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bus/electron/cumana: Added support for Cumana floppy format.

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This commit is contained in:
Nigel Barnes 2023-09-01 22:11:43 +01:00
parent c106c577a2
commit 175a719fa9
2 changed files with 15 additions and 17 deletions
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27
src/devices/bus/electron/cart/cumana.cpp
View File

@ -7,8 +7,7 @@
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Cumana_FDsystem.html
TODO:
- add floppy format CDFS, and find original utilities disc
- confirm whether DRQ and INTRQ are connected
- find original utilities disc
- add spare ROM slot
**********************************************************************/
@ -32,6 +31,7 @@ DEFINE_DEVICE_TYPE(ELECTRON_CUMANA, electron_cumana_device, "electron_cumana", "
void electron_cumana_device::floppy_formats(format_registration &fr)
{
fr.add_mfm_containers();
fr.add(FLOPPY_CUMANA_DFS_FORMAT);
fr.add(FLOPPY_ACORN_SSD_FORMAT);
fr.add(FLOPPY_ACORN_DSD_FORMAT);
fr.add(FLOPPY_ACORN_ADFS_OLD_FORMAT);
@ -49,12 +49,10 @@ void cumana_floppies(device_slot_interface &device)
void electron_cumana_device::device_add_mconfig(machine_config &config)
{
/* fdc */
FD1793(config, m_fdc, DERIVED_CLOCK(1, 16)); // TODO: Not known whether DRQ and INTRQ are connected
FLOPPY_CONNECTOR(config, m_floppy0, cumana_floppies, "525qd", electron_cumana_device::floppy_formats).enable_sound(true);
FLOPPY_CONNECTOR(config, m_floppy1, cumana_floppies, nullptr, electron_cumana_device::floppy_formats).enable_sound(true);
FD1793(config, m_fdc, DERIVED_CLOCK(1, 16));
FLOPPY_CONNECTOR(config, m_floppy[0], cumana_floppies, "525qd", electron_cumana_device::floppy_formats).enable_sound(true);
FLOPPY_CONNECTOR(config, m_floppy[1], cumana_floppies, nullptr, electron_cumana_device::floppy_formats).enable_sound(true);
/* rtc */
MC146818(config, m_rtc, 32.768_kHz_XTAL);
m_rtc->irq().set(DEVICE_SELF_OWNER, FUNC(electron_cartslot_device::irq_w));
}
@ -71,8 +69,7 @@ electron_cumana_device::electron_cumana_device(const machine_config &mconfig, co
: device_t(mconfig, ELECTRON_CUMANA, tag, owner, clock)
, device_electron_cart_interface(mconfig, *this)
, m_fdc(*this, "fdc")
, m_floppy0(*this, "fdc:0")
, m_floppy1(*this, "fdc:1")
, m_floppy(*this, "fdc:%u", 0)
, m_rtc(*this, "rtc")
{
}
@ -85,6 +82,7 @@ void electron_cumana_device::device_start()
{
}
//-------------------------------------------------
// read - cartridge data read
//-------------------------------------------------
@ -145,7 +143,7 @@ void electron_cumana_device::write(offs_t offset, uint8_t data, int infc, int in
m_fdc->write(offset & 0x03, data);
break;
case 0x94:
wd1793_control_w(data);
control_w(data);
break;
case 0x98:
case 0x9c:
@ -167,13 +165,13 @@ void electron_cumana_device::write(offs_t offset, uint8_t data, int infc, int in
// IMPLEMENTATION
//**************************************************************************
void electron_cumana_device::wd1793_control_w(uint8_t data)
void electron_cumana_device::control_w(uint8_t data)
{
floppy_image_device *floppy = nullptr;
// bit 1, 2: drive select
if (BIT(data, 1)) floppy = m_floppy0->get_device();
if (BIT(data, 2)) floppy = m_floppy1->get_device();
if (BIT(data, 1)) floppy = m_floppy[0]->get_device();
if (BIT(data, 2)) floppy = m_floppy[1]->get_device();
m_fdc->set_floppy(floppy);
// bit 0: side select
@ -187,5 +185,6 @@ void electron_cumana_device::wd1793_control_w(uint8_t data)
if (floppy)
floppy->mon_w(!BIT(data, 4));
// bit 5: head load
// bit 5: head load timing
m_fdc->hlt_w(BIT(data, 5));
}

5
src/devices/bus/electron/cart/cumana.h
View File

@ -41,12 +41,11 @@ protected:
virtual void write(offs_t offset, uint8_t data, int infc, int infd, int romqa, int oe, int oe2) override;
private:
void wd1793_control_w(uint8_t data);
void control_w(uint8_t data);
static void floppy_formats(format_registration &fr);
required_device<fd1793_device> m_fdc;
required_device<floppy_connector> m_floppy0;
required_device<floppy_connector> m_floppy1;
required_device_array<floppy_connector, 2> m_floppy;
required_device<mc146818_device> m_rtc;
};