// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
BOB85 driver by Miodrag Milanovic
2008-05-24 Preliminary driver.
2009-05-12 Skeleton driver.
2013-06-02 Working driver.
2019-07-14 Fixed cassette load - it loads correctly then says EEEE
Pasting:
0-F : as is
NEXT : ^
SMEM : -
GO : X
Test Paste:
-0600^11^22^33^44^55^66^77^88^99^--0600^
Now press up-arrow to confirm the data has been entered.
****************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/timer.h"
#include "imagedev/cassette.h"
#include "speaker.h"
#include "bob85.lh"
class bob85_state : public driver_device
{
public:
bob85_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_cass(*this, "cassette")
, m_line0(*this, "LINE0")
, m_line1(*this, "LINE1")
, m_line2(*this, "LINE2")
, m_digits(*this, "digit%u", 0U)
{ }
void bob85(machine_config &config);
private:
void bob85_io(address_map &map);
void bob85_mem(address_map &map);
DECLARE_READ8_MEMBER(bob85_keyboard_r);
DECLARE_WRITE8_MEMBER(bob85_7seg_w);
DECLARE_WRITE_LINE_MEMBER(sod_w);
DECLARE_READ_LINE_MEMBER(sid_r);
TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
uint8_t m_prev_key;
uint8_t m_count_key;
u16 m_casscnt;
bool m_cassold, m_cassbit;
virtual void machine_reset() override;
virtual void machine_start() override { m_digits.resolve(); }
required_device<i8085a_cpu_device> m_maincpu;
required_device<cassette_image_device> m_cass;
required_ioport m_line0;
required_ioport m_line1;
required_ioport m_line2;
output_finder<6> m_digits;
};
READ8_MEMBER(bob85_state::bob85_keyboard_r)
{
uint8_t retVal = 0;
uint8_t line0 = m_line0->read();
uint8_t line1 = m_line1->read();
uint8_t line2 = m_line2->read();
if (line0)
{
switch(line0)
{
case 0x01 : retVal = 0x80; break;
case 0x02 : retVal = 0x81; break;
case 0x04 : retVal = 0x82; break;
case 0x08 : retVal = 0x83; break;
case 0x10 : retVal = 0x84; break;
case 0x20 : retVal = 0x85; break;
case 0x40 : retVal = 0x86; break;
case 0x80 : retVal = 0x87; break;
default : break;
}
}
if (line1)
{
switch(line1)
{
case 0x01 : retVal = 0x88; break;
case 0x02 : retVal = 0x89; break;
case 0x04 : retVal = 0x8A; break;
case 0x08 : retVal = 0x8B; break;
case 0x10 : retVal = 0x8C; break;
case 0x20 : retVal = 0x8D; break;
case 0x40 : retVal = 0x8E; break;
case 0x80 : retVal = 0x8F; break;
default : break;
}
}
if (line2)
{
switch(line2)
{
case 0x01 : retVal |= 0x90; break;
case 0x02 : retVal |= 0xA0; break;
case 0x04 : retVal |= 0xB0; break;
case 0x08 : retVal |= 0xC0; break;
case 0x10 : retVal |= 0xD0; break;
case 0x20 : retVal |= 0xE0; break;
default : break;
}
}
if (retVal != m_prev_key)
{
m_prev_key = retVal;
m_count_key = 0;
return retVal;
}
else
{
if (m_count_key <1)
{
m_count_key++;
return retVal;
}
else
return 0;
}
}
WRITE8_MEMBER(bob85_state::bob85_7seg_w)
{
m_digits[offset] = bitswap<8>( data,3,2,1,0,7,6,5,4 );
}
void bob85_state::bob85_mem(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x02ff).rom();
map(0x0600, 0x09ff).ram();
}
void bob85_state::bob85_io(address_map &map)
{
map.unmap_value_high();
map(0x0a, 0x0a).r(FUNC(bob85_state::bob85_keyboard_r));
map(0x0a, 0x0f).w(FUNC(bob85_state::bob85_7seg_w));
}
/* Input ports */
static INPUT_PORTS_START( bob85 )
PORT_START("LINE0")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_START("LINE1")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_START("LINE2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SMEM") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("REC") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("VEK1") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("VEK2") PORT_CODE(KEYCODE_W) PORT_CHAR('W')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("NEXT") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT(0xC0, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END
void bob85_state::machine_reset()
{
}
TIMER_DEVICE_CALLBACK_MEMBER( bob85_state::kansas_r )
{
/* cassette - turn pulses into a bit */
bool cass_ws = (m_cass->input() > +0.04) ? 1 : 0;
m_casscnt++;
if (cass_ws != m_cassold)
{
m_cassold = cass_ws;
m_cassbit = (m_casscnt < 12) ? 1 : 0;
m_casscnt = 0;
}
else
if (m_casscnt > 32)
{
m_casscnt = 32;
m_cassbit = 0;
}
}
WRITE_LINE_MEMBER( bob85_state::sod_w )
{
m_cass->output(state ? +1.0 : -1.0);
}
READ_LINE_MEMBER( bob85_state::sid_r )
{
return m_cassbit;
}
void bob85_state::bob85(machine_config &config)
{
/* basic machine hardware */
I8085A(config, m_maincpu, XTAL(5'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &bob85_state::bob85_mem);
m_maincpu->set_addrmap(AS_IO, &bob85_state::bob85_io);
m_maincpu->in_sid_func().set(FUNC(bob85_state::sid_r));
m_maincpu->out_sod_func().set(FUNC(bob85_state::sod_w));
/* video hardware */
config.set_default_layout(layout_bob85);
SPEAKER(config, "mono").front_center();
// devices
CASSETTE(config, m_cass).set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
TIMER(config, "kansas_r").configure_periodic(FUNC(bob85_state::kansas_r), attotime::from_hz(40000));
}
/* ROM definition */
ROM_START( bob85 )
ROM_REGION( 0x600, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD( "bob85.rom", 0x0000, 0x0300, BAD_DUMP CRC(adde33a8) SHA1(00f26dd0c52005e7705e6cc9cb11a20e572682c6) ) // should be 6 separate 74S287's (256x4)
ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1984, bob85, 0, 0, bob85, bob85, bob85_state, empty_init, "Josef Kratochvil", "BOB-85", MACHINE_NO_SOUND_HW)