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diff --git a/src/mame/drivers/pv9234.cpp b/src/mame/drivers/pv9234.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+/***************************************************************************
+
+PowerVu D9234 STB (c) 1997 Scientific Atlanta
+
+20-mar-2010 skeleton driver
+
+http://www.vetrun.net/forums/showthread.php?t=395
+http://colibri.net63.net/powervu.htm
+http://www.growl.de/d9234/
+
+Google 'powervu 9234' for plenty more info.
+
+Meant for payTV providers to decrypt signals from the satellite and pump
+them out on a local cable network. The powervu encryption is very secure.
+
+There is a menu system, and with the right equipment, many secrets can
+be found!
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/arm7/arm7.h"
+
+
+class pv9234_state : public driver_device
+{
+public:
+ pv9234_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_p_ram(*this, "p_ram"),
+ m_maincpu(*this, "maincpu") { }
+
+ DECLARE_WRITE32_MEMBER(debug_w);
+ DECLARE_WRITE32_MEMBER(debug1_w);
+ DECLARE_WRITE32_MEMBER(debug2_w);
+ required_shared_ptr<UINT32> m_p_ram;
+ virtual void machine_reset();
+ virtual void video_start();
+ UINT32 screen_update_pv9234(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ required_device<cpu_device> m_maincpu;
+};
+
+
+/*
+This is the serial output to a terminal, used for debugging.
+The boot process goes something like this:
+
+Start
+
+Config: 0x00001080 (Max Config: 00003C80)
+MV 00000004.00000003
+DL Avail
+IOP Com. O.K. 00000004
+Check CRC ...
+CRC O.K.
+Launch App
+**************
+* Ver 2.05 *
+**************
+Compiled by: FURLANO
+Date & time: Nov 3 1997, 15:34:29
+All printing enabled. Press space bar to toggle on/off.
+Time stamping enabled. Press 't' to turn on/off.
+Press 'o' to toggle printing of MPEG Xport error messages.
+*/
+WRITE32_MEMBER( pv9234_state::debug_w )
+{
+ if (data)
+ {
+ printf("%02x %c\n",data,data); // this prints 'Start' to the console.
+ logerror("debug=%02x %c\n",data,data);
+ }
+}
+
+WRITE32_MEMBER( pv9234_state::debug1_w )
+{
+ UINT8 i,j;
+ if (data)
+ {
+ for (i = 0; i < 4; i++)
+ {
+ j = (data & 0xff000000) >> 24;
+ data <<= 8;
+// printf("%c",j); // this prints 'OFF' to the console.
+ logerror("debug1=%02x %c\n",j,j);
+ }
+// printf("\n");
+ }
+}
+
+WRITE32_MEMBER( pv9234_state::debug2_w )
+{
+ if (data)
+ logerror("debug2=%02x\n",data); // ignore the huge amount of zeroes here
+}
+
+static ADDRESS_MAP_START(pv9234_map, AS_PROGRAM, 32, pv9234_state)
+ // AM_RANGE(0x00000000, 0x00000033) AM_WRITE something
+ // AM_RANGE(0x00000044, 0x00000047) AM_WRITE something
+ // AM_RANGE(0x00000060, 0x0000006b) AM_WRITE something
+ // AM_RANGE(0x00007000, 0x00007003) AM_WRITE something
+ // AM_RANGE(0x00008000, 0x00008003) AM_WRITE something
+ AM_RANGE(0x00008014, 0x00008017) AM_WRITE(debug1_w)
+ // AM_RANGE(0x00008020, 0x00008027) AM_WRITE something
+ AM_RANGE(0x000080c0, 0x000080c3) AM_WRITE(debug2_w)
+ AM_RANGE(0x000080cc, 0x000080cf) AM_WRITE(debug_w)
+ // AM_RANGE(0x000080d0, 0x000080d3) AM_WRITE something
+ AM_RANGE(0x0003e000, 0x0003efff) AM_RAM AM_SHARE("p_ram")
+ AM_RANGE(0x00000000, 0x0007ffff) AM_ROM AM_REGION("maincpu",0) //FLASH ROM!
+ AM_RANGE(0x00080000, 0x00087fff) AM_MIRROR(0x78000) AM_RAM AM_SHARE("share1")//mirror is a guess, writes a prg at 0xc0200 then it jumps at b0200 (!)
+ AM_RANGE(0xe0000000, 0xe0007fff) AM_MIRROR(0x0fff8000) AM_RAM AM_SHARE("share1")
+ AM_RANGE(0xffffff00, 0xffffffff) AM_RAM //i/o? stack ram?
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( pv9234 )
+INPUT_PORTS_END
+
+
+void pv9234_state::machine_reset()
+{
+ int i;
+
+ for(i=0;i<0x1000/4;i++)
+ m_p_ram[i] = 0;
+}
+
+void pv9234_state::video_start()
+{
+}
+
+UINT32 pv9234_state::screen_update_pv9234(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ return 0;
+}
+
+static MACHINE_CONFIG_START( pv9234, pv9234_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", ARM7, 4915000) //probably a more powerful clone.
+ MCFG_CPU_PROGRAM_MAP(pv9234_map)
+
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+ MCFG_SCREEN_SIZE(640, 480)
+ MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
+ MCFG_SCREEN_UPDATE_DRIVER(pv9234_state, screen_update_pv9234)
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( pv9234 )
+ ROM_REGION32_LE( 0x80000, "maincpu", ROMREGION_ERASE00 )
+ ROM_LOAD16_BYTE( "u19.bin", 0x00000, 0x20000, CRC(1e06b0c8) SHA1(f8047f7127919e73675375578bb9fcc0eed2178e))
+ ROM_LOAD16_BYTE( "u18.bin", 0x00001, 0x20000, CRC(924487dd) SHA1(fb1d7c9a813ded8c820589fa85ae72265a0427c7))
+ ROM_LOAD16_BYTE( "u17.bin", 0x40000, 0x20000, CRC(cac03650) SHA1(edd8aec6fed886d47de39ed4e127de0a93250a45))
+ ROM_LOAD16_BYTE( "u16.bin", 0x40001, 0x20000, CRC(bd07d545) SHA1(90a63af4ee82b0f7d0ed5f0e09569377f22dd98c))
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+SYST( 1997, pv9234, 0, 0, pv9234, pv9234, driver_device, 0, "Scientific Atlanta", "PowerVu D9234", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)