// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************
Robotron K8915
2010-08-30
When it says DIAGNOSTIC RAZ P, press enter.
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/z80ctc.h"
#include "machine/z80sio.h"
#include "bus/rs232/rs232.h"
#include "emupal.h"
#include "screen.h"
class k8915_state : public driver_device
{
public:
k8915_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_rom(*this, "maincpu")
, m_ram(*this, "mainram")
, m_bank1(*this, "bank1")
, m_p_videoram(*this, "videoram")
, m_p_chargen(*this, "chargen")
{ }
void k8915(machine_config &config);
private:
void k8915_a8_w(u8 data);
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void io_map(address_map &map);
void mem_map(address_map &map);
u8 m_framecnt;
void machine_start() override;
void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_rom;
required_shared_ptr<u8> m_ram;
required_memory_bank m_bank1;
required_shared_ptr<u8> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
};
void k8915_state::k8915_a8_w(u8 data)
{
// seems to switch ram and rom around.
m_bank1->set_entry((data == 0x87) ? 0 : 1);
}
void k8915_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x0fff).ram().share("mainram").bankr("bank1");
map(0x1000, 0x17ff).ram().share("videoram");
map(0x1800, 0xffff).ram();
}
void k8915_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x50, 0x53).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w));
map(0x58, 0x5b).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
map(0xa8, 0xa8).w(FUNC(k8915_state::k8915_a8_w));
}
/* Input ports */
static INPUT_PORTS_START( k8915 )
INPUT_PORTS_END
void k8915_state::machine_reset()
{
m_bank1->set_entry(1);
}
void k8915_state::machine_start()
{
m_bank1->configure_entry(0, m_ram);
m_bank1->configure_entry(1, m_rom);
save_item(NAME(m_framecnt));
}
u32 k8915_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
u8 y,ra,chr,gfx;
u16 sy=0,ma=0,x;
m_framecnt++;
for (y = 0; y < 25; y++)
{
for (ra = 0; ra < 10; ra++)
{
u16 *p = &bitmap.pix16(sy++);
for (x = ma; x < ma + 80; x++)
{
gfx = 0;
if (ra < 9)
{
chr = m_p_videoram[x];
/* Take care of flashing characters */
if ((chr & 0x80) && (m_framecnt & 0x08))
chr = 0x20;
chr &= 0x7f;
gfx = m_p_chargen[(chr<<4) | ra ];
}
/* Display a scanline of a character */
*p++ = BIT(gfx, 7);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 1);
*p++ = BIT(gfx, 0);
}
}
ma+=80;
}
return 0;
}
void k8915_state::k8915(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, XTAL(4'915'200) / 2);
m_maincpu->set_addrmap(AS_PROGRAM, &k8915_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &k8915_state::io_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_screen_update(FUNC(k8915_state::screen_update));
screen.set_size(640, 250);
screen.set_visarea(0, 639, 0, 249);
screen.set_palette("palette");
PALETTE(config, "palette", palette_device::MONOCHROME);
z80ctc_device& ctc(Z80CTC(config, "ctc", XTAL(4'915'200) / 2));
ctc.set_clk<2>(XTAL(4'915'200) / 2);
ctc.zc_callback<2>().set("sio", FUNC(z80sio_device::rxtxcb_w));
z80sio_device& sio(Z80SIO(config, "sio", XTAL(4'915'200) / 2));
sio.out_txdb_callback().set("rs232", FUNC(rs232_port_device::write_txd));
sio.out_dtrb_callback().set("rs232", FUNC(rs232_port_device::write_dtr));
sio.out_rtsb_callback().set("rs232", FUNC(rs232_port_device::write_rts));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "keyboard"));
rs232.rxd_handler().set("sio", FUNC(z80sio_device::rxb_w));
rs232.dcd_handler().set("sio", FUNC(z80sio_device::dcdb_w));
rs232.cts_handler().set("sio", FUNC(z80sio_device::ctsb_w));
}
/* ROM definition */
ROM_START( k8915 )
ROM_REGION( 0x1000, "maincpu", 0 )
ROM_LOAD( "k8915.bin", 0x0000, 0x1000, CRC(ca70385f) SHA1(a34c14adae9be821678aed7f9e33932ee1f3e61c))
/* character generator not dumped, using the one from 'c10' for now */
ROM_REGION( 0x2000, "chargen", 0 )
ROM_LOAD( "c10_char.bin", 0x0000, 0x2000, BAD_DUMP CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf))
ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1982, k8915, 0, 0, k8915, k8915, k8915_state, empty_init, "Robotron", "K8915", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )