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systel100: Boot from floppy (nw)

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This commit is contained in:
AJR 2019-05-31 23:57:12 -04:00
parent ddff45d0a9
commit a8bdd97c96
1 changed files with 42 additions and 5 deletions
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47
src/mame/drivers/systel1.cpp
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@ -12,6 +12,7 @@
#include "emu.h"
#include "cpu/z80/z80.h"
#include "imagedev/floppy.h"
#include "machine/clock.h"
#include "machine/input_merger.h"
#include "machine/i8251.h"
@ -27,6 +28,8 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_dmac(*this, "dmac")
, m_fdc(*this, "fdc")
, m_floppy(*this, "fdc:0")
, m_rom(*this, "bootrom")
, m_chargen(*this, "chargen")
{
@ -43,6 +46,9 @@ private:
u8 memory_r(offs_t offset);
void memory_w(offs_t offset, u8 data);
u8 m1_r(offs_t offset);
void floppy_control_w(u8 data);
DECLARE_WRITE_LINE_MEMBER(rts_w);
DECLARE_WRITE_LINE_MEMBER(dtr_w);
I8275_DRAW_CHARACTER_MEMBER(draw_character);
@ -52,6 +58,8 @@ private:
required_device<cpu_device> m_maincpu;
required_device<i8257_device> m_dmac;
required_device<fd1797_device> m_fdc;
required_device<floppy_connector> m_floppy;
required_region_ptr<u8> m_rom;
required_region_ptr<u8> m_chargen;
@ -64,6 +72,7 @@ private:
void systel1_state::machine_start()
{
m_ram = make_unique_clear<u8[]>(0x10000);
m_fdc->set_floppy(m_floppy->get_device());
save_item(NAME(m_boot_read));
save_item(NAME(m_boot_execute));
@ -122,6 +131,22 @@ I8275_DRAW_CHARACTER_MEMBER(systel1_state::draw_character)
}
}
void systel1_state::floppy_control_w(u8 data)
{
if (m_floppy->get_device() != nullptr)
m_floppy->get_device()->mon_w(!BIT(data, 0));
}
WRITE_LINE_MEMBER(systel1_state::rts_w)
{
// beep? FDC reset?
}
WRITE_LINE_MEMBER(systel1_state::dtr_w)
{
// probably floppy-related
}
void systel1_state::mem_map(address_map &map)
{
map(0x0000, 0xffff).rw(FUNC(systel1_state::memory_r), FUNC(systel1_state::memory_w));
@ -138,8 +163,9 @@ void systel1_state::io_map(address_map &map)
map(0x00, 0x00).portr("JUMPERS");
map(0x10, 0x11).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x20, 0x29).rw(m_dmac, FUNC(i8257_device::read), FUNC(i8257_device::write));
map(0x30, 0x33).rw("fdc", FUNC(fd1797_device::read), FUNC(fd1797_device::write));
map(0x30, 0x33).rw(m_fdc, FUNC(fd1797_device::read), FUNC(fd1797_device::write));
map(0x40, 0x41).rw("crtc", FUNC(i8276_device::read), FUNC(i8276_device::write));
map(0x70, 0x70).w(FUNC(systel1_state::floppy_control_w));
}
static INPUT_PORTS_START(systel1)
@ -152,6 +178,11 @@ static INPUT_PORTS_START(systel1)
PORT_DIPSETTING(0x00, "60 Hz")
INPUT_PORTS_END
static void systel1_floppies(device_slot_interface &device)
{
device.option_add("525dd", FLOPPY_525_DD);
}
void systel1_state::systel1(machine_config &config)
{
Z80(config, m_maincpu, 2_MHz_XTAL); // Z8400A; clock not verified
@ -166,12 +197,14 @@ void systel1_state::systel1(machine_config &config)
m_dmac->out_hrq_cb().set(FUNC(systel1_state::hrq_w));
m_dmac->in_memr_cb().set(FUNC(systel1_state::memory_r));
m_dmac->out_memw_cb().set(FUNC(systel1_state::memory_w));
m_dmac->in_ior_cb<1>().set("fdc", FUNC(fd1797_device::data_r));
m_dmac->out_iow_cb<1>().set("fdc", FUNC(fd1797_device::data_w));
m_dmac->in_ior_cb<1>().set(m_fdc, FUNC(fd1797_device::data_r));
m_dmac->out_iow_cb<1>().set(m_fdc, FUNC(fd1797_device::data_w));
m_dmac->out_iow_cb<2>().set("crtc", FUNC(i8276_device::dack_w));
i8251_device &usart(I8251(config, "usart", 2_MHz_XTAL)); // AMD P8251A
usart.rxrdy_handler().set("mainint", FUNC(input_merger_device::in_w<0>));
usart.rts_handler().set(FUNC(systel1_state::rts_w));
usart.dtr_handler().set(FUNC(systel1_state::dtr_w));
clock_device &baudclock(CLOCK(config, "baudclock", 2_MHz_XTAL / 13)); // rate not verified, but also probably fixed
baudclock.signal_handler().set("usart", FUNC(i8251_device::write_rxc));
@ -188,8 +221,12 @@ void systel1_state::systel1(machine_config &config)
crtc.drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq2_w));
crtc.irq_wr_callback().set("mainint", FUNC(input_merger_device::in_w<1>));
fd1797_device &fdc(FD1797(config, "fdc", 2_MHz_XTAL));
fdc.drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq1_w));
FD1797(config, m_fdc, 2_MHz_XTAL / 2);
m_fdc->drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq1_w));
FLOPPY_CONNECTOR(config, m_floppy, systel1_floppies, "525dd", floppy_image_device::default_floppy_formats);
m_floppy->set_fixed(true);
m_floppy->enable_sound(true);
}
// RAM: 8x MCM6665AP20