// license:BSD-3-Clause // copyright-holders:Nigel Barnes /*************************************************************************** Slogger Click cartridge emulation http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Slogger_Click.html The Master version of the Click cartridge differs from the Electron version: Master 128 Electron ROM 16K 32K RAM (battery) 8K 32K The data lines D1 and D2 are swapped between edge connector and ROM/RAM. ***************************************************************************/ #include "emu.h" #include "click.h" namespace { class bbc_click_device : public device_t, public device_bbc_cart_interface { public: bbc_click_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, BBC_CLICK, tag, owner, clock) , device_bbc_cart_interface(mconfig, *this) { } DECLARE_INPUT_CHANGED_MEMBER(click_button); protected: // device_t overrides virtual void device_start() override ATTR_COLD { } virtual ioport_constructor device_input_ports() const override ATTR_COLD; // bbc_cart_interface overrides virtual uint8_t read(offs_t offset, int infc, int infd, int romqa, int oe, int oe2) override; virtual void write(offs_t offset, uint8_t data, int infc, int infd, int romqa, int oe, int oe2) override; }; //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- INPUT_PORTS_START(clickm) PORT_START("BUTTON") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("Click") PORT_CODE(KEYCODE_HOME) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(bbc_click_device::click_button), 0) INPUT_PORTS_END ioport_constructor bbc_click_device::device_input_ports() const { return INPUT_PORTS_NAME(clickm); } //------------------------------------------------- // read - cartridge data read //------------------------------------------------- uint8_t bbc_click_device::read(offs_t offset, int infc, int infd, int romqa, int oe, int oe2) { uint8_t data = 0xff; if (oe) { if (offset & 0x2000) { data = m_nvram[offset & 0x1fff]; } else { data = m_rom[(offset & 0x1fff) | (romqa << 13)]; } } return bitswap<8>(data, 7, 6, 5, 4, 3, 1, 2, 0); } //------------------------------------------------- // write - cartridge data write //------------------------------------------------- void bbc_click_device::write(offs_t offset, uint8_t data, int infc, int infd, int romqa, int oe, int oe2) { if (oe) { if (offset & 0x2000) { m_nvram[offset & 0x1fff] = bitswap<8>(data, 7, 6, 5, 4, 3, 1, 2, 0); } } } INPUT_CHANGED_MEMBER(bbc_click_device::click_button) { m_slot->irq_w(!newval); } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(BBC_CLICK, device_bbc_cart_interface, bbc_click_device, "bbc_click", "Slogger Click (Master 128) cartridge")