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author AJR <ajrhacker@users.noreply.github.com>2018-01-17 09:32:42 -0500
committer AJR <ajrhacker@users.noreply.github.com>2018-01-17 09:32:42 -0500
commit9f383f76ce6f00cc3320e5ba53dc323781e0077b (patch)
tree0fa03aff702aa39821ae8969b54c2a077153d9b2
parent91ea7b5174254969c97145671167852fdd91bafb (diff)
tv912.cpp: Start work on memory map (nw)
-rw-r--r--src/mame/drivers/tv912.cpp44
1 files changed, 44 insertions, 0 deletions
diff --git a/src/mame/drivers/tv912.cpp b/src/mame/drivers/tv912.cpp
index 21e9069fcfd..7f7c88592dd 100644
--- a/src/mame/drivers/tv912.cpp
+++ b/src/mame/drivers/tv912.cpp
@@ -16,6 +16,7 @@
#include "cpu/mcs48/mcs48.h"
//#include "bus/rs232/rs232.h"
//#include "machine/ay31015.h"
+#include "machine/bankdev.h"
//#include "video/tms9927.h"
#include "screen.h"
@@ -27,26 +28,62 @@ public:
tv912_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
+ , m_bankdev(*this, "bankdev")
+ , m_dispram_bank(*this, "dispram")
, m_p_chargen(*this, "chargen")
{ }
+ DECLARE_WRITE8_MEMBER(p2_w);
+
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
private:
+ virtual void machine_start() override;
+ virtual void machine_reset() override;
+
required_device<cpu_device> m_maincpu;
+ required_device<address_map_bank_device> m_bankdev;
+ required_memory_bank m_dispram_bank;
required_region_ptr<u8> m_p_chargen;
+
+ std::unique_ptr<u8[]> m_dispram;
};
+WRITE8_MEMBER(tv912_state::p2_w)
+{
+ m_bankdev->set_bank(data & 0x0f);
+}
+
u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
return 0;
}
+void tv912_state::machine_start()
+{
+ m_dispram = make_unique_clear<u8[]>(0x1000);
+ m_dispram_bank->configure_entries(0, 2, m_dispram.get(), 0x800);
+
+ save_pointer(NAME(m_dispram.get()), 0x1000);
+}
+
+void tv912_state::machine_reset()
+{
+ m_dispram_bank->set_entry(0);
+}
+
static ADDRESS_MAP_START( prog_map, AS_PROGRAM, 8, tv912_state )
AM_RANGE(0x000, 0xfff) AM_ROM AM_REGION("maincpu", 0)
ADDRESS_MAP_END
static ADDRESS_MAP_START( io_map, AS_IO, 8, tv912_state )
+ AM_RANGE(0x00, 0xff) AM_DEVICE("bankdev", address_map_bank_device, amap8)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( bank_map, 0, 8, tv912_state )
+ AM_RANGE(0x000, 0x0ff) AM_MIRROR(0x300) AM_RAM
+ //AM_RANGE(0x400, 0x403) AM_MIRROR(0x3c0) AM_SELECT(0x030) AM_READWRITE(crtc_r, crtc_w)
+ AM_RANGE(0x800, 0xfff) AM_RAMBANK("dispram")
ADDRESS_MAP_END
static INPUT_PORTS_START( tv912b )
@@ -59,6 +96,13 @@ static MACHINE_CONFIG_START( tv912 )
MCFG_CPU_ADD("maincpu", I8035, XTAL_23_814MHz / 4)
MCFG_CPU_PROGRAM_MAP(prog_map)
MCFG_CPU_IO_MAP(io_map)
+ MCFG_MCS48_PORT_P2_OUT_CB(WRITE8(tv912_state, p2_w))
+
+ MCFG_DEVICE_ADD("bankdev", ADDRESS_MAP_BANK, 0)
+ MCFG_DEVICE_PROGRAM_MAP(bank_map)
+ MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8)
+ MCFG_ADDRESS_MAP_BANK_ADDR_WIDTH(12)
+ MCFG_ADDRESS_MAP_BANK_STRIDE(0x100)
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_RAW_PARAMS(XTAL_23_814MHz, 105 * CHAR_WIDTH, 0, 80 * CHAR_WIDTH, 270, 0, 240)