// license:BSD-3-Clause
// copyright-holders:F. Ulivi
//
// ***************************************
// Driver for Intel Intellec MDS series-II
// ***************************************
//
// Documentation used for this driver:
// [1] Intel, manual 9800554-04 rev. D - Intellec series II MDS - Schematic drawings
// [2] Intel, manual 9800556-02 rev. B - Intellec series II MDS - Hardware reference manual
// [3] Intel, manual 9800555-02 rev. B - Intellec series II MDS - Hardware interface manual
// [4] Intel, manual 9800605-02 rev. B - Intellec series II MDS - Boot/monitor listing
//
// All these manuals are available on http://www.bitsavers.org
//
// An Intellec MDS series-II is composed of the following boards:
//
// **********
// Integrated Processor Card (IPC) or Integrated Processor Board (IPB)
//
// This is the board where the OS (ISIS-II) and the application software run.
// This driver emulates an IPC.
// IPC is composed as follows:
// A83 8085A-2 CPU @ 4 MHz
// 64k of DRAM
// A82 2732 EPROM with monitor & boot firmware (assembly source of this ROM is in [4])
// A66 8259A System PIC
// A89 8259A Local PIC
// A86 8253 PIT
// A91 8251A Serial channel #0
// A90 8251A Serial channel #1
//
// **********
// I/O Controller (IOC)
//
// This board acts as a controller for all I/O of the system.
// It is structured as if it were 2 boards in one:
// One part (around 8080) controls Keyboard, CRT & floppy, the other part (around PIO 8041A) controls all parallel I/Os
// (Line printer, Paper tape puncher, Paper tape reader, I/O to PROM programmer).
// Both parts are interfaced to IPC through a bidirectional 8-bit bus.
// IOC is composed of these parts:
// A69 8080A-2 CPU @ 2.448 MHz
// 8k of DRAM
// A50 2716
// A51 2716
// A52 2716
// A53 2716 EPROMs with IOC firmware
// A58 8257 DMA controller
// A35 8253 PIT
// A1 8271 Floppy controller
// A20 8275 CRT controller
// A19 2708 Character generator ROM
// LS1 3.3 kHz beeper
// A72 8041A CPU @ 6 MHz (PIO: parallel I/O)
//
// **********
// Keyboard controller
//
// Keyboard is controlled by a 8741 CPU that scans the key matrix and sends key codes to IOC through a 8-bit bus.
//
// A3 8741 CPU @ 3.58 MHz
//
// NOTE:
// Firmware running on PIO is NOT original because a dump is not available at the moment.
// Emulator runs a version of PIO firmware that was specifically developed by me to implement
// line printer output.
//
// TODO:
// - Find a dump of the original PIO firmware
// - Adjust speed of processors. Wait states are not accounted for yet.
//
// Huge thanks to Dave Mabry for dumping IOC firmware, KB firmware and character generator. This driver would not
// exist without his dumps.
// (https://web.archive.org/web/20080509062332/http://www.s100-manuals.com/intel/IOC_iMDX_511_Upgrade.zip)
//
// Basic usage / test info:
// To use the system set DIP switches to:
// Floppy present
// IOC mode Diagnostic
// Keyboard present
// and reset the system. The built-in diagnostic mode should start.
//
// Another test is loading ISIS-II (the Intel OS for this system). Floppy image
// 9500007-07_ISIS-II_OPERATING_SYSTEM_DISKETTE_Ver_4.3.IMD
// To load it, the "IOC mode" should be set to "On line", the floppy image
// should be mounted and the system reset. After a few seconds the ISIS-II
// prompt should appear. A command that could be tried is "DIR" that lists
// the content of floppy disk.
#include "emu.h"
#include "includes/imds2.h"
#include "screen.h"
#include "speaker.h"
// CPU oscillator of IPC board: 8 MHz
#define IPC_XTAL_Y2 XTAL(8'000'000)
// Y1 oscillator of IPC board: 19.6608 MHz
#define IPC_XTAL_Y1 XTAL(19'660'800)
// Main oscillator of IOC board: 22.032 MHz
#define IOC_XTAL_Y2 22032000
// FDC oscillator of IOC board: 8 MHz
#define IOC_XTAL_Y1 XTAL(8'000'000)
// PIO oscillator: 6 MHz
#define IOC_XTAL_Y3 XTAL(6'000'000)
// Frequency of beeper
#define IOC_BEEP_FREQ 3300
void imds2_state::ipc_mem_map(address_map &map)
{
map(0x0000, 0xffff).rw(this, FUNC(imds2_state::ipc_mem_read), FUNC(imds2_state::ipc_mem_write));
}
void imds2_state::ipc_io_map(address_map &map)
{
map.unmap_value_low();
map(0xc0, 0xc0).rw(this, FUNC(imds2_state::imds2_ipc_dbbout_r), FUNC(imds2_state::imds2_ipc_dbbin_data_w));
map(0xc1, 0xc1).rw(this, FUNC(imds2_state::imds2_ipc_status_r), FUNC(imds2_state::imds2_ipc_dbbin_cmd_w));
map(0xf0, 0xf3).rw(m_ipctimer, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
map(0xf4, 0xf4).rw(m_ipcusart0, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
map(0xf5, 0xf5).rw(m_ipcusart0, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
map(0xf6, 0xf6).rw(m_ipcusart1, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
map(0xf7, 0xf7).rw(m_ipcusart1, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
map(0xf8, 0xf9).rw(m_iocpio, FUNC(i8041_device::upi41_master_r), FUNC(i8041_device::upi41_master_w));
map(0xfa, 0xfb).rw(this, FUNC(imds2_state::imds2_ipclocpic_r), FUNC(imds2_state::imds2_ipclocpic_w));
map(0xfc, 0xfd).rw(this, FUNC(imds2_state::imds2_ipcsyspic_r), FUNC(imds2_state::imds2_ipcsyspic_w));
map(0xff, 0xff).w(this, FUNC(imds2_state::imds2_ipc_control_w));
}
void imds2_state::ioc_mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x1fff).rom();
map(0x4000, 0x5fff).ram();
}
void imds2_state::ioc_io_map(address_map &map)
{
map.unmap_value_high();
map(0x00, 0x0f).w(this, FUNC(imds2_state::imds2_ioc_dbbout_w));
map(0x20, 0x2f).w(this, FUNC(imds2_state::imds2_ioc_f0_w));
map(0x30, 0x3f).w(this, FUNC(imds2_state::imds2_ioc_set_f1_w));
map(0x40, 0x4f).w(this, FUNC(imds2_state::imds2_ioc_reset_f1_w));
map(0x50, 0x5f).w(this, FUNC(imds2_state::imds2_start_timer_w));
map(0x60, 0x6f).w(this, FUNC(imds2_state::imds2_miscout_w));
map(0x80, 0x8f).r(this, FUNC(imds2_state::imds2_miscin_r));
map(0x90, 0x9f).r(this, FUNC(imds2_state::imds2_kb_read));
map(0xa0, 0xaf).r(this, FUNC(imds2_state::imds2_ioc_status_r));
map(0xb0, 0xbf).r(this, FUNC(imds2_state::imds2_ioc_dbbin_r));
map(0xc0, 0xcf).m(m_iocfdc, FUNC(i8271_device::map));
map(0xd0, 0xdf).rw(m_ioccrtc, FUNC(i8275_device::read), FUNC(i8275_device::write));
map(0xe0, 0xef).rw(m_ioctimer, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
// DMA controller range doesn't extend to 0xff because register 0xfd needs to be read as 0xff
// This register is used by IOC firmware to detect DMA controller model (either 8237 or 8257)
map(0xf0, 0xf8).rw(m_iocdma, FUNC(i8257_device::read), FUNC(i8257_device::write));
}
imds2_state::imds2_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig , type , tag),
m_ipccpu(*this , "ipccpu"),
m_ipcsyspic(*this , "ipcsyspic"),
m_ipclocpic(*this , "ipclocpic"),
m_ipctimer(*this , "ipctimer"),
m_ipcusart0(*this , "ipcusart0"),
m_ipcusart1(*this , "ipcusart1"),
m_serial0(*this , "serial0"),
m_serial1(*this , "serial1"),
m_ioccpu(*this , "ioccpu"),
m_iocdma(*this , "iocdma"),
m_ioccrtc(*this , "ioccrtc"),
m_iocbeep(*this , "iocbeep"),
m_ioctimer(*this , "ioctimer"),
m_iocfdc(*this , "iocfdc"),
m_flop0(*this, "iocfdc:0"),
m_iocpio(*this , "iocpio"),
m_kbcpu(*this , "kbcpu"),
m_palette(*this , "palette"),
m_gfxdecode(*this, "gfxdecode"),
m_centronics(*this , "centronics"),
m_io_key0(*this , "KEY0"),
m_io_key1(*this , "KEY1"),
m_io_key2(*this , "KEY2"),
m_io_key3(*this , "KEY3"),
m_io_key4(*this , "KEY4"),
m_io_key5(*this , "KEY5"),
m_io_key6(*this , "KEY6"),
m_io_key7(*this , "KEY7"),
m_ioc_options(*this , "IOC_OPTS"),
m_device_status_byte(0xff)
{
}
READ8_MEMBER(imds2_state::ipc_mem_read)
{
if (imds2_in_ipc_rom(offset)) {
return m_ipc_rom[ (offset & 0x07ff) | ((offset & 0x1000) >> 1) ];
} else {
return m_ipc_ram[ offset ];
}
}
WRITE8_MEMBER(imds2_state::ipc_mem_write)
{
if (!imds2_in_ipc_rom(offset)) {
m_ipc_ram[ offset ] = data;
}
}
WRITE8_MEMBER(imds2_state::imds2_ipc_control_w)
{
// See A84, pg 28 of [1]
// b3 is ~(bit to be written)
// b2-b0 is ~(no. of bit to be written)
uint8_t mask = (1U << (~data & 0x07));
if (BIT(data , 3)) {
m_ipc_control &= ~mask;
} else {
m_ipc_control |= mask;
}
}
WRITE_LINE_MEMBER(imds2_state::imds2_ipc_intr)
{
m_ipccpu->set_input_line(I8085_INTR_LINE , (state != 0) && BIT(m_ipc_control , 2));
}
READ8_MEMBER(imds2_state::imds2_ipcsyspic_r)
{
return m_ipcsyspic->read(space , offset == 0);
}
READ8_MEMBER(imds2_state::imds2_ipclocpic_r)
{
return m_ipclocpic->read(space , offset == 0);
}
WRITE8_MEMBER(imds2_state::imds2_ipcsyspic_w)
{
m_ipcsyspic->write(space , offset == 0 , data);
}
WRITE8_MEMBER(imds2_state::imds2_ipclocpic_w)
{
m_ipclocpic->write(space , offset == 0 , data);
}
WRITE_LINE_MEMBER(imds2_state::imds2_baud_clk_0_w)
{
m_ipcusart0->write_txc(state);
m_ipcusart0->write_rxc(state);
}
WRITE_LINE_MEMBER(imds2_state::imds2_baud_clk_1_w)
{
m_ipcusart1->write_txc(state);
m_ipcusart1->write_rxc(state);
}
WRITE8_MEMBER(imds2_state::imds2_miscout_w)
{
m_miscout = data;
imds2_update_beeper();
// Send INTR to IPC
m_ipclocpic->ir6_w(BIT(m_miscout , 1));
}
READ8_MEMBER(imds2_state::imds2_miscin_r)
{
uint8_t res = m_ioc_options->read();
return res | ((m_beeper_timer == 0) << 2);
}
WRITE_LINE_MEMBER(imds2_state::imds2_beep_timer_w)
{
m_beeper_timer = state;
imds2_update_beeper();
}
WRITE8_MEMBER(imds2_state::imds2_start_timer_w)
{
// Trigger timer 2 of ioctimer
m_ioctimer->write_gate2(0);
m_ioctimer->write_gate2(1);
}
READ8_MEMBER(imds2_state::imds2_kb_read)
{
return m_kbcpu->upi41_master_r(space , (offset & 2) >> 1);
}
READ8_MEMBER(imds2_state::imds2_kb_port_p2_r)
{
if ((m_kb_p1 & 3) == 0) {
// Row selected
// Row number is encoded on bits P15..P12, they are "backwards" (P15 is LSB) and keyboard rows are encoded starting with value 2 on these bits (see A4, pg 56 of [1])
unsigned row = (m_kb_p1 >> 2) & 0x0f;
ioport_value data;
switch (row) {
case 4:
// Row 0
data = m_io_key0->read();
break;
case 12:
// Row 1
data = m_io_key1->read();
break;
case 2:
// Row 2
data = m_io_key2->read();
break;
case 10:
// Row 3
data = m_io_key3->read();
break;
case 6:
// Row 4
data = m_io_key4->read();
break;
case 14:
// Row 5
data = m_io_key5->read();
break;
case 1:
// Row 6
data = m_io_key6->read();
break;
case 9:
// Row 7
data = m_io_key7->read();
break;
default:
data = 0xff;
break;
}
return data & 0xff;
} else {
// No row selected
return 0xff;
}
}
WRITE8_MEMBER(imds2_state::imds2_kb_port_p1_w)
{
m_kb_p1 = data;
}
READ_LINE_MEMBER(imds2_state::imds2_kb_port_t0_r)
{
// T0 tied low
// It appears to be some kind of strapping option on kb hw
return 0;
}
READ_LINE_MEMBER(imds2_state::imds2_kb_port_t1_r)
{
// T1 tied low
// It appears to be some kind of strapping option on kb hw
return 0;
}
WRITE8_MEMBER(imds2_state::imds2_ioc_dbbout_w)
{
m_ioc_obf = ~data;
// Set/reset OBF flag (b0)
m_ipc_ioc_status = ((offset & 1) == 0) | (m_ipc_ioc_status & ~0x01);
}
WRITE8_MEMBER(imds2_state::imds2_ioc_f0_w)
{
// Set/reset F0 flag (b2)
m_ipc_ioc_status = ((offset & 1) << 2) | (m_ipc_ioc_status & ~0x04);
}
WRITE8_MEMBER(imds2_state::imds2_ioc_set_f1_w)
{
// Set F1 flag (b3)
m_ipc_ioc_status |= 0x08;
}
WRITE8_MEMBER(imds2_state::imds2_ioc_reset_f1_w)
{
// Reset F1 flag (b3)
m_ipc_ioc_status &= ~0x08;
}
READ8_MEMBER(imds2_state::imds2_ioc_status_r)
{
return ~m_ipc_ioc_status;
}
READ8_MEMBER(imds2_state::imds2_ioc_dbbin_r)
{
// Reset IBF flag (b1)
m_ipc_ioc_status &= ~0x02;
return ~m_ioc_ibf;
}
READ8_MEMBER(imds2_state::imds2_ipc_dbbout_r)
{
// Reset OBF flag (b0)
m_ipc_ioc_status &= ~0x01;
return m_ioc_obf;
}
READ8_MEMBER(imds2_state::imds2_ipc_status_r)
{
return m_ipc_ioc_status;
}
WRITE8_MEMBER(imds2_state::imds2_ipc_dbbin_data_w)
{
// Set IBF flag (b1)
m_ipc_ioc_status |= 0x02;
// Reset F1 flag (b3)
m_ipc_ioc_status &= ~0x08;
m_ioc_ibf = data;
}
WRITE8_MEMBER(imds2_state::imds2_ipc_dbbin_cmd_w)
{
// Set IBF flag (b1)
m_ipc_ioc_status |= 0x02;
// Set F1 flag (b3)
m_ipc_ioc_status |= 0x08;
m_ioc_ibf = data;
}
WRITE_LINE_MEMBER(imds2_state::imds2_hrq_w)
{
// Should be propagated to HOLD input of IOC CPU
m_iocdma->hlda_w(state);
}
READ8_MEMBER(imds2_state::imds2_ioc_mem_r)
{
address_space& prog_space = m_ioccpu->space(AS_PROGRAM);
return prog_space.read_byte(offset);
}
WRITE8_MEMBER(imds2_state::imds2_ioc_mem_w)
{
address_space& prog_space = m_ioccpu->space(AS_PROGRAM);
return prog_space.write_byte(offset , data);
}
READ8_MEMBER(imds2_state::imds2_pio_port_p1_r)
{
// If STATUS ENABLE/ == 0 return inverted device status byte, else return 0xff
// STATUS ENABLE/ == 0 when P23-P20 == 12 & P24 == 0 & P25 = 1 & P26 = 1
if ((m_pio_port2 & 0x7f) == 0x6c) {
return ~m_device_status_byte;
} else {
return 0xff;
}
}
WRITE8_MEMBER(imds2_state::imds2_pio_port_p1_w)
{
m_pio_port1 = data;
imds2_update_printer();
}
READ8_MEMBER(imds2_state::imds2_pio_port_p2_r)
{
return m_pio_port2;
}
WRITE8_MEMBER(imds2_state::imds2_pio_port_p2_w)
{
m_pio_port2 = data;
imds2_update_printer();
// Send INTR to IPC
m_ipclocpic->ir5_w(BIT(data , 7));
}
WRITE_LINE_MEMBER(imds2_state::imds2_pio_lpt_ack_w)
{
if (state) {
m_device_status_byte |= 0x20;
} else {
m_device_status_byte &= ~0x20;
}
}
WRITE_LINE_MEMBER(imds2_state::imds2_pio_lpt_busy_w)
{
// Busy is active high in centronics_device whereas it's active low in MDS
if (!state) {
m_device_status_byte |= 0x10;
} else {
m_device_status_byte &= ~0x10;
}
}
WRITE_LINE_MEMBER(imds2_state::imds2_pio_lpt_select_w)
{
if (state) {
m_device_status_byte |= 0x40;
} else {
m_device_status_byte &= ~0x40;
}
}
I8275_DRAW_CHARACTER_MEMBER(imds2_state::crtc_display_pixels)
{
unsigned i;
const rgb_t *palette = m_palette->palette()->entry_list_raw();
uint8_t chargen_byte = m_chargen[ (linecount & 7) | ((unsigned)charcode << 3) ];
uint16_t pixels;
if (lten) {
pixels = ~0;
} else if (vsp != 0 || (linecount & 8) != 0) {
pixels = 0;
} else {
// See [2], pg 58 for the very peculiar way of generating character images
// Here each half-pixel is translated into a full pixel
uint16_t exp_pix_l;
uint16_t exp_pix_r;
exp_pix_l = (uint16_t)chargen_byte;
exp_pix_l = ((exp_pix_l & 0x80) << 5) |
((exp_pix_l & 0x40) << 4) |
((exp_pix_l & 0x20) << 3) |
((exp_pix_l & 0x10) << 2) |
((exp_pix_l & 0x08) << 1) |
(exp_pix_l & 0x04);
exp_pix_l |= (exp_pix_l << 1);
exp_pix_r = exp_pix_l;
// Layout of exp_pix_l/r:
// Bit # : F E D C B A 9 8 7 6 5 4 3 2 1 0
// Bit of chargen_byte: 0 0 b7 b7 b6 b6 b5 b5 b4 b4 b3 b3 b2 b2 0 0
if ((chargen_byte & 2) == 0) {
exp_pix_l >>= 1;
}
exp_pix_l &= 0x3fc0;
if ((chargen_byte & 1) == 0) {
exp_pix_r >>= 1;
}
exp_pix_r &= 0x003e;
pixels = exp_pix_l | exp_pix_r;
}
if (rvv) {
pixels = ~pixels;
}
for (i = 0; i < 14; i++) {
bitmap.pix32(y, x + i) = palette[ (pixels & (1U << (13 - i))) != 0 ];
}
}
void imds2_state::driver_start()
{
// Allocate 64k for IPC RAM
m_ipc_ram.resize(0x10000);
memory_region *ipcrom = memregion("ipcrom");
if (ipcrom == nullptr) {
fatalerror("Unable to find IPC ROM region\n");
} else {
m_ipc_rom = ipcrom->base();
}
}
void imds2_state::machine_start()
{
m_iocfdc->set_ready_line_connected(true);
}
void imds2_state::video_start()
{
m_chargen = memregion("gfx1")->base();
}
void imds2_state::machine_reset()
{
m_ipc_control = 0x00;
m_ipc_ioc_status = 0x0f;
m_iocfdc->set_rate(500000); // The IMD images show a rate of 500kbps
}
bool imds2_state::imds2_in_ipc_rom(offs_t offset) const
{
offs_t masked_offset = offset & 0xf800;
// Region 0000-07ff is in ROM when START_UP/ == 0 && SEL_BOOT/ == 0
if (masked_offset == 0x0000 && (m_ipc_control & 0x28) == 0) {
return true;
}
// Region e800-efff is in ROM when SEL_BOOT/ == 0
if (masked_offset == 0xe800 && (m_ipc_control & 0x08) == 0) {
return true;
}
// Region f800-ffff is always in ROM
if (masked_offset == 0xf800) {
return true;
}
return false;
}
void imds2_state::imds2_update_beeper(void)
{
m_iocbeep->set_state(m_beeper_timer == 0 && BIT(m_miscout , 0) == 0);
}
void imds2_state::imds2_update_printer(void)
{
// Data to printer is ~P1 when STATUS ENABLE/==1, else 0xff (assuming pull-ups on printer)
uint8_t printer_data;
if ((m_pio_port2 & 0x7f) == 0x6c) {
printer_data = 0xff;
} else {
printer_data = ~m_pio_port1;
}
m_centronics->write_data0(BIT(printer_data , 0));
m_centronics->write_data1(BIT(printer_data , 1));
m_centronics->write_data2(BIT(printer_data , 2));
m_centronics->write_data3(BIT(printer_data , 3));
m_centronics->write_data4(BIT(printer_data , 4));
m_centronics->write_data5(BIT(printer_data , 5));
m_centronics->write_data6(BIT(printer_data , 6));
m_centronics->write_data7(BIT(printer_data , 7));
// LPT DATA STROBE/ == 0 when P23-P20 == 9 & P24 == 0
m_centronics->write_strobe((m_pio_port2 & 0x1f) != 0x09);
}
static INPUT_PORTS_START(imds2)
// See [1], pg 56 for key matrix layout
// See [1], pg 57 for keyboard layout
PORT_START("KEY0")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR('@') PORT_CHAR('`') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(':') PORT_CHAR('*') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') // OK
PORT_START("KEY1")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_UNUSED)
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') // OK
PORT_START("KEY2")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('~') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(';') PORT_CHAR('+') // OK
PORT_START("KEY3")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') // OK
PORT_START("KEY4")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') // OK
PORT_START("KEY5")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') // OK
PORT_START("KEY6")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) // BS
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME)) // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('\\') PORT_CHAR('|') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_SHIFT_2) // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) // OK
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') // OK
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) // OK
PORT_START("KEY7")
PORT_BIT(0x01 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) // OK
PORT_BIT(0x02 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) // OK
PORT_BIT(0x04 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('_') PORT_CHAR('^') // OK
PORT_BIT(0x08 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // OK
PORT_BIT(0x10 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_LALT) PORT_CHAR(UCHAR_MAMEKEY(LALT)) // OK
PORT_BIT(0x20 , IP_ACTIVE_LOW , IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
PORT_BIT(0x40 , IP_ACTIVE_LOW , IPT_UNUSED)
PORT_BIT(0x80 , IP_ACTIVE_LOW , IPT_UNUSED)
// Options on IOC: see [1], pg 40
PORT_START("IOC_OPTS")
PORT_DIPNAME(0x80 , 0x80 , "Keyboard present")
PORT_DIPSETTING(0x80 , DEF_STR(Yes))
PORT_DIPSETTING(0x00 , DEF_STR(No))
PORT_DIPNAME(0x28 , 0x00 , "IOC mode")
PORT_DIPSETTING(0x00 , "On line")
PORT_DIPSETTING(0x08 , "Local")
PORT_DIPSETTING(0x20 , "Diagnostic")
PORT_DIPNAME(0x02 , 0x00 , "Floppy present")
PORT_DIPSETTING(0x02 , DEF_STR(Yes))
PORT_DIPSETTING(0x00 , DEF_STR(No))
PORT_DIPNAME(0x01 , 0x01 , "CRT frame frequency")
PORT_DIPSETTING(0x01 , "50 Hz")
PORT_DIPSETTING(0x00 , "60 Hz")
INPUT_PORTS_END
static GFXLAYOUT_RAW(imds2_charlayout , 8 , 8 , 8 , 64)
static GFXDECODE_START(gfx_imds2)
GFXDECODE_ENTRY("gfx1" , 0x0000 , imds2_charlayout , 0 , 1)
GFXDECODE_END
static void imds2_floppies(device_slot_interface &device)
{
device.option_add("8sssd", FLOPPY_8_SSSD);
}
MACHINE_CONFIG_START(imds2_state::imds2)
MCFG_DEVICE_ADD("ipccpu" , I8085A , IPC_XTAL_Y2 / 2) // 4 MHz
MCFG_DEVICE_PROGRAM_MAP(ipc_mem_map)
MCFG_DEVICE_IO_MAP(ipc_io_map)
MCFG_DEVICE_IRQ_ACKNOWLEDGE_DEVICE("ipcsyspic" , pic8259_device , inta_cb)
MCFG_QUANTUM_TIME(attotime::from_hz(100))
MCFG_DEVICE_ADD("ipcsyspic", PIC8259, 0)
MCFG_PIC8259_OUT_INT_CB(WRITELINE(*this, imds2_state, imds2_ipc_intr))
MCFG_PIC8259_IN_SP_CB(VCC)
MCFG_DEVICE_ADD("ipclocpic", PIC8259, 0)
MCFG_PIC8259_OUT_INT_CB(WRITELINE("ipcsyspic", pic8259_device, ir7_w))
MCFG_PIC8259_IN_SP_CB(VCC) // ???
MCFG_DEVICE_ADD("ipctimer" , PIT8253 , 0)
MCFG_PIT8253_CLK0(IPC_XTAL_Y1 / 16)
MCFG_PIT8253_CLK1(IPC_XTAL_Y1 / 16)
MCFG_PIT8253_CLK2(IPC_XTAL_Y1 / 16)
MCFG_PIT8253_OUT0_HANDLER(WRITELINE(*this, imds2_state , imds2_baud_clk_0_w))
MCFG_PIT8253_OUT1_HANDLER(WRITELINE(*this, imds2_state , imds2_baud_clk_1_w))
MCFG_PIT8253_OUT2_HANDLER(WRITELINE("ipclocpic" , pic8259_device , ir4_w))
MCFG_DEVICE_ADD("ipcusart0" , I8251 , 0)
MCFG_I8251_RTS_HANDLER(WRITELINE("ipcusart0" , i8251_device , write_cts))
MCFG_I8251_RXRDY_HANDLER(WRITELINE("ipclocpic" , pic8259_device , ir0_w))
MCFG_I8251_TXRDY_HANDLER(WRITELINE("ipclocpic" , pic8259_device , ir1_w))
MCFG_I8251_TXD_HANDLER(WRITELINE("serial0" , rs232_port_device , write_txd))
MCFG_DEVICE_ADD("ipcusart1" , I8251 , 0)
MCFG_I8251_RXRDY_HANDLER(WRITELINE("ipclocpic" , pic8259_device , ir2_w))
MCFG_I8251_TXRDY_HANDLER(WRITELINE("ipclocpic" , pic8259_device , ir3_w))
MCFG_I8251_TXD_HANDLER(WRITELINE("serial1" , rs232_port_device , write_txd))
MCFG_I8251_RTS_HANDLER(WRITELINE("serial1" , rs232_port_device , write_rts))
MCFG_I8251_DTR_HANDLER(WRITELINE("serial1" , rs232_port_device , write_dtr))
MCFG_DEVICE_ADD("serial0" , RS232_PORT, default_rs232_devices , nullptr)
MCFG_RS232_RXD_HANDLER(WRITELINE("ipcusart0" , i8251_device , write_rxd))
MCFG_RS232_DSR_HANDLER(WRITELINE("ipcusart0" , i8251_device , write_dsr))
MCFG_DEVICE_ADD("serial1" , RS232_PORT, default_rs232_devices , nullptr)
MCFG_RS232_RXD_HANDLER(WRITELINE("ipcusart1" , i8251_device , write_rxd))
MCFG_RS232_CTS_HANDLER(WRITELINE("ipcusart1" , i8251_device , write_cts))
MCFG_RS232_DSR_HANDLER(WRITELINE("ipcusart1" , i8251_device , write_dsr))
MCFG_DEVICE_ADD("ioccpu" , I8080A , IOC_XTAL_Y2 / 18) // 2.448 MHz but running at 50% (due to wait states & DMA usage of bus)
MCFG_DEVICE_PROGRAM_MAP(ioc_mem_map)
MCFG_DEVICE_IO_MAP(ioc_io_map)
MCFG_QUANTUM_TIME(attotime::from_hz(100))
// The IOC CRT hw is a bit complex, as the character clock (CCLK) to i8275
// is varied according to the part of the video frame being scanned and according to
// the 50/60 Hz option jumper (W8).
// The basic clock (BCLK) runs at 22.032 MHz.
// CCLK = BCLK / 14 when in the active region of video
// CCLK = BCLK / 12 when in horizontal retrace (HRTC=1)
// CCLK = BCLK / 10 when in horizontal retrace of "short scan lines" (50 Hz only)
//
// ***** 50 Hz timings *****
// 80 chars/row, 26 chars/h. retrace, 11 scan lines/row, 25 active rows, 3 vertical retrace rows
// Scan line: 80 chars * 14 BCLK + 26 chars * 12 BCLK = 1432 BCLK (64.996 usec)
// Scan row: 11 * scan lines = 15752 BCLK (714.960 usec)
// "Short" scan line: 80 chars * 14 BCLK + 26 chars * 10 BCLK = 1380 BCLK (62.636 usec)
// Frame: 28 scan rows (8 scan lines of 27th row are short): 27 * scan row + 3 * scan line + 8 * short scan line: 440640 BCLK (20 msec)
//
// ***** 60 Hz timings *****
// 80 chars/row, 20 chars/h. retrace, 10 scan lines/row, 25 active rows, 2 vertical retrace rows
// Scan line: 80 chars * 14 BCLK + 20 chars * 12 BCLK = 1360 BCLK (61.728 usec)
// Scan row: 10 * scan lines = 13600 BCLK (617.284 usec)
// Frame: 27 scan rows : 367200 BCLK (16.667 msec)
//
// Clock here is semi-bogus: it gives the correct frame frequency at 50 Hz (with the incorrect
// assumption that CCLK is fixed at BCLK / 14)
MCFG_DEVICE_ADD("ioccrtc" , I8275 , 22853600 / 14)
MCFG_I8275_CHARACTER_WIDTH(14)
MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(imds2_state , crtc_display_pixels)
MCFG_I8275_DRQ_CALLBACK(WRITELINE("iocdma" , i8257_device , dreq2_w))
MCFG_I8275_IRQ_CALLBACK(INPUTLINE("ioccpu" , I8085_INTR_LINE))
MCFG_VIDEO_SET_SCREEN("screen")
MCFG_SCREEN_ADD("screen" , RASTER)
MCFG_SCREEN_UPDATE_DEVICE("ioccrtc" , i8275_device , screen_update)
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_DEVICE_ADD("gfxdecode" , GFXDECODE, "palette" , gfx_imds2)
MCFG_PALETTE_ADD_MONOCHROME("palette")
SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD("iocbeep" , BEEP , IOC_BEEP_FREQ)
MCFG_SOUND_ROUTE(ALL_OUTPUTS , "mono" , 1.00)
MCFG_DEVICE_ADD("iocdma" , I8257 , IOC_XTAL_Y2 / 9)
MCFG_I8257_OUT_HRQ_CB(WRITELINE(*this, imds2_state, imds2_hrq_w))
MCFG_I8257_IN_MEMR_CB(READ8(*this, imds2_state , imds2_ioc_mem_r))
MCFG_I8257_OUT_MEMW_CB(WRITE8(*this, imds2_state , imds2_ioc_mem_w))
MCFG_I8257_IN_IOR_1_CB(READ8("iocfdc" , i8271_device , data_r))
MCFG_I8257_OUT_IOW_1_CB(WRITE8("iocfdc" , i8271_device , data_w))
MCFG_I8257_OUT_IOW_2_CB(WRITE8("ioccrtc" , i8275_device , dack_w))
MCFG_DEVICE_ADD("ioctimer" , PIT8253 , 0)
MCFG_PIT8253_CLK0(IOC_XTAL_Y1 / 4)
MCFG_PIT8253_OUT0_HANDLER(WRITELINE("ioctimer" , pit8253_device , write_clk2));
MCFG_PIT8253_OUT2_HANDLER(WRITELINE(*this, imds2_state , imds2_beep_timer_w));
MCFG_DEVICE_ADD("iocfdc" , I8271 , IOC_XTAL_Y1 / 2)
MCFG_I8271_DRQ_CALLBACK(WRITELINE("iocdma" , i8257_device , dreq1_w))
MCFG_FLOPPY_DRIVE_ADD("iocfdc:0", imds2_floppies, "8sssd", floppy_image_device::default_floppy_formats)
MCFG_SLOT_FIXED(true)
MCFG_DEVICE_ADD("iocpio" , I8041 , IOC_XTAL_Y3)
MCFG_MCS48_PORT_P1_IN_CB(READ8(*this, imds2_state, imds2_pio_port_p1_r))
MCFG_MCS48_PORT_P1_OUT_CB(WRITE8(*this, imds2_state, imds2_pio_port_p1_w))
MCFG_MCS48_PORT_P2_IN_CB(READ8(*this, imds2_state, imds2_pio_port_p2_r))
MCFG_MCS48_PORT_P2_OUT_CB(WRITE8(*this, imds2_state, imds2_pio_port_p2_w))
MCFG_QUANTUM_TIME(attotime::from_hz(100))
MCFG_DEVICE_ADD("kbcpu", I8741, XTAL(3'579'545)) /* 3.579545 MHz */
MCFG_MCS48_PORT_P1_OUT_CB(WRITE8(*this, imds2_state, imds2_kb_port_p1_w))
MCFG_MCS48_PORT_P2_IN_CB(READ8(*this, imds2_state, imds2_kb_port_p2_r))
MCFG_MCS48_PORT_T0_IN_CB(READLINE(*this, imds2_state, imds2_kb_port_t0_r))
MCFG_MCS48_PORT_T1_IN_CB(READLINE(*this, imds2_state, imds2_kb_port_t1_r))
MCFG_QUANTUM_TIME(attotime::from_hz(100))
MCFG_CENTRONICS_ADD("centronics", centronics_devices, "printer")
MCFG_CENTRONICS_ACK_HANDLER(WRITELINE(*this, imds2_state , imds2_pio_lpt_ack_w))
MCFG_CENTRONICS_BUSY_HANDLER(WRITELINE(*this, imds2_state , imds2_pio_lpt_busy_w))
MCFG_CENTRONICS_PERROR_HANDLER(WRITELINE(*this, imds2_state , imds2_pio_lpt_select_w))
MACHINE_CONFIG_END
ROM_START(imds2)
// ROM definition of IPC cpu (8085A)
ROM_REGION(0x1000 , "ipcrom" , 0)
ROM_DEFAULT_BIOS("mon13")
// 1x2732 Copyright 1979
ROM_SYSTEM_BIOS(0, "mon13", "Series II Monitor v1.3")
ROMX_LOAD("ipc13_a82.bin" , 0x0000 , 0x1000 , CRC(0889394f) SHA1(b7525baf1884a7d67402dea4b5566016a9861ef2), ROM_BIOS(1))
// 2x2716 Copyright 1978
ROM_SYSTEM_BIOS(1, "mon12", "Series II Monitor v1.2")
ROMX_LOAD("ipc12_a57.bin" , 0x0000 , 0x0800 , CRC(6496efaf) SHA1(1a9c0f1b19c1807803db3f1543f51349d7fd693a), ROM_BIOS(2))
ROMX_LOAD("ipc12_a48.bin" , 0x0800 , 0x0800 , CRC(258dc9a6) SHA1(3fde993aee06d9af5093d7a2d9a8cbd71fed0951), ROM_BIOS(2))
// 2x2716 Copyright 1977
ROM_SYSTEM_BIOS(2, "mon11", "Series II Monitor v1.1")
ROMX_LOAD("ipc11_a57.bin" , 0x0000 , 0x0800 , CRC(ffb7c036) SHA1(6f60cdfe20621c4b633c972adcb644a1c02eaa39), ROM_BIOS(3))
ROMX_LOAD("ipc11_a48.bin" , 0x0800 , 0x0800 , CRC(3696ff28) SHA1(38b435e10a81629430275aec051fb0a55ec1f6fd), ROM_BIOS(3))
// ROM definition of IOC cpu (8080A)
ROM_REGION(0x2000 , "ioccpu" , 0)
ROM_LOAD("ioc_a50.bin" , 0x0000 , 0x0800 , CRC(d9f926a1) SHA1(bd9d0f7458acc2806120a6dbaab9c48be315b060))
ROM_LOAD("ioc_a51.bin" , 0x0800 , 0x0800 , CRC(6aa2f86c) SHA1(d3a5314d86e3366545b4c97b29e323dfab383d5f))
ROM_LOAD("ioc_a52.bin" , 0x1000 , 0x0800 , CRC(b88a38d5) SHA1(934716a1daec852f4d1f846510f42408df0c9584))
ROM_LOAD("ioc_a53.bin" , 0x1800 , 0x0800 , CRC(c8df4bb9) SHA1(2dfb921e94ae7033a7182457b2f00657674d1b77))
// ROM definition of PIO controller (8041A)
// For the time being a specially developed PIO firmware is used until a dump of the original PIO is
// available.
ROM_REGION(0x400 , "iocpio" , 0)
ROM_LOAD("pio_a72.bin" , 0 , 0x400 , BAD_DUMP CRC(8c8e740b) SHA1(9b9333a9dc9585aa8f630721d13e551a5c87defc))
// ROM definition of keyboard controller (8741)
ROM_REGION(0x400 , "kbcpu" , 0)
ROM_LOAD("kbd511.bin" , 0 , 0x400 , CRC(ba7c4303) SHA1(19899af732d0ae1247bfc79979b1ee5f339ee5cf))
// ROM definition of character generator (2708, A19 on IOC)
ROM_REGION(0x400 , "gfx1" , 0)
ROM_LOAD ("ioc_a19.bin" , 0x0000 , 0x0400 , CRC(47487d0f) SHA1(0ed98f9f06622949ee3cc2ffc572fb9702db0f81))
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME */
COMP( 1979, imds2, 0, 0, imds2, imds2, imds2_state, empty_init, "Intel", "Intellec MDS-II" , 0)