/*
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 "cpu/z8000/z8000.h"
#include "cpu/i86/i86.h"
#include "video/mc6845.h"
#include "machine/ram.h"
#include "machine/wd_fdc.h"
#include "machine/i8251.h"
#include "machine/i8255.h"
#include "machine/pit8253.h"
#include "machine/pic8259.h"
#include "formats/m20_dsk.h"
#include "machine/keyboard.h"
#define KEYBOARD_TAG "keyboard"
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_p_videoram(*this, "p_videoram"),
m_palette(*this, "palette")
{
}
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_t> m_fd1797;
required_device<floppy_image_device> m_floppy0;
required_device<floppy_image_device> m_floppy1;
required_shared_ptr<UINT16> m_p_videoram;
required_device<palette_device> m_palette;
virtual void machine_start();
virtual void machine_reset();
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(pic_irq_line_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(kbd_tx);
DECLARE_WRITE8_MEMBER(kbd_put);
private:
bool m_kbrecv_in_progress;
int m_kbrecv_bitcount;
offs_t m_memsize;
UINT16 m_kbrecv_data;
UINT8 m_port21;
void install_memory();
public:
DECLARE_DRIVER_INIT(m20);
virtual void video_start();
UINT32 screen_update_m20(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
DECLARE_WRITE_LINE_MEMBER(kbd_rxrdy_int);
DECLARE_FLOPPY_FORMATS( floppy_formats );
IRQ_CALLBACK_MEMBER(m20_irq_callback);
};
#define MAIN_CLOCK 4000000 /* 4 MHz */
#define PIXEL_CLOCK XTAL_4_433619MHz
void m20_state::video_start()
{
}
UINT32 m20_state::screen_update_m20(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
int x,y,i;
UINT8 pen;
UINT32 count;
bitmap.fill(m_palette->black_pen(), cliprect);
count = (0);
for(y=0; y<256; y++)
{
for(x=0; x<512; x+=16)
{
for (i = 0; i < 16; i++)
{
pen = (m_p_videoram[count]) >> (15 - i) & 1;
if (screen.visible_area().contains(x + i, y))
bitmap.pix32(y, x + i) = m_palette->pen(pen);
}
count++;
}
}
return 0;
}
/* TODO: correct hookup for keyboard, keyboard uses 8048 */
WRITE_LINE_MEMBER(m20_state::kbd_tx)
{
UINT8 data;
if (m_kbrecv_in_progress) {
m_kbrecv_bitcount++;
m_kbrecv_data = (m_kbrecv_data >> 1) | (state ? (1<<10) : 0);
if (m_kbrecv_bitcount == 11) {
data = (m_kbrecv_data >> 1) & 0xff;
// printf ("0x%02X received by keyboard\n", data);
switch (data) {
case 0x03: m_kbdi8251->receive_character(2); printf ("sending 2 back from kb...\n"); break;
case 0x0a: break;
case 0x80: m_kbdi8251->receive_character(0x80); printf ("sending 0x80 back from kb...\n");break;
default: logerror("m20: keyboard hack got unexpected %02x\n", data); break;
}
m_kbrecv_in_progress = 0;
}
}
else
{
if (state == 0)
{
m_kbrecv_in_progress = 1;
m_kbrecv_bitcount = 1;
m_kbrecv_data = state ? (1<<10) : 0;
}
}
}
/*
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(NULL);
// density select 1 - sd, 0 - dd
m_fd1797->dden_w(data & 8);
}
READ16_MEMBER(m20_state::m20_i8259_r)
{
return m_i8259->read(space, offset)<<1;
}
WRITE16_MEMBER(m20_state::m20_i8259_w)
{
m_i8259->write(space, offset, (data>>1));
}
WRITE_LINE_MEMBER( m20_state::pic_irq_line_w )
{
if (state)
{
//printf ("PIC raised VI\n");
m_maincpu->set_input_line(1, ASSERT_LINE);
}
else
{
//printf ("PIC lowered VI\n");
m_maincpu->set_input_line(1, CLEAR_LINE);
}
}
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.
*/
m_maincpu->set_input_line(0, 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
*/
static ADDRESS_MAP_START(m20_program_mem, AS_PROGRAM, 16, m20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x30000, 0x33fff ) AM_RAM AM_SHARE("p_videoram")
AM_RANGE( 0x40000, 0x41fff ) AM_ROM AM_REGION("maincpu", 0x00000)
ADDRESS_MAP_END
static ADDRESS_MAP_START(m20_data_mem, AS_DATA, 16, m20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x30000, 0x33fff ) AM_RAM AM_SHARE("p_videoram")
AM_RANGE( 0x40000, 0x41fff ) AM_ROM AM_REGION("maincpu", 0x00000)
ADDRESS_MAP_END
void m20_state::install_memory()
{
m_memsize = m_ram->size();
UINT8 *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, 0x3fff, 0, "dram0_4000");
dspace.install_readwrite_bank(0x0000, 0x3fff, 0x3fff, 0, "dram0_4000");
/* <0>4000 */
pspace.install_readwrite_bank(0x4000, 0x7fff, 0x3fff, 0, "dram0_8000");
/* <0>8000 */
pspace.install_readwrite_bank(0x8000, 0xbfff, 0x3fff, 0, "dram0_c000");
/* <0>C000 */
pspace.install_readwrite_bank(0xc000, 0xcfff, 0x3fff, 0, "dram0_10000");
/* <1>0000 */
pspace.install_readwrite_bank(0x10000, 0x13fff, 0x3fff, 0, "dram0_8000");
dspace.install_readwrite_bank(0x10000, 0x13fff, 0x3fff, 0, "dram0_14000");
/* <1>4000 */
pspace.install_readwrite_bank(0x14000, 0x17fff, 0x3fff, 0, "dram0_c000");
dspace.install_readwrite_bank(0x14000, 0x17fff, 0x3fff, 0, "dram0_18000");
/* <1>8000 */
pspace.install_readwrite_bank(0x18000, 0x1bfff, 0x3fff, 0, "dram0_10000");
dspace.install_readwrite_bank(0x18000, 0x1bfff, 0x3fff, 0, "dram0_1c000");
/* <1>c000 empty*/
/* <2>0000 */
pspace.install_readwrite_bank(0x20000, 0x23fff, 0x3fff, 0, "dram0_14000");
dspace.install_readwrite_bank(0x20000, 0x23fff, 0x3fff, 0, "dram0_14000");
/* <2>4000 */
pspace.install_readwrite_bank(0x24000, 0x27fff, 0x3fff, 0, "dram0_18000");
dspace.install_readwrite_bank(0x24000, 0x27fff, 0x3fff, 0, "dram0_18000");
/* <2>8000 */
pspace.install_readwrite_bank(0x28000, 0x2bfff, 0x3fff, 0, "dram0_1c000");
dspace.install_readwrite_bank(0x28000, 0x2bfff, 0x3fff, 0, "dram0_1c000");
/* <2>c000 empty*/
/* <3>0000 (video buffer)
pspace.install_readwrite_bank(0x30000, 0x33fff, 0x3fff, 0, "dram0_0000");
dspace.install_readwrite_bank(0x30000, 0x33fff, 0x3fff, 0, "dram0_0000");
*/
/* <5>0000 */
dspace.install_readwrite_bank(0x50000, 0x53fff, 0x3fff, 0, "dram0_8000");
/* <5>4000 */
dspace.install_readwrite_bank(0x54000, 0x57fff, 0x3fff, 0, "dram0_c000");
/* <5>8000 */
dspace.install_readwrite_bank(0x58000, 0x5bfff, 0x3fff, 0, "dram0_10000");
/* <5>c000 expansion bus */
/* <6>0000 */
pspace.install_readwrite_bank(0x60000, 0x63fff, 0x3fff, 0, "dram0_8000");
dspace.install_readwrite_bank(0x60000, 0x63fff, 0x3fff, 0, "dram0_8000");
/* <6>4000 */
pspace.install_readwrite_bank(0x64000, 0x67fff, 0x3fff, 0, "dram0_c000");
dspace.install_readwrite_bank(0x64000, 0x67fff, 0x3fff, 0, "dram0_c000");
/* <6>8000 */
pspace.install_readwrite_bank(0x68000, 0x6bfff, 0x3fff, 0, "dram0_10000");
dspace.install_readwrite_bank(0x68000, 0x6bfff, 0x3fff, 0, "dram0_10000");
/* <6>c000 empty*/
/* segment <7> expansion ROM? */
/* <8>0000 */
pspace.install_readwrite_bank(0x80000, 0x83fff, 0x3fff, 0, "dram0_8000");
dspace.install_readwrite_bank(0x80000, 0x83fff, 0x3fff, 0, "dram0_18000");
/* <8>4000 */
pspace.install_readwrite_bank(0x84000, 0x87fff, 0x3fff, 0, "dram0_c000");
dspace.install_readwrite_bank(0x84000, 0x87fff, 0x3fff, 0, "dram0_1c000");
/* <9>0000 */
pspace.install_readwrite_bank(0x90000, 0x93fff, 0x3fff, 0, "dram0_18000");
dspace.install_readwrite_bank(0x90000, 0x93fff, 0x3fff, 0, "dram0_18000");
/* <9>4000 */
pspace.install_readwrite_bank(0x94000, 0x97fff, 0x3fff, 0, "dram0_1c000");
dspace.install_readwrite_bank(0x94000, 0x97fff, 0x3fff, 0, "dram0_1c000");
/* <A>0000 */
pspace.install_readwrite_bank(0xa0000, 0xa3fff, 0x3fff, 0, "dram0_8000");
dspace.install_readwrite_bank(0xa0000, 0xa3fff, 0x3fff, 0, "dram0_8000");
/* <A>4000 */
pspace.install_readwrite_bank(0xa4000, 0xa7fff, 0x3fff, 0, "dram0_c000");
dspace.install_readwrite_bank(0xa4000, 0xa7fff, 0x3fff, 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
AM_RANGE( 0x2c000, 0x2ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0x88000, 0x8bfff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0xa8000, 0xabfff ) AM_RAM AM_SHARE("dram1_4000")
*/
pspace.install_readwrite_bank(0x2c000, 0x2ffff, 0x3fff, 0, "dram1_0000");
pspace.install_readwrite_bank(0x88000, 0x8bfff, 0x3fff, 0, "dram1_4000");
pspace.install_readwrite_bank(0xa8000, 0xabfff, 0x3fff, 0, "dram1_4000");
/*
data
AM_RANGE( 0x04000, 0x07fff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0x1c000, 0x1ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0x2c000, 0x2ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0xa8000, 0xabfff ) AM_RAM AM_SHARE("dram1_4000")
*/
dspace.install_readwrite_bank(0x4000, 0x7fff, 0x3fff, 0, "dram1_4000");
dspace.install_readwrite_bank(0x1c000, 0x1ffff, 0x3fff, 0, "dram1_0000");
dspace.install_readwrite_bank(0x2c000, 0x2ffff, 0x3fff, 0, "dram1_0000");
dspace.install_readwrite_bank(0xa8000, 0xabfff, 0x3fff, 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
AM_RANGE( 0x8c000, 0x8ffff ) AM_RAM AM_SHARE("dram2_0000")
AM_RANGE( 0x98000, 0x9bfff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0xac000, 0xaffff ) AM_RAM AM_SHARE("dram2_0000")
*/
pspace.install_readwrite_bank(0x8c000, 0x8ffff, 0x3fff, 0, "dram2_0000");
pspace.install_readwrite_bank(0x98000, 0x9bfff, 0x3fff, 0, "dram2_4000");
pspace.install_readwrite_bank(0xac000, 0xaffff, 0x3fff, 0, "dram2_0000");
/* data
AM_RANGE( 0x08000, 0x0bfff ) AM_RAM AM_SHARE("dram2_0000")
AM_RANGE( 0x0c000, 0x0ffff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0x88000, 0x8bfff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0x98000, 0x9bfff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0xac000, 0xaffff ) AM_RAM AM_SHARE("dram2_0000")
*/
dspace.install_readwrite_bank(0x8000, 0xbfff, 0x3fff, 0, "dram2_0000");
dspace.install_readwrite_bank(0xc000, 0xffff, 0x3fff, 0, "dram2_4000");
dspace.install_readwrite_bank(0x88000, 0x8bfff, 0x3fff, 0, "dram2_4000");
dspace.install_readwrite_bank(0x98000, 0x9bfff, 0x3fff, 0, "dram2_4000");
dspace.install_readwrite_bank(0xac000, 0xaffff, 0x3fff, 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
AM_RANGE( 0x9c000, 0x9ffff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0xb0000, 0xb3fff ) AM_RAM AM_SHARE("dram3_4000")
*/
pspace.install_readwrite_bank(0x9c000, 0x9ffff, 0x3fff, 0, "dram3_0000");
pspace.install_readwrite_bank(0xb0000, 0xb3fff, 0x3fff, 0, "dram3_4000");
/* data
AM_RANGE( 0x44000, 0x47fff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0x48000, 0x4bfff ) AM_RAM AM_SHARE("dram3_4000")
AM_RANGE( 0x8c000, 0x8ffff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0x9c000, 0x9ffff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0xb0000, 0xb3fff ) AM_RAM AM_SHARE("dram3_4000")
AM_RANGE( 0xc0000, 0xc3fff ) AM_RAM AM_SHARE("dram3_4000")
*/
dspace.install_readwrite_bank(0x44000, 0x47fff, 0x3fff, 0, "dram3_0000");
dspace.install_readwrite_bank(0x48000, 0x4bfff, 0x3fff, 0, "dram3_4000");
dspace.install_readwrite_bank(0x8c000, 0x8ffff, 0x3fff, 0, "dram3_0000");
dspace.install_readwrite_bank(0x9c000, 0x9ffff, 0x3fff, 0, "dram3_0000");
dspace.install_readwrite_bank(0xb0000, 0xb3fff, 0x3fff, 0, "dram3_4000");
dspace.install_readwrite_bank(0xc0000, 0xc3fff, 0x3fff, 0, "dram3_4000");
membank("dram3_0000")->set_base(memptr + 0x30000);
membank("dram3_4000")->set_base(memptr + 0x34000);
}
}
else {
/* 128K expansion cards */
/* DRAM1, 128K */
/* prog
AM_RANGE( 0x2c000, 0x2ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0x88000, 0x8bfff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0x8c000, 0x8ffff ) AM_RAM AM_SHARE("dram1_8000")
AM_RANGE( 0x98000, 0x9bfff ) AM_RAM AM_SHARE("dram1_c000")
AM_RANGE( 0x9c000, 0x9ffff ) AM_RAM AM_SHARE("dram1_10000")
AM_RANGE( 0xa8000, 0xabfff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0xac000, 0xaffff ) AM_RAM AM_SHARE("dram1_8000")
AM_RANGE( 0xb0000, 0xb3fff ) AM_RAM AM_SHARE("dram1_14000")
AM_RANGE( 0xb4000, 0xb7fff ) AM_RAM AM_SHARE("dram1_18000")
AM_RANGE( 0xb8000, 0xbbfff ) AM_RAM AM_SHARE("dram1_1c000")
*/
pspace.install_readwrite_bank(0x2c000, 0x2ffff, 0x3fff, 0, "dram1_0000");
pspace.install_readwrite_bank(0x88000, 0x8bfff, 0x3fff, 0, "dram1_4000");
pspace.install_readwrite_bank(0x8c000, 0x8ffff, 0x3fff, 0, "dram1_8000");
pspace.install_readwrite_bank(0x98000, 0x9bfff, 0x3fff, 0, "dram1_c000");
pspace.install_readwrite_bank(0x9c000, 0x9ffff, 0x3fff, 0, "dram1_10000");
pspace.install_readwrite_bank(0xa8000, 0xabfff, 0x3fff, 0, "dram1_4000");
pspace.install_readwrite_bank(0xac000, 0xaffff, 0x3fff, 0, "dram1_8000");
pspace.install_readwrite_bank(0xb0000, 0xb3fff, 0x3fff, 0, "dram1_14000");
pspace.install_readwrite_bank(0xb4000, 0xb7fff, 0x3fff, 0, "dram1_18000");
pspace.install_readwrite_bank(0xb8000, 0xbbfff, 0x3fff, 0, "dram1_1c000");
/* data
AM_RANGE( 0x04000, 0x07fff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0x1c000, 0x1ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0x2c000, 0x2ffff ) AM_RAM AM_SHARE("dram1_0000")
AM_RANGE( 0x88000, 0x8bfff ) AM_RAM AM_SHARE("dram1_c000")
AM_RANGE( 0x8c000, 0x8ffff ) AM_RAM AM_SHARE("dram1_10000")
AM_RANGE( 0x98000, 0x9bfff ) AM_RAM AM_SHARE("dram1_c000")
AM_RANGE( 0x9c000, 0x9ffff ) AM_RAM AM_SHARE("dram1_10000")
AM_RANGE( 0xa8000, 0xabfff ) AM_RAM AM_SHARE("dram1_4000")
AM_RANGE( 0xac000, 0xaffff ) AM_RAM AM_SHARE("dram1_8000")
AM_RANGE( 0xb0000, 0xb3fff ) AM_RAM AM_SHARE("dram1_14000")
AM_RANGE( 0xb4000, 0xb7fff ) AM_RAM AM_SHARE("dram1_18000")
AM_RANGE( 0xb8000, 0xbbfff ) AM_RAM AM_SHARE("dram1_1c000")
*/
dspace.install_readwrite_bank(0x4000, 0x7fff, 0x3fff, 0, "dram1_4000");
dspace.install_readwrite_bank(0x1c000, 0x1ffff, 0x3fff, 0, "dram1_0000");
dspace.install_readwrite_bank(0x2c000, 0x2ffff, 0x3fff, 0, "dram1_0000");
dspace.install_readwrite_bank(0x88000, 0x8bfff, 0x3fff, 0, "dram1_c000");
dspace.install_readwrite_bank(0x8c000, 0x8ffff, 0x3fff, 0, "dram1_10000");
dspace.install_readwrite_bank(0x98000, 0x9bfff, 0x3fff, 0, "dram1_c000");
dspace.install_readwrite_bank(0x9c000, 0x9ffff, 0x3fff, 0, "dram1_10000");
dspace.install_readwrite_bank(0xa8000, 0xabfff, 0x3fff, 0, "dram1_4000");
dspace.install_readwrite_bank(0xac000, 0xaffff, 0x3fff, 0, "dram1_8000");
dspace.install_readwrite_bank(0xb0000, 0xb3fff, 0x3fff, 0, "dram1_14000");
dspace.install_readwrite_bank(0xb4000, 0xb7fff, 0x3fff, 0, "dram1_18000");
dspace.install_readwrite_bank(0xb8000, 0xbbfff, 0x3fff, 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
AM_RANGE( 0xbc000, 0xbffff ) AM_RAM AM_SHARE("dram2_0000")
AM_RANGE( 0xc0000, 0xc3fff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0xc4000, 0xc7fff ) AM_RAM AM_SHARE("dram2_8000")
AM_RANGE( 0xc8000, 0xcbfff ) AM_RAM AM_SHARE("dram2_c000")
AM_RANGE( 0xcc000, 0xcffff ) AM_RAM AM_SHARE("dram2_10000")
AM_RANGE( 0xd0000, 0xd3fff ) AM_RAM AM_SHARE("dram2_14000")
AM_RANGE( 0xd4000, 0xd7fff ) AM_RAM AM_SHARE("dram2_18000")
AM_RANGE( 0xd8000, 0xdbfff ) AM_RAM AM_SHARE("dram2_1c000")
*/
pspace.install_readwrite_bank(0xbc000, 0xbffff, 0x3fff, 0, "dram2_0000");
pspace.install_readwrite_bank(0xc0000, 0xc3fff, 0x3fff, 0, "dram2_4000");
pspace.install_readwrite_bank(0xc4000, 0xc7fff, 0x3fff, 0, "dram2_8000");
pspace.install_readwrite_bank(0xc8000, 0xcbfff, 0x3fff, 0, "dram2_c000");
pspace.install_readwrite_bank(0xcc000, 0xcffff, 0x3fff, 0, "dram2_10000");
pspace.install_readwrite_bank(0xd0000, 0xd3fff, 0x3fff, 0, "dram2_14000");
pspace.install_readwrite_bank(0xd4000, 0xd7fff, 0x3fff, 0, "dram2_18000");
pspace.install_readwrite_bank(0xd8000, 0xdbfff, 0x3fff, 0, "dram2_1c000");
/* data
AM_RANGE( 0x08000, 0x0bfff ) AM_RAM AM_SHARE("dram2_0000")
AM_RANGE( 0x0c000, 0x0ffff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0xbc000, 0xbffff ) AM_RAM AM_SHARE("dram2_0000")
AM_RANGE( 0xc0000, 0xc3fff ) AM_RAM AM_SHARE("dram2_4000")
AM_RANGE( 0xc4000, 0xc7fff ) AM_RAM AM_SHARE("dram2_8000")
AM_RANGE( 0xc8000, 0xcbfff ) AM_RAM AM_SHARE("dram2_c000")
AM_RANGE( 0xcc000, 0xcffff ) AM_RAM AM_SHARE("dram2_10000")
AM_RANGE( 0xd0000, 0xd3fff ) AM_RAM AM_SHARE("dram2_14000")
AM_RANGE( 0xd4000, 0xd7fff ) AM_RAM AM_SHARE("dram2_18000")
AM_RANGE( 0xd8000, 0xdbfff ) AM_RAM AM_SHARE("dram2_1c000")
*/
dspace.install_readwrite_bank(0x8000, 0xbfff, 0x3fff, 0, "dram2_0000");
dspace.install_readwrite_bank(0xc000, 0xffff, 0x3fff, 0, "dram2_4000");
dspace.install_readwrite_bank(0xbc000, 0xbffff, 0x3fff, 0, "dram2_0000");
dspace.install_readwrite_bank(0xc0000, 0xc3fff, 0x3fff, 0, "dram2_4000");
dspace.install_readwrite_bank(0xc4000, 0xc7fff, 0x3fff, 0, "dram2_8000");
dspace.install_readwrite_bank(0xc8000, 0xcbfff, 0x3fff, 0, "dram2_c000");
dspace.install_readwrite_bank(0xcc000, 0xcffff, 0x3fff, 0, "dram2_10000");
dspace.install_readwrite_bank(0xd0000, 0xd3fff, 0x3fff, 0, "dram2_14000");
dspace.install_readwrite_bank(0xd4000, 0xd7fff, 0x3fff, 0, "dram2_18000");
dspace.install_readwrite_bank(0xd8000, 0xdbfff, 0x3fff, 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
AM_RANGE( 0xdc000, 0xdffff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0xe0000, 0xe3fff ) AM_RAM AM_SHARE("dram3_4000")
AM_RANGE( 0xe4000, 0xe7fff ) AM_RAM AM_SHARE("dram3_8000")
AM_RANGE( 0xe8000, 0xebfff ) AM_RAM AM_SHARE("dram3_c000")
AM_RANGE( 0xec000, 0xeffff ) AM_RAM AM_SHARE("dram3_10000")
AM_RANGE( 0xf0000, 0xf3fff ) AM_RAM AM_SHARE("dram3_14000")
AM_RANGE( 0xf4000, 0xf7fff ) AM_RAM AM_SHARE("dram3_18000")
AM_RANGE( 0xf8000, 0xfbfff ) AM_RAM AM_SHARE("dram3_1c000")
AM_RANGE( 0xfc000, 0xfffff ) AM_RAM AM_SHARE("dram3_0000")
*/
pspace.install_readwrite_bank(0xdc000, 0xdffff, 0x3fff, 0, "dram3_0000");
pspace.install_readwrite_bank(0xe0000, 0xe3fff, 0x3fff, 0, "dram3_4000");
pspace.install_readwrite_bank(0xe4000, 0xe7fff, 0x3fff, 0, "dram3_8000");
pspace.install_readwrite_bank(0xe8000, 0xebfff, 0x3fff, 0, "dram3_c000");
pspace.install_readwrite_bank(0xec000, 0xeffff, 0x3fff, 0, "dram3_10000");
pspace.install_readwrite_bank(0xf0000, 0xf3fff, 0x3fff, 0, "dram3_14000");
pspace.install_readwrite_bank(0xf4000, 0xf7fff, 0x3fff, 0, "dram3_18000");
pspace.install_readwrite_bank(0xf8000, 0xfbfff, 0x3fff, 0, "dram3_1c000");
pspace.install_readwrite_bank(0xfc000, 0xfffff, 0x3fff, 0, "dram3_0000");
/* data
AM_RANGE( 0x44000, 0x47fff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0x48000, 0x4bfff ) AM_RAM AM_SHARE("dram3_4000")
AM_RANGE( 0xdc000, 0xdffff ) AM_RAM AM_SHARE("dram3_0000")
AM_RANGE( 0xe0000, 0xe3fff ) AM_RAM AM_SHARE("dram3_4000")
AM_RANGE( 0xe4000, 0xe7fff ) AM_RAM AM_SHARE("dram3_8000")
AM_RANGE( 0xe8000, 0xebfff ) AM_RAM AM_SHARE("dram3_c000")
AM_RANGE( 0xec000, 0xeffff ) AM_RAM AM_SHARE("dram3_10000")
AM_RANGE( 0xf0000, 0xf3fff ) AM_RAM AM_SHARE("dram3_14000")
AM_RANGE( 0xf4000, 0xf7fff ) AM_RAM AM_SHARE("dram3_18000")
AM_RANGE( 0xf8000, 0xfbfff ) AM_RAM AM_SHARE("dram3_1c000")
AM_RANGE( 0xfc000, 0xfffff ) AM_RAM AM_SHARE("dram3_0000")
*/
dspace.install_readwrite_bank(0x44000, 0x47fff, 0x3fff, 0, "dram3_0000");
dspace.install_readwrite_bank(0x48000, 0x4bfff, 0x3fff, 0, "dram3_4000");
dspace.install_readwrite_bank(0xdc000, 0xdffff, 0x3fff, 0, "dram3_0000");
dspace.install_readwrite_bank(0xe0000, 0xe3fff, 0x3fff, 0, "dram3_4000");
dspace.install_readwrite_bank(0xe4000, 0xe7fff, 0x3fff, 0, "dram3_8000");
dspace.install_readwrite_bank(0xe8000, 0xebfff, 0x3fff, 0, "dram3_c000");
dspace.install_readwrite_bank(0xec000, 0xeffff, 0x3fff, 0, "dram3_10000");
dspace.install_readwrite_bank(0xf0000, 0xf3fff, 0x3fff, 0, "dram3_14000");
dspace.install_readwrite_bank(0xf4000, 0xf7fff, 0x3fff, 0, "dram3_18000");
dspace.install_readwrite_bank(0xf8000, 0xfbfff, 0x3fff, 0, "dram3_1c000");
dspace.install_readwrite_bank(0xfc000, 0xfffff, 0x3fff, 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);
}
}
}
}
static ADDRESS_MAP_START(m20_io, AS_IO, 16, m20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00, 0x07) AM_DEVREADWRITE8("fd1797", fd1797_t, read, write, 0x00ff)
AM_RANGE(0x20, 0x21) AM_READWRITE(port21_r, port21_w);
AM_RANGE(0x60, 0x61) AM_DEVWRITE8("crtc", mc6845_device, address_w, 0x00ff)
AM_RANGE(0x62, 0x63) AM_DEVREADWRITE8("crtc", mc6845_device, register_r, register_w, 0x00ff)
AM_RANGE(0x80, 0x87) AM_DEVREADWRITE8("ppi8255", i8255_device, read, write, 0x00ff)
AM_RANGE(0xa0, 0xa1) AM_DEVREADWRITE8("i8251_1", i8251_device, data_r, data_w, 0x00ff)
AM_RANGE(0xa2, 0xa3) AM_DEVREADWRITE8("i8251_1", i8251_device, status_r, control_w, 0x00ff)
AM_RANGE(0xc0, 0xc1) AM_DEVREADWRITE8("i8251_2", i8251_device, data_r, data_w, 0x00ff)
AM_RANGE(0xc2, 0xc3) AM_DEVREADWRITE8("i8251_2", i8251_device, status_r, control_w, 0x00ff)
AM_RANGE(0x120, 0x127) AM_DEVREADWRITE8("pit8253", pit8253_device, read, write, 0x00ff)
AM_RANGE(0x140, 0x143) AM_READWRITE(m20_i8259_r, m20_i8259_w)
ADDRESS_MAP_END
#if 0
static ADDRESS_MAP_START(m20_apb_mem, AS_PROGRAM, 16, m20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x00000, 0x007ff ) AM_RAM
AM_RANGE( 0xf0000, 0xf7fff ) AM_RAM //mirrored?
AM_RANGE( 0xfc000, 0xfffff ) AM_ROM AM_REGION("apb_bios",0)
ADDRESS_MAP_END
static ADDRESS_MAP_START(m20_apb_io, AS_IO, 16, m20_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff) // may not be needed
//0x4060 crtc address
//0x4062 crtc data
ADDRESS_MAP_END
#endif
static INPUT_PORTS_START( m20 )
INPUT_PORTS_END
DRIVER_INIT_MEMBER(m20_state,m20)
{
}
IRQ_CALLBACK_MEMBER(m20_state::m20_irq_callback)
{
if (! irqline)
return 0xff; // NVI, value ignored
else
return m_i8259->acknowledge();
}
void m20_state::machine_start()
{
install_memory();
}
void m20_state::machine_reset()
{
UINT8 *ROM = memregion("maincpu")->base();
UINT8 *RAM = (UINT8 *)(m_ram->pointer() + 0x4000);
if (m_memsize >= 256 * 1024)
m_port21 = 0xdf;
else
m_port21 = 0xff;
m_fd1797->reset();
memcpy(RAM, ROM, 8); // we need only the reset vector
m_maincpu->reset(); // reset the CPU to ensure it picks up the new vector
}
WRITE_LINE_MEMBER(m20_state::kbd_rxrdy_int)
{
m_i8259->ir4_w(state);
}
static unsigned char kbxlat[] =
{
0x00, '\\', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '-', '^', '@', '[', ';', ':', ']', ',', '.', '/',
0x00, '<', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '_', '!', '"', '#',
'$', '%', '&', '\'','(', ')', '=', 'x', 'x', '{', '+', '*', '}'
};
WRITE8_MEMBER( m20_state::kbd_put )
{
if (data) {
if (data == 0xd) data = 0xc1;
else if (data == 0x20) data = 0xc0;
else if (data == 8) data = 0x69; /* ^H */
else if (data == 3) data = 0x64; /* ^C */
else {
int i;
for (i = 0; i < sizeof(kbxlat); i++)
if (data == kbxlat[i]) {
data = i;
break;
}
}
printf("kbd_put called with 0x%02X\n", data);
m_kbdi8251->receive_character(data);
}
}
static SLOT_INTERFACE_START( m20_floppies )
SLOT_INTERFACE( "5dd", FLOPPY_525_DD )
SLOT_INTERFACE_END
FLOPPY_FORMATS_MEMBER( m20_state::floppy_formats )
FLOPPY_M20_FORMAT
FLOPPY_FORMATS_END
static MACHINE_CONFIG_START( m20, m20_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z8001, MAIN_CLOCK)
MCFG_CPU_PROGRAM_MAP(m20_program_mem)
MCFG_CPU_DATA_MAP(m20_data_mem)
MCFG_CPU_IO_MAP(m20_io)
MCFG_CPU_IRQ_ACKNOWLEDGE_DRIVER(m20_state,m20_irq_callback)
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("160K")
MCFG_RAM_DEFAULT_VALUE(0)
MCFG_RAM_EXTRA_OPTIONS("128K,192K,224K,256K,384K,512K")
#if 0
MCFG_CPU_ADD("apb", I8086, MAIN_CLOCK)
MCFG_CPU_PROGRAM_MAP(m20_apb_mem)
MCFG_CPU_IO_MAP(m20_apb_io)
MCFG_DEVICE_DISABLE()
#endif
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(512, 256)
MCFG_SCREEN_VISIBLE_AREA(0, 512-1, 0, 256-1)
MCFG_SCREEN_UPDATE_DRIVER(m20_state, screen_update_m20)
MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
/* Devices */
MCFG_FD1797x_ADD("fd1797", 1000000)
MCFG_WD_FDC_INTRQ_CALLBACK(DEVWRITELINE("i8259", pic8259_device, ir0_w))
MCFG_FLOPPY_DRIVE_ADD("fd1797:0", m20_floppies, "5dd", m20_state::floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("fd1797:1", m20_floppies, "5dd", m20_state::floppy_formats)
MCFG_MC6845_ADD("crtc", MC6845, "screen", PIXEL_CLOCK/8) /* hand tuned to get ~50 fps */
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(16)
MCFG_DEVICE_ADD("ppi8255", I8255A, 0)
MCFG_DEVICE_ADD("i8251_1", I8251, 0)
MCFG_I8251_TXD_HANDLER(WRITELINE(m20_state, kbd_tx))
MCFG_I8251_RXRDY_HANDLER(WRITELINE(m20_state, kbd_rxrdy_int))
MCFG_DEVICE_ADD("i8251_2", I8251, 0)
MCFG_DEVICE_ADD("pit8253", PIT8253, 0)
MCFG_PIT8253_CLK0(1230782)
MCFG_PIT8253_OUT0_HANDLER(WRITELINE(m20_state, tty_clock_tick_w))
MCFG_PIT8253_CLK1(1230782)
MCFG_PIT8253_OUT1_HANDLER(WRITELINE(m20_state, kbd_clock_tick_w))
MCFG_PIT8253_CLK2(1230782)
MCFG_PIT8253_OUT2_HANDLER(WRITELINE(m20_state, timer_tick_w))
MCFG_PIC8259_ADD("i8259", WRITELINE(m20_state, pic_irq_line_w), VCC, NULL)
MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0)
MCFG_GENERIC_KEYBOARD_CB(WRITE8(m20_state, kbd_put))
MCFG_SOFTWARE_LIST_ADD("flop_list","m20")
MACHINE_CONFIG_END
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(1))
ROM_SYSTEM_BIOS( 1, "m20-20d", "M20 2.0d" )
ROMX_LOAD("m20-20d.bin", 0x0000, 0x2000, CRC(cbe265a6) SHA1(c7cb9d9900b7b5014fcf1ceb2e45a66a91c564d0), ROM_BIOS(2))
ROM_SYSTEM_BIOS( 2, "m20-20f", "M20 2.0f" )
ROMX_LOAD("m20-20f.bin", 0x0000, 0x2000, CRC(db7198d8) SHA1(149d8513867081d31c73c2965dabb36d5f308041), ROM_BIOS(3))
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(1))
ROM_SYSTEM_BIOS( 1, "m40-82", "M40 17.dec.82" )
ROMX_LOAD( "m40rom-17-dec-82", 0x0000, 0x2000, CRC(cf55681c) SHA1(fe4ae14a6751fef5d7bde49439286f1da3689437), ROM_BIOS(2))
ROM_SYSTEM_BIOS( 2, "m40-41", "M40 4.1" )
ROMX_LOAD( "m40rom-4.1", 0x0000, 0x2000, CRC(cf55681c) SHA1(fe4ae14a6751fef5d7bde49439286f1da3689437), ROM_BIOS(3))
ROM_SYSTEM_BIOS( 3, "m40-60", "M40 6.0" )
ROMX_LOAD( "m40rom-6.0", 0x0000, 0x4000, CRC(8114ebec) SHA1(4e2c65b95718c77a87dbee0288f323bd1c8837a3), ROM_BIOS(4))
ROM_REGION(0x4000, "apb_bios", ROMREGION_ERASEFF) // Processor board with 8086
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1981, m20, 0, 0, m20, m20, m20_state, m20, "Olivetti", "Olivetti L1 M20", GAME_NOT_WORKING | GAME_NO_SOUND)
COMP( 1981, m40, m20, 0, m20, m20, m20_state, m20, "Olivetti", "Olivetti L1 M40", GAME_NOT_WORKING | GAME_NO_SOUND)