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// license:BSD-3-Clause
// copyright-holders:AJR
/*******************************************************************************
Skeleton driver for Intel MCS-51 System Design Kit (SDK-51).
*******************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/mcs51/mcs51.h"
#include "cpu/mcs48/mcs48.h"
//#include "imagedev/cassette.h"
#include "machine/bankdev.h"
#include "machine/i8155.h"
#include "machine/i8243.h"
#include "machine/i8251.h"
class sdk51_state : public driver_device
{
public:
sdk51_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_progmem(*this, "progmem")
, m_datamem(*this, "datamem")
, m_mem0(*this, "mem0")
, m_upi(*this, "upi")
, m_usart(*this, "usart")
, m_cycles(*this, "cycles")
, m_kb(*this, "KB%u", 0U)
{
}
void sdk51(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
void psen_map(address_map &map);
void movx_map(address_map &map);
void progmem_map(address_map &map);
void datamem_map(address_map &map);
void mem0_map(address_map &map);
u8 psen_r(offs_t offset);
u8 datamem_r(offs_t offset);
void datamem_w(offs_t offset, u8 data);
u8 brkmem_r(offs_t offset);
void brkmem_w(offs_t offset, u8 data);
u8 upibus_r();
void upibus_w(u8 data);
DECLARE_WRITE_LINE_MEMBER(display_clock_w);
DECLARE_WRITE_LINE_MEMBER(upiobf_w);
void serial_control_w(u8 data);
required_device<mcs51_cpu_device> m_maincpu;
required_device<address_map_bank_device> m_progmem;
required_device<address_map_bank_device> m_datamem;
required_device<address_map_bank_device> m_mem0;
required_device<upi41_cpu_device> m_upi;
required_device<i8251_device> m_usart;
required_region_ptr<u8> m_cycles;
required_ioport_array<7> m_kb;
bool m_upiobf = false;
u8 m_serial_control = 0;
u32 m_kdtime = 0;
bool m_display_clock = false;
};
u8 sdk51_state::psen_r(offs_t offset)
{
return m_progmem->read8(offset);
}
u8 sdk51_state::datamem_r(offs_t offset)
{
return m_datamem->read8(offset);
}
void sdk51_state::datamem_w(offs_t offset, u8 data)
{
m_datamem->write8(offset, data);
}
u8 sdk51_state::brkmem_r(offs_t offset)
{
return 1 | (m_upiobf ? 2 : 0);
}
void sdk51_state::brkmem_w(offs_t offset, u8 data)
{
m_mem0->set_bank(0);
}
u8 sdk51_state::upibus_r()
{
u8 result = 0xff;
if (!BIT(m_serial_control, 0))
result &= m_usart->read(BIT(m_serial_control, 2));
if (!BIT(m_upi->p2_r(), 6))
for (int n = 0; n < 7; n++)
if (BIT(m_kdtime, n))
result &= m_kb[n]->read();
return result;
}
void sdk51_state::upibus_w(u8 data)
{
if (!BIT(m_serial_control, 1))
m_usart->write(BIT(m_serial_control, 2), data);
}
void sdk51_state::serial_control_w(u8 data)
{
m_serial_control = data;
}
WRITE_LINE_MEMBER(sdk51_state::display_clock_w)
{
if (!m_display_clock && state)
m_kdtime = ((m_kdtime << 1) & 0xfffffe) | BIT(m_upi->p1_r(), 6);
m_display_clock = state;
}
WRITE_LINE_MEMBER(sdk51_state::upiobf_w)
{
if (m_upiobf != bool(state))
{
m_upiobf = state;
m_maincpu->set_input_line(MCS51_INT0_LINE, state ? ASSERT_LINE : CLEAR_LINE);
}
}
void sdk51_state::psen_map(address_map &map)
{
map(0x0000, 0xffff).r(FUNC(sdk51_state::psen_r));
}
void sdk51_state::movx_map(address_map &map)
{
map(0x0000, 0xffff).rw(FUNC(sdk51_state::datamem_r), FUNC(sdk51_state::datamem_w));
}
void sdk51_state::progmem_map(address_map &map)
{
map(0x0000, 0x1fff).m(m_mem0, FUNC(address_map_bank_device::amap8));
map(0x2000, 0x3fff).ram();
map(0xe000, 0xffff).rom().region("monitor", 0);
}
void sdk51_state::datamem_map(address_map &map)
{
progmem_map(map);
map(0xa000, 0xa001).mirror(0xffe).rw(m_upi, FUNC(upi41_cpu_device::upi41_master_r), FUNC(upi41_cpu_device::upi41_master_w));
map(0xb000, 0xb0ff).mirror(0x700).rw("io", FUNC(i8155_device::memory_r), FUNC(i8155_device::memory_w));
map(0xb800, 0xb807).mirror(0x7f8).rw("io", FUNC(i8155_device::io_r), FUNC(i8155_device::io_w));
map(0xc000, 0xdfff).rw(FUNC(sdk51_state::brkmem_r), FUNC(sdk51_state::brkmem_w));
}
void sdk51_state::mem0_map(address_map &map)
{
map(0x0000, 0x1fff).ram();
map(0x2000, 0x2fff).mirror(0x1000).rom().region("monitor", 0);
}
static INPUT_PORTS_START(sdk51)
PORT_START("KB0")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CHAR(UCHAR_SHIFT_1) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Control") PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x09) PORT_CODE(KEYCODE_TAB)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(0x1b) PORT_CODE(KEYCODE_ESC)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Rubout") PORT_CHAR(0x7f) PORT_CODE(KEYCODE_BACKSPACE)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(' ') PORT_CODE(KEYCODE_SPACE)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('@') PORT_CODE(KEYCODE_OPENBRACE)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
PORT_START("KB1")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('0') PORT_CHAR('\\') PORT_CODE(KEYCODE_0)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('1') PORT_CHAR('!') PORT_CODE(KEYCODE_1)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('2') PORT_CHAR('"') PORT_CODE(KEYCODE_2)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('3') PORT_CHAR('#') PORT_CODE(KEYCODE_3)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('4') PORT_CHAR('$') PORT_CODE(KEYCODE_4)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('5') PORT_CHAR('%') PORT_CODE(KEYCODE_5)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('6') PORT_CHAR('&') PORT_CODE(KEYCODE_6)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('7') PORT_CHAR('\'') PORT_CODE(KEYCODE_7)
PORT_START("KB2")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('8') PORT_CHAR('(') PORT_CODE(KEYCODE_8)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('9') PORT_CHAR(')') PORT_CODE(KEYCODE_9)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('-') PORT_CHAR('=') PORT_CODE(KEYCODE_MINUS)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(';') PORT_CHAR('+') PORT_CODE(KEYCODE_COLON)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(':') PORT_CHAR('*') PORT_CODE(KEYCODE_QUOTE)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('/') PORT_CHAR('?') PORT_CODE(KEYCODE_SLASH)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR(']') PORT_CODE(KEYCODE_STOP)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR(',') PORT_CHAR('[') PORT_CODE(KEYCODE_COMMA)
PORT_START("KB3")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('A') PORT_CODE(KEYCODE_A)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('B') PORT_CODE(KEYCODE_B)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('C') PORT_CODE(KEYCODE_C)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('D') PORT_CODE(KEYCODE_D)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('E') PORT_CODE(KEYCODE_E)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('F') PORT_CODE(KEYCODE_F)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('G') PORT_CODE(KEYCODE_G)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('H') PORT_CODE(KEYCODE_H)
PORT_START("KB4")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('I') PORT_CODE(KEYCODE_I)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('J') PORT_CODE(KEYCODE_J)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('K') PORT_CODE(KEYCODE_K)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('L') PORT_CODE(KEYCODE_L)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('M') PORT_CODE(KEYCODE_M)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('N') PORT_CODE(KEYCODE_N)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('O') PORT_CODE(KEYCODE_O)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('P') PORT_CODE(KEYCODE_P)
PORT_START("KB5")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('Q') PORT_CODE(KEYCODE_Q)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('R') PORT_CODE(KEYCODE_R)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('S') PORT_CODE(KEYCODE_S)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('T') PORT_CODE(KEYCODE_T)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('U') PORT_CODE(KEYCODE_U)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('V') PORT_CODE(KEYCODE_V)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('W') PORT_CODE(KEYCODE_W)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('X') PORT_CODE(KEYCODE_X)
PORT_START("KB6")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('Y') PORT_CODE(KEYCODE_Y)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CHAR('Z') PORT_CODE(KEYCODE_Z)
PORT_BIT(0xfc, IP_ACTIVE_LOW, IPT_UNUSED)
INPUT_PORTS_END
void sdk51_state::machine_start()
{
m_upiobf = false;
m_serial_control = 0x0f;
m_display_clock = true;
save_item(NAME(m_upiobf));
save_item(NAME(m_serial_control));
save_item(NAME(m_kdtime));
save_item(NAME(m_display_clock));
}
void sdk51_state::machine_reset()
{
m_mem0->set_bank(1);
m_kdtime = 0;
}
void sdk51_state::sdk51(machine_config &config)
{
I8031(config, m_maincpu, 12_MHz_XTAL);
m_maincpu->set_addrmap(AS_PROGRAM, &sdk51_state::psen_map);
m_maincpu->set_addrmap(AS_IO, &sdk51_state::movx_map);
ADDRESS_MAP_BANK(config, m_progmem);
m_progmem->set_addrmap(0, &sdk51_state::progmem_map);
m_progmem->set_data_width(8);
m_progmem->set_addr_width(16);
ADDRESS_MAP_BANK(config, m_datamem);
m_datamem->set_addrmap(0, &sdk51_state::datamem_map);
m_datamem->set_data_width(8);
m_datamem->set_addr_width(16);
ADDRESS_MAP_BANK(config, m_mem0);
m_mem0->set_addrmap(0, &sdk51_state::mem0_map);
m_mem0->set_data_width(8);
m_mem0->set_addr_width(14);
m_mem0->set_stride(0x2000);
I8041A(config, m_upi, 6_MHz_XTAL);
m_upi->p1_in_cb().set(FUNC(sdk51_state::upibus_r));
m_upi->p1_out_cb().set(FUNC(sdk51_state::upibus_w));
m_upi->p2_in_cb().set("upiexp", FUNC(i8243_device::p2_r));
m_upi->p2_out_cb().set(FUNC(sdk51_state::display_clock_w)).bit(7);
m_upi->p2_out_cb().append(FUNC(sdk51_state::upiobf_w)).bit(4);
m_upi->p2_out_cb().append("upiexp", FUNC(i8243_device::p2_w)).mask(0x0f);
m_upi->prog_out_cb().set("upiexp", FUNC(i8243_device::prog_w));
m_upi->t1_in_cb().set(m_usart, FUNC(i8251_device::txrdy_r));
i8243_device &upiexp(I8243(config, "upiexp"));
upiexp.p4_out_cb().set(FUNC(sdk51_state::serial_control_w));
i8155_device &io(I8155(config, "io", 6_MHz_XTAL / 3));
io.out_to_callback().set(m_usart, FUNC(i8251_device::write_txc));
io.out_to_callback().append(m_usart, FUNC(i8251_device::write_txc));
I8251(config, m_usart, 6_MHz_XTAL / 3);
m_usart->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
m_usart->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
rs232.rxd_handler().set(m_usart, FUNC(i8251_device::write_rxd));
rs232.cts_handler().set(m_usart, FUNC(i8251_device::write_cts));
}
ROM_START(sdk51)
ROM_REGION(0x2000, "monitor", 0) // "SDK-51 MONITOR VER. 1.03"
ROM_LOAD("u59-e000.bin", 0x0000, 0x1000, CRC(cc6c7b05) SHA1(ead75920347ff19487e730e90e1e1f7207d44601))
ROM_LOAD("u60-f000.bin", 0x1000, 0x1000, CRC(da6e664d) SHA1(18416106307f37dba6dbb789f3d39fe6d5294755))
ROM_REGION(0x0400, "upi", 0)
ROM_LOAD("u41-8041a.bin", 0x000, 0x400, CRC(02f38b69) SHA1(ab2ac73b69b3297572583242ed5bd717eb116c37))
ROM_REGION(0x0200, "cycles", 0)
ROM_LOAD("u63-3622a.bin", 0x000, 0x200, CRC(85cbd498) SHA1(f0214b6d02d6d153b5fafd9adf5a23013373c9c4)) // pin 9 output stuck high but not used
ROM_END
COMP(1981, sdk51, 0, 0, sdk51, sdk51, sdk51_state, empty_init, "Intel", "MCS-51 System Design Kit", MACHINE_IS_SKELETON)
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