summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/bbc/cart/click.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/bbc/cart/click.cpp')
-rw-r--r--src/devices/bus/bbc/cart/click.cpp113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/cart/click.cpp b/src/devices/bus/bbc/cart/click.cpp
new file mode 100644
index 00000000000..175de5eeae3
--- /dev/null
+++ b/src/devices/bus/bbc/cart/click.cpp
@@ -0,0 +1,113 @@
+// 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"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_CLICK, bbc_click_device, "bbc_click", "Slogger Click (Master 128) cartridge")
+
+
+//-------------------------------------------------
+// INPUT_PORTS( clickm )
+//-------------------------------------------------
+
+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, bbc_click_device, click_button, 0)
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor bbc_click_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME(clickm);
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_click_device - constructor
+//-------------------------------------------------
+
+bbc_click_device::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)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_click_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// 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);
+}