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Diffstat (limited to 'src/devices/bus/odyssey2/4in1.cpp')
-rw-r--r--src/devices/bus/odyssey2/4in1.cpp34
1 files changed, 30 insertions, 4 deletions
diff --git a/src/devices/bus/odyssey2/4in1.cpp b/src/devices/bus/odyssey2/4in1.cpp
index dfadbf2c1ab..30f10d1d1bf 100644
--- a/src/devices/bus/odyssey2/4in1.cpp
+++ b/src/devices/bus/odyssey2/4in1.cpp
@@ -15,13 +15,34 @@ Used in:
#include "emu.h"
#include "4in1.h"
-DEFINE_DEVICE_TYPE(O2_ROM_4IN1, o2_4in1_device, "o2_4in1", "Odyssey 2 Videopac 40")
-
+namespace {
//-------------------------------------------------
-// o2_4in1_device - constructor
+// initialization
//-------------------------------------------------
+class o2_4in1_device : public device_t, public device_o2_cart_interface
+{
+public:
+ o2_4in1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+protected:
+ virtual void device_start() override;
+
+ virtual void cart_init() override;
+
+ virtual u8 read_rom04(offs_t offset) override { return m_rom[offset + 0x400]; }
+ virtual u8 read_rom0c(offs_t offset) override { return m_rom[offset + 0xc00]; }
+
+ virtual void write_p1(u8 data) override { m_control = data; }
+ virtual void write_p2(u8 data) override { m_bank = data; }
+ virtual u8 io_read(offs_t offset) override;
+
+private:
+ u8 m_control = 0;
+ u8 m_bank = 0;
+};
+
o2_4in1_device::o2_4in1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) :
device_t(mconfig, O2_ROM_4IN1, tag, owner, clock),
device_o2_cart_interface(mconfig, *this)
@@ -35,7 +56,7 @@ void o2_4in1_device::device_start()
void o2_4in1_device::cart_init()
{
- if (m_rom.bytes() != 0x1000)
+ if (m_rom_size != 0x1000)
fatalerror("o2_4in1_device: ROM size must be 4KB\n");
}
@@ -51,3 +72,8 @@ u8 o2_4in1_device::io_read(offs_t offset)
else
return 0xff;
}
+
+} // anonymous namespace
+
+
+DEFINE_DEVICE_TYPE_PRIVATE(O2_ROM_4IN1, device_o2_cart_interface, o2_4in1_device, "o2_4in1", "Videopac 40 Cartridge")