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bus/bbc/userport: Added SD Card, and SD Turbo interfaces (not working).
This commit is contained in:
Nigel Barnes
parent
3a49ac4301
commit
e0b3f53210
@ -774,6 +774,8 @@ if (BUSES["BBC_USERPORT"]~=null) then
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MAME_DIR .. "src/devices/bus/bbc/userport/palext.h",
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MAME_DIR .. "src/devices/bus/bbc/userport/pointer.cpp",
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MAME_DIR .. "src/devices/bus/bbc/userport/pointer.h",
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MAME_DIR .. "src/devices/bus/bbc/userport/sdcard.cpp",
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MAME_DIR .. "src/devices/bus/bbc/userport/sdcard.h",
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MAME_DIR .. "src/devices/bus/bbc/userport/usersplit.cpp",
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MAME_DIR .. "src/devices/bus/bbc/userport/usersplit.h",
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MAME_DIR .. "src/devices/bus/bbc/userport/voicebox.cpp",
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155
src/devices/bus/bbc/userport/sdcard.cpp
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155
src/devices/bus/bbc/userport/sdcard.cpp
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@ -0,0 +1,155 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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BBC Micro SD Card
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Original Interface Hardware
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===========================
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This is the original interface design, as conceived by Martin Mather
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in 2006.
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User Port SD Card
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(Master) (Slave)
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========= =======
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CB1/PB1 ==> S_CLK (Clock)
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CB2 <== S_MISO (Dout)
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PB0 ==> S_MOSI (Din)
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0V ==> S_SEL (Select)
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TurboMMC Interface Hardware
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===========================
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The TurboMMC hardware is a more complicated, as it uses PB[4:2] to
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control three buffers, providing two different operating modes.
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When PB[4:2] are 010, then the hardware is configured as above, and
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the interface is compatible with the original hardware.
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When PB[4:2] are 101, then the hardware is re-configured as:
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User Port SD Card
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(Master) (Slave)
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========= =======
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CB1/PB1 ==> S_CLK (Clock)
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n/c <== S_MISO (Dout)
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CB2 ==> S_MOSI (Din)
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0V ==> S_SEL (Select)
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TODO:
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- implement SR Mode 0 in via6522_device.
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- implement SPI Mode 0 in spi_sdcard_device.
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**********************************************************************/
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#include "emu.h"
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#include "sdcard.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(BBC_SDCARD, bbc_sdcard_device, "bbc_sdcard", "BBC Micro SD Card")
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DEFINE_DEVICE_TYPE(BBC_SDCARDT, bbc_sdcardt_device, "bbc_sdcardt", "BBC Micro Turbo SD Card")
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//-------------------------------------------------
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// device_add_mconfig - add device configuration
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//-------------------------------------------------
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void bbc_sdcard_device::device_add_mconfig(machine_config &config)
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{
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SPI_SDCARD(config, m_sdcard, 0);
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m_sdcard->spi_miso_callback().set([this](int state) { m_slot->cb2_w(state); });
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}
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void bbc_sdcardt_device::device_add_mconfig(machine_config &config)
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{
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SPI_SDCARD(config, m_sdcard, 0);
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m_sdcard->spi_miso_callback().set([this](int state) { if (!m_turbo) m_slot->cb2_w(state); });
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// bbc_sdcard_device - constructor
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//-------------------------------------------------
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bbc_sdcard_device::bbc_sdcard_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, type, tag, owner, clock)
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, device_bbc_userport_interface(mconfig, *this)
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, m_sdcard(*this, "sdcard")
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{
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}
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bbc_sdcard_device::bbc_sdcard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: bbc_sdcard_device(mconfig, BBC_SDCARD, tag, owner, clock)
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{
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}
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bbc_sdcardt_device::bbc_sdcardt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: bbc_sdcard_device(mconfig, BBC_SDCARDT, tag, owner, clock)
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, m_turbo(false)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void bbc_sdcard_device::device_start()
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{
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}
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void bbc_sdcardt_device::device_start()
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{
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save_item(NAME(m_turbo));
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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void bbc_sdcard_device::write_cb1(int state)
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{
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m_sdcard->spi_ss_w(1);
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m_sdcard->spi_clock_w(!state);
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}
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void bbc_sdcard_device::pb_w(uint8_t data)
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{
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m_sdcard->spi_ss_w(1);
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m_sdcard->spi_mosi_w(BIT(data, 0));
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m_sdcard->spi_clock_w(!BIT(data, 1));
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}
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void bbc_sdcardt_device::write_cb1(int state)
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{
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m_sdcard->spi_ss_w(1);
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m_sdcard->spi_clock_w(!state);
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}
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void bbc_sdcardt_device::write_cb2(int state)
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{
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if (m_turbo)
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{
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m_sdcard->spi_ss_w(1);
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m_sdcard->spi_mosi_w(state);
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}
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}
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void bbc_sdcardt_device::pb_w(uint8_t data)
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{
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m_turbo = (data & 0x1c) == 0x14;
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m_sdcard->spi_ss_w(1);
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m_sdcard->spi_clock_w(!BIT(data, 1));
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}
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77
src/devices/bus/bbc/userport/sdcard.h
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77
src/devices/bus/bbc/userport/sdcard.h
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@ -0,0 +1,77 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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BBC Micro SD Card
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**********************************************************************/
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#ifndef MAME_BUS_BBC_USERPORT_SDCARD_H
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#define MAME_BUS_BBC_USERPORT_SDCARD_H
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#pragma once
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#include "userport.h"
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#include "machine/spi_sdcard.h"
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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// ======================> bbc_sdcard_device
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class bbc_sdcard_device : public device_t, public device_bbc_userport_interface
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{
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public:
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// construction/destruction
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bbc_sdcard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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static constexpr feature_type unemulated_features() { return feature::MEDIA; }
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protected:
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bbc_sdcard_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
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// device-level overrides
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virtual void device_start() override;
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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual void pb_w(uint8_t data) override;
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virtual void write_cb1(int state) override;
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required_device<spi_sdcard_device> m_sdcard;
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};
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// ======================> bbc_sdcardt_device
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class bbc_sdcardt_device : public bbc_sdcard_device
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{
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public:
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// construction/destruction
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bbc_sdcardt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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protected:
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// device-level overrides
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virtual void device_start() override;
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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual void pb_w(uint8_t data) override;
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virtual void write_cb1(int state) override;
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virtual void write_cb2(int state) override;
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private:
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bool m_turbo;;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(BBC_SDCARD, bbc_sdcard_device)
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DECLARE_DEVICE_TYPE(BBC_SDCARDT, bbc_sdcardt_device)
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#endif // MAME_BUS_BBC_USERPORT_SDCARD_H
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@ -135,6 +135,7 @@ void bbc_userport_slot_device::write_cb2(int state)
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#include "m4000.h"
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#include "palext.h"
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#include "pointer.h"
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#include "sdcard.h"
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#include "usersplit.h"
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//#include "vci.h"
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#include "voicebox.h"
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@ -154,6 +155,8 @@ void bbc_userport_devices(device_slot_interface &device)
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device.option_add("lcd", BBC_LCD); /* Sprow LCD Display */
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device.option_add("m4000", BBC_M4000); /* Hybrid Music 4000 Keyboard */
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device.option_add("m512mouse", BBC_M512MOUSE); /* Acorn Mouse (provided with Master 512) */
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device.option_add("sdcard", BBC_SDCARD); /* SD Card */
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device.option_add("sdcardt", BBC_SDCARDT); /* Turbo SD Card */
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device.option_add("tracker", BBC_TRACKER); /* Marconi RB2 Tracker Ball / Acorn Tracker Ball */
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device.option_add("usersplit", BBC_USERSPLIT); /*User Port Splitter (Watford Electronics) */
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//device.option_add("vci", BBC_VCI); /* Video Camera Interface (Data Harvest) */
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