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Diffstat (limited to 'src/devices/bus/archimedes/podule/io_morley.cpp')
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diff --git a/src/devices/bus/archimedes/podule/io_morley.cpp b/src/devices/bus/archimedes/podule/io_morley.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Morley Electronics User I2C Analogue mini-podule
+
+ http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/Morley_UserICAnalogue.html
+
+ Acorn AGA30 BBC I/O Podule
+
+ http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AGA30_AnalogueUserP.html
+
+**********************************************************************/
+
+#include "emu.h"
+#include "io_morley.h"
+#include "machine/6522via.h"
+#include "machine/input_merger.h"
+#include "machine/upd7002.h"
+#include "bus/bbc/analogue/analogue.h"
+#include "bus/bbc/userport/userport.h"
+
+
+namespace {
+
+// ======================> arc_bbcio_aga30_device
+
+class arc_bbcio_aga30_device :
+ public device_t,
+ public device_archimedes_podule_interface
+{
+ public:
+ // construction/destruction
+ arc_bbcio_aga30_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ // device_archimedes_podule_interface overrides
+ virtual void ioc_map(address_map &map) override;
+ virtual void memc_map(address_map &map) override;
+
+private:
+ required_memory_region m_podule_rom;
+ required_device<input_merger_device> m_irqs;
+ optional_device<bbc_analogue_slot_device> m_analog;
+
+ u8 m_rom_page;
+
+ int get_analogue_input(int channel_number);
+ void upd7002_eoc(int state);
+};
+
+
+void arc_bbcio_aga30_device::ioc_map(address_map &map)
+{
+ map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0x3800)]; })).umask32(0x000000ff);
+ map(0x2000, 0x203f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff);
+}
+
+void arc_bbcio_aga30_device::memc_map(address_map &map)
+{
+ map(0x1000, 0x100f).rw("upd7002", FUNC(upd7002_device::read), FUNC(upd7002_device::write)).umask32(0x000000ff);
+}
+
+
+//-------------------------------------------------
+// ROM( aga30 )
+//-------------------------------------------------
+
+ROM_START( aga30 )
+ ROM_REGION(0x4000, "podule_rom", 0)
+ ROM_SYSTEM_BIOS(0, "1", "First release 08-Mar-90")
+ ROMX_LOAD("morleyio_v2.01.bin", 0x0000, 0x4000, CRC(b149f631) SHA1(ed8d0caa478f030e11348b23e915897f27dcf153), ROM_BIOS(0))
+ROM_END
+
+const tiny_rom_entry *arc_bbcio_aga30_device::device_rom_region() const
+{
+ return ROM_NAME( aga30 );
+}
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void arc_bbcio_aga30_device::device_add_mconfig(machine_config &config)
+{
+ INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(state); });
+
+ via6522_device &via(MOS6522(config, "via", DERIVED_CLOCK(1, 4)));
+ via.irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>));
+ via.readpa_handler().set(m_analog, FUNC(bbc_analogue_slot_device::pb_r)).lshift(2);
+ via.writepa_handler().set([this](u8 data) { m_rom_page = data; });
+ via.readpb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_r));
+ via.writepb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_w));
+ via.cb1_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb1));
+ via.cb2_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb2));
+
+ bbc_userport_slot_device &userport(BBC_USERPORT_SLOT(config, "userport", bbc_userport_devices, nullptr));
+ userport.cb1_handler().set("via", FUNC(via6522_device::write_cb1));
+ userport.cb2_handler().set("via", FUNC(via6522_device::write_cb2));
+
+ upd7002_device &upd7002(UPD7002(config, "upd7002", DERIVED_CLOCK(1, 4)));
+ upd7002.set_get_analogue_callback(FUNC(arc_bbcio_aga30_device::get_analogue_input));
+ upd7002.set_eoc_callback(FUNC(arc_bbcio_aga30_device::upd7002_eoc));
+
+ BBC_ANALOGUE_SLOT(config, m_analog, bbc_analogue_devices, nullptr);
+ m_analog->lpstb_handler().set("via", FUNC(via6522_device::write_ca1));
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// arc_bbcio_aga30_device - constructor
+//-------------------------------------------------
+
+arc_bbcio_aga30_device::arc_bbcio_aga30_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, ARC_BBCIO_AGA30, tag, owner, clock)
+ , device_archimedes_podule_interface(mconfig, *this)
+ , m_podule_rom(*this, "podule_rom")
+ , m_irqs(*this, "irqs")
+ , m_analog(*this, "analogue")
+ , m_rom_page(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void arc_bbcio_aga30_device::device_start()
+{
+ save_item(NAME(m_rom_page));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void arc_bbcio_aga30_device::device_reset()
+{
+ m_rom_page = 0x00;
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+int arc_bbcio_aga30_device::get_analogue_input(int channel_number)
+{
+ return (0xff - m_analog->ch_r(channel_number)) << 8;
+}
+
+void arc_bbcio_aga30_device::upd7002_eoc(int state)
+{
+ m_irqs->in_w<1>(!state);
+}
+
+} // anonymous namespace
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE_PRIVATE(ARC_BBCIO_AGA30, device_archimedes_podule_interface, arc_bbcio_aga30_device, "arc_bbcio_aga30", "Acorn AGA30 BBC I/O Podule")