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Diffstat (limited to 'src/mame/drivers/ie15.c')
-rw-r--r--src/mame/drivers/ie15.c663
1 files changed, 663 insertions, 0 deletions
diff --git a/src/mame/drivers/ie15.c b/src/mame/drivers/ie15.c
new file mode 100644
index 00000000000..405b33a2b5b
--- /dev/null
+++ b/src/mame/drivers/ie15.c
@@ -0,0 +1,663 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+ 15IE-00-013 Terminal
+
+ A serial (RS232 or current loop) green-screen terminal, mostly VT52
+ compatible (no Hold Screen mode and no graphics character set).
+
+ Alternate character set (selected by SO/SI chars) is Cyrillic.
+
+****************************************************************************/
+
+
+#include "emu.h"
+
+#include "bus/rs232/rs232.h"
+#include "cpu/ie15/ie15.h"
+#include "machine/ie15_kbd.h"
+#include "sound/beep.h"
+#include "ie15.lh"
+
+#define SCREEN_PAGE (80*48)
+
+#define IE_TRUE 0x80
+#define IE_FALSE 0
+
+#define IE15_TOTAL_HORZ 1000
+#define IE15_DISP_HORZ 800
+#define IE15_HORZ_START 200
+
+#define IE15_TOTAL_VERT 28*11
+#define IE15_DISP_VERT 25*11
+#define IE15_VERT_START 2*11
+#define IE15_STATUSLINE 11
+
+
+#define VERBOSE_DBG 1 /* general debug messages */
+
+#define DBG_LOG(N,M,A) \
+ do { \
+ if(VERBOSE_DBG>=N) \
+ { \
+ if( M ) \
+ logerror("%11.6f at %s: %-24s",machine().time().as_double(),machine().describe_context(),(char*)M ); \
+ logerror A; \
+ } \
+ } while (0)
+
+
+class ie15_state : public driver_device,
+ public device_serial_interface
+{
+public:
+ ie15_state(const machine_config &mconfig, device_type type, const char *tag) :
+ driver_device(mconfig, type, tag),
+ device_serial_interface(mconfig, *this),
+ m_maincpu(*this, "maincpu"),
+ m_beeper(*this, "beeper"),
+ m_rs232(*this, "rs232"),
+ m_screen(*this, "screen"),
+ m_io_keyboard(*this, "keyboard")
+ { }
+
+ virtual void machine_reset();
+ virtual void video_start();
+ UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ TIMER_DEVICE_CALLBACK_MEMBER( scanline_callback );
+ DECLARE_WRITE16_MEMBER( kbd_put );
+ DECLARE_PALETTE_INIT( ie15 );
+
+ DECLARE_WRITE_LINE_MEMBER( serial_rx_callback );
+ virtual void rcv_complete();
+ virtual void tra_callback();
+ virtual void tra_complete();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+ DECLARE_WRITE8_MEMBER( mem_w );
+ DECLARE_READ8_MEMBER( mem_r );
+ DECLARE_WRITE8_MEMBER( mem_addr_lo_w );
+ DECLARE_WRITE8_MEMBER( mem_addr_hi_w );
+ DECLARE_WRITE8_MEMBER( mem_addr_inc_w );
+ DECLARE_WRITE8_MEMBER( mem_addr_dec_w );
+ DECLARE_READ8_MEMBER( flag_r );
+ DECLARE_WRITE8_MEMBER( flag_w );
+ DECLARE_WRITE8_MEMBER( beep_w );
+ DECLARE_READ8_MEMBER( kb_r );
+ DECLARE_READ8_MEMBER( kb_ready_r );
+ DECLARE_READ8_MEMBER( kb_s_red_r );
+ DECLARE_READ8_MEMBER( kb_s_sdv_r );
+ DECLARE_READ8_MEMBER( kb_s_dk_r );
+ DECLARE_READ8_MEMBER( kb_s_dupl_r );
+ DECLARE_READ8_MEMBER( kb_s_lin_r );
+ DECLARE_WRITE8_MEMBER( kb_ready_w );
+ DECLARE_READ8_MEMBER( serial_tx_ready_r );
+ DECLARE_WRITE8_MEMBER( serial_w );
+ DECLARE_READ8_MEMBER( serial_rx_ready_r );
+ DECLARE_READ8_MEMBER( serial_r );
+ DECLARE_WRITE8_MEMBER( serial_speed_w );
+
+private:
+ TIMER_CALLBACK_MEMBER(ie15_beepoff);
+ void update_leds();
+ UINT32 draw_scanline(UINT16 *p, UINT16 offset, UINT8 scanline);
+ rectangle m_tmpclip;
+ bitmap_ind16 m_tmpbmp;
+ bitmap_ind16 m_offbmp;
+
+ const UINT8 *m_p_chargen;
+ UINT8 *m_p_videoram;
+ UINT8 m_long_beep;
+ UINT8 m_kb_control;
+ UINT8 m_kb_data;
+ UINT8 m_kb_flag0;
+ UINT8 m_kb_flag;
+ UINT8 m_kb_ruslat;
+ UINT8 m_latch;
+ struct {
+ UINT8 cursor;
+ UINT8 enable;
+ UINT8 line25;
+ UINT32 ptr1;
+ UINT32 ptr2;
+ } m_video;
+
+ UINT8 m_serial_rx_ready;
+ UINT8 m_serial_tx_ready;
+
+protected:
+ required_device<cpu_device> m_maincpu;
+ required_device<beep_device> m_beeper;
+ required_device<rs232_port_device> m_rs232;
+ required_device<screen_device> m_screen;
+ required_ioport m_io_keyboard;
+};
+
+READ8_MEMBER( ie15_state::mem_r ) {
+ UINT8 ret;
+
+ ret = m_p_videoram[m_video.ptr1];
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0 && m_video.ptr1 >= SCREEN_PAGE)
+ {
+ DBG_LOG(2,"memory",("R @ %03x == %02x\n", m_video.ptr1, ret));
+ }
+ m_video.ptr1++;
+ m_video.ptr1 &= 0xfff;
+ m_latch = 0;
+ return ret;
+}
+
+WRITE8_MEMBER( ie15_state::mem_w ) {
+ if ((m_latch ^= 1) == 0) {
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0 && m_video.ptr1 >= SCREEN_PAGE)
+ {
+ DBG_LOG(2,"memory",("W @ %03x <- %02x\n", m_video.ptr1, data));
+ }
+ m_p_videoram[m_video.ptr1++] = data;
+ m_video.ptr1 &= 0xfff;
+ }
+}
+
+WRITE8_MEMBER( ie15_state::mem_addr_inc_w ) {
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ {
+ DBG_LOG(2,"memory",("++ %03x\n", m_video.ptr1));
+ }
+ m_video.ptr1++;
+ m_video.ptr1 &= 0xfff;
+ if (m_video.enable)
+ m_video.ptr2 = m_video.ptr1;
+}
+
+WRITE8_MEMBER( ie15_state::mem_addr_dec_w ) {
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ {
+ DBG_LOG(2,"memory",("-- %03x\n", m_video.ptr1));
+ }
+ m_video.ptr1--;
+ m_video.ptr1 &= 0xfff;
+ if (m_video.enable)
+ m_video.ptr2 = m_video.ptr1;
+}
+
+WRITE8_MEMBER( ie15_state::mem_addr_lo_w ) {
+ UINT16 tmp = m_video.ptr1;
+
+ tmp &= 0xff0;
+ tmp |= ((data >> 4) & 0xf);
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ {
+ DBG_LOG(2,"memory",("lo %03x <- %02x = %03x\n", m_video.ptr1, data, tmp));
+ }
+ m_video.ptr1 = tmp;
+ if (m_video.enable)
+ m_video.ptr2 = tmp;
+}
+
+WRITE8_MEMBER( ie15_state::mem_addr_hi_w ) {
+ UINT16 tmp = m_video.ptr1;
+
+ tmp &= 0xf;
+ tmp |= (data << 4);
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ {
+ DBG_LOG(2,"memory",("hi %03x <- %02x = %03x\n", m_video.ptr1, data, tmp));
+ }
+ m_video.ptr1 = tmp;
+ if (m_video.enable)
+ m_video.ptr2 = tmp;
+}
+
+TIMER_CALLBACK_MEMBER(ie15_state::ie15_beepoff)
+{
+ machine().device<beep_device>("beeper")->set_state(0);
+}
+
+WRITE8_MEMBER( ie15_state::beep_w ) {
+ UINT16 length = (m_long_beep & IE_TRUE) ? 150 : 400;
+
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0)
+ {
+ DBG_LOG(1,"beep",("(%s)\n", m_long_beep ? "short" : "long"));
+ }
+ machine().scheduler().timer_set(attotime::from_msec(length), timer_expired_delegate(FUNC(ie15_state::ie15_beepoff),this));
+ machine().device<beep_device>("beeper")->set_state(1);
+}
+
+/* keyboard */
+
+// active high
+READ8_MEMBER( ie15_state::kb_r ) {
+ DBG_LOG(2,"keyboard",("R %02X '%c'\n", m_kb_data, m_kb_data < 0x20 ? ' ' : m_kb_data));
+ return m_kb_data;
+}
+
+// active low
+READ8_MEMBER( ie15_state::kb_ready_r ) {
+ m_kb_flag &= IE_TRUE;
+ if (m_kb_flag != m_kb_flag0) {
+ DBG_LOG(2,"keyboard",("? %c\n", m_kb_flag ? 'n' : 'y'));
+ m_kb_flag0 = m_kb_flag;
+ }
+ return m_kb_flag;
+}
+
+// active low
+WRITE8_MEMBER( ie15_state::kb_ready_w ) {
+ DBG_LOG(2,"keyboard",("clear ready\n"));
+ m_kb_flag = IE_TRUE | IE_KB_ACK;
+}
+
+
+// active high; active = interpret controls, inactive = display controls
+READ8_MEMBER( ie15_state::kb_s_red_r ) {
+ return m_io_keyboard->read() & IE_KB_RED ? IE_TRUE : 0;
+}
+
+// active high; active = setup mode
+READ8_MEMBER( ie15_state::kb_s_sdv_r ) {
+ return m_kb_control & IE_KB_SDV ? IE_TRUE : 0;
+}
+
+// active high; active = keypress detected on aux keypad
+READ8_MEMBER( ie15_state::kb_s_dk_r ) {
+ return m_kb_control & IE_KB_DK ? IE_TRUE : 0;
+}
+
+// active low; active = full duplex, inactive = half duplex
+READ8_MEMBER( ie15_state::kb_s_dupl_r ) {
+ return m_io_keyboard->read() & IE_KB_DUP ? IE_TRUE : 0;
+}
+
+// active high; active = on-line, inactive = local editing
+READ8_MEMBER( ie15_state::kb_s_lin_r ) {
+ return m_io_keyboard->read() & IE_KB_LIN ? IE_TRUE : 0;
+}
+
+/* serial port */
+
+void ie15_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ device_serial_interface::device_timer(timer, id, param, ptr);
+}
+
+WRITE_LINE_MEMBER( ie15_state::serial_rx_callback )
+{
+ device_serial_interface::rx_w(state);
+}
+
+void ie15_state::rcv_complete()
+{
+ receive_register_extract();
+ m_serial_rx_ready = IE_FALSE;
+}
+
+void ie15_state::tra_callback()
+{
+ UINT8 bit = transmit_register_get_data_bit();
+ m_rs232->write_txd(bit);
+}
+
+void ie15_state::tra_complete()
+{
+ m_serial_tx_ready = IE_TRUE;
+}
+
+// active low
+READ8_MEMBER( ie15_state::serial_rx_ready_r ) {
+ return m_serial_rx_ready;
+}
+
+// active high
+READ8_MEMBER( ie15_state::serial_tx_ready_r ) {
+ return m_serial_tx_ready;
+}
+
+// not called unless data are ready
+READ8_MEMBER( ie15_state::serial_r ) {
+ UINT8 data;
+
+ data = get_received_char();
+ m_serial_rx_ready = IE_TRUE;
+ DBG_LOG(1,"serial",("R %02X '%c'\n", data, data < 0x20?' ':data));
+ return data;
+}
+
+WRITE8_MEMBER( ie15_state::serial_w ) {
+ DBG_LOG(1,"serial",("W %02X '%c'\n", data, data < 0x20?' ':data));
+
+ m_serial_tx_ready = IE_FALSE;
+ transmit_register_setup(data);
+}
+
+WRITE8_MEMBER( ie15_state::serial_speed_w ) {
+ return;
+}
+
+READ8_MEMBER( ie15_state::flag_r ) {
+ UINT8 ret = 0;
+
+ switch (offset)
+ {
+ case 0: // hsync pulse (not hblank)
+ ret = m_screen->hpos() < IE15_HORZ_START;
+ break;
+ case 1: // marker scanline
+ ret = (m_screen->vpos() % 11) > 7;
+ break;
+ case 2: // vblank
+ ret = !m_screen->vblank();
+ break;
+ case 4:
+ ret = m_kb_ruslat;
+ break;
+ default:
+ break;
+ }
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0 && ret)
+ {
+ DBG_LOG(2,"flag",("read %d: %d\n", offset, ret));
+ }
+ return ret;
+}
+
+WRITE8_MEMBER( ie15_state::flag_w ) {
+ switch (offset)
+ {
+ case 0:
+ m_video.enable = data;
+ break;
+ case 1:
+ m_video.cursor = data;
+ break;
+ case 2:
+ m_long_beep = data;
+ break;
+ case 3:
+ m_video.line25 = data;
+ break;
+ case 4:
+ m_kb_ruslat = data;
+ break;
+ default:
+ break;
+ }
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0 && !offset)
+ {
+ DBG_LOG(2,"flag",("%sset %d\n", data?"":"re", offset));
+ }
+}
+
+static ADDRESS_MAP_START( ie15_mem, AS_PROGRAM, 8, ie15_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x0000, 0x0fff) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( ie15_io, AS_IO, 8, ie15_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(000, 000) AM_READWRITE(mem_r, mem_w) // 00h W: memory request, R: memory data [6.1.2.2]
+ AM_RANGE(001, 001) AM_READ(serial_rx_ready_r) AM_WRITENOP // 01h W: memory latch [6.1.2.2]
+ AM_RANGE(002, 002) AM_WRITE(mem_addr_hi_w) // 02h W: memory address high [6.1.2.2]
+ AM_RANGE(003, 003) AM_WRITE(mem_addr_lo_w) // 03h W: memory address low [6.1.2.2]
+ AM_RANGE(004, 004) AM_WRITE(mem_addr_inc_w) // 04h W: memory address counter + [6.1.2.2]
+ AM_RANGE(005, 005) AM_WRITE(mem_addr_dec_w) // 05h W: memory address counter - [6.1.2.2]
+ AM_RANGE(006, 006) AM_READWRITE(serial_r, serial_w) // 06h W: serial port data [6.1.5.4]
+// port 7 is handled in cpu core
+ AM_RANGE(010, 010) AM_READWRITE(serial_tx_ready_r, beep_w) // 08h W: speaker control [6.1.5.4]
+ AM_RANGE(011, 011) AM_READ(kb_r) // 09h R: keyboard data [6.1.5.2]
+ AM_RANGE(012, 012) AM_READ(kb_s_red_r) // 0Ah I: keyboard mode "RED" [6.1.5.2]
+ AM_RANGE(013, 013) AM_READ(kb_ready_r) // 0Bh R: keyboard data ready [6.1.5.2]
+ AM_RANGE(014, 014) AM_READWRITE(kb_s_sdv_r, serial_speed_w) // 0Ch W: serial port speed [6.1.3.1], R: keyboard mode "SDV" [6.1.5.2]
+ AM_RANGE(015, 015) AM_READWRITE(kb_s_dk_r, kb_ready_w) // 0Dh I: keyboard mode "DK" [6.1.5.2]
+ AM_RANGE(016, 016) AM_READ(kb_s_dupl_r) // 0Eh I: keyboard mode "DUPL" [6.1.5.2]
+ AM_RANGE(017, 017) AM_READ(kb_s_lin_r) // 0Fh I: keyboard mode "LIN" [6.1.5.2]
+// simulation of flag registers
+ AM_RANGE(020, 027) AM_READWRITE(flag_r, flag_w)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( ie15 )
+ PORT_START("keyboard")
+ PORT_DIPNAME(IE_KB_RED, IE_KB_RED, "RED (Interpret controls)")
+ PORT_DIPSETTING(0x00, "Off")
+ PORT_DIPSETTING(IE_KB_RED, "On")
+ PORT_DIPNAME(IE_KB_DUP, IE_KB_DUP, "DUP (Full duplex)")
+ PORT_DIPSETTING(0x00, "Off")
+ PORT_DIPSETTING(IE_KB_DUP, "On")
+ PORT_DIPNAME(IE_KB_LIN, IE_KB_LIN, "LIN (Online)")
+ PORT_DIPSETTING(0x00, "Off")
+ PORT_DIPSETTING(IE_KB_LIN, "On")
+INPUT_PORTS_END
+
+WRITE16_MEMBER( ie15_state::kbd_put )
+{
+ DBG_LOG(2,"keyboard",("W %02X<-%02X '%c' %02X (%c)\n", m_kb_data, data, 'x' /* data < 0x20 ? ' ' : (data & 255) */,
+ m_kb_flag, m_kb_flag ? 'n' : 'y'));
+ m_kb_control = (data >> 8) & 255;
+ // send new key only when firmware has processed previous one
+ if (m_kb_flag == IE_TRUE) {
+ m_kb_data = data & 255;
+ m_kb_flag = 0;
+ }
+}
+
+void ie15_state::machine_reset()
+{
+ memset(&m_video, 0, sizeof(m_video));
+ m_kb_ruslat = m_long_beep = m_kb_control = m_kb_data = m_kb_flag0 = 0;
+ m_kb_flag = IE_TRUE;
+
+ machine().device<beep_device>("beeper")->set_frequency(2400);
+ machine().device<beep_device>("beeper")->set_state(0);
+
+ m_serial_tx_ready = m_serial_rx_ready = IE_TRUE;
+ set_data_frame(1 /* start bits */, 8 /* data bits */, PARITY_NONE, STOP_BITS_1);
+ // device supports rates from 150 to 9600 baud but null_modem has hardcoded 9600
+ set_rate(9600);
+}
+
+void ie15_state::video_start()
+{
+ m_p_chargen = memregion("chargen")->base();
+ m_p_videoram = memregion("video")->base();
+ m_video.ptr1 = m_video.ptr2 = m_latch = 0;
+
+ m_tmpclip = rectangle(0, IE15_DISP_HORZ-1, 0, IE15_DISP_VERT-1);
+ m_tmpbmp.allocate(IE15_DISP_HORZ, IE15_DISP_VERT);
+ m_offbmp.allocate(IE15_DISP_HORZ, 1);
+ if ((machine().debug_flags & DEBUG_FLAG_ENABLED) != 0) {
+ m_offbmp.fill(0);
+ }
+}
+
+/*
+ Usable raster is 800 x 275 pixels (80 x 25 characters). 24 lines are
+ available to the user and 25th (topmost) line is the status line.
+ Status line, if enabled, displays current serial port speed, 16 setup
+ bits, and clock. There is no NVRAM, so setup bits are always 0 after
+ reset and clock starts counting at 0 XXX.
+
+ No character attributes are available, but in 'display controls' mode
+ control characters stored in memory are shown as blinking chars.
+
+ Character cell is 10 x 11; character generator provides 7 x 8 of that.
+ 3 extra horizontal pixels are always blank. Blinking cursor may be
+ displayed on 3 extra scan lines.
+
+ On each scan line, video board draws 80 characters from any location
+ in video memory; this is used by firmware to provide instant scroll
+ and cursor, which is a character with code 0x7F stored in XXX.
+
+ Video board output is controlled by
+ - control flag 0 "disable video": 0 == disable
+ - control flag 1 "cursor": 0 == if this scan line is one of extra 3,
+ enable video every 5 frames.
+ - control flag 3 "status line": 0 == current scan line is part of status line
+ - keyboard mode 'RED' ('display controls'): if character code is
+ less than 0x20 and RED is set, enable video every 5 frames; if RED is
+ unset, disable video.
+
+ XXX 'dotted look' is caused by strobe at 2x pixel clock -- use HLSL for this.
+*/
+
+UINT32 ie15_state::draw_scanline(UINT16 *p, UINT16 offset, UINT8 scanline)
+{
+ UINT8 gfx, fg, bg, ra, blink, red;
+ UINT16 x, chr;
+
+ bg = 0; fg = 1; ra = scanline % 8;
+ blink = (m_screen->frame_number() % 10) > 4;
+ red = m_io_keyboard->read() & IE_KB_RED;
+
+ for (x = offset; x < offset + 80; x++)
+ {
+ chr = m_p_videoram[x] << 3;
+ gfx = m_p_chargen[chr | ra];
+
+ if (scanline > 7 && (!m_video.cursor || blink))
+ gfx = 0;
+ else if (chr < (0x20<<3)) {
+ if (red && blink && m_video.line25)
+ gfx = m_p_chargen[chr | 0x200 | ra];
+ else
+ gfx = 0;
+ }
+
+ *p++ = BIT(gfx, 7) ? fg : bg;
+ *p++ = BIT(gfx, 6) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ *p++ = BIT(gfx, 4) ? fg : bg;
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = bg;
+ *p++ = bg;
+ *p++ = bg;
+ }
+ return 0;
+}
+
+void ie15_state::update_leds()
+{
+ UINT8 data = m_io_keyboard->read();
+ output_set_value("lat_led", m_kb_ruslat ^ 1);
+ output_set_value("nr_led", BIT(m_kb_control, IE_KB_NR_BIT) ^ 1);
+ output_set_value("pch_led", BIT(data, IE_KB_PCH_BIT) ^ 1);
+ output_set_value("dup_led", BIT(data, IE_KB_DUP_BIT) ^ 1);
+ output_set_value("lin_led", BIT(data, IE_KB_LIN_BIT) ^ 1);
+ output_set_value("red_led", BIT(data, IE_KB_RED_BIT) ^ 1);
+ output_set_value("sdv_led", BIT(m_kb_control, IE_KB_SDV_BIT) ^ 1);
+ output_set_value("prd_led", 1); // XXX
+}
+
+/*
+ VBlank is active for 3 topmost on-screen rows and 1 at the bottom; however, control flag 3 overrides VBlank,
+ allowing status line to be switched on and off.
+*/
+TIMER_DEVICE_CALLBACK_MEMBER(ie15_state::scanline_callback)
+{
+ UINT16 y = m_screen->vpos();
+
+ DBG_LOG(3,"scanline_cb",
+ ("addr %03x frame %d x %.4d y %.3d row %.2d e:c:s %d:%d:%d\n",
+ m_video.ptr2, (int)m_screen->frame_number(), m_screen->hpos(), y,
+ y%11, m_video.enable, m_video.cursor, m_video.line25));
+
+ if (y < IE15_VERT_START) return;
+ y -= IE15_VERT_START;
+ if (y >= IE15_DISP_VERT) return;
+
+ if (!m_video.enable || (y < IE15_STATUSLINE && m_video.line25)) {
+ copybitmap(m_tmpbmp, m_offbmp, 0, 0, 0, y, m_tmpclip);
+ } else {
+ draw_scanline(&m_tmpbmp.pix16(y), m_video.ptr2, y%11);
+ }
+}
+
+UINT32 ie15_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ update_leds();
+ copybitmap(bitmap, m_tmpbmp, 0, 0, IE15_HORZ_START, IE15_VERT_START, cliprect);
+ return 0;
+}
+
+
+/* F4 Character Displayer */
+static const gfx_layout ie15_charlayout =
+{
+ 7, 8, /* 7x8 pixels in 10x11 cell */
+ 256, /* 256 characters */
+ 1, /* 1 bits per pixel */
+ { 0 }, /* no bitplanes */
+ /* x offsets */
+ { 0, 1, 2, 3, 4, 5, 6 },
+ /* y offsets */
+ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
+ 8*8 /* every char takes 8 bytes */
+};
+
+static GFXDECODE_START( ie15 )
+ GFXDECODE_ENTRY("chargen", 0x0000, ie15_charlayout, 0, 1)
+GFXDECODE_END
+
+PALETTE_INIT_MEMBER( ie15_state, ie15 )
+{
+ palette.set_pen_color(0, rgb_t::black); // black
+ palette.set_pen_color(1, 0x00, 0xc0, 0x00); // green
+}
+
+static MACHINE_CONFIG_START( ie15, ie15_state )
+ /* Basic machine hardware */
+ MCFG_CPU_ADD("maincpu", IE15, XTAL_30_8MHz/10)
+ MCFG_CPU_PROGRAM_MAP(ie15_mem)
+ MCFG_CPU_IO_MAP(ie15_io)
+ MCFG_TIMER_DRIVER_ADD_PERIODIC("scantimer", ie15_state, scanline_callback, attotime::from_hz(50*28*11))
+ MCFG_TIMER_START_DELAY(attotime::from_hz(XTAL_30_8MHz/(2*IE15_HORZ_START)))
+
+ /* Video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_UPDATE_DRIVER(ie15_state, screen_update)
+ MCFG_SCREEN_RAW_PARAMS(XTAL_30_8MHz/2, IE15_TOTAL_HORZ, IE15_HORZ_START,
+ IE15_HORZ_START+IE15_DISP_HORZ, IE15_TOTAL_VERT, IE15_VERT_START,
+ IE15_VERT_START+IE15_DISP_VERT);
+
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_GFXDECODE_ADD("gfxdecode", "palette", ie15)
+ MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
+
+ MCFG_DEFAULT_LAYOUT(layout_ie15)
+
+ /* Devices */
+ MCFG_DEVICE_ADD("keyboard", IE15_KEYBOARD, 0)
+ MCFG_IE15_KEYBOARD_CB(WRITE16(ie15_state, kbd_put))
+
+ MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "null_modem")
+ MCFG_RS232_RXD_HANDLER(WRITELINE(ie15_state, serial_rx_callback))
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("beeper", BEEP, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.15)
+MACHINE_CONFIG_END
+
+
+/* ROM definition */
+ROM_START( ie15 )
+ ROM_REGION(0x1000, "maincpu", ROMREGION_ERASE00)
+ ROM_DEFAULT_BIOS("5chip")
+ ROM_SYSTEM_BIOS(0, "5chip", "5-chip firmware (newer)")
+ ROMX_LOAD("dump1.bin", 0x0000, 0x1000, CRC(14b82284) SHA1(5ac4159fbb1c3b81445605e26cd97a713ae12b5f), ROM_BIOS(1))
+ ROM_SYSTEM_BIOS(1, "6chip", "6-chip firmware (older)")
+ ROMX_LOAD("dump5.bin", 0x0000, 0x1000, CRC(01f2e065) SHA1(2b72dc0594e38a528400cd25aed0c47e0c432895), ROM_BIOS(2))
+
+ ROM_REGION(0x1000, "video", ROMREGION_ERASE00)
+
+ ROM_REGION(0x0800, "chargen", ROMREGION_ERASE00)
+ ROM_LOAD("chargen-15ie.bin", 0x0000, 0x0800, CRC(ed16bf6b) SHA1(6af9fb75f5375943d5c0ce9ed408e0fb4621b17e))
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1980, ie15, 0, 0, ie15, ie15, driver_device, 0, "USSR", "15IE-00-013", 0)