diff options
Diffstat (limited to 'src/mess/drivers/k8915.c')
-rw-r--r-- | src/mess/drivers/k8915.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/mess/drivers/k8915.c b/src/mess/drivers/k8915.c new file mode 100644 index 00000000000..f628fcf6109 --- /dev/null +++ b/src/mess/drivers/k8915.c @@ -0,0 +1,189 @@ +/*************************************************************************** + + Robotron K8915 + + 30/08/2010 Skeleton driver + + When it says DIAGNOSTIC RAZ P, press enter. + +****************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "machine/keyboard.h" + +#define MACHINE_RESET_MEMBER(name) void name::machine_reset() +#define VIDEO_START_MEMBER(name) void name::video_start() +#define SCREEN_UPDATE16_MEMBER(name) UINT32 name::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) + +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_p_videoram(*this, "p_videoram"){ } + + required_device<cpu_device> m_maincpu; + DECLARE_READ8_MEMBER( k8915_52_r ); + DECLARE_READ8_MEMBER( k8915_53_r ); + DECLARE_WRITE8_MEMBER( k8915_a8_w ); + DECLARE_WRITE8_MEMBER( kbd_put ); + required_shared_ptr<UINT8> m_p_videoram; + UINT8 *m_p_chargen; + UINT8 m_framecnt; + UINT8 m_term_data; + virtual void machine_reset(); + virtual void video_start(); + UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + DECLARE_DRIVER_INIT(k8915); +}; + +READ8_MEMBER( k8915_state::k8915_52_r ) +{ +// get data from ascii keyboard + UINT8 ret = m_term_data; + m_term_data = 0; + return ret; +} + +READ8_MEMBER( k8915_state::k8915_53_r ) +{ +// keyboard status + return m_term_data ? 1 : 0; +} + +WRITE8_MEMBER( k8915_state::k8915_a8_w ) +{ +// seems to switch ram and rom around. + if (data == 0x87) + membank("boot")->set_entry(0); // ram at 0000 + else + membank("boot")->set_entry(1); // rom at 0000 +} + +static ADDRESS_MAP_START(k8915_mem, AS_PROGRAM, 8, k8915_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x0000, 0x0fff) AM_RAMBANK("boot") + AM_RANGE(0x1000, 0x17ff) AM_RAM AM_SHARE("p_videoram") + AM_RANGE(0x1800, 0xffff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START(k8915_io, AS_IO, 8, k8915_state) + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x52, 0x52) AM_READ(k8915_52_r) + AM_RANGE(0x53, 0x53) AM_READ(k8915_53_r) + AM_RANGE(0xa8, 0xa8) AM_WRITE(k8915_a8_w) +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( k8915 ) +INPUT_PORTS_END + +MACHINE_RESET_MEMBER(k8915_state) +{ + membank("boot")->set_entry(1); +} + +DRIVER_INIT_MEMBER(k8915_state,k8915) +{ + UINT8 *RAM = memregion("maincpu")->base(); + membank("boot")->configure_entries(0, 2, &RAM[0x0000], 0x10000); +} + +VIDEO_START_MEMBER( k8915_state ) +{ + m_p_chargen = memregion("chargen")->base(); +} + +SCREEN_UPDATE16_MEMBER( k8915_state ) +{ + UINT8 y,ra,chr,gfx; + UINT16 sy=0,ma=0,x; + + m_framecnt++; + + for (y = 0; y < 25; y++) + { + for (ra = 0; ra < 10; ra++) + { + UINT16 *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; +} + +WRITE8_MEMBER( k8915_state::kbd_put ) +{ + m_term_data = data; +} + +static ASCII_KEYBOARD_INTERFACE( keyboard_intf ) +{ + DEVCB_DRIVER_MEMBER(k8915_state, kbd_put) +}; + +static MACHINE_CONFIG_START( k8915, k8915_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", Z80, XTAL_16MHz / 4) + MCFG_CPU_PROGRAM_MAP(k8915_mem) + MCFG_CPU_IO_MAP(k8915_io) + + /* video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_REFRESH_RATE(60) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ + MCFG_SCREEN_UPDATE_DRIVER(k8915_state, screen_update) + MCFG_SCREEN_SIZE(640, 250) + MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249) + MCFG_PALETTE_LENGTH(2) + MCFG_PALETTE_INIT(monochrome_green) + + MCFG_ASCII_KEYBOARD_ADD(KEYBOARD_TAG, keyboard_intf) +MACHINE_CONFIG_END + + +/* ROM definition */ +ROM_START( k8915 ) + ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF ) + ROM_LOAD( "k8915.bin", 0x10000, 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 INIT COMPANY FULLNAME FLAGS */ +COMP( 1982, k8915, 0, 0, k8915, k8915, k8915_state, k8915, "Robotron", "K8915", GAME_NOT_WORKING | GAME_NO_SOUND) |