// license:BSD-3-Clause
// copyright-holders:Robbbert
/***************************************************************************
Altos 5-15
ToDo:
- When running MP/M, dir command crashes the system
****************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "imagedev/floppy.h"
#include "machine/z80daisy.h"
#include "machine/z80ctc.h"
#include "machine/z80pio.h"
#include "machine/z80sio.h"
#include "machine/z80dart.h"
#include "machine/z80dma.h"
#include "machine/wd_fdc.h"
#include "machine/clock.h"
#include "softlist.h"
#include "imagedev/snapquik.h"
class altos5_state : public driver_device
{
public:
altos5_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_pio0(*this, "pio0")
, m_dma (*this, "dma")
, m_fdc (*this, "fdc")
, m_floppy0(*this, "fdc:0")
, m_floppy1(*this, "fdc:1")
{ }
void altos5(machine_config &config);
void init_altos5();
DECLARE_QUICKLOAD_LOAD_MEMBER(quickload_cb);
private:
DECLARE_READ8_MEMBER(memory_read_byte);
DECLARE_WRITE8_MEMBER(memory_write_byte);
DECLARE_READ8_MEMBER(io_read_byte);
DECLARE_WRITE8_MEMBER(io_write_byte);
DECLARE_READ8_MEMBER(port08_r);
DECLARE_READ8_MEMBER(port09_r);
DECLARE_WRITE8_MEMBER(port08_w);
DECLARE_WRITE8_MEMBER(port09_w);
DECLARE_WRITE8_MEMBER(port14_w);
DECLARE_WRITE_LINE_MEMBER(busreq_w);
DECLARE_WRITE_LINE_MEMBER(fdc_intrq_w);
void io_map(address_map &map);
void mem_map(address_map &map);
uint8_t m_port08;
uint8_t m_port09;
uint8_t *m_p_prom;
bool m_ipl;
offs_t m_curr_bank;
floppy_image_device *m_floppy;
uint8_t convert(offs_t offset, bool state);
void setup_banks(uint8_t source);
virtual void machine_reset() override;
required_device<z80_device> m_maincpu;
required_device<z80pio_device> m_pio0;
required_device<z80dma_device> m_dma;
required_device<fd1797_device> m_fdc;
required_device<floppy_connector> m_floppy0;
required_device<floppy_connector> m_floppy1;
};
void altos5_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x0fff).bankr("bankr0").bankw("bankw0");
map(0x1000, 0x1fff).bankr("bankr1").bankw("bankw1");
map(0x2000, 0x2fff).bankr("bankr2").bankw("bankw2");
map(0x3000, 0x3fff).bankr("bankr3").bankw("bankw3");
map(0x4000, 0x4fff).bankr("bankr4").bankw("bankw4");
map(0x5000, 0x5fff).bankr("bankr5").bankw("bankw5");
map(0x6000, 0x6fff).bankr("bankr6").bankw("bankw6");
map(0x7000, 0x7fff).bankr("bankr7").bankw("bankw7");
map(0x8000, 0x8fff).bankr("bankr8").bankw("bankw8");
map(0x9000, 0x9fff).bankr("bankr9").bankw("bankw9");
map(0xa000, 0xafff).bankr("bankra").bankw("bankwa");
map(0xb000, 0xbfff).bankr("bankrb").bankw("bankwb");
map(0xc000, 0xcfff).bankr("bankrc").bankw("bankwc");
map(0xd000, 0xdfff).bankr("bankrd").bankw("bankwd");
map(0xe000, 0xefff).bankr("bankre").bankw("bankwe");
map(0xf000, 0xffff).bankr("bankrf").bankw("bankwf");
}
void altos5_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0x03).rw(m_dma, FUNC(z80dma_device::bus_r), FUNC(z80dma_device::bus_w));
map(0x04, 0x07).rw(m_fdc, FUNC(fd1797_device::read), FUNC(fd1797_device::write));
map(0x08, 0x0b).rw(m_pio0, FUNC(z80pio_device::read), FUNC(z80pio_device::write));
map(0x0c, 0x0f).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
map(0x10, 0x13).rw("pio1", FUNC(z80pio_device::read), FUNC(z80pio_device::write));
map(0x14, 0x17).w(FUNC(altos5_state::port14_w));
map(0x1c, 0x1f).rw("dart", FUNC(z80dart_device::ba_cd_r), FUNC(z80dart_device::ba_cd_w));
//map(0x20, 0x23) // Hard drive
map(0x2c, 0x2f).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w));
}
/* Input ports */
static INPUT_PORTS_START( altos5 )
INPUT_PORTS_END
uint8_t altos5_state::convert(offs_t offset, bool state)
{
uint8_t data = m_p_prom[offset];
// if IPL and /A12, point at rom
if (!state && m_ipl && !BIT(offset, 0))
data = 0x31;
else
// if WPRT point at nothing
if (state && BIT(data, 7))
data = 0x30;
// mask off wprt (no longer needed)
// normalise bank number (4x becomes 0x; 2x and 1x are already ok)
return data & 0x3f;
}
void altos5_state::setup_banks(uint8_t source)
{
offs_t offs,temp;
// WPRT | template | dma bank / cpu bank
if (source == 1) // use DMA banks only if BUSACK is asserted
offs = ((bitswap<8>(m_port09, 0, 0, 0, 5, 1, 2, 7, 6) << 4) & 0x1f0) ^ 0x100;
else
offs = ((bitswap<8>(m_port09, 0, 0, 0, 5, 1, 2, 4, 3) << 4) & 0x1f0) ^ 0x100;
temp = offs;
if ((source == 2) || (temp != m_curr_bank))
{
membank("bankr0")->set_entry(convert(offs++, 0));
membank("bankr1")->set_entry(convert(offs++, 0));
membank("bankr2")->set_entry(convert(offs++, 0));
membank("bankr3")->set_entry(convert(offs++, 0));
membank("bankr4")->set_entry(convert(offs++, 0));
membank("bankr5")->set_entry(convert(offs++, 0));
membank("bankr6")->set_entry(convert(offs++, 0));
membank("bankr7")->set_entry(convert(offs++, 0));
membank("bankr8")->set_entry(convert(offs++, 0));
membank("bankr9")->set_entry(convert(offs++, 0));
membank("bankra")->set_entry(convert(offs++, 0));
membank("bankrb")->set_entry(convert(offs++, 0));
membank("bankrc")->set_entry(convert(offs++, 0));
membank("bankrd")->set_entry(convert(offs++, 0));
membank("bankre")->set_entry(convert(offs++, 0));
membank("bankrf")->set_entry(convert(offs++, 0));
offs = temp;
membank("bankw0")->set_entry(convert(offs++, 1));
membank("bankw1")->set_entry(convert(offs++, 1));
membank("bankw2")->set_entry(convert(offs++, 1));
membank("bankw3")->set_entry(convert(offs++, 1));
membank("bankw4")->set_entry(convert(offs++, 1));
membank("bankw5")->set_entry(convert(offs++, 1));
membank("bankw6")->set_entry(convert(offs++, 1));
membank("bankw7")->set_entry(convert(offs++, 1));
membank("bankw8")->set_entry(convert(offs++, 1));
membank("bankw9")->set_entry(convert(offs++, 1));
membank("bankwa")->set_entry(convert(offs++, 1));
membank("bankwb")->set_entry(convert(offs++, 1));
membank("bankwc")->set_entry(convert(offs++, 1));
membank("bankwd")->set_entry(convert(offs++, 1));
membank("bankwe")->set_entry(convert(offs++, 1));
membank("bankwf")->set_entry(convert(offs++, 1));
}
m_curr_bank = temp;
}
void altos5_state::machine_reset()
{
m_curr_bank = 0;
m_port08 = 0;
m_port09 = 0;
m_ipl = 1;
setup_banks(2);
m_floppy = nullptr;
m_maincpu->reset();
}
static const z80_daisy_config daisy_chain_intf[] =
{
{ "dma" },
{ "pio0" },
{ "pio1" },
{ "ctc" },
{ "dart" },
{ "sio" },
{ nullptr }
};
// turns off IPL mode, removes boot rom from memory map
WRITE8_MEMBER( altos5_state::port14_w )
{
m_ipl = 0;
setup_banks(2);
}
READ8_MEMBER(altos5_state::memory_read_byte)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
return prog_space.read_byte(offset);
}
WRITE8_MEMBER(altos5_state::memory_write_byte)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
prog_space.write_byte(offset, data);
}
READ8_MEMBER(altos5_state::io_read_byte)
{
address_space& prog_space = m_maincpu->space(AS_IO);
return prog_space.read_byte(offset);
}
WRITE8_MEMBER(altos5_state::io_write_byte)
{
address_space& prog_space = m_maincpu->space(AS_IO);
prog_space.write_byte(offset, data);
}
WRITE_LINE_MEMBER( altos5_state::busreq_w )
{
// since our Z80 has no support for BUSACK, we assume it is granted immediately
m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state);
m_dma->bai_w(state); // tell dma that bus has been granted
setup_banks(state); // adjust banking for dma or cpu
}
/*
d0: L = a HD is present
d1: L = a 2nd hard drive is present
d2: unused configuration input (must be H to skip HD boot)
d3: selected floppy is single(L) or double sided(H)
d7: IRQ from FDC
*/
READ8_MEMBER( altos5_state::port08_r )
{
uint8_t data = m_port08 | 0x87;
if (m_floppy)
data |= ((uint8_t)m_floppy->twosid_r() << 3); // get number of sides
return data;
}
/*
d0: HD IRQ
*/
READ8_MEMBER( altos5_state::port09_r )
{
return m_port09 & 0xfe;
}
/*
d4: DDEN (H = double density)
d5: DS (H = drive 2)
d6: SS (H = side 2)
*/
WRITE8_MEMBER( altos5_state::port08_w )
{
m_port08 = data & 0x70;
m_floppy = nullptr;
if (BIT(data, 5))
m_floppy = m_floppy1->get_device();
else
m_floppy = m_floppy0->get_device();
m_fdc->set_floppy(m_floppy);
if (m_floppy)
{
m_floppy->mon_w(0);
m_floppy->ss_w(BIT(data, 6));
m_fdc->dden_w(!BIT(data, 4));
}
}
/*
d1, 2: Memory Map template selection (0 = diag; 1 = oasis; 2 = mp/m)
d3, 4: CPU bank select
d5: H = Write protect of common area
d6, 7: DMA bank select (not emulated)
*/
WRITE8_MEMBER( altos5_state::port09_w )
{
m_port09 = data;
setup_banks(2);
}
/***********************************************************
Quickload
This loads a .COM file to address 0x100 then jumps
there. Sometimes .COM has been renamed to .CPM to
prevent windows going ballistic. These can be loaded
as well.
************************************************************/
QUICKLOAD_LOAD_MEMBER(altos5_state::quickload_cb)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
if (quickload_size >= 0xfd00)
return image_init_result::FAIL;
setup_banks(2);
/* Avoid loading a program if CP/M-80 is not in memory */
if ((prog_space.read_byte(0) != 0xc3) || (prog_space.read_byte(5) != 0xc3))
{
machine_reset();
return image_init_result::FAIL;
}
/* Load image to the TPA (Transient Program Area) */
for (uint16_t i = 0; i < quickload_size; i++)
{
uint8_t data;
if (image.fread( &data, 1) != 1)
return image_init_result::FAIL;
prog_space.write_byte(i+0x100, data);
}
/* clear out command tail */
prog_space.write_byte(0x80, 0); prog_space.write_byte(0x81, 0);
/* Roughly set SP basing on the BDOS position */
m_maincpu->set_state_int(Z80_SP, 256 * prog_space.read_byte(7) - 300);
m_maincpu->set_pc(0x100); // start program
return image_init_result::PASS;
}
static void altos5_floppies(device_slot_interface &device)
{
device.option_add("525qd", FLOPPY_525_QD);
}
WRITE_LINE_MEMBER( altos5_state::fdc_intrq_w )
{
uint8_t data = m_port08 | ((uint8_t)(state) << 7);
m_pio0->port_a_write(data);
}
void altos5_state::init_altos5()
{
m_p_prom = memregion("proms")->base();
uint8_t *RAM = memregion("maincpu")->base();
membank("bankr0")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr1")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr2")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr3")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr4")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr5")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr6")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr7")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr8")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankr9")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankra")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankrb")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankrc")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankrd")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankre")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankrf")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw0")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw1")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw2")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw3")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw4")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw5")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw6")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw7")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw8")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankw9")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwa")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwb")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwc")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwd")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwe")->configure_entries(0, 50, &RAM[0], 0x1000);
membank("bankwf")->configure_entries(0, 50, &RAM[0], 0x1000);
}
void altos5_state::altos5(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, 8_MHz_XTAL / 2);
m_maincpu->set_addrmap(AS_PROGRAM, &altos5_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &altos5_state::io_map);
m_maincpu->set_daisy_config(daisy_chain_intf);
/* devices */
Z80DMA(config, m_dma, 8_MHz_XTAL / 2);
m_dma->out_busreq_callback().set(FUNC(altos5_state::busreq_w));
m_dma->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
// BAO, not used
m_dma->in_mreq_callback().set(FUNC(altos5_state::memory_read_byte));
m_dma->out_mreq_callback().set(FUNC(altos5_state::memory_write_byte));
m_dma->in_iorq_callback().set(FUNC(altos5_state::io_read_byte));
m_dma->out_iorq_callback().set(FUNC(altos5_state::io_write_byte));
Z80PIO(config, m_pio0, 8_MHz_XTAL / 2);
m_pio0->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_pio0->in_pa_callback().set(FUNC(altos5_state::port08_r));
m_pio0->out_pa_callback().set(FUNC(altos5_state::port08_w));
m_pio0->in_pb_callback().set(FUNC(altos5_state::port09_r));
m_pio0->out_pb_callback().set(FUNC(altos5_state::port09_w));
z80pio_device& pio1(Z80PIO(config, "pio1", 8_MHz_XTAL / 2));
pio1.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
z80dart_device& dart(Z80DART(config, "dart", 8_MHz_XTAL / 2));
// Channel A - console #3
// Channel B - printer
dart.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
z80sio_device& sio(Z80SIO(config, "sio", 8_MHz_XTAL / 2));
// Channel A - console #2
// WRDY connects to (altos5_state, fdc_intrq_w)
// Channel B - console #1
sio.out_txdb_callback().set("rs232", FUNC(rs232_port_device::write_txd));
sio.out_dtrb_callback().set("rs232", FUNC(rs232_port_device::write_dtr));
sio.out_rtsb_callback().set("rs232", FUNC(rs232_port_device::write_rts));
sio.out_int_callback().set_inputline("maincpu", INPUT_LINE_IRQ0);
z80ctc_device &ctc(Z80CTC(config, "ctc", 8_MHz_XTAL / 2));
ctc.intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
ctc.set_clk<0>(8_MHz_XTAL / 4); // 2MHz
ctc.set_clk<1>(8_MHz_XTAL / 4); // 2MHz
ctc.set_clk<2>(8_MHz_XTAL / 4); // 2MHz
ctc.zc_callback<0>().set("sio", FUNC(z80sio_device::rxtxcb_w)); // SIO Ch B
ctc.zc_callback<1>().set("dart", FUNC(z80dart_device::txca_w)); // Z80DART Ch A, SIO Ch A
ctc.zc_callback<1>().append("dart", FUNC(z80dart_device::rxca_w));
ctc.zc_callback<1>().append("sio", FUNC(z80sio_device::txca_w));
ctc.zc_callback<1>().append("sio", FUNC(z80sio_device::rxca_w));
ctc.zc_callback<2>().set("dart", FUNC(z80dart_device::rxtxcb_w)); // Z80DART Ch B
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal"));
rs232.rxd_handler().set("sio", FUNC(z80sio_device::rxb_w));
rs232.dcd_handler().set("sio", FUNC(z80sio_device::dcdb_w));
rs232.cts_handler().set("sio", FUNC(z80sio_device::ctsb_w));
FD1797(config, m_fdc, 8_MHz_XTAL / 8);
m_fdc->intrq_wr_callback().set(FUNC(altos5_state::fdc_intrq_w));
m_fdc->drq_wr_callback().set(m_dma, FUNC(z80dma_device::rdy_w));
FLOPPY_CONNECTOR(config, "fdc:0", altos5_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true);
FLOPPY_CONNECTOR(config, "fdc:1", altos5_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true);
SOFTWARE_LIST(config, "flop_list").set_original("altos5");
QUICKLOAD(config, "quickload", "com,cpm", attotime::from_seconds(3)).set_load_callback(FUNC(altos5_state::quickload_cb));
}
/* ROM definition */
ROM_START( altos5 ) // 00000-2FFFF = ram banks; 30000-30FFF wprt space; 31000-31FFF ROM
ROM_REGION( 0x32000, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD("2732.bin", 0x31000, 0x1000, CRC(15fdc7eb) SHA1(e15bdf5d5414ad56f8c4bb84edc6f967a5f01ba9)) // bios
ROM_REGION( 0x200, "proms", 0 )
ROM_LOAD("82s141.bin", 0x0000, 0x0200, CRC(35c8078c) SHA1(dce24374bfcc5d23959e2c03485d82a119c0c3c9)) // banking control
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1982, altos5, 0, 0, altos5, altos5, altos5_state, init_altos5, "Altos", "Altos 5-15", MACHINE_NOT_WORKING )