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tv912.cpp: Hook up UART (not fully configured yet) (nw)

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This commit is contained in:
AJR 2018-01-17 16:03:43 -05:00
parent a34468cd86
commit d0d4cc1318
1 changed files with 67 additions and 3 deletions
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70
src/mame/drivers/tv912.cpp
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:
// copyright-holders:AJR
/*******************************************************************************
TeleVideo TVI-912/TVI-920 terminals
@ -15,7 +15,7 @@
#include "emu.h"
#include "cpu/mcs48/mcs48.h"
//#include "bus/rs232/rs232.h"
//#include "machine/ay31015.h"
#include "machine/ay31015.h"
#include "machine/bankdev.h"
#include "sound/beep.h"
#include "video/tms9927.h"
@ -31,18 +31,25 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_crtc(*this, "crtc")
, m_uart(*this, "uart")
, m_bankdev(*this, "bankdev")
, m_beep(*this, "beep")
, m_dispram_bank(*this, "dispram")
, m_p_chargen(*this, "chargen")
, m_keys(*this, "KEY%u", 0)
, m_modifiers(*this, "MODIFIERS")
, m_jumpers(*this, "JUMPERS")
, m_option(*this, "OPTION")
{ }
DECLARE_WRITE8_MEMBER(p1_w);
DECLARE_WRITE8_MEMBER(p2_w);
DECLARE_READ8_MEMBER(crtc_r);
DECLARE_WRITE8_MEMBER(crtc_w);
DECLARE_READ8_MEMBER(uart_status_r);
DECLARE_READ8_MEMBER(uart_data_r);
DECLARE_WRITE8_MEMBER(uart_data_w);
DECLARE_WRITE_LINE_MEMBER(uart_reset_w);
DECLARE_READ8_MEMBER(keyboard_r);
DECLARE_WRITE8_MEMBER(output_40c);
@ -54,12 +61,15 @@ private:
required_device<cpu_device> m_maincpu;
required_device<tms9927_device> m_crtc;
required_device<ay51013_device> m_uart;
required_device<address_map_bank_device> m_bankdev;
required_device<beep_device> m_beep;
required_memory_bank m_dispram_bank;
required_region_ptr<u8> m_p_chargen;
required_ioport_array<32> m_keys;
required_ioport m_modifiers;
required_ioport m_jumpers;
required_ioport m_option;
u8 m_keyboard_scan;
std::unique_ptr<u8[]> m_dispram;
@ -102,6 +112,36 @@ READ8_MEMBER(tv912_state::keyboard_r)
return result;
}
READ8_MEMBER(tv912_state::uart_status_r)
{
m_uart->set_input_pin(AY31015_SWE, 0);
u8 status = m_uart->get_output_pin(AY31015_DAV) << 0;
status |= m_uart->get_output_pin(AY31015_TBMT) << 1;
status |= m_uart->get_output_pin(AY31015_PE) << 2;
status |= m_uart->get_output_pin(AY31015_FE) << 3;
status |= BIT(m_jumpers->read(), offset) << 4;
status |= m_option->read();
m_uart->set_input_pin(AY31015_SWE, 1);
return status;
}
READ8_MEMBER(tv912_state::uart_data_r)
{
m_uart->set_input_pin(AY31015_RDAV, 0);
u8 data = m_uart->get_received_data();
m_uart->set_input_pin(AY31015_RDAV, 1);
return data;
}
WRITE8_MEMBER(tv912_state::uart_data_w)
{
m_uart->set_transmit_data(data);
}
WRITE_LINE_MEMBER(tv912_state::uart_reset_w)
{
}
WRITE8_MEMBER(tv912_state::output_40c)
{
// Bit 5: +FORCE BLANK
@ -141,8 +181,10 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( bank_map, 0, 8, tv912_state )
AM_RANGE(0x000, 0x0ff) AM_MIRROR(0x300) AM_RAM
AM_RANGE(0x400, 0x403) AM_MIRROR(0x3c0) AM_SELECT(0x030) AM_READWRITE(crtc_r, crtc_w)
AM_RANGE(0x407, 0x407) AM_MIRROR(0x3f0) AM_READ(uart_status_r)
AM_RANGE(0x408, 0x408) AM_MIRROR(0x3f3) AM_READWRITE(uart_data_r, uart_data_w)
AM_RANGE(0x40c, 0x40f) AM_MIRROR(0x3f0) AM_READ(keyboard_r)
AM_RANGE(0x40c, 0x40c) AM_MIRROR(0x3f0) AM_WRITE(output_40c)
AM_RANGE(0x40c, 0x40c) AM_MIRROR(0x3f3) AM_WRITE(output_40c)
AM_RANGE(0x800, 0xfff) AM_RAMBANK("dispram")
ADDRESS_MAP_END
@ -156,6 +198,25 @@ static INPUT_PORTS_START( switches )
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Funct") PORT_CODE(KEYCODE_LALT)
PORT_BIT(0x23, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("JUMPERS")
PORT_DIPNAME(0x08, 0x08, "Automatic CRLF") PORT_DIPLOCATION("S4:1") // or jumper W31
PORT_DIPSETTING(0x08, DEF_STR(Off))
PORT_DIPSETTING(0x00, DEF_STR(On))
PORT_DIPNAME(0x04, 0x04, "End of Send Character") PORT_DIPLOCATION("S4:2") // or jumper W32
PORT_DIPSETTING(0x04, "CR")
PORT_DIPSETTING(0x00, "EOT")
PORT_DIPNAME(0x02, 0x02, "Column 80 CRLF") PORT_DIPLOCATION("S4:3") // or jumper W33
PORT_DIPSETTING(0x00, DEF_STR(Off))
PORT_DIPSETTING(0x02, DEF_STR(On))
PORT_DIPNAME(0x01, 0x01, "Terminal Mode") PORT_DIPLOCATION("S4:4") // or jumper W34
PORT_DIPSETTING(0x01, "Extension")
PORT_DIPSETTING(0x00, "Page Print")
PORT_START("OPTION")
PORT_DIPUNKNOWN_DIPLOC(0x20, 0x20, "S4:5")
PORT_DIPUNKNOWN_DIPLOC(0x40, 0x40, "S4:6")
PORT_DIPUNKNOWN_DIPLOC(0x80, 0x80, "S4:7")
ADDRESS_MAP_END
static INPUT_PORTS_START( tv912b )
@ -557,6 +618,7 @@ MACHINE_CONFIG_START(tv912_state::tv912)
MCFG_MCS48_PORT_P1_OUT_CB(WRITE8(tv912_state, p1_w))
MCFG_MCS48_PORT_P2_OUT_CB(WRITE8(tv912_state, p2_w))
MCFG_MCS48_PORT_T1_IN_CB(DEVREADLINE("crtc", tms9927_device, bl_r)) MCFG_DEVCB_INVERT
MCFG_MCS48_PORT_PROG_OUT_CB(WRITELINE(tv912_state, uart_reset_w))
MCFG_DEVICE_ADD("bankdev", ADDRESS_MAP_BANK, 0)
MCFG_DEVICE_PROGRAM_MAP(bank_map)
@ -572,6 +634,8 @@ MACHINE_CONFIG_START(tv912_state::tv912)
MCFG_TMS9927_CHAR_WIDTH(CHAR_WIDTH)
MCFG_TMS9927_VSYN_CALLBACK(INPUTLINE("maincpu", MCS48_INPUT_IRQ))
MCFG_DEVICE_ADD("uart", AY51013, 0)
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("beep", BEEP, XTAL_23_814MHz / 7 / 11 / 256) // nominally 1200 Hz (same clock as for 75 baud setting)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)