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wicat: Got the main board to start sending data to the terminal board.

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mc2661: Added various transmission and reception logic to help make the 
above possible [Barry Rodewald]
This commit is contained in:
mahlemiut 2013-12-14 03:18:28 +00:00
parent c2f7d28f60
commit 62ef3debc7
3 changed files with 179 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
src/emu/machine/mc2661.c
View File

@ -25,9 +25,14 @@ const device_type MC2661 = &device_creator<mc2661_device>;
// MACROS / CONSTANTS
//**************************************************************************
#define LOG 0
#define LOG 1
UINT32 baud_rates[16] =
{
50, 75, 110, 135 /*134.5*/, 150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 7200, 9600, 19200
};
enum
{
REGISTER_HOLDING = 0,
@ -193,6 +198,7 @@ void mc2661_device::device_reset()
m_mode_index = 0;
m_sync_index = 0;
m_signal = 0;
m_out_txd_func(1);
m_out_rxrdy_func(CLEAR_LINE);
@ -225,6 +231,8 @@ void mc2661_device::tra_callback()
void mc2661_device::tra_complete()
{
// TODO
m_sr |= STATUS_TXRDY;
m_out_txrdy_func(ASSERT_LINE);
}
@ -235,7 +243,7 @@ void mc2661_device::tra_complete()
void mc2661_device::rcv_callback()
{
if (m_in_rxd_func.isnull())
receive_register_update_bit(get_in_data_bit());
receive_register_update_bit(m_signal);
else
receive_register_update_bit(m_in_rxd_func());
}
@ -248,6 +256,10 @@ void mc2661_device::rcv_callback()
void mc2661_device::rcv_complete()
{
// TODO
receive_register_extract();
m_rhr = get_received_char();
m_sr |= STATUS_RXRDY;
m_out_rxrdy_func(ASSERT_LINE);
}
@ -273,6 +285,8 @@ READ8_MEMBER( mc2661_device::read )
{
case REGISTER_HOLDING:
data = m_rhr;
m_sr &= ~STATUS_RXRDY;
m_out_rxrdy_func(CLEAR_LINE);
break;
case REGISTER_STATUS:
@ -284,6 +298,7 @@ READ8_MEMBER( mc2661_device::read )
m_mode_index++;
m_mode_index &= 0x01;
break;
case REGISTER_COMMAND:
@ -310,6 +325,15 @@ WRITE8_MEMBER( mc2661_device::write )
if (LOG) logerror("MC2661 '%s' Transmit Holding Register: %02x\n", tag(), data);
m_thr = data;
if(COMMAND_TXEN)
{
if(COMMAND_MODE != 0x02)
transmit_register_setup(m_thr);
m_sr &= ~STATUS_TXRDY;
m_out_txrdy_func(CLEAR_LINE);
}
if(COMMAND_MODE == 0x02) // loopback - the Wicat will set this after enabling the transmitter
m_rhr = data;
break;
case REGISTER_SYNC:
@ -345,6 +369,54 @@ WRITE8_MEMBER( mc2661_device::write )
set_data_frame(word_length, stop_bits, parity_code, false);
}
if(m_mode_index == 1)
{
UINT32 rx_baud = baud_rates[data & 0x0f];
UINT32 tx_baud = baud_rates[data & 0x0f];
if(data & 0x10) // internal receiver clock
{
// if((m_mr[0] & 0x03) != 0)
// rx_baud *= 16;
}
else // external receiver clock
{
switch(m_mr[0] & 0x03)
{
case 0x02:
rx_baud *= 16;
break;
case 0x03:
rx_baud *= 64;
break;
default:
// x1
break;
}
}
if(data & 0x20) // internal transmitter clock
{
// if((m_mr[0] & 0x03) != 0)
// tx_baud *= 16;
}
else // external transmitter clock
{
switch(m_mr[0] & 0x03)
{
case 0x02:
tx_baud *= 16;
break;
case 0x03:
tx_baud *= 64;
break;
default:
// x1
break;
}
}
set_rcv_rate(rx_baud);
set_tra_rate(tx_baud);
}
m_mode_index++;
m_mode_index &= 0x01;
@ -355,13 +427,40 @@ WRITE8_MEMBER( mc2661_device::write )
m_cr = data & 0xef;
m_out_dtr_func(!COMMAND_DTR);
m_out_rts_func(!COMMAND_RTS);
if (COMMAND_MODE == 0x02) // local loopback
{
if(COMMAND_DTR && COMMAND_RTS) // CR1 and CR5 must be set to 1 to use local loopback
{
// probably much more to it that this, but this is enough for the Wicat to be happy
m_rhr = m_thr;
m_sr |= STATUS_RXRDY;
m_out_rxrdy_func(ASSERT_LINE);
return;
}
}
if (COMMAND_TXEN)
{
m_sr |= STATUS_TXRDY;
m_out_txrdy_func(ASSERT_LINE);
}
else
{
m_sr &= ~STATUS_TXRDY;
m_out_txrdy_func(CLEAR_LINE);
}
if (!COMMAND_RXEN)
{
m_sr &= ~STATUS_RXRDY;
m_out_rxrdy_func(CLEAR_LINE);
}
if (COMMAND_RESET)
{
m_sr &= ~(STATUS_FE | STATUS_OVERRUN | STATUS_PE);
}
m_out_dtr_func(!COMMAND_DTR);
m_out_rts_func(!COMMAND_RTS);
break;
}
}

3
src/emu/machine/mc2661.h
View File

@ -93,6 +93,8 @@ public:
DECLARE_READ_LINE_MEMBER( rxrdy_r );
DECLARE_READ_LINE_MEMBER( txemt_r );
DECLARE_WRITE_LINE_MEMBER( rx_w ) { m_signal = state; device_serial_interface::rx_w(state); }
protected:
// device-level overrides
virtual void device_config_complete();
@ -125,6 +127,7 @@ private:
UINT8 m_sr;
UINT8 m_mr[2];
UINT8 m_sync[3];
UINT8 m_signal;
int m_mode_index;
int m_sync_index;

97
src/mess/drivers/wicat.c
View File

@ -18,6 +18,7 @@ Wicat - various systems.
#include "machine/im6402.h"
#include "video/i8275x.h"
#include "machine/am9517a.h"
#include "machine/x2212.h"
#include "wicat.lh"
class wicat_state : public driver_device
@ -41,10 +42,13 @@ public:
, m_videouart0(*this,"videouart0")
, m_videouart1(*this,"videouart1")
, m_videouart(*this,"videouart")
, m_videosram(*this,"videosram")
{ }
DECLARE_READ16_MEMBER(invalid_r);
DECLARE_WRITE16_MEMBER(invalid_w);
DECLARE_READ16_MEMBER(memmap_r);
DECLARE_WRITE16_MEMBER(memmap_w);
DECLARE_WRITE16_MEMBER(parallel_led_w);
DECLARE_READ8_MEMBER(via_a_r);
DECLARE_READ8_MEMBER(via_b_r);
@ -56,11 +60,9 @@ public:
DECLARE_WRITE8_MEMBER(video_uart0_w);
DECLARE_READ8_MEMBER(video_uart1_r);
DECLARE_WRITE8_MEMBER(video_uart1_w);
DECLARE_READ8_MEMBER(videosram_r);
DECLARE_WRITE8_MEMBER(videosram_w);
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { return 0; }
private:
virtual void machine_start();
virtual void machine_reset();
required_shared_ptr<UINT8> m_vram;
required_device<cpu_device> m_maincpu;
required_device<mm58274c_device> m_rtc;
@ -77,6 +79,12 @@ private:
required_device<mc2661_device> m_videouart0;
required_device<mc2661_device> m_videouart1;
required_device<im6402_device> m_videouart;
required_device<x2212_device> m_videosram;
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { return 0; }
private:
virtual void machine_start();
virtual void machine_reset();
UINT8 m_portA;
UINT8 m_portB;
@ -91,6 +99,7 @@ static ADDRESS_MAP_START(wicat_mem, AS_PROGRAM, 16, wicat_state)
AM_RANGE(0x200000, 0x2fffff) AM_RAM
AM_RANGE(0x300000, 0xdfffff) AM_READWRITE(invalid_r,invalid_w)
AM_RANGE(0xeff800, 0xeffbff) AM_RAM // memory mapping SRAM, used during boot sequence for the stack (TODO)
AM_RANGE(0xeffc00, 0xeffc01) AM_READWRITE(memmap_r,memmap_w)
AM_RANGE(0xf00000, 0xf00007) AM_DEVREADWRITE8("uart0",mc2661_device,read,write,0xff00) // UARTs
AM_RANGE(0xf00008, 0xf0000f) AM_DEVREADWRITE8("uart1",mc2661_device,read,write,0xff00)
AM_RANGE(0xf00010, 0xf00017) AM_DEVREADWRITE8("uart2",mc2661_device,read,write,0xff00)
@ -110,9 +119,10 @@ static ADDRESS_MAP_START(wicat_video_mem, AS_PROGRAM, 16, wicat_state)
ADDRESS_MAP_END
static ADDRESS_MAP_START(wicat_video_io, AS_PROGRAM, 8, wicat_state)
// yet to figure out...
// these are largely wild guesses...
AM_RANGE(0x0100,0x0107) AM_READWRITE(video_uart0_r,video_uart0_w)
AM_RANGE(0x0200,0x0207) AM_READWRITE(video_uart1_r,video_uart1_w)
AM_RANGE(0x0400,0x047f) AM_READWRITE(videosram_r,videosram_w) // XD2210 4-bit NOVRAM
AM_RANGE(0x0700,0x0700) AM_DEVREADWRITE("videouart",im6402_device,read,write) // UART?
AM_RANGE(0x0800,0x080f) AM_DEVREADWRITE("videodma",am9517a_device,read,write) // DMA?
AM_RANGE(0x0b00,0x0b03) AM_READWRITE(video_r,video_w)
@ -133,6 +143,10 @@ void wicat_state::machine_start()
void wicat_state::machine_reset()
{
// on the terminal board /DCD on both INS2651s is tied to GND
m_videouart0->dcd_w(0);
m_videouart1->dcd_w(0);
m_uart0->dcd_w(0);
}
WRITE16_MEMBER( wicat_state::parallel_led_w )
@ -182,6 +196,18 @@ WRITE16_MEMBER( wicat_state::invalid_w )
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
}
// TODO
READ16_MEMBER(wicat_state::memmap_r)
{
popmessage("Memory mapping register EFFC01 read!");
return 0xff;
}
WRITE16_MEMBER(wicat_state::memmap_w)
{
popmessage("Memory mapping register EFFC01 written!");
}
READ8_MEMBER(wicat_state::video_r)
{
switch(offset)
@ -232,6 +258,26 @@ WRITE8_HANDLER(wicat_state::video_uart1_w)
m_videouart1->write(space,noff,data);
}
// XD2210 256 x 4bit NOVRAM
READ8_MEMBER(wicat_state::videosram_r)
{
if(offset == 0x08 || offset == 0x0c)
return 0x08;
if(offset == 0x06 || offset == 0x0a)
return 0x0e;
if(offset & 0x01)
return 0xff;
else
return m_videosram->read(space,offset/2);
}
WRITE8_MEMBER(wicat_state::videosram_w)
{
if(!(offset & 0x01))
m_videosram->write(space,offset/2,data);
}
I8275_DISPLAY_PIXELS(wicat_display_pixels)
{
//wicat_state *state = device->machine().driver_data<wicat_state>();
@ -242,15 +288,15 @@ I8275_DISPLAY_PIXELS(wicat_display_pixels)
// internal terminal
static mc2661_interface wicat_uart0_intf =
{
0, // RXC
0, // TXC
19200, // RXC
19200, // TXC
DEVCB_NULL, // RXD in
DEVCB_NULL, // RXD out
DEVCB_DEVICE_LINE_MEMBER("videouart0",mc2661_device, rx_w), // TXD out
DEVCB_CPU_INPUT_LINE("maincpu",M68K_IRQ_2), // RXRDY out
DEVCB_NULL, // TXRDY out
DEVCB_NULL, //DEVCB_DEVICE_LINE_MEMBER(RS232_TAG, rs232_port_device, rts_w), // RTS out
DEVCB_NULL, //DEVCB_DEVICE_LINE_MEMBER(RS232_TAG, rs232_port_device, dtr_w), // DTR out
DEVCB_CPU_INPUT_LINE("maincpu",M68K_IRQ_2), // TXEMT out
DEVCB_DEVICE_LINE_MEMBER("videouart0", mc2661_device, cts_w), // RTS out
DEVCB_DEVICE_LINE_MEMBER("videouart0", mc2661_device, dsr_w), // DTR out
DEVCB_NULL, // TXEMT out
DEVCB_NULL, // BKDET out
DEVCB_NULL // XSYNC out
};
@ -281,7 +327,7 @@ static mc2661_interface wicat_uart2_intf =
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("serial2", rs232_port_device, rts_w),
DEVCB_DEVICE_LINE_MEMBER("serial2", rs232_port_device, dtr_w),
DEVCB_CPU_INPUT_LINE("maincpu",M68K_IRQ_2), // TXEMT out
DEVCB_NULL, // TXEMT out
DEVCB_NULL,
DEVCB_NULL
};
@ -350,23 +396,23 @@ static mc2661_interface wicat_uart6_intf =
// terminal (2x INS2651, 1x IM6042 - one of these is for the keyboard, another communicates with the main board, the third is unknown)
static mc2661_interface wicat_video_uart0_intf =
{
0, // RXC
0, // TXC
19200, // RXC
19200, // TXC
DEVCB_NULL, // RXD in
DEVCB_NULL, // RXD out
DEVCB_DEVICE_LINE_MEMBER("uart0",mc2661_device, rx_w), // RXD out
DEVCB_CPU_INPUT_LINE("videocpu",INPUT_LINE_IRQ0), // RXRDY out
DEVCB_NULL, // TXRDY out
DEVCB_NULL, //DEVCB_DEVICE_LINE_MEMBER(RS232_TAG, rs232_port_device, rts_w), // RTS out
DEVCB_NULL, //DEVCB_DEVICE_LINE_MEMBER(RS232_TAG, rs232_port_device, dtr_w), // DTR out
DEVCB_CPU_INPUT_LINE("videocpu",INPUT_LINE_IRQ0), // TXEMT out
DEVCB_DEVICE_LINE_MEMBER("uart0",mc2661_device, cts_w), // RTS out
DEVCB_DEVICE_LINE_MEMBER("uart0",mc2661_device, dsr_w), // DTR out
DEVCB_NULL, // TXEMT out
DEVCB_NULL, // BKDET out
DEVCB_NULL // XSYNC out
};
static mc2661_interface wicat_video_uart1_intf =
{
0, // RXC
0, // TXC
19200, // RXC
19200, // TXC
DEVCB_NULL, // RXD in
DEVCB_NULL, // RXD out
DEVCB_CPU_INPUT_LINE("videocpu",INPUT_LINE_IRQ0), // RXRDY out
@ -415,7 +461,7 @@ static mm58274c_interface wicat_rtc_intf =
struct rs232_port_interface wicat_serial1_intf =
{
DEVCB_NULL, // RX out
DEVCB_DEVICE_LINE_MEMBER("uart1",mc2661_device,rx_w), // RX out
DEVCB_DEVICE_LINE_MEMBER("uart1",mc2661_device,dcd_w), // DCD out
DEVCB_DEVICE_LINE_MEMBER("uart1",mc2661_device,dsr_w), // DSR out
DEVCB_NULL, // RI out
@ -424,7 +470,7 @@ struct rs232_port_interface wicat_serial1_intf =
struct rs232_port_interface wicat_serial2_intf =
{
DEVCB_NULL, // RX out
DEVCB_DEVICE_LINE_MEMBER("uart2",mc2661_device,rx_w), // RX out
DEVCB_DEVICE_LINE_MEMBER("uart2",mc2661_device,dcd_w), // DCD out
DEVCB_DEVICE_LINE_MEMBER("uart2",mc2661_device,dsr_w), // DSR out
DEVCB_NULL, // RI out
@ -433,7 +479,7 @@ struct rs232_port_interface wicat_serial2_intf =
struct rs232_port_interface wicat_serial3_intf =
{
DEVCB_NULL, // RX out
DEVCB_DEVICE_LINE_MEMBER("uart3",mc2661_device,rx_w), // RX out
DEVCB_DEVICE_LINE_MEMBER("uart3",mc2661_device,dcd_w), // DCD out
DEVCB_DEVICE_LINE_MEMBER("uart3",mc2661_device,dsr_w), // DSR out
DEVCB_NULL, // RI out
@ -442,7 +488,7 @@ struct rs232_port_interface wicat_serial3_intf =
struct rs232_port_interface wicat_serial4_intf =
{
DEVCB_NULL, // RX out
DEVCB_DEVICE_LINE_MEMBER("uart4",mc2661_device,rx_w), // RX out
DEVCB_DEVICE_LINE_MEMBER("uart4",mc2661_device,dcd_w), // DCD out
DEVCB_DEVICE_LINE_MEMBER("uart4",mc2661_device,dsr_w), // DSR out
DEVCB_NULL, // RI out
@ -451,7 +497,7 @@ struct rs232_port_interface wicat_serial4_intf =
struct rs232_port_interface wicat_serial5_intf =
{
DEVCB_NULL, // RX out
DEVCB_DEVICE_LINE_MEMBER("uart5",mc2661_device,rx_w), // RX out
DEVCB_DEVICE_LINE_MEMBER("uart5",mc2661_device,dcd_w), // DCD out
DEVCB_DEVICE_LINE_MEMBER("uart5",mc2661_device,dsr_w), // DSR out
DEVCB_NULL, // RI out
@ -503,6 +549,7 @@ static MACHINE_CONFIG_START( wicat, wicat_state )
MCFG_IM6402_ADD("videouart", wicat_video_uart_intf)
MCFG_MC2661_ADD("videouart0", XTAL_5_0688MHz, wicat_video_uart0_intf) // the INS2651 looks similar enough to the MC2661...
MCFG_MC2661_ADD("videouart1", XTAL_5_0688MHz, wicat_video_uart1_intf)
MCFG_X2212_ADD("videosram") // XD2210
MCFG_SCREEN_ADD("screen",RASTER)
MCFG_SCREEN_SIZE(400,300)