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(nw) argo: added uart and cassette skeleton, not working

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This commit is contained in:
Robbbert 2019-07-13 19:39:02 +10:00
parent 2bf07943c9
commit c267bde2e1
1 changed files with 58 additions and 3 deletions
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61
src/mame/drivers/argo.cpp
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@ -1,6 +1,6 @@
// license:BSD-3-Clause
// copyright-holders:Robbbert
/***************************************************************************
/***************************************************************************************
Argo
@ -19,12 +19,19 @@ Commands: same as UNIOR
ToDo:
- Add devices
- There is no obvious evidence of sound.
- Cassette UART on ports C1 and C3.
- Cassette
-- no info available but seems to be much the same as Unior, so code copied over
-- clock not hooked up, don't know where it comes from
-- unable to test as the i8251 device needs work to support syndet
****************************************************************************/
****************************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/i8251.h"
#include "imagedev/cassette.h"
//#include "sound/spkrdev.h"
#include "speaker.h"
#include "screen.h"
@ -36,6 +43,8 @@ public:
, m_maincpu(*this, "maincpu")
, m_p_videoram(*this, "videoram")
, m_p_chargen(*this, "chargen")
, m_uart(*this, "uart")
, m_cass(*this, "cassette")
{ }
void argo(machine_config &config);
@ -51,6 +60,7 @@ private:
DECLARE_WRITE8_MEMBER(argo_videoram_w);
DECLARE_READ8_MEMBER(argo_io_r);
DECLARE_WRITE8_MEMBER(argo_io_w);
DECLARE_WRITE_LINE_MEMBER(ctc_z1_w);
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void io_map(address_map &map);
@ -59,11 +69,14 @@ private:
required_device<cpu_device> m_maincpu;
required_shared_ptr<uint8_t> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
required_device<i8251_device> m_uart;
required_device<cassette_image_device> m_cass;
uint8_t m_framecnt;
uint8_t m_cursor_pos[3];
uint8_t m_p_cursor_pos;
bool m_ram_ctrl;
uint8_t m_scroll_ctrl;
bool m_txd, m_txe;
virtual void machine_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
};
@ -86,6 +99,12 @@ READ8_MEMBER(argo_state::argo_io_r)
switch (low_io)
{
case 0xC1: // uart data
return m_uart->data_r();
case 0xC3: // uart status
return m_uart->status_r();
case 0xA1: // keyboard
char kbdrow[6];
sprintf(kbdrow,"X%X",uint8_t(offset>>8));
@ -106,6 +125,14 @@ WRITE8_MEMBER(argo_state::argo_io_w)
switch (low_io)
{
case 0xC1: // uart data
m_uart->data_w(data);
break;
case 0xC3: // uart control
m_uart->control_w(data);
break;
case 0xA1: // prep scroll step 1
m_scroll_ctrl = (data == 0x61);
break;
@ -145,6 +172,21 @@ WRITE8_MEMBER(argo_state::argo_io_w)
}
}
// Untested. This needs to be driven by a 2400Hz clock.
WRITE_LINE_MEMBER(argo_state::ctc_z1_w)
{
// write
if (m_txe)
m_cass->output(1);
else
m_cass->output((m_txd ^ state) ? 1 : 0);
m_uart->write_txc(state);
// read - untested
m_uart->write_rxd((m_cass->input() > 0.04) ? 1 : 0);
m_uart->write_rxc(state);
}
void argo_state::mem_map(address_map &map)
@ -364,6 +406,19 @@ void argo_state::argo(machine_config &config)
screen.set_screen_update(FUNC(argo_state::screen_update));
screen.set_size(640, 250);
screen.set_visarea_full();
/* sound hardware */
SPEAKER(config, "mono").front_center();
//SPEAKER_SOUND(config, "speaker").add_route(ALL_OUTPUTS, "mono", 0.50);
CASSETTE(config, m_cass);
m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.15);
/* Devices */
I8251(config, m_uart, 0);
m_uart->txd_handler().set([this] (bool state) { m_txd = state; });
m_uart->txempty_handler().set([this] (bool state) { m_txe = state; });
}
/* ROM definition */