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diff --git a/src/mame/drivers/wy30p.cpp b/src/mame/drivers/wy30p.cpp
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+// license:BSD-3-Clause
+// copyright-holders:AJR
+/*******************************************************************************
+
+ Skeleton driver for Wyse WY-30+ terminal.
+
+ This low-end video terminal is the successor to the WY-30, whose control
+ board features an entirely different hardware configuration.
+
+*******************************************************************************/
+
+#include "emu.h"
+#include "cpu/mcs51/mcs51.h"
+#include "machine/eepromser.h"
+#include "screen.h"
+
+class wy30p_state : public driver_device
+{
+public:
+ wy30p_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_eeprom(*this, "eeprom")
+ , m_screen(*this, "screen")
+ {
+ }
+
+ void wy30p(machine_config &config);
+
+protected:
+ virtual void machine_start() override;
+ virtual void driver_start() override;
+
+private:
+ u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+ u8 p3_r();
+ u8 de00_r();
+
+ void prog_map(address_map &map);
+ void ext_map(address_map &map);
+
+ required_device<eeprom_serial_er5911_device> m_eeprom;
+ required_device<screen_device> m_screen;
+};
+
+
+void wy30p_state::machine_start()
+{
+}
+
+u32 wy30p_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+ return 0;
+}
+
+u8 wy30p_state::p3_r()
+{
+ return 0xdf | (m_eeprom->do_read() << 5);
+}
+
+u8 wy30p_state::de00_r()
+{
+ return m_screen->vblank() << 7; // probably not correct
+}
+
+void wy30p_state::prog_map(address_map &map)
+{
+ map(0x0000, 0x3fff).mirror(0xc000).rom().region("program", 0);
+}
+
+void wy30p_state::ext_map(address_map &map)
+{
+ map(0x0000, 0x1fff).ram();
+ map(0xa000, 0xa7ff).ram();
+ map(0xde00, 0xde00).mirror(0xff).r(FUNC(wy30p_state::de00_r));
+}
+
+
+static INPUT_PORTS_START(wy30p)
+INPUT_PORTS_END
+
+
+void wy30p_state::wy30p(machine_config &config)
+{
+ i8031_device &maincpu(I8031(config, "maincpu", 7.3728_MHz_XTAL));
+ maincpu.set_addrmap(AS_PROGRAM, &wy30p_state::prog_map);
+ maincpu.set_addrmap(AS_IO, &wy30p_state::ext_map);
+ maincpu.port_in_cb<3>().set(FUNC(wy30p_state::p3_r));
+ maincpu.port_out_cb<3>().set(m_eeprom, FUNC(eeprom_serial_er5911_device::cs_write)).bit(3);
+ maincpu.port_out_cb<3>().append(m_eeprom, FUNC(eeprom_serial_er5911_device::clk_write)).bit(4);
+ maincpu.port_out_cb<3>().append(m_eeprom, FUNC(eeprom_serial_er5911_device::di_write)).bit(5);
+
+ EEPROM_ER5911_8BIT(config, m_eeprom);
+
+ SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
+ m_screen->set_raw(31.2795_MHz_XTAL * 2 / 3, 1050, 0, 800, 331, 0, 300); // divider and dimensions guessed
+ m_screen->set_screen_update(FUNC(wy30p_state::screen_update));
+}
+
+
+// PCB: "© 1989 990710-01 REV.B1"
+// CPU: Intel P8031AH
+// Program EPROM: 250971-02 (M27128MFI) "© WYSE TECH 92' REV.A"
+// Nonvolatile memory: CSI CAT59C11P
+// RAM: TC5565APL-12, HY6116AP-15
+// QFP gate array: 211019-02 (Oki M76V020) "© WYSE,1989"
+// Jumper near gate array: "FONT SIZE" = "8Kx8" or "2Kx8" (J3)
+// XTALs: 31.2795 (dot clock?), 7.3728 (for CPU)
+// DB-25 connectors: "MDM" & "AUX"
+ROM_START(wy30p)
+ ROM_REGION(0x4000, "program", 0)
+ ROM_LOAD("250971-02.u4", 0x0000, 0x4000, CRC(3666549c) SHA1(23c432da2083df4b355daf566dd6514d1f9a7690))
+ROM_END
+
+void wy30p_state::driver_start()
+{
+ uint8_t *rom = memregion("program")->base();
+ for (offs_t base = 0x0000; base < 0x4000; base += 0x2000)
+ {
+ std::vector<uint8_t> orig(&rom[base], &rom[base + 0x2000]);
+
+ // Line swaps can be confusing...
+ for (offs_t offset = 0; offset < 0x2000; offset++)
+ rom[base | offset] = bitswap<8>(orig[bitswap<13>(offset, 8, 5, 0, 4, 3, 9, 7, 10, 11, 12, 2, 6, 1)], 3, 4, 5, 6, 7, 2, 1, 0);
+ }
+}
+
+COMP(1992, wy30p, 0, 0, wy30p, wy30p, wy30p_state, empty_init, "Wyse Technology", "WY-30+ (v1.8)", MACHINE_IS_SKELETON)