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Diffstat (limited to 'src/mame/drivers/m20.cpp')
-rw-r--r--src/mame/drivers/m20.cpp884
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diff --git a/src/mame/drivers/m20.cpp b/src/mame/drivers/m20.cpp
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--- a/src/mame/drivers/m20.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Christian Grossler
-/*
-
- Olivetti M20 skeleton driver, by incog (19/05/2009)
-
-Needs a proper Z8001 CPU core, check also
-
-ftp://ftp.groessler.org/pub/chris/olivetti_m20/misc/bios/rom.s
-
----
-
-APB notes:
-
-0xfc903 checks for the string TEST at 0x3f4-0x3f6, does an int 0xfe if so, unknown purpose
-
-Error codes:
-Triangle Test CPU registers and instructions
-Square Test ROM
-4 vertical lines CPU call or trap instructions failed
-Diamond Test system RAM
-E C0 8255 parallel interface IC test failed
-E C1 6845 CRT controller IC test failed
-E C2 1797 floppy disk controller chip failed
-E C3 8253 timer IC failed
-E C4 8251 keyboard interface failed
-E C5 8251 keyboard test failed
-E C6 8259 PIC IC test failed
-E K0 Keyboard did not respond
-E K1 Keyboard responds, but self test failed
-E D1 Disk drive 1 test failed
-E D0 Disk drive 0 test failed
-E I0 Non-vectored interrupt error
-E I1 Vectored interrupt error
-
-*************************************************************************************************/
-
-
-#include "emu.h"
-#include "machine/m20_8086.h"
-#include "machine/m20_kbd.h"
-
-#include "bus/rs232/rs232.h"
-#include "cpu/i86/i86.h"
-#include "cpu/z8000/z8000.h"
-#include "imagedev/floppy.h"
-#include "machine/i8251.h"
-#include "machine/i8255.h"
-#include "machine/pic8259.h"
-#include "machine/pit8253.h"
-#include "machine/ram.h"
-#include "machine/wd_fdc.h"
-#include "video/mc6845.h"
-
-#include "emupal.h"
-#include "screen.h"
-#include "softlist.h"
-
-#include "formats/m20_dsk.h"
-#include "formats/pc_dsk.h"
-
-
-class m20_state : public driver_device
-{
-public:
- m20_state(const machine_config &mconfig, device_type type, const char *tag) :
- driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_ram(*this, RAM_TAG),
- m_kbdi8251(*this, "i8251_1"),
- m_ttyi8251(*this, "i8251_2"),
- m_i8255(*this, "ppi8255"),
- m_i8259(*this, "i8259"),
- m_fd1797(*this, "fd1797"),
- m_floppy0(*this, "fd1797:0:5dd"),
- m_floppy1(*this, "fd1797:1:5dd"),
- m_apb(*this, "apb"),
- m_p_videoram(*this, "videoram"),
- m_palette(*this, "palette")
- {
- }
-
- void m20(machine_config &config);
-
-private:
- required_device<z8001_device> m_maincpu;
- required_device<ram_device> m_ram;
- required_device<i8251_device> m_kbdi8251;
- required_device<i8251_device> m_ttyi8251;
- required_device<i8255_device> m_i8255;
- required_device<pic8259_device> m_i8259;
- required_device<fd1797_device> m_fd1797;
- required_device<floppy_image_device> m_floppy0;
- required_device<floppy_image_device> m_floppy1;
- optional_device<m20_8086_device> m_apb;
-
- required_shared_ptr<uint16_t> m_p_videoram;
- required_device<palette_device> m_palette;
-
- virtual void machine_start() override;
- virtual void machine_reset() override;
-
- DECLARE_READ16_MEMBER(m20_i8259_r);
- DECLARE_WRITE16_MEMBER(m20_i8259_w);
- DECLARE_READ16_MEMBER(port21_r);
- DECLARE_WRITE16_MEMBER(port21_w);
- DECLARE_WRITE_LINE_MEMBER(tty_clock_tick_w);
- DECLARE_WRITE_LINE_MEMBER(kbd_clock_tick_w);
- DECLARE_WRITE_LINE_MEMBER(timer_tick_w);
- DECLARE_WRITE_LINE_MEMBER(int_w);
- MC6845_UPDATE_ROW(update_row);
-
- void m20_data_mem(address_map &map);
- void m20_io(address_map &map);
- void m20_program_mem(address_map &map);
-
- offs_t m_memsize;
- uint8_t m_port21;
- void install_memory();
-
- DECLARE_FLOPPY_FORMATS( floppy_formats );
- IRQ_CALLBACK_MEMBER(m20_irq_callback);
-};
-
-
-#define MAIN_CLOCK 4000000 /* 4 MHz */
-#define PIXEL_CLOCK 4.433619_MHz_XTAL
-
-
-MC6845_UPDATE_ROW( m20_state::update_row )
-{
- uint32_t *p = &bitmap.pix32(y);
- const rgb_t *palette = m_palette->palette()->entry_list_raw();
- int i, j;
-
- for ( i = 0; i < x_count; i++ )
- {
- uint16_t offset = ((ma | (ra << 1)) << 4) + i;
- uint16_t data = m_p_videoram[ offset ];
-
- for ( j = 15; j >= 0; j-- )
- {
- *p = palette[( data & 1 << j ) ? 1 : 0];
- p++;
- }
- }
-}
-
-/*
-port21 = 0x21 !TTL latch
-! (see hw1 document, fig 2-33, pg 2-47)
-! Output Input
-! ====== =====
-! B0 0 selects floppy 0
-! 1 deselects floppy 0
-! B1 0 selects floppy 1
-! 1 deselects floppy 1
-! B2 Motor On (Not Used)
-! B3 0 selects double density 0 => Skip basic tests
-! 1 selects single density 1 => Perform basic tests
-! Latched copy when B7 is written to Port21
-! B4 Uncommitted output 0 => 128K card(s) present
-! 1 => 32K card(s) present
-! Cannot mix types!
-! B5 Uncommitted output 0 => 8-colour card present
-! 1 => 4-colour card present
-! B6 Uncommitted output 0 => RAM
-! 1 => ROM (???)
-! B7 See B3 input 0 => colour card present
-*/
-
-READ16_MEMBER(m20_state::port21_r)
-{
- //printf("port21 read: offset 0x%x\n", offset);
- return m_port21;
-}
-
-WRITE16_MEMBER(m20_state::port21_w)
-{
- //printf("port21 write: offset 0x%x, data 0x%x\n", offset, data);
- m_port21 = (m_port21 & 0xf8) | (data & 0x7);
-
- // floppy drive select
- if (data & 1) {
- m_floppy0->mon_w(0);
- m_fd1797->set_floppy(m_floppy0);
- }
- else
- m_floppy0->mon_w(1);
-
- if (data & 2) {
- m_floppy1->mon_w(0);
- m_fd1797->set_floppy(m_floppy1);
- }
- else
- m_floppy1->mon_w(1);
-
- if(!(data & 3))
- m_fd1797->set_floppy(nullptr);
-
- // density select 1 - sd, 0 - dd
- m_fd1797->dden_w(data & 8);
-}
-
-READ16_MEMBER(m20_state::m20_i8259_r)
-{
- return m_i8259->read(offset)<<1;
-}
-
-WRITE16_MEMBER(m20_state::m20_i8259_w)
-{
- m_i8259->write(offset, (data>>1));
-}
-
-WRITE_LINE_MEMBER( m20_state::tty_clock_tick_w )
-{
- m_ttyi8251->write_txc(state);
- m_ttyi8251->write_rxc(state);
-}
-
-WRITE_LINE_MEMBER( m20_state::kbd_clock_tick_w )
-{
- m_kbdi8251->write_txc(state);
- m_kbdi8251->write_rxc(state);
-}
-
-WRITE_LINE_MEMBER( m20_state::timer_tick_w )
-{
- /* Using HOLD_LINE is not completely correct:
- * The output of the 8253 is connected to a 74LS74 flop chip.
- * The output of the flop chip is connected to NVI CPU input.
- * The flop is reset by a 1:8 decoder which compares CPU ST0-ST3
- * outputs to detect an interrupt acknowledge transaction.
- * 8253 is programmed in square wave mode, not rate
- * generator mode.
- */
- if(m_apb)
- m_apb->nvi_w(state);
- m_maincpu->set_input_line(z8001_device::NVI_LINE, state ? HOLD_LINE /*ASSERT_LINE*/ : CLEAR_LINE);
-}
-
-
-/* Memory map description (by courtesy of Dwight Elvey)
-
- DRAM0 = motherboard (128K)
- DRAM1 = first slot from keyboard end
- DRAM2 = second slot from keyboard end
- DRAM3 = third slot from keyboard end
- SRAM0 = memory window for expansion slot
- ROM0 = ROM
-
-Expansion cards are either 32K or 128K. They cannot be mixed, all installed
-cards need to be the same type.
-
-B/W, 32K cards, 3 cards => 224K of memory:
-<0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000
-<0>4000 D DRAM1 4000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000
-<0>8000 D DRAM2 0000 I DRAM0 C000 <8>8000 D DRAM2 4000 I DRAM1 4000
-<0>C000 D DRAM2 4000 I DRAM0 10000 <8>C000 D DRAM3 0000 I DRAM2 0000
-<1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000
-<1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000
-<1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM2 4000 I DRAM2 4000
-<1>C000 D DRAM1 0000 I None <9>C000 D DRAM3 0000 I DRAM3 0000
-<2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000
-<2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000
-<2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 4000 I DRAM1 4000
-<2>C000 D DRAM1 0000 I DRAM1 0000 <A>C000 D DRAM2 0000 I DRAM2 0000
-<3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM3 4000 I DRAM3 4000
-<3>4000 D None I None <B>4000 D None I None
-<3>8000 D None I None <B>8000 D None I None
-<3>C000 D None I None <B>C000 D None I None
-<4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM3 4000 I None
-<4>4000 D DRAM3 0000 I ROM0 10000 <C>4000 D None I None
-<4>8000 D DRAM3 4000 I ROM0 14000 <C>8000 D None I None
-<4>C000 D None I ROM0 18000 <C>C000 D None I None
-<5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D None I None
-<5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D None I None
-<5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D None I None
-<5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D None I None
-<6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D None I None
-<6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D None I None
-<6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D None I None
-<6>C000 D None I None <E>C000 D None I None
-<7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D None I None
-<7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D None I None
-<7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D None I None
-<7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D None I None
-
-B/W, 128K cards, 3 cards => 512K of memory:
-<0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000
-<0>4000 D DRAM1 4000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000
-<0>8000 D DRAM2 0000 I DRAM0 C000 <8>8000 D DRAM1 C000 I DRAM1 4000
-<0>C000 D DRAM2 4000 I DRAM0 10000 <8>C000 D DRAM1 10000 I DRAM1 8000
-<1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000
-<1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000
-<1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM1 C000 I DRAM1 C000
-<1>C000 D DRAM1 0000 I None <9>C000 D DRAM1 10000 I DRAM1 10000
-<2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000
-<2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000
-<2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 4000 I DRAM1 4000
-<2>C000 D DRAM1 0000 I DRAM1 0000 <A>C000 D DRAM1 8000 I DRAM1 8000
-<3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM1 14000 I DRAM1 14000
-<3>4000 D None I None <B>4000 D DRAM1 18000 I DRAM1 18000
-<3>8000 D None I None <B>8000 D DRAM1 1C000 I DRAM1 1C000
-<3>C000 D None I None <B>C000 D DRAM2 0000 I DRAM2 0000
-<4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM2 4000 I DRAM2 4000
-<4>4000 D DRAM3 0000 I None <C>4000 D DRAM2 8000 I DRAM2 8000
-<4>8000 D DRAM3 4000 I None <C>8000 D DRAM2 C000 I DRAM2 C000
-<4>C000 D None I None <C>C000 D DRAM2 10000 I DRAM2 10000
-<5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D DRAM2 14000 I DRAM2 14000
-<5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D DRAM2 18000 I DRAM2 18000
-<5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D DRAM2 1C000 I DRAM2 1C000
-<5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D DRAM3 0000 I DRAM3 0000
-<6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D DRAM3 4000 I DRAM3 4000
-<6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D DRAM3 8000 I DRAM3 8000
-<6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D DRAM3 C000 I DRAM3 C000
-<6>C000 D None I None <E>C000 D DRAM3 10000 I DRAM3 10000
-<7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D DRAM3 14000 I DRAM3 14000
-<7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D DRAM3 18000 I DRAM3 18000
-<7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D DRAM3 1C000 I DRAM3 1C000
-<7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D DRAM3 0000 I DRAM3 0000
-*/
-
-
-void m20_state::m20_program_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x30000, 0x33fff).ram().share("videoram");
- map(0x40000, 0x41fff).rom().region("maincpu", 0x00000);
-}
-
-void m20_state::m20_data_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x30000, 0x33fff).ram().share("videoram");
- map(0x40000, 0x41fff).rom().region("maincpu", 0x00000);
-}
-
-
-void m20_state::install_memory()
-{
- m_memsize = m_ram->size();
- uint8_t *memptr = m_ram->pointer();
- address_space& pspace = m_maincpu->space(AS_PROGRAM);
- address_space& dspace = m_maincpu->space(AS_DATA);
-
- /* install mainboard memory (aka DRAM0) */
-
- /* <0>0000 */
- pspace.install_readwrite_bank(0x0000, 0x3fff, 0, "dram0_4000");
- dspace.install_readwrite_bank(0x0000, 0x3fff, 0, "dram0_4000");
- /* <0>4000 */
- pspace.install_readwrite_bank(0x4000, 0x7fff, 0, "dram0_8000");
- /* <0>8000 */
- pspace.install_readwrite_bank(0x8000, 0xbfff, 0, "dram0_c000");
- /* <0>C000 */
- pspace.install_readwrite_bank(0xc000, 0xcfff, 0, "dram0_10000");
- /* <1>0000 */
- pspace.install_readwrite_bank(0x10000, 0x13fff, 0, "dram0_8000");
- dspace.install_readwrite_bank(0x10000, 0x13fff, 0, "dram0_14000");
- /* <1>4000 */
- pspace.install_readwrite_bank(0x14000, 0x17fff, 0, "dram0_c000");
- dspace.install_readwrite_bank(0x14000, 0x17fff, 0, "dram0_18000");
- /* <1>8000 */
- pspace.install_readwrite_bank(0x18000, 0x1bfff, 0, "dram0_10000");
- dspace.install_readwrite_bank(0x18000, 0x1bfff, 0, "dram0_1c000");
- /* <1>c000 empty*/
- /* <2>0000 */
- pspace.install_readwrite_bank(0x20000, 0x23fff, 0, "dram0_14000");
- dspace.install_readwrite_bank(0x20000, 0x23fff, 0, "dram0_14000");
- /* <2>4000 */
- pspace.install_readwrite_bank(0x24000, 0x27fff, 0, "dram0_18000");
- dspace.install_readwrite_bank(0x24000, 0x27fff, 0, "dram0_18000");
- /* <2>8000 */
- pspace.install_readwrite_bank(0x28000, 0x2bfff, 0, "dram0_1c000");
- dspace.install_readwrite_bank(0x28000, 0x2bfff, 0, "dram0_1c000");
- /* <2>c000 empty*/
- /* <3>0000 (video buffer)
- pspace.install_readwrite_bank(0x30000, 0x33fff, 0, "dram0_0000");
- dspace.install_readwrite_bank(0x30000, 0x33fff, 0, "dram0_0000");
- */
-
- /* <5>0000 */
- dspace.install_readwrite_bank(0x50000, 0x53fff, 0, "dram0_8000");
- /* <5>4000 */
- dspace.install_readwrite_bank(0x54000, 0x57fff, 0, "dram0_c000");
- /* <5>8000 */
- dspace.install_readwrite_bank(0x58000, 0x5bfff, 0, "dram0_10000");
- /* <5>c000 expansion bus */
- /* <6>0000 */
- pspace.install_readwrite_bank(0x60000, 0x63fff, 0, "dram0_8000");
- dspace.install_readwrite_bank(0x60000, 0x63fff, 0, "dram0_8000");
- /* <6>4000 */
- pspace.install_readwrite_bank(0x64000, 0x67fff, 0, "dram0_c000");
- dspace.install_readwrite_bank(0x64000, 0x67fff, 0, "dram0_c000");
- /* <6>8000 */
- pspace.install_readwrite_bank(0x68000, 0x6bfff, 0, "dram0_10000");
- dspace.install_readwrite_bank(0x68000, 0x6bfff, 0, "dram0_10000");
- /* <6>c000 empty*/
- /* segment <7> expansion ROM? */
- /* <8>0000 */
- pspace.install_readwrite_bank(0x80000, 0x83fff, 0, "dram0_8000");
- dspace.install_readwrite_bank(0x80000, 0x83fff, 0, "dram0_18000");
- /* <8>4000 */
- pspace.install_readwrite_bank(0x84000, 0x87fff, 0, "dram0_c000");
- dspace.install_readwrite_bank(0x84000, 0x87fff, 0, "dram0_1c000");
- /* <9>0000 */
- pspace.install_readwrite_bank(0x90000, 0x93fff, 0, "dram0_18000");
- dspace.install_readwrite_bank(0x90000, 0x93fff, 0, "dram0_18000");
- /* <9>4000 */
- pspace.install_readwrite_bank(0x94000, 0x97fff, 0, "dram0_1c000");
- dspace.install_readwrite_bank(0x94000, 0x97fff, 0, "dram0_1c000");
- /* <A>0000 */
- pspace.install_readwrite_bank(0xa0000, 0xa3fff, 0, "dram0_8000");
- dspace.install_readwrite_bank(0xa0000, 0xa3fff, 0, "dram0_8000");
- /* <A>4000 */
- pspace.install_readwrite_bank(0xa4000, 0xa7fff, 0, "dram0_c000");
- dspace.install_readwrite_bank(0xa4000, 0xa7fff, 0, "dram0_c000");
-
- //membank("dram0_0000")->set_base(memptr);
- membank("dram0_4000")->set_base(memptr + 0x4000);
- membank("dram0_8000")->set_base(memptr + 0x8000);
- membank("dram0_c000")->set_base(memptr + 0xc000);
- membank("dram0_10000")->set_base(memptr + 0x10000);
- membank("dram0_14000")->set_base(memptr + 0x14000);
- membank("dram0_18000")->set_base(memptr + 0x18000);
- membank("dram0_1c000")->set_base(memptr + 0x1c000);
-
- if (m_memsize > 128 * 1024) {
- /* install memory expansions (DRAM1..DRAM3) */
-
- if (m_memsize < 256 * 1024) {
- /* 32K expansion cards */
-
- /* DRAM1, 32K */
-
- /* prog
- map( 0x2c000, 0x2ffff ).ram().share("dram1_0000");
- map( 0x88000, 0x8bfff ).ram().share("dram1_4000");
- map( 0xa8000, 0xabfff ).ram().share("dram1_4000");
- */
- pspace.install_readwrite_bank(0x2c000, 0x2ffff, 0, "dram1_0000");
- pspace.install_readwrite_bank(0x88000, 0x8bfff, 0, "dram1_4000");
- pspace.install_readwrite_bank(0xa8000, 0xabfff, 0, "dram1_4000");
-
- /*
- data
- map( 0x04000, 0x07fff ).ram().share("dram1_4000");
- map( 0x1c000, 0x1ffff ).ram().share("dram1_0000");
- map( 0x2c000, 0x2ffff ).ram().share("dram1_0000");
- map( 0xa8000, 0xabfff ).ram().share("dram1_4000");
- */
- dspace.install_readwrite_bank(0x4000, 0x7fff, 0, "dram1_4000");
- dspace.install_readwrite_bank(0x1c000, 0x1ffff, 0, "dram1_0000");
- dspace.install_readwrite_bank(0x2c000, 0x2ffff, 0, "dram1_0000");
- dspace.install_readwrite_bank(0xa8000, 0xabfff, 0, "dram1_4000");
-
- membank("dram1_0000")->set_base(memptr + 0x20000);
- membank("dram1_4000")->set_base(memptr + 0x24000);
-
- if (m_memsize > 128 * 1024 + 32768) {
- /* DRAM2, 32K */
-
- /* prog
- map( 0x8c000, 0x8ffff ).ram().share("dram2_0000");
- map( 0x98000, 0x9bfff ).ram().share("dram2_4000");
- map( 0xac000, 0xaffff ).ram().share("dram2_0000");
- */
- pspace.install_readwrite_bank(0x8c000, 0x8ffff, 0, "dram2_0000");
- pspace.install_readwrite_bank(0x98000, 0x9bfff, 0, "dram2_4000");
- pspace.install_readwrite_bank(0xac000, 0xaffff, 0, "dram2_0000");
-
- /* data
- map( 0x08000, 0x0bfff ).ram().share("dram2_0000");
- map( 0x0c000, 0x0ffff ).ram().share("dram2_4000");
- map( 0x88000, 0x8bfff ).ram().share("dram2_4000");
- map( 0x98000, 0x9bfff ).ram().share("dram2_4000");
- map( 0xac000, 0xaffff ).ram().share("dram2_0000");
- */
- dspace.install_readwrite_bank(0x8000, 0xbfff, 0, "dram2_0000");
- dspace.install_readwrite_bank(0xc000, 0xffff, 0, "dram2_4000");
- dspace.install_readwrite_bank(0x88000, 0x8bfff, 0, "dram2_4000");
- dspace.install_readwrite_bank(0x98000, 0x9bfff, 0, "dram2_4000");
- dspace.install_readwrite_bank(0xac000, 0xaffff, 0, "dram2_0000");
-
- membank("dram2_0000")->set_base(memptr + 0x28000);
- membank("dram2_4000")->set_base(memptr + 0x2c000);
- }
- if (m_memsize > 128 * 1024 + 2 * 32768) {
- /* DRAM3, 32K */
-
- /* prog
- map( 0x9c000, 0x9ffff ).ram().share("dram3_0000");
- map( 0xb0000, 0xb3fff ).ram().share("dram3_4000");
- */
- pspace.install_readwrite_bank(0x9c000, 0x9ffff, 0, "dram3_0000");
- pspace.install_readwrite_bank(0xb0000, 0xb3fff, 0, "dram3_4000");
-
- /* data
- map( 0x44000, 0x47fff ).ram().share("dram3_0000");
- map( 0x48000, 0x4bfff ).ram().share("dram3_4000");
- map( 0x8c000, 0x8ffff ).ram().share("dram3_0000");
- map( 0x9c000, 0x9ffff ).ram().share("dram3_0000");
- map( 0xb0000, 0xb3fff ).ram().share("dram3_4000");
- map( 0xc0000, 0xc3fff ).ram().share("dram3_4000");
- */
- dspace.install_readwrite_bank(0x44000, 0x47fff, 0, "dram3_0000");
- dspace.install_readwrite_bank(0x48000, 0x4bfff, 0, "dram3_4000");
- dspace.install_readwrite_bank(0x8c000, 0x8ffff, 0, "dram3_0000");
- dspace.install_readwrite_bank(0x9c000, 0x9ffff, 0, "dram3_0000");
- dspace.install_readwrite_bank(0xb0000, 0xb3fff, 0, "dram3_4000");
- dspace.install_readwrite_bank(0xc0000, 0xc3fff, 0, "dram3_4000");
-
- membank("dram3_0000")->set_base(memptr + 0x30000);
- membank("dram3_4000")->set_base(memptr + 0x34000);
- }
- }
- else {
- /* 128K expansion cards */
-
- /* DRAM1, 128K */
-
- /* prog
- map( 0x2c000, 0x2ffff ).ram().share("dram1_0000");
- map( 0x88000, 0x8bfff ).ram().share("dram1_4000");
- map( 0x8c000, 0x8ffff ).ram().share("dram1_8000");
- map( 0x98000, 0x9bfff ).ram().share("dram1_c000");
- map( 0x9c000, 0x9ffff ).ram().share("dram1_10000");
- map( 0xa8000, 0xabfff ).ram().share("dram1_4000");
- map( 0xac000, 0xaffff ).ram().share("dram1_8000");
- map( 0xb0000, 0xb3fff ).ram().share("dram1_14000");
- map( 0xb4000, 0xb7fff ).ram().share("dram1_18000");
- map( 0xb8000, 0xbbfff ).ram().share("dram1_1c000");
- */
- pspace.install_readwrite_bank(0x2c000, 0x2ffff, 0, "dram1_0000");
- pspace.install_readwrite_bank(0x88000, 0x8bfff, 0, "dram1_4000");
- pspace.install_readwrite_bank(0x8c000, 0x8ffff, 0, "dram1_8000");
- pspace.install_readwrite_bank(0x98000, 0x9bfff, 0, "dram1_c000");
- pspace.install_readwrite_bank(0x9c000, 0x9ffff, 0, "dram1_10000");
- pspace.install_readwrite_bank(0xa8000, 0xabfff, 0, "dram1_4000");
- pspace.install_readwrite_bank(0xac000, 0xaffff, 0, "dram1_8000");
- pspace.install_readwrite_bank(0xb0000, 0xb3fff, 0, "dram1_14000");
- pspace.install_readwrite_bank(0xb4000, 0xb7fff, 0, "dram1_18000");
- pspace.install_readwrite_bank(0xb8000, 0xbbfff, 0, "dram1_1c000");
-
- /* data
- map( 0x04000, 0x07fff ).ram().share("dram1_4000");
- map( 0x1c000, 0x1ffff ).ram().share("dram1_0000");
- map( 0x2c000, 0x2ffff ).ram().share("dram1_0000");
- map( 0x88000, 0x8bfff ).ram().share("dram1_c000");
- map( 0x8c000, 0x8ffff ).ram().share("dram1_10000");
- map( 0x98000, 0x9bfff ).ram().share("dram1_c000");
- map( 0x9c000, 0x9ffff ).ram().share("dram1_10000");
- map( 0xa8000, 0xabfff ).ram().share("dram1_4000");
- map( 0xac000, 0xaffff ).ram().share("dram1_8000");
- map( 0xb0000, 0xb3fff ).ram().share("dram1_14000");
- map( 0xb4000, 0xb7fff ).ram().share("dram1_18000");
- map( 0xb8000, 0xbbfff ).ram().share("dram1_1c000");
- */
- dspace.install_readwrite_bank(0x4000, 0x7fff, 0, "dram1_4000");
- dspace.install_readwrite_bank(0x1c000, 0x1ffff, 0, "dram1_0000");
- dspace.install_readwrite_bank(0x2c000, 0x2ffff, 0, "dram1_0000");
- dspace.install_readwrite_bank(0x88000, 0x8bfff, 0, "dram1_c000");
- dspace.install_readwrite_bank(0x8c000, 0x8ffff, 0, "dram1_10000");
- dspace.install_readwrite_bank(0x98000, 0x9bfff, 0, "dram1_c000");
- dspace.install_readwrite_bank(0x9c000, 0x9ffff, 0, "dram1_10000");
- dspace.install_readwrite_bank(0xa8000, 0xabfff, 0, "dram1_4000");
- dspace.install_readwrite_bank(0xac000, 0xaffff, 0, "dram1_8000");
- dspace.install_readwrite_bank(0xb0000, 0xb3fff, 0, "dram1_14000");
- dspace.install_readwrite_bank(0xb4000, 0xb7fff, 0, "dram1_18000");
- dspace.install_readwrite_bank(0xb8000, 0xbbfff, 0, "dram1_1c000");
-
- membank("dram1_0000")->set_base(memptr + 0x20000);
- membank("dram1_4000")->set_base(memptr + 0x24000);
- membank("dram1_8000")->set_base(memptr + 0x28000);
- membank("dram1_c000")->set_base(memptr + 0x2c000);
- membank("dram1_10000")->set_base(memptr + 0x30000);
- membank("dram1_14000")->set_base(memptr + 0x34000);
- membank("dram1_18000")->set_base(memptr + 0x38000);
- membank("dram1_1c000")->set_base(memptr + 0x3c000);
-
- if (m_memsize > 256 * 1024) {
- /* DRAM2, 128K */
-
- /* prog
- map( 0xbc000, 0xbffff ).ram().share("dram2_0000");
-
- map( 0xc0000, 0xc3fff ).ram().share("dram2_4000");
- map( 0xc4000, 0xc7fff ).ram().share("dram2_8000");
- map( 0xc8000, 0xcbfff ).ram().share("dram2_c000");
- map( 0xcc000, 0xcffff ).ram().share("dram2_10000");
-
- map( 0xd0000, 0xd3fff ).ram().share("dram2_14000");
- map( 0xd4000, 0xd7fff ).ram().share("dram2_18000");
- map( 0xd8000, 0xdbfff ).ram().share("dram2_1c000");
- */
- pspace.install_readwrite_bank(0xbc000, 0xbffff, 0, "dram2_0000");
- pspace.install_readwrite_bank(0xc0000, 0xc3fff, 0, "dram2_4000");
- pspace.install_readwrite_bank(0xc4000, 0xc7fff, 0, "dram2_8000");
- pspace.install_readwrite_bank(0xc8000, 0xcbfff, 0, "dram2_c000");
- pspace.install_readwrite_bank(0xcc000, 0xcffff, 0, "dram2_10000");
- pspace.install_readwrite_bank(0xd0000, 0xd3fff, 0, "dram2_14000");
- pspace.install_readwrite_bank(0xd4000, 0xd7fff, 0, "dram2_18000");
- pspace.install_readwrite_bank(0xd8000, 0xdbfff, 0, "dram2_1c000");
-
- /* data
- map( 0x08000, 0x0bfff ).ram().share("dram2_0000");
- map( 0x0c000, 0x0ffff ).ram().share("dram2_4000");
-
- map( 0xbc000, 0xbffff ).ram().share("dram2_0000");
-
- map( 0xc0000, 0xc3fff ).ram().share("dram2_4000");
- map( 0xc4000, 0xc7fff ).ram().share("dram2_8000");
- map( 0xc8000, 0xcbfff ).ram().share("dram2_c000");
- map( 0xcc000, 0xcffff ).ram().share("dram2_10000");
-
- map( 0xd0000, 0xd3fff ).ram().share("dram2_14000");
- map( 0xd4000, 0xd7fff ).ram().share("dram2_18000");
- map( 0xd8000, 0xdbfff ).ram().share("dram2_1c000");
- */
- dspace.install_readwrite_bank(0x8000, 0xbfff, 0, "dram2_0000");
- dspace.install_readwrite_bank(0xc000, 0xffff, 0, "dram2_4000");
- dspace.install_readwrite_bank(0xbc000, 0xbffff, 0, "dram2_0000");
- dspace.install_readwrite_bank(0xc0000, 0xc3fff, 0, "dram2_4000");
- dspace.install_readwrite_bank(0xc4000, 0xc7fff, 0, "dram2_8000");
- dspace.install_readwrite_bank(0xc8000, 0xcbfff, 0, "dram2_c000");
- dspace.install_readwrite_bank(0xcc000, 0xcffff, 0, "dram2_10000");
- dspace.install_readwrite_bank(0xd0000, 0xd3fff, 0, "dram2_14000");
- dspace.install_readwrite_bank(0xd4000, 0xd7fff, 0, "dram2_18000");
- dspace.install_readwrite_bank(0xd8000, 0xdbfff, 0, "dram2_1c000");
-
- membank("dram2_0000")->set_base(memptr + 0x40000);
- membank("dram2_4000")->set_base(memptr + 0x44000);
- membank("dram2_8000")->set_base(memptr + 0x48000);
- membank("dram2_c000")->set_base(memptr + 0x4c000);
- membank("dram2_10000")->set_base(memptr + 0x50000);
- membank("dram2_14000")->set_base(memptr + 0x54000);
- membank("dram2_18000")->set_base(memptr + 0x58000);
- membank("dram2_1c000")->set_base(memptr + 0x5c000);
- }
- if (m_memsize > 384 * 1024) {
- /* DRAM3, 128K */
-
- /* prog
- map( 0xdc000, 0xdffff ).ram().share("dram3_0000");
-
- map( 0xe0000, 0xe3fff ).ram().share("dram3_4000");
- map( 0xe4000, 0xe7fff ).ram().share("dram3_8000");
- map( 0xe8000, 0xebfff ).ram().share("dram3_c000");
- map( 0xec000, 0xeffff ).ram().share("dram3_10000");
-
- map( 0xf0000, 0xf3fff ).ram().share("dram3_14000");
- map( 0xf4000, 0xf7fff ).ram().share("dram3_18000");
- map( 0xf8000, 0xfbfff ).ram().share("dram3_1c000");
- map( 0xfc000, 0xfffff ).ram().share("dram3_0000");
- */
- pspace.install_readwrite_bank(0xdc000, 0xdffff, 0, "dram3_0000");
- pspace.install_readwrite_bank(0xe0000, 0xe3fff, 0, "dram3_4000");
- pspace.install_readwrite_bank(0xe4000, 0xe7fff, 0, "dram3_8000");
- pspace.install_readwrite_bank(0xe8000, 0xebfff, 0, "dram3_c000");
- pspace.install_readwrite_bank(0xec000, 0xeffff, 0, "dram3_10000");
- pspace.install_readwrite_bank(0xf0000, 0xf3fff, 0, "dram3_14000");
- pspace.install_readwrite_bank(0xf4000, 0xf7fff, 0, "dram3_18000");
- pspace.install_readwrite_bank(0xf8000, 0xfbfff, 0, "dram3_1c000");
- pspace.install_readwrite_bank(0xfc000, 0xfffff, 0, "dram3_0000");
-
- /* data
- map( 0x44000, 0x47fff ).ram().share("dram3_0000");
- map( 0x48000, 0x4bfff ).ram().share("dram3_4000");
- map( 0xdc000, 0xdffff ).ram().share("dram3_0000");
-
- map( 0xe0000, 0xe3fff ).ram().share("dram3_4000");
- map( 0xe4000, 0xe7fff ).ram().share("dram3_8000");
- map( 0xe8000, 0xebfff ).ram().share("dram3_c000");
- map( 0xec000, 0xeffff ).ram().share("dram3_10000");
-
- map( 0xf0000, 0xf3fff ).ram().share("dram3_14000");
- map( 0xf4000, 0xf7fff ).ram().share("dram3_18000");
- map( 0xf8000, 0xfbfff ).ram().share("dram3_1c000");
- map( 0xfc000, 0xfffff ).ram().share("dram3_0000");
- */
- dspace.install_readwrite_bank(0x44000, 0x47fff, 0, "dram3_0000");
- dspace.install_readwrite_bank(0x48000, 0x4bfff, 0, "dram3_4000");
- dspace.install_readwrite_bank(0xdc000, 0xdffff, 0, "dram3_0000");
- dspace.install_readwrite_bank(0xe0000, 0xe3fff, 0, "dram3_4000");
- dspace.install_readwrite_bank(0xe4000, 0xe7fff, 0, "dram3_8000");
- dspace.install_readwrite_bank(0xe8000, 0xebfff, 0, "dram3_c000");
- dspace.install_readwrite_bank(0xec000, 0xeffff, 0, "dram3_10000");
- dspace.install_readwrite_bank(0xf0000, 0xf3fff, 0, "dram3_14000");
- dspace.install_readwrite_bank(0xf4000, 0xf7fff, 0, "dram3_18000");
- dspace.install_readwrite_bank(0xf8000, 0xfbfff, 0, "dram3_1c000");
- dspace.install_readwrite_bank(0xfc000, 0xfffff, 0, "dram3_0000");
-
- membank("dram3_0000")->set_base(memptr + 0x60000);
- membank("dram3_4000")->set_base(memptr + 0x64000);
- membank("dram3_8000")->set_base(memptr + 0x68000);
- membank("dram3_c000")->set_base(memptr + 0x6c000);
- membank("dram3_10000")->set_base(memptr + 0x70000);
- membank("dram3_14000")->set_base(memptr + 0x74000);
- membank("dram3_18000")->set_base(memptr + 0x78000);
- membank("dram3_1c000")->set_base(memptr + 0x7c000);
- }
- }
- }
-}
-
-void m20_state::m20_io(address_map &map)
-{
- map.unmap_value_high();
-
- map(0x00, 0x07).rw(m_fd1797, FUNC(fd1797_device::read), FUNC(fd1797_device::write)).umask16(0x00ff);
-
- map(0x20, 0x21).rw(FUNC(m20_state::port21_r), FUNC(m20_state::port21_w));
-
- map(0x61, 0x61).w("crtc", FUNC(mc6845_device::address_w));
- map(0x62, 0x62).w("crtc", FUNC(mc6845_device::address_w)); // FIXME
- map(0x63, 0x63).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
- map(0x64, 0x64).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
-
- map(0x80, 0x87).rw(m_i8255, FUNC(i8255_device::read), FUNC(i8255_device::write)).umask16(0x00ff);
-
- map(0xa1, 0xa1).rw(m_kbdi8251, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
- map(0xa3, 0xa3).rw(m_kbdi8251, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
-
- map(0xc1, 0xc1).rw(m_ttyi8251, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
- map(0xc3, 0xc3).rw(m_ttyi8251, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
-
- map(0x120, 0x127).rw("pit8253", FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff);
-
- map(0x140, 0x143).rw(FUNC(m20_state::m20_i8259_r), FUNC(m20_state::m20_i8259_w));
-
- map(0x3ffa, 0x3ffd).w(m_apb, FUNC(m20_8086_device::handshake_w));
-}
-
-IRQ_CALLBACK_MEMBER(m20_state::m20_irq_callback)
-{
- if (! irqline)
- return 0xff; // NVI, value ignored
- else
- return m_i8259->acknowledge();
-}
-
-WRITE_LINE_MEMBER(m20_state::int_w)
-{
- if(m_apb && !m_apb->halted())
- m_apb->vi_w(state);
- m_maincpu->set_input_line(z8001_device::VI_LINE, state ? ASSERT_LINE : CLEAR_LINE);
-}
-
-void m20_state::machine_start()
-{
- install_memory();
-}
-
-void m20_state::machine_reset()
-{
- uint8_t *ROM = memregion("maincpu")->base();
- uint8_t *RAM = (uint8_t *)(m_ram->pointer() + 0x4000);
-
- if (m_memsize >= 256 * 1024)
- m_port21 = 0xdf;
- else
- m_port21 = 0xff;
-
- if(system_bios() > 0) // bits have different meanings?
- m_port21 &= ~8;
-
- m_fd1797->reset();
-
- memcpy(RAM, ROM, 8); // we need only the reset vector
- m_maincpu->reset(); // FIXME: rewrite Z8000 core to not read the vector at this time
- m_kbdi8251->write_cts(0);
- if (m_apb)
- m_apb->halt();
-}
-
-
-static void m20_floppies(device_slot_interface &device)
-{
- device.option_add("5dd", FLOPPY_525_DD);
-}
-
-FLOPPY_FORMATS_MEMBER( m20_state::floppy_formats )
- FLOPPY_M20_FORMAT,
- FLOPPY_PC_FORMAT
-FLOPPY_FORMATS_END
-
-static void keyboard(device_slot_interface &device)
-{
- device.option_add("m20", M20_KEYBOARD);
-}
-
-void m20_state::m20(machine_config &config)
-{
- /* basic machine hardware */
- Z8001(config, m_maincpu, MAIN_CLOCK);
- m_maincpu->set_addrmap(AS_PROGRAM, &m20_state::m20_program_mem);
- m_maincpu->set_addrmap(AS_DATA, &m20_state::m20_data_mem);
- m_maincpu->set_addrmap(AS_IO, &m20_state::m20_io);
- m_maincpu->set_irq_acknowledge_callback(FUNC(m20_state::m20_irq_callback));
-
- RAM(config, RAM_TAG).set_default_size("160K").set_default_value(0).set_extra_options("128K,192K,224K,256K,384K,512K");
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(60);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
- screen.set_size(512, 256);
- screen.set_visarea(0, 512-1, 0, 256-1);
- screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
- PALETTE(config, m_palette, palette_device::MONOCHROME);
-
- /* Devices */
- FD1797(config, m_fd1797, 1000000);
- m_fd1797->intrq_wr_callback().set(m_i8259, FUNC(pic8259_device::ir0_w));
- FLOPPY_CONNECTOR(config, "fd1797:0", m20_floppies, "5dd", m20_state::floppy_formats);
- FLOPPY_CONNECTOR(config, "fd1797:1", m20_floppies, "5dd", m20_state::floppy_formats);
-
- mc6845_device &crtc(MC6845(config, "crtc", PIXEL_CLOCK/8)); /* hand tuned to get ~50 fps */
- crtc.set_screen("screen");
- crtc.set_show_border_area(false);
- crtc.set_char_width(16);
- crtc.set_update_row_callback(FUNC(m20_state::update_row));
-
- I8255A(config, m_i8255, 0);
-
- I8251(config, m_kbdi8251, 0);
- m_kbdi8251->txd_handler().set("kbd", FUNC(rs232_port_device::write_txd));
- m_kbdi8251->rxrdy_handler().set(m_i8259, FUNC(pic8259_device::ir4_w));
-
- I8251(config, m_ttyi8251, 0);
- m_ttyi8251->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
- m_ttyi8251->rxrdy_handler().set(m_i8259, FUNC(pic8259_device::ir3_w));
- m_ttyi8251->txrdy_handler().set(m_i8259, FUNC(pic8259_device::ir5_w));
-
- pit8253_device &pit8253(PIT8253(config, "pit8253", 0));
- pit8253.set_clk<0>(1230782);
- pit8253.out_handler<0>().set(FUNC(m20_state::tty_clock_tick_w));
- pit8253.set_clk<1>(1230782);
- pit8253.out_handler<1>().set(FUNC(m20_state::kbd_clock_tick_w));
- pit8253.set_clk<2>(1230782);
- pit8253.out_handler<2>().set(FUNC(m20_state::timer_tick_w));
-
- PIC8259(config, m_i8259, 0);
- m_i8259->out_int_callback().set(FUNC(m20_state::int_w));
-
- rs232_port_device &kbd(RS232_PORT(config, "kbd", keyboard, "m20"));
- kbd.rxd_handler().set(m_kbdi8251, FUNC(i8251_device::write_rxd));
-
- rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
- rs232.rxd_handler().set(m_ttyi8251, FUNC(i8251_device::write_rxd));
-
- M20_8086(config, m_apb, m_maincpu, m_i8259, RAM_TAG);
-
- SOFTWARE_LIST(config, "flop_list").set_original("m20");
-}
-
-ROM_START(m20)
- ROM_REGION(0x2000,"maincpu", 0)
- ROM_SYSTEM_BIOS( 0, "m20", "M20 1.0" )
- ROMX_LOAD("m20.bin", 0x0000, 0x2000, CRC(5c93d931) SHA1(d51025e087a94c55529d7ee8fd18ff4c46d93230), ROM_BIOS(0))
- ROM_SYSTEM_BIOS( 1, "m20-20d", "M20 2.0d" )
- ROMX_LOAD("m20-20d.bin", 0x0000, 0x2000, CRC(cbe265a6) SHA1(c7cb9d9900b7b5014fcf1ceb2e45a66a91c564d0), ROM_BIOS(1))
- ROM_SYSTEM_BIOS( 2, "m20-20f", "M20 2.0f" )
- ROMX_LOAD("m20-20f.bin", 0x0000, 0x2000, CRC(db7198d8) SHA1(149d8513867081d31c73c2965dabb36d5f308041), ROM_BIOS(2))
-ROM_END
-
-ROM_START(m40)
- ROM_REGION(0x14000,"maincpu", 0)
- ROM_SYSTEM_BIOS( 0, "m40-81", "M40 15.dec.81" )
- ROMX_LOAD( "m40rom-15-dec-81", 0x0000, 0x2000, CRC(e8e7df84) SHA1(e86018043bf5a23ff63434f9beef7ce2972d8153), ROM_BIOS(0))
- ROM_SYSTEM_BIOS( 1, "m40-82", "M40 17.dec.82" )
- ROMX_LOAD( "m40rom-17-dec-82", 0x0000, 0x2000, CRC(cf55681c) SHA1(fe4ae14a6751fef5d7bde49439286f1da3689437), ROM_BIOS(1))
- ROM_SYSTEM_BIOS( 2, "m40-41", "M40 4.1" )
- ROMX_LOAD( "m40rom-4.1", 0x0000, 0x2000, CRC(cf55681c) SHA1(fe4ae14a6751fef5d7bde49439286f1da3689437), ROM_BIOS(2))
- ROM_SYSTEM_BIOS( 3, "m40-60", "M40 6.0" )
- ROMX_LOAD( "m40rom-6.0", 0x0000, 0x4000, CRC(8114ebec) SHA1(4e2c65b95718c77a87dbee0288f323bd1c8837a3), ROM_BIOS(3))
-
- ROM_REGION(0x4000, "apb_bios", ROMREGION_ERASEFF) // Processor board with 8086
-ROM_END
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1981, m20, 0, 0, m20, 0, m20_state, empty_init, "Olivetti", "Olivetti L1 M20", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
-COMP( 1981, m40, m20, 0, m20, 0, m20_state, empty_init, "Olivetti", "Olivetti L1 M40", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )