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diff --git a/src/mame/drivers/modellot.cpp b/src/mame/drivers/modellot.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic, Robbbert
+/**********************************************************************************
+
+ General Processor Modello T
+
+ 2012-12-10 Skeleton driver.
+ 2013-09-27 Added keyboard and cursor.
+
+ Made in Italy, a single board with numerous small daughter boards.
+ The 3 units (keyboard, disk drives, main unit) had wooden cabinets.
+ It had an inbuilt small green-screen CRT, like a Kaypro, and the RAM could
+ be 16, 32, or 48k. The FDC is a FD1791.
+
+ All the articles and doco (what there is of it) is all in Italian.
+
+***********************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "machine/keyboard.h"
+
+#define KEYBOARD_TAG "keyboard"
+
+class modellot_state : public driver_device
+{
+public:
+ modellot_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_p_videoram(*this, "videoram"),
+ m_maincpu(*this, "maincpu")
+ {
+ }
+
+ DECLARE_READ8_MEMBER(port77_r);
+ DECLARE_READ8_MEMBER(portff_r);
+ DECLARE_WRITE8_MEMBER(kbd_put);
+ UINT32 screen_update_modellot(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ required_shared_ptr<UINT8> m_p_videoram;
+private:
+ UINT8 m_term_data;
+ const UINT8 *m_p_chargen;
+ virtual void machine_reset();
+ required_device<cpu_device> m_maincpu;
+};
+
+static ADDRESS_MAP_START(modellot_mem, AS_PROGRAM, 8, modellot_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x0000, 0xbfff) AM_RAM // 48k ram
+ AM_RANGE(0xc000, 0xc3ff) AM_RAM AM_SHARE("videoram")
+ AM_RANGE(0xe000, 0xffff) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(modellot_io, AS_IO, 8, modellot_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x77, 0x77) AM_READ(port77_r)
+ AM_RANGE(0xff, 0xff) AM_READ(portff_r)
+ADDRESS_MAP_END
+
+
+/* Input ports */
+static INPUT_PORTS_START( modellot )
+INPUT_PORTS_END
+
+READ8_MEMBER( modellot_state::port77_r)
+{
+ return 4;
+}
+
+READ8_MEMBER( modellot_state::portff_r)
+{
+ UINT8 data = (m_term_data) ? m_term_data ^ 0x7f : 0xff;
+ m_term_data = 0;
+ return data;
+}
+
+WRITE8_MEMBER( modellot_state::kbd_put )
+{
+ m_term_data = data;
+}
+
+void modellot_state::machine_reset()
+{
+ m_term_data = 1;
+ m_p_chargen = memregion("chargen")->base();
+ m_maincpu->set_state_int(Z80_PC, 0xe000);
+}
+
+const gfx_layout modellot_charlayout =
+{
+ 8, 16, /* 8x16 characters */
+ 128, /* 128 characters */
+ 1, /* 1 bits per pixel */
+ {0}, /* no bitplanes; 1 bit per pixel */
+ {0,1,2,3,4,5,6,7},
+ {0, 8, 2 * 8, 3 * 8, 4 * 8, 5 * 8, 6 * 8, 7 * 8,
+ 0x400*8, 0x401*8, 0x402*8, 0x403*8, 0x404*8, 0x405*8, 0x406*8, 0x407*8},
+ 8*8 /* space between characters */
+};
+
+static GFXDECODE_START( modellot )
+ GFXDECODE_ENTRY( "chargen", 0x0000, modellot_charlayout, 0, 1 )
+GFXDECODE_END
+
+
+UINT32 modellot_state::screen_update_modellot(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ UINT8 y,ra,chr,gfx,inv;
+ UINT16 sy=0,ma=0,x;
+
+ for (y = 0; y < 16; y++)
+ {
+ for (ra = 0; ra < 16; ra++)
+ {
+ UINT16 *p = &bitmap.pix16(sy++);
+
+ for (x = 0; x < 64; x++)
+ {
+ inv = 0;
+
+ chr = m_p_videoram[x+ma];
+
+ if BIT(chr, 7) inv = 0xff;
+
+ chr &= 0x7f; // cursor
+
+ if (ra < 8)
+ gfx = m_p_chargen[(chr<<3) | ra ];
+ else
+ gfx = m_p_chargen[(chr<<3) | (ra-8) | 0x400];
+
+ gfx ^= inv;
+
+ /* Display a scanline of a character */
+ *p++ = BIT(gfx, 7);
+ *p++ = BIT(gfx, 6);
+ *p++ = BIT(gfx, 5);
+ *p++ = BIT(gfx, 4);
+ *p++ = BIT(gfx, 3);
+ *p++ = BIT(gfx, 2);
+ *p++ = BIT(gfx, 1);
+ *p++ = BIT(gfx, 0);
+ }
+ }
+ ma+=64;
+ }
+ return 0;
+}
+
+static MACHINE_CONFIG_START( modellot, modellot_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz)
+ MCFG_CPU_PROGRAM_MAP(modellot_mem)
+ MCFG_CPU_IO_MAP(modellot_io)
+
+ /* 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(64*8, 16*16)
+ MCFG_SCREEN_VISIBLE_AREA(0, 64*8-1, 0, 16*16-1)
+ MCFG_SCREEN_UPDATE_DRIVER(modellot_state, screen_update_modellot)
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_GFXDECODE_ADD("gfxdecode", "palette", modellot )
+ MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
+
+ /* Devices */
+ MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0)
+ MCFG_GENERIC_KEYBOARD_CB(WRITE8(modellot_state, kbd_put))
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( modellot )
+ ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ //ROM_LOAD( "fdc8119.u3", 0x0000, 0x0400, CRC(a8aee944) SHA1(f2cc598ed2e7a1a620e2f3f53c1a573965f6af26))
+ ROM_LOAD( "dt49-48.u1", 0xe000, 0x0400, CRC(2441c438) SHA1(832994a4214a744b7e19e5f74000c95ae65e3759))
+ ROM_LOAD( "ht20.u2", 0xe400, 0x0400, CRC(497c0495) SHA1(d03beebc4c31284729f6eac3bdf1fbf44adf7fff))
+
+ ROM_REGION( 0x0800, "chargen", ROMREGION_INVERT )
+ ROM_LOAD( "gcem1.u3", 0x0000, 0x0200, CRC(e7739268) SHA1(091ef69282abe657d5f38c70a572964f5200a1d5))
+ ROM_CONTINUE(0x400, 0x200)
+ ROM_LOAD( "gcem2.u4", 0x0200, 0x0200, CRC(6614330e) SHA1(880a541fb0ef6f37ac89439f9ea75a313c3e53d6))
+ ROM_CONTINUE(0x600, 0x200)
+ROM_END
+
+/* Driver */
+COMP( 1979, modellot, 0, 0, modellot, modellot, driver_device, 0, "General Processor", "Modello T", MACHINE_IS_SKELETON)