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(nw) multi8 : added cassette interface

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This commit is contained in:
Robbbert 2019-07-05 18:48:11 +10:00
parent 77edf6327e
commit 7ee50ffec7
1 changed files with 64 additions and 10 deletions
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74
src/mame/drivers/multi8.cpp
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@ -11,6 +11,7 @@
$f0b1 to 1 for now
- bitmap B/W mode is untested
- keyboard
- check cassette with real software
****************************************************************************/
@ -23,6 +24,7 @@
#include "machine/pic8259.h"
#include "machine/timer.h"
#include "machine/upd765.h"
#include "imagedev/cassette.h"
#include "sound/2203intf.h"
#include "sound/beep.h"
#include "video/mc6845.h"
@ -40,6 +42,8 @@ public:
, m_p_chargen(*this, "chargen")
, m_ppi(*this, "ppi")
, m_crtc(*this, "crtc")
, m_uart(*this, "uart")
, m_cass(*this, "cassette")
, m_beeper(*this, "beeper")
, m_palette(*this, "palette")
, m_aysnd(*this, "aysnd")
@ -63,10 +67,12 @@ private:
DECLARE_READ8_MEMBER(ay8912_0_r);
DECLARE_READ8_MEMBER(ay8912_1_r);
TIMER_DEVICE_CALLBACK_MEMBER(keyboard_callback);
TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
DECLARE_WRITE_LINE_MEMBER(kansas_w);
MC6845_UPDATE_ROW(crtc_update_row);
void multi8_io(address_map &map);
void multi8_mem(address_map &map);
void io_map(address_map &map);
void mem_map(address_map &map);
uint8_t *m_p_vram;
uint8_t *m_p_wram;
@ -80,6 +86,8 @@ private:
uint8_t m_pen_clut[8];
uint8_t m_bw_mode;
uint16_t m_knj_addr;
u8 m_cass_data[4];
bool m_cassbit, m_cassold;
virtual void machine_start() override;
virtual void machine_reset() override;
virtual void video_start() override;
@ -87,6 +95,8 @@ private:
required_region_ptr<u8> m_p_chargen;
required_device<i8255_device> m_ppi;
required_device<mc6845_device> m_crtc;
required_device<i8251_device> m_uart;
required_device<cassette_image_device> m_cass;
required_device<beep_device> m_beeper;
required_device<palette_device> m_palette;
required_device<ay8910_device> m_aysnd;
@ -291,7 +301,44 @@ WRITE8_MEMBER( multi8_state::kanji_w )
m_knj_addr = (offset == 0) ? (m_knj_addr & 0xff00) | (data & 0xff) : (m_knj_addr & 0x00ff) | (data << 8);
}
void multi8_state::multi8_mem(address_map &map)
WRITE_LINE_MEMBER( multi8_state::kansas_w )
{
// incoming @19200Hz
u8 twobit = m_cass_data[3] & 3;
if (state)
{
if (twobit == 0)
m_cassold = m_cassbit;
if (m_cassold)
m_cass->output(BIT(m_cass_data[3], 2) ? -1.0 : +1.0); // 2400Hz
else
m_cass->output(BIT(m_cass_data[3], 3) ? -1.0 : +1.0); // 1200Hz
m_cass_data[3]++;
}
m_uart->write_txc(state);
m_uart->write_rxc(state);
}
TIMER_DEVICE_CALLBACK_MEMBER( multi8_state::kansas_r )
{
/* cassette - turn 1200/2400Hz to a bit */
m_cass_data[1]++;
uint8_t cass_ws = (m_cass->input() > +0.04) ? 1 : 0;
if (cass_ws != m_cass_data[0])
{
m_cass_data[0] = cass_ws;
m_uart->write_rxd((m_cass_data[1] < 12) ? 1 : 0);
m_cass_data[1] = 0;
}
}
void multi8_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x7fff).rom();
@ -299,7 +346,7 @@ void multi8_state::multi8_mem(address_map &map)
map(0xc000, 0xffff).ram();
}
void multi8_state::multi8_io(address_map &map)
void multi8_state::io_map(address_map &map)
{
// ADDRESS_MAP_UNMAP_HIGH
map.global_mask(0xff);
@ -564,14 +611,15 @@ void multi8_state::machine_reset()
{
m_beeper->set_state(0);
m_mcu_init = 0;
m_uart->write_cts(0);
}
void multi8_state::multi8(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, XTAL(4'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &multi8_state::multi8_mem);
m_maincpu->set_addrmap(AS_IO, &multi8_state::multi8_io);
m_maincpu->set_addrmap(AS_PROGRAM, &multi8_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &multi8_state::io_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
@ -605,11 +653,17 @@ void multi8_state::multi8(machine_config &config)
m_ppi->out_pb_callback().set(FUNC(multi8_state::portb_w));
m_ppi->out_pc_callback().set(FUNC(multi8_state::portc_w));
clock_device &uart_clock(CLOCK(config, "uart_clock", 153600));
uart_clock.signal_handler().set("uart", FUNC(i8251_device::write_txc));
uart_clock.signal_handler().append("uart", FUNC(i8251_device::write_rxc));
clock_device &uart_clock(CLOCK(config, "uart_clock", 19200));
uart_clock.signal_handler().set(FUNC(multi8_state::kansas_w));
TIMER(config, "kansas_r").configure_periodic(FUNC(multi8_state::kansas_r), attotime::from_hz(40000));
CASSETTE(config, m_cass);
m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
I8251(config, m_uart, 0); // for cassette
m_uart->txd_handler().set([this] (bool state) { m_cassbit = state; });
I8251(config, "uart", 0); // for cassette
PIT8253(config, "pit", 0);
PIC8259(config, "pic", 0);