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Diffstat (limited to 'src/devices/bus/msx_slot/ram.cpp')
-rw-r--r--src/devices/bus/msx_slot/ram.cpp22
1 files changed, 7 insertions, 15 deletions
diff --git a/src/devices/bus/msx_slot/ram.cpp b/src/devices/bus/msx_slot/ram.cpp
index 835a5551b92..92f9a57929d 100644
--- a/src/devices/bus/msx_slot/ram.cpp
+++ b/src/devices/bus/msx_slot/ram.cpp
@@ -6,7 +6,7 @@
DEFINE_DEVICE_TYPE(MSX_SLOT_RAM, msx_slot_ram_device, "msx_slot_ram", "MSX Internal RAM")
-msx_slot_ram_device::msx_slot_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+msx_slot_ram_device::msx_slot_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, MSX_SLOT_RAM, tag, owner, clock)
, msx_internal_slot_interface(mconfig, *this)
{
@@ -16,21 +16,13 @@ void msx_slot_ram_device::device_start()
{
m_ram.resize(m_size);
save_item(NAME(m_ram));
-}
-uint8_t msx_slot_ram_device::read(offs_t offset)
-{
- if ( offset >= m_start_address && offset < m_end_address )
- {
- return m_ram[ offset - m_start_address ];
- }
- return 0xFF;
-}
-
-void msx_slot_ram_device::write(offs_t offset, uint8_t data)
-{
- if ( offset >= m_start_address && offset < m_end_address )
+ u8 *ram = m_ram.data();
+ u32 start_address = m_start_address;
+ for (int i = m_start_address >> 14; i < 4 && i * 0x4000 < m_end_address; i++)
{
- m_ram[offset - m_start_address] = data;
+ page(i)->install_ram(start_address, std::min<u32>((i + 1) * 0x4000, m_end_address) - 1, ram);
+ start_address += 0x4000;
+ ram += 0x4000;
}
}