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|
/*********************************************************************
8042kbdc.c
Code specific to fun IBM AT stuff
PeT's notes about various Power On Self Tests (POSTs)
at post
-------
f81d2 01
f82e6 05
f8356 07
f83e5 0a
f847e 0e
f8e7c 10
f8f3a 13
f9058 1a
f913a 1e
fa8ba 30
fa96c 36
fa9d3 3c
fa9f4 3e
ff122 50
ff226 5b
ff29f 5f
f9228 70
f92b2 74 ide?
ibm at bios
-----------
f0101 after switch to real mode jump back!!!!!!!!!!
jumping table
f0123
f098e memory tests
f10b4 ???
not reached
f1050
f1617
f0119
f10d8
f10b7 system board error
f019f
f025b
f02e6
f0323
f03b3 0e
f03d7 0f
f058d
at8042 signal timing test
sets errorcode!
f0655
f06a3 postcode 15
f06ba 16
f0747 18
f0763 enter pm! (0x81, 0x85)
f0766 1a
f07b3 first 640kb memory test
f084c 1c
f086e extended memory test
f0928 1f
f097d 20
???
f0ff4 34
???
f1675 f0
f16cb f2
illegal access trap test!!!!
f16fe f3
task descriptor test!!!!
f174a f4
f17af f5
f1800 f6 writing to non write segment
f1852 f7 arpl
f1880 f8 lar, lsl
f18ca fa
f10d8
f10ec 35
f1106 36
f1137 !!!!!!!keyboard test fails
f11aa 3a
f1240 3c harddisk controller test!!!
f13f3 3b
f1a6d xthdd bios init
f1429
f1462
f1493 40
f1532
keyboard lock
f1 to unlock
f155c
jumps to f0050 (reset) without enabling of the a20 gate --> hangs
0412 bit 5 must be set to reach f1579
f1579
f15c3 41
f1621 43
routines
f1945 read cmos ram
f195f write to cmos al value ah
f1a3a poll 0x61 bit 4
f1a49 sets something in cmos ram
f1d30 switch to protected mode
neat
----
f80b9
at386
-----
fd28c fd
fd2c3 fc
f40dc
fd949
fd8e3
fd982
f4219 01
f4296 03
f42f3 04
f4377 05
f43ec 06
f4430 08
f6017 switches to PM
f4456 09
f55a2
f44ec 0d
f4557 20
f462d 27 my special friend, the keyboard controller once more
ed0a1
f4679 28
fa16a
f46d6
f4768 2c
f47f0 2e
f5081
fa16a
f9a83
Message: "Checksum Error on Extended CMOS"
f4840 34
f488c 35
reset
f48ee
f493e 3a
f49cd
f4fc7
fe842
f4a5a
f4b01 38
(Memory Test)
f4b41 3b
f4c0f
Message: "Invalid configuration information - please run SETUP program"
f4c5c
f86fc
f8838
f4c80
f4ca2
f4d4c
f4e15 (int 19h)
[f9a83 output text at return address!, return after text]
at486
-----
f81a5 03
f1096 0f 09 wbinvd i486 instruction
*********************************************************************/
#include "machine/8042kbdc.h"
/***************************************************************************
Constants & macros
***************************************************************************/
#define PS2_MOUSE_ON 1
#define KEYBOARD_ON 1
#define LOG_KEYBOARD 0
#define LOG_ACCESSES 0
const device_type KBDC8042 = &device_creator<kbdc8042_device>;
//-------------------------------------------------
// kbdc8042_device - constructor
//-------------------------------------------------
kbdc8042_device::kbdc8042_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, KBDC8042, "Keyboard Controller 8042", tag, owner, clock, "kbdc8042", __FILE__)
, m_keyboard_dev(*this, "at_keyboard")
{
}
static MACHINE_CONFIG_FRAGMENT( keyboard )
MCFG_AT_KEYB_ADD("at_keyboard", 1, WRITELINE(kbdc8042_device, keyboard_w))
MACHINE_CONFIG_END
machine_config_constructor kbdc8042_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( keyboard );
}
//-------------------------------------------------
// device_config_complete - perform any
// operations now that the configuration is
// complete
//-------------------------------------------------
void kbdc8042_device::device_config_complete()
{
// inherit a copy of the static data
const kbdc8042_interface *intf = reinterpret_cast<const kbdc8042_interface *>(static_config());
if (intf != NULL)
{
*static_cast<kbdc8042_interface *>(this) = *intf;
}
// or initialize to defaults if none provided
else
{
memset(&m_system_reset_cb, 0, sizeof(m_system_reset_cb));
memset(&m_gate_a20_cb, 0, sizeof(m_gate_a20_cb));
memset(&m_input_buffer_full_func, 0, sizeof(m_input_buffer_full_func));
memset(&m_output_buffer_empty_cb, 0, sizeof(m_output_buffer_empty_cb));
memset(&m_speaker_cb, 0, sizeof(m_speaker_cb));
}
}
/*-------------------------------------------------
device_start - device-specific startup
-------------------------------------------------*/
void kbdc8042_device::device_start()
{
// resolve callbacks
m_system_reset_func.resolve(m_system_reset_cb, *this);
m_gate_a20_func.resolve(m_gate_a20_cb, *this);
m_input_buffer_full_func.resolve(m_input_buffer_full_cb, *this);
m_output_buffer_empty_func.resolve(m_output_buffer_empty_cb, *this);
m_speaker_func.resolve(m_speaker_cb, *this);
m_operation_write_state = 0; /* first write to 0x60 might occur before anything can set this */
}
/*-------------------------------------------------
device_reset - device-specific reset
-------------------------------------------------*/
void kbdc8042_device::device_reset()
{
m_poll_delay = 10;
/* ibmat bios wants 0x20 set! (keyboard locked when not set) 0x80 */
m_inport = 0xa0;
at_8042_set_outport(0xfe, 1);
}
void kbdc8042_device::at_8042_set_outport(UINT8 data, int initial)
{
UINT8 change;
change = initial ? 0xFF : (m_outport ^ data);
m_outport = data;
if (change & 0x02)
{
if (!m_gate_a20_func.isnull())
m_gate_a20_func(data & 0x02 ? 1 : 0);
}
}
WRITE_LINE_MEMBER( kbdc8042_device::keyboard_w )
{
if(state)
at_8042_check_keyboard();
}
TIMER_CALLBACK_MEMBER( kbdc8042_device::kbdc8042_clr_int )
{
/* Lets 8952's timers do their job before clear the interrupt line, */
/* else Keyboard interrupt never happens. */
m_input_buffer_full_func(0);
}
void kbdc8042_device::at_8042_receive(UINT8 data)
{
if (LOG_KEYBOARD)
logerror("at_8042_receive Received 0x%02x\n", data);
m_data = data;
m_keyboard.received = 1;
if (!m_input_buffer_full_func.isnull())
{
m_input_buffer_full_func(1);
/* Lets 8952's timers do their job before clear the interrupt line, */
/* else Keyboard interrupt never happens. */
machine().scheduler().timer_set(attotime::from_usec(2), timer_expired_delegate(FUNC(kbdc8042_device::kbdc8042_clr_int),this));
}
}
void kbdc8042_device::at_8042_check_keyboard()
{
int data;
if (!m_keyboard.received && !m_mouse.received)
{
if((data = m_keyboard_dev->read(machine().driver_data()->generic_space(), 0)))
at_8042_receive(data);
}
}
void kbdc8042_device::at_8042_clear_keyboard_received()
{
if (m_keyboard.received)
{
if (LOG_KEYBOARD)
logerror("kbdc8042_8_r(): Clearing m_keyboard.received\n");
}
m_keyboard.received = 0;
m_mouse.received = 0;
}
/* **************************************************************************
* Port 0x60 Input and Output Buffer (keyboard and mouse data)
* Port 0x64 Read Status Register
* Write operation for controller
*
* Output port controller:
* 7: Keyboard data
* 6: Keyboard clock
* 5: Mouse buffer full
* 4: Keyboard buffer full
* 3: Mouse clock
* 2: Mouse data
* 1: 0 A20 cleared
* 0: 0 system reset
*
* Input port controller
* 7: 0=Keyboard Locked
* 6: 1 = Monochrome 0 = Color (true for real IBM, clones are undefined and use CMOS RAM data)
* 5..2: reserved
* 1: Mouse data in
* 0: Keyboard data in
*/
READ8_MEMBER(kbdc8042_device::data_r)
{
UINT8 data = 0;
switch (offset) {
case 0:
data = m_data;
if ((m_status_read_mode != 3) || (data != 0xfa))
{
if (m_keybtype != KBDC8042_AT386 || (data != 0x55))
{
/* at386 self test doesn't like this */
at_8042_clear_keyboard_received();
}
at_8042_check_keyboard();
}
else
{
m_status_read_mode = 4;
}
break;
case 1:
data = m_speaker;
data &= ~0xc0; /* AT BIOS don't likes this being set */
/* needed for AMI BIOS, maybe only some keyboard controller revisions! */
at_8042_clear_keyboard_received();
/* polled for changes in ibmat bios */
if (--m_poll_delay < 0)
{
if (m_keybtype != KBDC8042_PS2)
m_poll_delay = 4; /* ibmat */
else
m_poll_delay = 8; /* ibm ps2m30 */
m_offset1 ^= 0x10;
}
data = (data & ~0x10) | m_offset1;
if (m_speaker & 1)
data |= 0x20;
else
data &= ~0x20; /* ps2m30 wants this */
break;
case 2:
if (m_out2)
data |= 0x20;
else
data &= ~0x20;
break;
case 4:
at_8042_check_keyboard();
if (m_keyboard.received || m_mouse.received)
data |= 1;
if (m_sending)
data |= 2;
m_sending = 0; /* quicker than normal */
data |= 4; /* selftest ok */
if (m_last_write_to_control)
data |= 8;
switch (m_status_read_mode) {
case 0:
if (!m_keyboard.on) data|=0x10;
if (m_mouse.received) data|=0x20;
break;
case 1:
data |= m_inport&0xf;
break;
case 2:
data |= m_inport<<4;
break;
case 4:
at_8042_receive(0xaa);
m_status_read_mode = 0;
break;
}
break;
}
if (LOG_ACCESSES)
logerror("kbdc8042_8_r(): offset=%d data=0x%02x\n", offset, (unsigned) data);
return data;
}
WRITE8_MEMBER(kbdc8042_device::data_w)
{
switch (offset) {
case 0:
m_last_write_to_control = 0;
m_status_read_mode = 0;
switch (m_operation_write_state) {
case 0:
if ((data == 0xf4) || (data == 0xff)) /* keyboard enable or keyboard reset */
{
at_8042_receive(0xfa); /* ACK, delivered a bit differently */
if (data == 0xff)
{
m_status_read_mode = 3; /* keyboard buffer to be written again after next read */
}
break;
}
/* normal case */
m_data = data;
m_sending=1;
m_keyboard_dev->write(space, 0, data);
break;
case 1:
/* preceded by writing 0xD1 to port 60h
* |7|6|5|4|3|2|1|0| 8042 Output Port
* | | | | | | | `---- system reset line
* | | | | | | `----- gate A20
* | | | | `-------- undefined
* | | | `--------- output buffer full
* | | `---------- input buffer empty
* | `----------- keyboard clock (output)
* `------------ keyboard data (output)
*/
at_8042_set_outport(data, 0);
break;
case 2:
/* preceded by writing 0xD2 to port 60h */
m_data = data;
m_sending=1;
m_keyboard_dev->write(space, 0, data);
break;
case 3:
/* preceded by writing 0xD3 to port 60h */
m_data = data;
break;
case 4:
/* preceded by writing 0xD4 to port 60h */
m_data = data;
break;
case 5:
/* preceded by writing 0x60 to port 60h */
m_command = data;
break;
}
m_operation_write_state = 0;
break;
case 1:
m_speaker = data;
if (!m_speaker_func.isnull())
m_speaker_func(0, m_speaker);
break;
case 4:
m_last_write_to_control=0;
/* switch based on the command */
switch(data) {
case 0x20: /* current 8042 command byte is placed on port 60h */
m_data = m_command;
break;
case 0x60: /* next data byte is placed in 8042 command byte */
m_operation_write_state = 5;
m_send_to_mouse = 0;
break;
case 0xa7: /* disable auxilary interface */
m_mouse.on = 0;
break;
case 0xa8: /* enable auxilary interface */
m_mouse.on = 1;
break;
case 0xa9: /* test mouse */
at_8042_receive(PS2_MOUSE_ON ? 0x00 : 0xff);
break;
case 0xaa: /* selftest */
at_8042_receive(0x55);
break;
case 0xab: /* test keyboard */
at_8042_receive(KEYBOARD_ON ? 0x00 : 0xff);
break;
case 0xad: /* disable keyboard interface */
m_keyboard.on = 0;
break;
case 0xae: /* enable keyboard interface */
m_keyboard.on = 1;
break;
case 0xc0: /* read input port */
/* |7|6|5|4|3 2 1 0| 8042 Input Port
* | | | | |
* | | | | `------- undefined
* | | | |
* | | | `--------- 1=enable 2nd 256k of Motherboard RAM
* | | `---------- 1=manufacturing jumper installed
* | `----------- 1=primary display is MDA, 0=CGA
* `------------ 1=keyboard not inhibited; 0=inhibited
*/
at_8042_receive(m_inport);
break;
case 0xc1: /* read input port 3..0 until write to 0x60 */
m_status_read_mode = 1;
break;
case 0xc2: /* read input port 7..4 until write to 0x60 */
m_status_read_mode = 2;
break;
case 0xd0: /* read output port */
at_8042_receive(m_outport);
break;
case 0xd1:
/* write output port; next byte written to port 60h is placed on
* 8042 output port */
m_operation_write_state = 1;
return; /* instant delivery */
case 0xd2:
/* write keyboard output register; on PS/2 systems next port 60h
* write is written to port 60h output register as if initiated
* by a device; invokes interrupt if enabled */
m_operation_write_state = 2;
m_send_to_mouse = 0;
break;
case 0xd3:
/* write auxillary output register; on PS/2 systems next port 60h
* write is written to port 60h input register as if initiated
* by a device; invokes interrupt if enabled */
m_operation_write_state = 3;
m_send_to_mouse = 1;
break;
case 0xd4:
/* write auxillary device; on PS/2 systems the next data byte
* written to input register a port at 60h is sent to the
* auxiliary device */
m_operation_write_state = 4;
break;
case 0xe0:
/* read test inputs; read T1/T0 test inputs into bit 1/0 */
at_8042_receive(0x00);
break;
case 0xf0:
case 0xf2:
case 0xf4:
case 0xf6:
case 0xf8:
case 0xfa:
case 0xfc:
case 0xfe:
/* Commands 0xF0...0xFF causes certain output lines to be pulsed
* low for six milliseconds. The bits pulsed low correspond to
* the bits low set in the command byte. The only pulse that has
* an effect currently is bit 0, which pulses the CPU's reset line
*/
m_system_reset_func(PULSE_LINE);
at_8042_set_outport(m_outport | 0x02, 0);
break;
}
m_sending = 1;
break;
}
}
WRITE_LINE_MEMBER(kbdc8042_device::write_out2)
{
m_out2 = state;
}
|