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plan80.cpp
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plan80.cpp
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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************
Plan-80
2009-12-06 Skeleton driver.
Summary of Monitor commands:
D - dump memory
F - fill memory
G - go (execute program at address)
I - in from a port and display
M - move?
O - out to a port
S - edit memory
ToDo:
- fix autorepeat on the keyboard
- Add missing devices
- Picture of unit shows graphics, possibly a PCG
****************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "sound/spkrdev.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
namespace {
class plan80_state : public driver_device
{
public:
plan80_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_vram(*this, "videoram")
, m_p_chargen(*this, "chargen")
, m_speaker(*this, "speaker")
{ }
void plan80(machine_config &config);
private:
u8 port04_r();
void port09_w(u8 data);
void port10_w(u8 data);
u32 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_kbd_row = 0U;
bool m_spk_pol = false;
virtual void machine_reset() override;
virtual void machine_start() override;
memory_passthrough_handler m_rom_shadow_tap;
required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_rom;
required_shared_ptr<u8> m_ram;
required_shared_ptr<u8> m_vram;
required_region_ptr<u8> m_p_chargen;
required_device<speaker_sound_device> m_speaker;
};
u8 plan80_state::port04_r()
{
u8 data = 0xff;
if (m_kbd_row == 0xfe)
data = ioport("LINE0")->read();
else
if (m_kbd_row == 0xfd)
data = ioport("LINE1")->read();
else
if (m_kbd_row == 0xfb)
data = ioport("LINE2")->read();
else
if (m_kbd_row == 0xf7)
data = ioport("LINE3")->read();
else
if (m_kbd_row == 0xef)
data = ioport("LINE4")->read();
return data;
}
void plan80_state::port09_w(u8 data)
{
m_kbd_row = data;
}
void plan80_state::port10_w(u8 data)
{
m_spk_pol ^= 1;
m_speaker->level_w(m_spk_pol);
}
void plan80_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0xefff).ram().share("mainram");
map(0xf000, 0xf7ff).ram().share("videoram");
map(0xf800, 0xffff).rom().region("maincpu", 0);
}
void plan80_state::io_map(address_map &map)
{
map.unmap_value_high();
map.global_mask(0xff);
map(0x04, 0x04).r(FUNC(plan80_state::port04_r));
map(0x09, 0x09).w(FUNC(plan80_state::port09_w));
map(0x10, 0x10).w(FUNC(plan80_state::port10_w));
}
/* Input ports */
static INPUT_PORTS_START( plan80 ) // Keyboard was worked out by trial & error;'F' keys produce foreign symbols
PORT_START("LINE0") /* FE */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F1)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F2)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A -") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('-')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q ! 1") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('!') PORT_CHAR('1')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F-shift") PORT_CODE(KEYCODE_RSHIFT)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P ?? 0") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('0')
PORT_START("LINE1") /* FD */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Numbers") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X /") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('/')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D =") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('=')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E # 3") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('#') PORT_CHAR('3')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M .") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('.')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K [") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('[')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I ( 8") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('(') PORT_CHAR('8')
PORT_START("LINE2") /* FB */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V ;") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR(';')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G _") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('_')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T % 5") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('%') PORT_CHAR('5')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B ?") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('?')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H <") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('<')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y & 6") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('&') PORT_CHAR('6')
PORT_START("LINE3") /* F7 */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C :") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR(':')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F ^") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('^')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R $ 4") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('$') PORT_CHAR('4')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N ,") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR(',')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J >") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('>')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U \' 7") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('\'') PORT_CHAR('7')
PORT_START("LINE4") /* EF */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F3)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F4)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z *") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('*')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S +") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('+')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W \" 2") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('\"') PORT_CHAR('2')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F5)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L ]") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR(']')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O ) 9") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR(')') PORT_CHAR('9')
INPUT_PORTS_END
void plan80_state::machine_reset()
{
address_space &program = m_maincpu->space(AS_PROGRAM);
program.install_rom(0x0000, 0x07ff, m_rom); // do it here for F3
m_rom_shadow_tap.remove();
m_rom_shadow_tap = program.install_read_tap(
0xf800, 0xffff,
"rom_shadow_r",
[this] (offs_t offset, u8 &data, u8 mem_mask)
{
if (!machine().side_effects_disabled())
{
// delete this tap
m_rom_shadow_tap.remove();
// reinstall RAM over the ROM shadow
m_maincpu->space(AS_PROGRAM).install_ram(0x0000, 0x07ff, m_ram);
}
},
&m_rom_shadow_tap);
}
void plan80_state::machine_start()
{
save_item(NAME(m_kbd_row));
save_item(NAME(m_spk_pol));
}
u32 plan80_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
u16 sy=0,ma=0;
for (u8 y = 0; y < 32; y++)
{
for (u8 ra = 0; ra < 8; ra++)
{
u16 *p = &bitmap.pix(sy++);
for (u16 x = ma; x < ma+48; x++)
{
u8 chr = m_vram[x];
u8 gfx = m_p_chargen[(chr << 3) | ra] ^ (BIT(chr, 7) ? 0xff : 0);
/* Display a scanline of a character */
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 1);
}
}
ma+=64;
}
return 0;
}
/* F4 Character Displayer */
static const gfx_layout charlayout =
{
8, 8, /* 8 x 8 characters */
256, /* 256 characters */
1, /* 1 bits per pixel */
{ 0 }, /* no bitplanes */
/* x offsets */
{ 0, 1, 2, 3, 4, 5, 6, 7 },
/* y offsets */
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8 /* every char takes 8 bytes */
};
static GFXDECODE_START( gfx_plan80 )
GFXDECODE_ENTRY( "chargen", 0x0000, charlayout, 0, 1 )
GFXDECODE_END
void plan80_state::plan80(machine_config &config)
{
/* basic machine hardware */
I8080(config, m_maincpu, 2048000);
m_maincpu->set_addrmap(AS_PROGRAM, &plan80_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &plan80_state::io_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_screen_update(FUNC(plan80_state::screen_update));
screen.set_size(48*6, 32*8);
screen.set_visarea(0, 48*6-1, 0, 32*8-1);
screen.set_palette("palette");
GFXDECODE(config, "gfxdecode", "palette", gfx_plan80);
PALETTE(config, "palette", palette_device::MONOCHROME);
/* sound hardware */
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50);
}
/* ROM definition */
ROM_START( plan80 )
ROM_REGION( 0x0800, "maincpu", 0 )
ROM_LOAD( "pl80mon.bin", 0x0000, 0x0800, CRC(433fb685) SHA1(43d53c35544d3a197ab71b6089328d104535cfa5) )
// This rom 2nd half is missing, so useless. It uses the videoram address range, so it might have been for some other system
//ROM_REGION( 0x10000, "spare", 0 )
//ROM_LOAD_OPTIONAL( "pl80mod.bin", 0xf000, 0x0800, CRC(6bdd7136) SHA1(721eab193c33c9330e0817616d3d2b601285fe50))
ROM_REGION( 0x0800, "chargen", 0 )
ROM_LOAD( "pl80gzn.bin", 0x0000, 0x0800, CRC(b4ddbdb6) SHA1(31bf9cf0f2ed53f48dda29ea830f74cea7b9b9b2) )
ROM_END
} // anonymous namespace
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1988, plan80, 0, 0, plan80, plan80, plan80_state, empty_init, "Tesla Eltos", "Plan-80", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )