struct bregs *regs)
{
switch (regs->bl) {
case 0x00:
regs->bx = 0x0f30;
break;
case 0x01:
SET_BDA(vbe_flag, regs->bh);
break;
case 0x02:
regs->bh = GET_BDA(vbe_flag);
break;
default:
regs->ax = 0x014f;
return;
}
regs->ax = 0x004f;
}
int
cdrom_boot(struct drive_s *drive_g)
{
ASSERT32FLAT();
struct disk_op_s dop;
int cdid = getDriveId(EXTTYPE_CD, drive_g);
memset(&dop, 0, sizeof(dop));
dop.drive_g = drive_g;
if (!dop.drive_g || cdid < 0)
return 1;
int ret = scsi_is_ready(&dop);
if (ret)
dprintf(1, "scsi_is_ready returned %d\n", ret);
// Read the Boot Record Volume Descriptor
u8 buffer[CDROM_SECTOR_SIZE];
dop.lba = 0x11;
dop.count = 1;
dop.buf_fl = buffer;
ret = cdb_read(&dop);
if (ret)
return 3;
// Validity checks
if (buffer[0])
return 4;
if (strcmp((char*)&buffer[1], "CD001\001EL TORITO SPECIFICATION") != 0)
return 5;
// ok, now we calculate the Boot catalog address
u32 lba = *(u32*)&buffer[0x47];
// And we read the Boot Catalog
dop.lba = lba;
dop.count = 1;
ret = cdb_read(&dop);
if (ret)
return 7;
// Validation entry
if (buffer[0x00] != 0x01)
return 8; // Header
if (buffer[0x01] != 0x00)
return 9; // Platform
if (buffer[0x1E] != 0x55)
return 10; // key 1
if (buffer[0x1F] != 0xAA)
return 10; // key 2
// Initial/Default Entry
if (buffer[0x20] != 0x88)
return 11; // Bootable
u8 media = buffer[0x21];
CDEmu.media = media;
CDEmu.emulated_drive_gf = dop.drive_g;
u16 boot_segment = *(u16*)&buffer[0x22];
if (!boot_segment)
boot_segment = 0x07C0;
CDEmu.load_segment = boot_segment;
CDEmu.buffer_segment = 0x0000;
u16 nbsectors = *(u16*)&buffer[0x26];
CDEmu.sector_count = nbsectors;
lba = *(u32*)&buffer[0x28];
CDEmu.ilba = lba;
// And we read the image in memory
dop.lba = lba;
dop.count = DIV_ROUND_UP(nbsectors, 4);
dop.buf_fl = MAKE_FLATPTR(boot_segment, 0);
ret = cdb_read(&dop);
if (ret)
return 12;
if (media == 0) {
// No emulation requested - return success.
CDEmu.emulated_extdrive = EXTSTART_CD + cdid;
return 0;
}
// Emulation of a floppy/harddisk requested
if (! CONFIG_CDROM_EMU || !cdemu_drive_gf)
return 13;
// Set emulated drive id and increase bios installed hardware
// number of devices
if (media < 4) {
// Floppy emulation
CDEmu.emulated_extdrive = 0x00;
// XXX - get and set actual floppy count.
set_equipment_flags(0x41, 0x41);
switch (media) {
case 0x01: // 1.2M floppy
CDEmu.lchs.spt = 15;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x02: // 1.44M floppy
CDEmu.lchs.spt = 18;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x03: // 2.88M floppy
CDEmu.lchs.spt = 36;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
}
} else {
// Harddrive emulation
CDEmu.emulated_extdrive = 0x80;
SET_BDA(hdcount, GET_BDA(hdcount) + 1);
// Peak at partition table to get chs.
struct mbr_s *mbr = (void*)0;
u8 sptcyl = GET_FARVAR(boot_segment, mbr->partitions[0].last.sptcyl);
u8 cyllow = GET_FARVAR(boot_segment, mbr->partitions[0].last.cyllow);
u8 heads = GET_FARVAR(boot_segment, mbr->partitions[0].last.heads);
CDEmu.lchs.spt = sptcyl & 0x3f;
CDEmu.lchs.cylinders = ((sptcyl<<2)&0x300) + cyllow + 1;
CDEmu.lchs.heads = heads + 1;
}
// everything is ok, so from now on, the emulation is active
CDEmu.active = 0x01;
dprintf(6, "cdemu media=%d\n", media);
return 0;
}
// get shift flag status
static void
handle_1602(struct bregs *regs)
{
yield();
regs->al = GET_BDA(kbd_flag0);
}
handle_16a2(struct bregs *regs)
{
// don't change AH : function int16 ah=0x20-0x22 NOT supported
}
static void
handle_16XX(struct bregs *regs)
{
warn_unimplemented(regs);
}
static void noinline
set_leds(void)
{
u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07;
u8 kbd_led = GET_BDA(kbd_led);
u8 led_flags = kbd_led & 0x07;
if (shift_flags == led_flags)
return;
int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags);
if (ret)
// Error
return;
kbd_led = (kbd_led & ~0x07) | shift_flags;
SET_BDA(kbd_led, kbd_led);
}
// INT 16h Keyboard Service Entry Point
void VISIBLE16
handle_16(struct bregs *regs)