// license:BSD-3-Clause
// copyright-holders:Curt Coder
/*
Nokia Elektroniikka pj
Controller ILC 9534
FDC-Interface ILC 9530
Parts:
6,144 MHz xtal (CPU clock)
18,720 MHz xtal (pixel clock)
16 MHz xtal (FDC clock)
Intel I8085AP (CPU)
Intel 8253-5P (PIT)
Intel 8275P (CRTC)
Intel 8212P (I/OP)
Intel 8237A-5P (DMAC)
NEC uPD7220C (GDC)
NEC uPD7201P (MPSC=uart)
NEC uPD765 (FDC)
TMS4116-15 (16Kx4 DRAM)*4 = 32KB Video RAM for 7220
2164-6P (64Kx1 DRAM)*8 = 64KB Work RAM
DMA channels:
0 CRT
1 MPSC transmit
2 MPSC receive
3 FDC
Interrupts:
INTR MPSC INT
RST5.5 FDC IRQ
RST6.5 8212 INT
RST7.5 DMA EOP
*/
/*
TODO:
- NEC uPD7220 GDC
- accurate video timing
- floppy DRQ during RECALL = 0
- PCB layout
- NEC uPD7201 MPSC
- model M7 5MB hard disk
*/
#include "emu.h"
#include "includes/mikromik.h"
#include "softlist.h"
//#define VERBOSE 1
#include "logmacro.h"
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define MMU_IOEN 0x01
#define MMU_RAMEN 0x02
#define MMU_CE4 0x08
#define MMU_CE0 0x10
#define MMU_CE1 0x20
#define MMU_CE2 0x40
#define MMU_CE3 0x80
//**************************************************************************
// MEMORY MANAGEMENT UNIT
//**************************************************************************
//-------------------------------------------------
// read -
//-------------------------------------------------
READ8_MEMBER( mm1_state::read )
{
uint8_t data = 0;
uint8_t mmu = m_mmu_rom->base()[(m_a8 << 8) | (offset >> 8)];
if (mmu & MMU_IOEN)
{
switch ((offset >> 4) & 0x07)
{
case 0:
data = m_dmac->read(space, offset & 0x0f);
break;
case 1:
data = m_mpsc->cd_ba_r(space, offset & 0x03);
break;
case 2:
data = m_crtc->read(space, offset & 0x01);
break;
case 3:
data = m_pit->read(offset & 0x03);
break;
case 4:
data = m_iop->read(space, 0);
break;
case 5:
if (BIT(offset, 0))
{
data = m_fdc->fifo_r(space, 0, 0xff);
}
else
{
data = m_fdc->msr_r(space, 0, 0xff);
}
break;
case 7:
data = m_hgdc->read(space, offset & 0x01);
break;
}
}
else
{
if (mmu & MMU_RAMEN)
{
data = m_ram->pointer()[offset];
}
else if (!(mmu & MMU_CE0))
{
data = m_rom->base()[offset & 0x1fff];
}
else if (!(mmu & MMU_CE1))
{
data = m_rom->base()[0x2000 + (offset & 0x1fff)];
}
}
return data;
}
//-------------------------------------------------
// write -
//-------------------------------------------------
WRITE8_MEMBER( mm1_state::write )
{
uint8_t mmu = m_mmu_rom->base()[(m_a8 << 8) | (offset >> 8)];
if (mmu & MMU_IOEN)
{
switch ((offset >> 4) & 0x07)
{
case 0:
m_dmac->write(space, offset & 0x0f, data);
break;
case 1:
m_mpsc->cd_ba_w(space, offset & 0x03, data);
break;
case 2:
m_crtc->write(space, offset & 0x01, data);
break;
case 3:
m_pit->write(offset & 0x03, data);
break;
case 4:
m_iop->write(space, 0, data);
break;
case 5:
if (BIT(offset, 0))
{
m_fdc->fifo_w(space, 0, data, 0xff);
}
break;
case 6:
ls259_w(space, offset & 0x07, data);
break;
case 7:
m_hgdc->write(space, offset & 0x01, data);
break;
}
}
else
{
if (mmu & MMU_RAMEN)
{
m_ram->pointer()[offset] = data;
}
}
}
//-------------------------------------------------
// ls259_w -
//-------------------------------------------------
WRITE8_MEMBER( mm1_state::ls259_w )
{
int d = BIT(data, 0);
switch (offset)
{
case 0: // IC24 A8
LOG("IC24 A8 %u\n", d);
m_a8 = d;
break;
case 1: // RECALL
LOG("RECALL %u\n", d);
m_recall = d;
if (d) m_fdc->soft_reset();
break;
case 2: // _RV28/RX21
m_rx21 = d;
break;
case 3: // _TX21
m_tx21 = d;
break;
case 4: // _RCL
m_rcl = d;
break;
case 5: // _INTC
m_intc = d;
break;
case 6: // LLEN
LOG("LLEN %u\n", d);
m_llen = d;
break;
case 7: // MOTOR ON
LOG("MOTOR %u\n", d);
m_floppy0->mon_w(!d);
m_floppy1->mon_w(!d);
break;
}
}
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
//-------------------------------------------------
// ADDRESS_MAP( mm1_map )
//-------------------------------------------------
void mm1_state::mm1_map(address_map &map)
{
map(0x0000, 0xffff).rw(FUNC(mm1_state::read), FUNC(mm1_state::write));
}
//**************************************************************************
// INPUT PORTS
//**************************************************************************
//-------------------------------------------------
// INPUT_PORTS( mm1 )
//-------------------------------------------------
static INPUT_PORTS_START( mm1 )
// defined in machine/mm1kb.h
PORT_START("T5")
PORT_CONFNAME( 0x01, 0x00, "Floppy Drive Type")
PORT_CONFSETTING( 0x00, "640 KB" )
PORT_CONFSETTING( 0x01, "160/320 KB" )
INPUT_PORTS_END
//**************************************************************************
// DEVICE CONFIGURATION
//**************************************************************************
//-------------------------------------------------
// I8237_INTERFACE( dmac_intf )
//-------------------------------------------------
void mm1_state::update_tc()
{
int fdc_tc = m_tc && !m_dack3;
if (m_fdc_tc != fdc_tc)
{
m_fdc_tc = fdc_tc;
m_fdc->tc_w(m_fdc_tc);
}
}
WRITE_LINE_MEMBER( mm1_state::dma_hrq_w )
{
m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);
// Assert HLDA
m_dmac->hack_w(state);
}
READ8_MEMBER( mm1_state::mpsc_dack_r )
{
// clear data request
m_dmac->dreq2_w(CLEAR_LINE);
return 1;//m_mpsc->dtra_r();
}
WRITE8_MEMBER( mm1_state::mpsc_dack_w )
{
//m_mpsc->hai_w(data);
// clear data request
m_dmac->dreq1_w(CLEAR_LINE);
}
WRITE_LINE_MEMBER( mm1_state::dma_eop_w )
{
m_maincpu->set_input_line(I8085_RST75_LINE, state);
m_tc = state;
update_tc();
}
WRITE_LINE_MEMBER( mm1_state::dack3_w )
{
m_dack3 = state;
update_tc();
}
WRITE_LINE_MEMBER( mm1_state::itxc_w )
{
if (!m_intc)
{
m_mpsc->txca_w(state);
}
}
WRITE_LINE_MEMBER( mm1_state::irxc_w )
{
if (!m_intc)
{
m_mpsc->rxca_w(state);
}
}
WRITE_LINE_MEMBER( mm1_state::auxc_w )
{
m_mpsc->txcb_w(state);
m_mpsc->rxcb_w(state);
}
//-------------------------------------------------
// UPD7201
//-------------------------------------------------
WRITE_LINE_MEMBER( mm1_state::drq2_w )
{
if (state)
{
m_dmac->dreq2_w(ASSERT_LINE);
}
}
WRITE_LINE_MEMBER( mm1_state::drq1_w )
{
if (state)
{
m_dmac->dreq1_w(ASSERT_LINE);
}
}
READ_LINE_MEMBER( mm1_state::dsra_r )
{
return 1;
}
//-------------------------------------------------
// upd765_interface fdc_intf
//-------------------------------------------------
FLOPPY_FORMATS_MEMBER( mm1_state::floppy_formats )
FLOPPY_MM1_FORMAT
FLOPPY_FORMATS_END
/*
FLOPPY_FORMATS_MEMBER( mm2_state::floppy_formats )
FLOPPY_MM2_FORMAT
FLOPPY_FORMATS_END
*/
static void mm1_floppies(device_slot_interface &device)
{
device.option_add("525qd", FLOPPY_525_QD);
}
//**************************************************************************
// MACHINE INITIALIZATION
//**************************************************************************
//-------------------------------------------------
// MACHINE_START( mm1 )
//-------------------------------------------------
void mm1_state::machine_start()
{
// register for state saving
save_item(NAME(m_llen));
save_item(NAME(m_intc));
save_item(NAME(m_rx21));
save_item(NAME(m_tx21));
save_item(NAME(m_rcl));
save_item(NAME(m_recall));
}
void mm1_state::machine_reset()
{
address_space &program = m_maincpu->space(AS_PROGRAM);
// reset LS259
for (int i = 0; i < 8; i++)
{
ls259_w(program, i, 0);
}
// reset FDC
m_fdc->reset();
}
//**************************************************************************
// MACHINE DRIVERS
//**************************************************************************
//-------------------------------------------------
// MACHINE_CONFIG( mm1 )
//-------------------------------------------------
void mm1_state::mm1(machine_config &config)
{
// basic system hardware
I8085A(config, m_maincpu, 6.144_MHz_XTAL);
m_maincpu->set_addrmap(AS_PROGRAM, &mm1_state::mm1_map);
m_maincpu->in_sid_func().set(FUNC(mm1_state::dsra_r));
m_maincpu->out_sod_func().set(KB_TAG, FUNC(mm1_keyboard_device::bell_w));
config.m_perfect_cpu_quantum = subtag(I8085A_TAG);
// peripheral hardware
I8212(config, m_iop, 0);
m_iop->int_wr_callback().set_inputline(m_maincpu, I8085_RST65_LINE);
m_iop->di_rd_callback().set(KB_TAG, FUNC(mm1_keyboard_device::read));
AM9517A(config, m_dmac, 6.144_MHz_XTAL/2);
m_dmac->out_hreq_callback().set(FUNC(mm1_state::dma_hrq_w));
m_dmac->out_eop_callback().set(FUNC(mm1_state::dma_eop_w));
m_dmac->in_memr_callback().set(FUNC(mm1_state::read));
m_dmac->out_memw_callback().set(FUNC(mm1_state::write));
m_dmac->in_ior_callback<2>().set(FUNC(mm1_state::mpsc_dack_r));
m_dmac->in_ior_callback<3>().set(m_fdc, FUNC(upd765_family_device::mdma_r));
m_dmac->out_iow_callback<0>().set(m_crtc, FUNC(i8275_device::dack_w));
m_dmac->out_iow_callback<1>().set(FUNC(mm1_state::mpsc_dack_w));
m_dmac->out_iow_callback<3>().set(m_fdc, FUNC(upd765_family_device::mdma_w));
m_dmac->out_dack_callback<3>().set(FUNC(mm1_state::dack3_w));
PIT8253(config, m_pit, 0);
m_pit->set_clk<0>(6.144_MHz_XTAL/2/2);
m_pit->out_handler<0>().set(FUNC(mm1_state::itxc_w));
m_pit->set_clk<1>(6.144_MHz_XTAL/2/2);
m_pit->out_handler<1>().set(FUNC(mm1_state::irxc_w));
m_pit->set_clk<2>(6.144_MHz_XTAL/2/2);
m_pit->out_handler<2>().set(FUNC(mm1_state::auxc_w));
UPD765A(config, m_fdc, 16_MHz_XTAL/2, true, true);
m_fdc->intrq_wr_callback().set_inputline(m_maincpu, I8085_RST55_LINE);
m_fdc->drq_wr_callback().set(m_dmac, FUNC(am9517a_device::dreq3_w));
FLOPPY_CONNECTOR(config, UPD765_TAG ":0", mm1_floppies, "525qd", mm1_state::floppy_formats).enable_sound(true);
FLOPPY_CONNECTOR(config, UPD765_TAG ":1", mm1_floppies, "525qd", mm1_state::floppy_formats).enable_sound(true);
UPD7201(config, m_mpsc, 6.144_MHz_XTAL/2);
m_mpsc->out_txda_callback().set(m_rs232a, FUNC(rs232_port_device::write_txd));
m_mpsc->out_dtra_callback().set(m_rs232a, FUNC(rs232_port_device::write_dtr));
m_mpsc->out_rtsa_callback().set(m_rs232a, FUNC(rs232_port_device::write_rts));
m_mpsc->out_rxdrqa_callback().set(FUNC(mm1_state::drq2_w));
m_mpsc->out_txdrqa_callback().set(FUNC(mm1_state::drq1_w));
RS232_PORT(config, m_rs232a, default_rs232_devices, nullptr);
m_rs232a->cts_handler().set(m_mpsc, FUNC(z80dart_device::rxa_w));
RS232_PORT(config, m_rs232b, default_rs232_devices, nullptr);
RS232_PORT(config, m_rs232c, default_rs232_devices, nullptr);
m_rs232c->cts_handler().set(m_mpsc, FUNC(z80dart_device::ctsb_w));
mm1_keyboard_device &kb(MM1_KEYBOARD(config, KB_TAG, 2500)); // actual KBCLK is 6.144_MHz_XTAL/2/16
kb.kbst_wr_callback().set(m_iop, FUNC(i8212_device::stb_w));
// internal ram
RAM(config, RAM_TAG).set_default_size("64K");
// software lists
SOFTWARE_LIST(config, "flop_list").set_original("mm1_flop");
}
//-------------------------------------------------
// MACHINE_CONFIG( mm1m6 )
//-------------------------------------------------
void mm1_state::mm1m6(machine_config &config)
{
mm1(config);
// video hardware
mm1m6_video(config);
}
//-------------------------------------------------
// MACHINE_CONFIG( mm1m7 )
//-------------------------------------------------
void mm1_state::mm1m7(machine_config &config)
{
mm1(config);
// video hardware
mm1m6_video(config);
// TODO hard disk
}
//**************************************************************************
// ROMS
//**************************************************************************
//-------------------------------------------------
// ROM( mm1m6 )
//-------------------------------------------------
ROM_START( mm1m6 )
ROM_REGION( 0x4000, I8085A_TAG, 0 ) // BIOS
ROM_LOAD( "9081b.ic2", 0x0000, 0x2000, CRC(2955feb3) SHA1(946a6b0b8fb898be3f480c04da33d7aaa781152b) )
ROM_REGION( 0x200, "address", 0 ) // address decoder
ROM_LOAD( "720793a.ic24", 0x0000, 0x0200, CRC(deea87a6) SHA1(8f19e43252c9a0b1befd02fc9d34fe1437477f3a) )
ROM_REGION( 0x1000, "chargen", 0 ) // character generator
ROM_LOAD( "6807b.ic61", 0x0000, 0x1000, CRC(32b36220) SHA1(8fe7a181badea3f7e656dfaea21ee9e4c9baf0f1) )
ROM_END
//-------------------------------------------------
// ROM( mm1m7 )
//-------------------------------------------------
#define rom_mm1m7 rom_mm1m6
//**************************************************************************
// SYSTEM DRIVERS
//**************************************************************************
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1981, mm1m6, 0, 0, mm1m6, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M6", MACHINE_SUPPORTS_SAVE )
COMP( 1981, mm1m7, mm1m6, 0, mm1m7, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M7", MACHINE_SUPPORTS_SAVE )