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-rw-r--r--src/mame/machine/lviv.cpp321
1 files changed, 321 insertions, 0 deletions
diff --git a/src/mame/machine/lviv.cpp b/src/mame/machine/lviv.cpp
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+++ b/src/mame/machine/lviv.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Krzysztof Strzecha
+/***************************************************************************
+
+ machine.c
+
+ Functions to emulate general aspects of PK-01 Lviv (RAM, ROM, interrupts,
+ I/O ports)
+
+ Krzysztof Strzecha
+
+***************************************************************************/
+
+#include "emu.h"
+#include "imagedev/cassette.h"
+#include "imagedev/snapquik.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/i8255.h"
+#include "includes/lviv.h"
+#include "sound/speaker.h"
+#include "machine/ram.h"
+
+#define LVIV_SNAPSHOT_SIZE 82219
+
+
+
+
+
+void lviv_state::lviv_update_memory ()
+{
+ UINT8 *ram = m_ram->pointer();
+
+ if (m_ppi_port_outputs[0][2] & 0x02)
+ {
+ membank("bank1")->set_base(ram);
+ membank("bank2")->set_base(ram + 0x4000);
+ }
+ else
+ {
+ membank("bank1")->set_base(ram + 0x8000);
+ membank("bank2")->set_base(ram + 0xc000);
+ }
+}
+
+INPUT_CHANGED_MEMBER(lviv_state::lviv_reset)
+{
+ machine().schedule_soft_reset();
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_0_porta_r)
+{
+ return 0xff;
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_0_portb_r)
+{
+ return 0xff;
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_0_portc_r)
+{
+ UINT8 data = m_ppi_port_outputs[0][2] & 0x0f;
+ if (m_cassette->input() > 0.038)
+ data |= 0x10;
+ if (m_ppi_port_outputs[0][0] & ioport("JOY")->read())
+ data |= 0x80;
+ return data;
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_0_porta_w)
+{
+ m_ppi_port_outputs[0][0] = data;
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_0_portb_w)
+{
+ m_ppi_port_outputs[0][1] = data;
+ lviv_update_palette(data&0x7f);
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_0_portc_w)/* tape in/out, video memory on/off */
+{
+ m_ppi_port_outputs[0][2] = data;
+ if (m_ppi_port_outputs[0][1]&0x80)
+ m_speaker->level_w(data & 0x01);
+ m_cassette->output((data & 0x01) ? -1.0 : 1.0);
+ lviv_update_memory();
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_1_porta_r)
+{
+ return 0xff;
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_1_portb_r)/* keyboard reading */
+{
+ return ((m_ppi_port_outputs[1][0] & 0x01) ? 0xff : ioport("KEY0")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x02) ? 0xff : ioport("KEY1")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x04) ? 0xff : ioport("KEY2")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x08) ? 0xff : ioport("KEY3")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x10) ? 0xff : ioport("KEY4")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x20) ? 0xff : ioport("KEY5")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x40) ? 0xff : ioport("KEY6")->read()) &
+ ((m_ppi_port_outputs[1][0] & 0x80) ? 0xff : ioport("KEY7")->read());
+}
+
+READ8_MEMBER(lviv_state::lviv_ppi_1_portc_r)/* keyboard reading */
+{
+ return ((m_ppi_port_outputs[1][2] & 0x01) ? 0xff : ioport("KEY8")->read()) &
+ ((m_ppi_port_outputs[1][2] & 0x02) ? 0xff : ioport("KEY9" )->read()) &
+ ((m_ppi_port_outputs[1][2] & 0x04) ? 0xff : ioport("KEY10")->read()) &
+ ((m_ppi_port_outputs[1][2] & 0x08) ? 0xff : ioport("KEY11")->read());
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_1_porta_w)/* kayboard scaning */
+{
+ m_ppi_port_outputs[1][0] = data;
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_1_portb_w)
+{
+ m_ppi_port_outputs[1][1] = data;
+}
+
+WRITE8_MEMBER(lviv_state::lviv_ppi_1_portc_w)/* kayboard scaning */
+{
+ m_ppi_port_outputs[1][2] = data;
+}
+
+
+/* I/O */
+READ8_MEMBER(lviv_state::lviv_io_r)
+{
+ if (m_startup_mem_map)
+ {
+ return 0; /* ??? */
+ }
+ else
+ {
+ switch ((offset >> 4) & 0x3)
+ {
+ case 0:
+ return machine().device<i8255_device>("ppi8255_0")->read(space, offset & 3);
+
+ case 1:
+ return machine().device<i8255_device>("ppi8255_1")->read(space, offset & 3);
+
+ case 2:
+ case 3:
+ default:
+ /* reserved for extension? */
+ return 0; /* ??? */
+ }
+ }
+}
+
+WRITE8_MEMBER(lviv_state::lviv_io_w)
+{
+ address_space &cpuspace = m_maincpu->space(AS_PROGRAM);
+ if (m_startup_mem_map)
+ {
+ UINT8 *ram = m_ram->pointer();
+
+ m_startup_mem_map = 0;
+
+ cpuspace.install_write_bank(0x0000, 0x3fff, "bank1");
+ cpuspace.install_write_bank(0x4000, 0x7fff, "bank2");
+ cpuspace.install_write_bank(0x8000, 0xbfff, "bank3");
+ cpuspace.unmap_write(0xC000, 0xffff);
+
+ membank("bank1")->set_base(ram);
+ membank("bank2")->set_base(ram + 0x4000);
+ membank("bank3")->set_base(ram + 0x8000);
+ membank("bank4")->set_base(memregion("maincpu")->base() + 0x010000);
+ }
+ else
+ {
+ switch ((offset >> 4) & 0x3)
+ {
+ case 0:
+ machine().device<i8255_device>("ppi8255_0")->write(space, offset & 3, data);
+ break;
+
+ case 1:
+ machine().device<i8255_device>("ppi8255_1")->write(space, offset & 3, data);
+ break;
+
+ case 2:
+ case 3:
+ /* reserved for extension? */
+ break;
+ }
+ }
+}
+
+
+void lviv_state::machine_reset()
+{
+ address_space &space = m_maincpu->space(AS_PROGRAM);
+ UINT8 *mem;
+
+ m_video_ram = m_ram->pointer() + 0xc000;
+
+ m_startup_mem_map = 1;
+
+ space.unmap_write(0x0000, 0x3fff);
+ space.unmap_write(0x4000, 0x7fff);
+ space.unmap_write(0x8000, 0xbfff);
+ space.unmap_write(0xC000, 0xffff);
+
+ mem = memregion("maincpu")->base();
+ membank("bank1")->set_base(mem + 0x010000);
+ membank("bank2")->set_base(mem + 0x010000);
+ membank("bank3")->set_base(mem + 0x010000);
+ membank("bank4")->set_base(mem + 0x010000);
+
+ /*machine().scheduler().timer_pulse(TIME_IN_NSEC(200), FUNC(lviv_draw_pixel));*/
+
+ /*memset(m_ram->pointer(), 0, sizeof(unsigned char)*0xffff);*/
+}
+
+
+/*******************************************************************************
+Lviv snapshot files (SAV)
+-------------------------
+
+00000 - 0000D: 'LVOV/DUMP/2.0/' (like LVT-header)
+0000E - 0000F: 'H+' (something additional)
+00010 00h
+00011 - 0C010: RAM (0000 - BFFF)
+0C011 - 10010: ROM (C000 - FFFF)
+10011 - 14010: Video RAM (4000 - 7FFF)
+14011 - 14110: Ports map (00 - FF)
+14111 - 1411C: Registers (B,C,D,E,H,L,A,F,SP,PC)
+1411D - 1412A: ??? (something additional)
+*******************************************************************************/
+
+void lviv_state::lviv_setup_snapshot (UINT8 * data)
+{
+ unsigned char lo,hi;
+
+ /* Set registers */
+ lo = data[0x14112] & 0x0ff;
+ hi = data[0x14111] & 0x0ff;
+ m_maincpu->set_state_int(I8085_BC, (hi << 8) | lo);
+ lo = data[0x14114] & 0x0ff;
+ hi = data[0x14113] & 0x0ff;
+ m_maincpu->set_state_int(I8085_DE, (hi << 8) | lo);
+ lo = data[0x14116] & 0x0ff;
+ hi = data[0x14115] & 0x0ff;
+ m_maincpu->set_state_int(I8085_HL, (hi << 8) | lo);
+ lo = data[0x14118] & 0x0ff;
+ hi = data[0x14117] & 0x0ff;
+ m_maincpu->set_state_int(I8085_AF, (hi << 8) | lo);
+ lo = data[0x14119] & 0x0ff;
+ hi = data[0x1411a] & 0x0ff;
+ m_maincpu->set_state_int(I8085_SP, (hi << 8) | lo);
+ lo = data[0x1411b] & 0x0ff;
+ hi = data[0x1411c] & 0x0ff;
+ m_maincpu->set_state_int(I8085_PC, (hi << 8) | lo);
+
+ /* Memory dump */
+ memcpy (m_ram->pointer(), data+0x0011, 0xc000);
+ memcpy (m_ram->pointer()+0xc000, data+0x10011, 0x4000);
+
+ /* Ports */
+ m_ppi_port_outputs[0][0] = data[0x14011+0xc0];
+ m_ppi_port_outputs[0][1] = data[0x14011+0xc1];
+ lviv_update_palette(m_ppi_port_outputs[0][1]&0x7f);
+ m_ppi_port_outputs[0][2] = data[0x14011+0xc2];
+ lviv_update_memory();
+}
+
+void lviv_state::dump_registers()
+{
+ logerror("PC = %04x\n", (unsigned) m_maincpu->state_int(I8085_PC));
+ logerror("SP = %04x\n", (unsigned) m_maincpu->state_int(I8085_SP));
+ logerror("AF = %04x\n", (unsigned) m_maincpu->state_int(I8085_AF));
+ logerror("BC = %04x\n", (unsigned) m_maincpu->state_int(I8085_BC));
+ logerror("DE = %04x\n", (unsigned) m_maincpu->state_int(I8085_DE));
+ logerror("HL = %04x\n", (unsigned) m_maincpu->state_int(I8085_HL));
+}
+
+int lviv_state::lviv_verify_snapshot (UINT8 * data, UINT32 size)
+{
+ const char* tag = "LVOV/DUMP/2.0/";
+
+ if( strncmp( tag, (char*)data, strlen(tag) ) )
+ {
+ logerror("Not a Lviv snapshot\n");
+ return IMAGE_VERIFY_FAIL;
+ }
+
+ if (size != LVIV_SNAPSHOT_SIZE)
+ {
+ logerror ("Incomplete snapshot file\n");
+ return IMAGE_VERIFY_FAIL;
+ }
+
+ logerror("returning ID_OK\n");
+ return IMAGE_VERIFY_PASS;
+}
+
+SNAPSHOT_LOAD_MEMBER( lviv_state, lviv )
+{
+ dynamic_buffer lviv_snapshot_data(LVIV_SNAPSHOT_SIZE);
+
+ image.fread( &lviv_snapshot_data[0], LVIV_SNAPSHOT_SIZE);
+
+ if(lviv_verify_snapshot(&lviv_snapshot_data[0], snapshot_size) == IMAGE_VERIFY_FAIL)
+ {
+ return IMAGE_INIT_FAIL;
+ }
+
+ lviv_setup_snapshot (&lviv_snapshot_data[0]);
+
+ dump_registers();
+
+ logerror("Snapshot file loaded\n");
+ return IMAGE_INIT_PASS;
+}