// license:MAME // copyright-holders:Robbbert /************************************************************************************************************ Telcon Zorba 2013-08-25 Skeleton This was one of the last CP/M-based systems, already out of date when it was released. Because it doesn't use the standard Z80 peripherals, it uses a homebrew interrupt controller to make use of the Z80's IM2. The keyboard is an intelligent serial device like the Kaypro's keyboard. They even have the same plug, and might be swappable. Need a schematic. ToDo: - Add interrupt vector hardware and masking feature - Connect devices to the above hardware - Fix the unholy mess surrounding the dma and crtc - Connect up the PIT - Replace the ascii keyboard with the real one, if possible - Probably lots of other things Note: because the 8275 isn't working, a generic video handler is being used at this time. *************************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "cpu/m6805/m6805.h" #include "machine/i8251.h" #include "machine/6821pia.h" #include "machine/z80dma.h" #include "machine/pit8253.h" #include "video/i8275x.h" #include "sound/beep.h" #include "machine/keyboard.h" #include "machine/wd_fdc.h" #define KEYBOARD_TAG "keyboard" class zorba_state : public driver_device { public: zorba_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_p_videoram(*this, "videoram"), m_maincpu(*this, "maincpu"), m_beep(*this, "beeper"), m_dma(*this, "dma"), m_u0(*this, "uart0"), m_u1(*this, "uart1"), m_u2(*this, "uart2"), m_pia0(*this, "pia0"), m_pia1(*this, "pia1"), m_crtc(*this, "crtc"), m_fdc (*this, "fdc"), m_floppy0(*this, "fdc:0"), m_floppy1(*this, "fdc:1") { } public: const UINT8 *m_p_chargen; UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); DECLARE_PALETTE_INIT(zorba); required_shared_ptr m_p_videoram; DECLARE_DRIVER_INIT(zorba); DECLARE_MACHINE_RESET(zorba); DECLARE_READ8_MEMBER(ram_r); DECLARE_WRITE8_MEMBER(ram_w); DECLARE_READ8_MEMBER(rom_r); DECLARE_WRITE8_MEMBER(rom_w); DECLARE_WRITE8_MEMBER(intmask_w); DECLARE_WRITE_LINE_MEMBER(busreq_w); DECLARE_READ8_MEMBER(memory_read_byte); DECLARE_WRITE8_MEMBER(memory_write_byte); DECLARE_READ8_MEMBER(io_read_byte); DECLARE_WRITE8_MEMBER(io_write_byte); DECLARE_WRITE8_MEMBER(pia0_porta_w); DECLARE_WRITE8_MEMBER(kbd_put); DECLARE_READ8_MEMBER(keyboard_r); private: UINT8 m_term_data; required_device m_maincpu; required_device m_beep; required_device m_dma; required_device m_u0; required_device m_u1; required_device m_u2; required_device m_pia0; required_device m_pia1; required_device m_crtc; required_device m_fdc; required_device m_floppy0; required_device m_floppy1; }; static ADDRESS_MAP_START( zorba_mem, AS_PROGRAM, 8, zorba_state ) AM_RANGE( 0x0000, 0x3fff ) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0") AM_RANGE( 0x4000, 0xf6ff ) AM_RAM AM_RANGE( 0xf700, 0xffff ) AM_RAM AM_SHARE("videoram") ADDRESS_MAP_END static ADDRESS_MAP_START( zorba_kbdmem, AS_PROGRAM, 8, zorba_state ) ADDRESS_MAP_GLOBAL_MASK(0x7ff) AM_RANGE( 0x000, 0x07f ) AM_RAM // internal RAM AM_RANGE( 0x080, 0x7ff ) AM_ROM // internal EPROM ADDRESS_MAP_END static ADDRESS_MAP_START( zorba_io, AS_IO, 8, zorba_state ) ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("pit", pit8254_device, read, write) AM_RANGE(0x04, 0x04) AM_READWRITE(rom_r,rom_w) AM_RANGE(0x05, 0x05) AM_READWRITE(ram_r,ram_w) AM_RANGE(0x10, 0x11) AM_DEVREADWRITE("crtc", i8275x_device, read, write) AM_RANGE(0x20, 0x20) AM_DEVREADWRITE("uart0", i8251_device, data_r, data_w) AM_RANGE(0x21, 0x21) AM_DEVREADWRITE("uart0", i8251_device, status_r, control_w) AM_RANGE(0x22, 0x22) AM_DEVREADWRITE("uart1", i8251_device, data_r, data_w) AM_RANGE(0x23, 0x23) AM_DEVREADWRITE("uart1", i8251_device, status_r, control_w) //AM_RANGE(0x24, 0x24) AM_DEVREADWRITE("uart2", i8251_device, data_r, data_w) //AM_RANGE(0x25, 0x25) AM_DEVREADWRITE("uart2", i8251_device, status_r, control_w) AM_RANGE(0x24, 0x25) AM_READ(keyboard_r) AM_WRITENOP AM_RANGE(0x26, 0x26) AM_WRITE(intmask_w) AM_RANGE(0x30, 0x30) AM_DEVREADWRITE_LEGACY("dma", z80dma_r, z80dma_w) AM_RANGE(0x40, 0x43) AM_DEVREADWRITE("fdc", fd1793_t, read, write) AM_RANGE(0x50, 0x53) AM_DEVREADWRITE("pia0", pia6821_device, read, write) AM_RANGE(0x60, 0x63) AM_DEVREADWRITE("pia1", pia6821_device, read, write) ADDRESS_MAP_END READ8_MEMBER( zorba_state::ram_r ) { membank("bankr0")->set_entry(0); return 0; } WRITE8_MEMBER( zorba_state::ram_w ) { membank("bankr0")->set_entry(0); } READ8_MEMBER( zorba_state::rom_r ) { membank("bankr0")->set_entry(1); return 0; } WRITE8_MEMBER( zorba_state::rom_w ) { membank("bankr0")->set_entry(1); } WRITE8_MEMBER( zorba_state::intmask_w ) { } static INPUT_PORTS_START( zorba ) INPUT_PORTS_END DRIVER_INIT_MEMBER( zorba_state, zorba ) { UINT8 *main = memregion("maincpu")->base(); membank("bankr0")->configure_entry(0, &main[0x0000]); membank("bankr0")->configure_entry(1, &main[0x10000]); membank("bankw0")->configure_entry(0, &main[0x0000]); } //------------------------------------------------- // Z80DMA_INTERFACE( dma_intf ) //------------------------------------------------- WRITE_LINE_MEMBER( zorba_state::busreq_w ) { // since our Z80 has no support for BUSACK, we assume it is granted immediately m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state); m_maincpu->set_input_line(INPUT_LINE_HALT, state); // do we need this? m_dma->bai_w(state); // tell dma that bus has been granted } READ8_MEMBER(zorba_state::memory_read_byte) { address_space& prog_space = m_maincpu->space(AS_PROGRAM); return prog_space.read_byte(offset); } WRITE8_MEMBER(zorba_state::memory_write_byte) { address_space& prog_space = m_maincpu->space(AS_PROGRAM); return prog_space.write_byte(offset, data); } READ8_MEMBER(zorba_state::io_read_byte) { address_space& prog_space = m_maincpu->space(AS_IO); return prog_space.read_byte(offset); } WRITE8_MEMBER(zorba_state::io_write_byte) { address_space& prog_space = m_maincpu->space(AS_IO); if (offset == 0x10) { m_crtc->dack_w(space, 0, data); } else { return prog_space.write_byte(offset, data); } } // busack on cpu connects to bai pin static Z80DMA_INTERFACE( dma_intf ) { //DEVCB_CPU_INPUT_LINE("maincpu", INPUT_LINE_HALT), //busreq - connects to busreq on cpu DEVCB_DRIVER_LINE_MEMBER(zorba_state, busreq_w), //busreq - connects to busreq on cpu DEVCB_CPU_INPUT_LINE("maincpu", INPUT_LINE_IRQ0), //int/pulse - connects to IRQ0 on cpu DEVCB_NULL, //ba0 - not connected DEVCB_DRIVER_MEMBER(zorba_state, memory_read_byte), DEVCB_DRIVER_MEMBER(zorba_state, memory_write_byte), DEVCB_DRIVER_MEMBER(zorba_state, io_read_byte), DEVCB_DRIVER_MEMBER(zorba_state, io_write_byte), }; static SLOT_INTERFACE_START( zorba_floppies ) SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) SLOT_INTERFACE_END WRITE8_MEMBER( zorba_state::pia0_porta_w ) { m_beep->set_state(BIT(data, 7)); m_fdc->dden_w(BIT(data, 6)); floppy_image_device *floppy = NULL; if (!BIT(data, 0)) floppy = m_floppy0->get_device(); if (!BIT(data, 1)) floppy = m_floppy1->get_device(); m_fdc->set_floppy(floppy); if (floppy) { floppy->ss_w(!BIT(data, 5)); // might need inverting } m_floppy0->get_device()->mon_w(BIT(data, 4)); m_floppy1->get_device()->mon_w(BIT(data, 4)); } PALETTE_INIT_MEMBER( zorba_state, zorba ) { palette.set_pen_color(0, 0, 0, 0 ); /* Black */ palette.set_pen_color(1, 0, 255, 0 ); /* Full */ palette.set_pen_color(2, 0, 128, 0 ); /* Dimmed */ } static I8275_DISPLAY_PIXELS( zorba_update_chr ) { int i; zorba_state *state = device->machine().driver_data(); const rgb_t *palette = bitmap.palette()->entry_list_raw(); UINT8 gfx = state->m_p_chargen[(linecount & 15) + (charcode << 4)]; if (vsp) gfx = 0; if (lten) gfx = 0xff; if (rvv) gfx ^= 0xff; for(i=0;i<8;i++) bitmap.pix32(y, x + 7 - i) = palette[BIT(gfx, i) ? (hlgt ? 2 : 1) : 0]; } MACHINE_RESET_MEMBER( zorba_state, zorba ) { m_beep->set_frequency(800); m_p_chargen = memregion("chargen")->base(); membank("bankr0")->set_entry(1); // point at rom membank("bankw0")->set_entry(0); // always write to ram } UINT32 zorba_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { UINT8 y,ra,chr,gfx; UINT16 sy=0,ma=0,x; for (y = 0; y < 25; y++) { for (ra = 0; ra < 11; ra++) { UINT16 *p = &bitmap.pix16(sy++); for (x = 0; x < 80; x++) { gfx = 0; chr = m_p_videoram[x+ma]; if (chr) 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; } READ8_MEMBER( zorba_state::keyboard_r ) { if (offset) return (m_term_data) ? 0x87 : 0x85; UINT8 data = m_term_data; m_term_data = 0; return data; } WRITE8_MEMBER( zorba_state::kbd_put ) { m_term_data = data; } static ASCII_KEYBOARD_INTERFACE( keyboard_intf ) { DEVCB_DRIVER_MEMBER(zorba_state, kbd_put) }; static MACHINE_CONFIG_START( zorba, zorba_state ) // basic machine hardware MCFG_CPU_ADD("maincpu", Z80, XTAL_24MHz / 6) MCFG_CPU_PROGRAM_MAP(zorba_mem) MCFG_CPU_IO_MAP(zorba_io) MCFG_MACHINE_RESET_OVERRIDE(zorba_state, zorba) /* keyboard */ MCFG_CPU_ADD("kbdcpu", M68705, XTAL_3_579545MHz) // MC68705P3S (0x80 bytes ram, 0x780 bytes of rom) MCFG_CPU_PROGRAM_MAP(zorba_kbdmem) /* 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_DEVICE("crtc", i8275x_device, screen_update) // not working MCFG_SCREEN_UPDATE_DRIVER(zorba_state, screen_update) MCFG_SCREEN_SIZE(640, 276) MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 275) MCFG_PALETTE_ADD("palette", 3) MCFG_PALETTE_INIT_OWNER(zorba_state, zorba) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("beeper", BEEP, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00) /* Devices */ MCFG_Z80DMA_ADD("dma", XTAL_24MHz/6, dma_intf) MCFG_DEVICE_ADD("uart0", I8251, 0) // COM port MCFG_DEVICE_ADD("uart1", I8251, 0) // printer port MCFG_DEVICE_ADD("uart2", I8251, 0) // keyboard // port A - disk select etc, beeper // port B - parallel interface MCFG_DEVICE_ADD("pia0", PIA6821, 0) MCFG_PIA_WRITEPA_HANDLER(WRITE8(zorba_state, pia0_porta_w)) // IEEE488 interface MCFG_DEVICE_ADD("pia1", PIA6821, 0) MCFG_DEVICE_ADD("pit", PIT8254, 0) MCFG_PIT8253_CLK0(XTAL_24MHz / 3) /* Timer 0: ? */ MCFG_PIT8253_CLK1(XTAL_24MHz / 3) /* Timer 1: ? */ MCFG_PIT8253_CLK2(XTAL_24MHz / 3) /* Timer 2: ? */ MCFG_I8275_ADD("crtc", XTAL_14_31818MHz/7, 8, zorba_update_chr, DEVWRITELINE("dma", z80dma_device, rdy_w)) MCFG_I8275_IRQ_CALLBACK(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_FD1793x_ADD("fdc", XTAL_24MHz / 24) MCFG_FLOPPY_DRIVE_ADD("fdc:0", zorba_floppies, "525dd", floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD("fdc:1", zorba_floppies, "525dd", floppy_image_device::default_floppy_formats) /* Keyboard */ MCFG_ASCII_KEYBOARD_ADD(KEYBOARD_TAG, keyboard_intf) MACHINE_CONFIG_END ROM_START( zorba ) ROM_REGION( 0x14000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "780000.u47", 0x10000, 0x1000, CRC(6d58f2c5) SHA1(7763f08c801cd36e5a761c6dc9f30a50b3bc482d) ) ROM_REGION( 0x800, "kbdcpu", 0 ) ROM_LOAD( "8999-1 3-28-83", 0x080, 0x780, CRC(79fe6c0d) SHA1(4b6fca9379d5199d1347ad1187cbfdebfc4c73e7) ) ROM_REGION( 0x1000, "chargen", 0 ) ROM_LOAD( "773000.u5", 0x0000, 0x1000, CRC(d0a2f8fc) SHA1(29aee7ee657778c46e9800abd4955e6d4b33ef68) ) ROM_REGION( 0x60, "proms", 0 ) ROM_LOAD( "74ls288.u37", 0x0000, 0x0020, CRC(0a67edd6) SHA1(c1ece8978a3a061e0130d43907fa63a71e75e75d) ) ROM_LOAD( "74ls288.u38", 0x0020, 0x0020, CRC(5ec93ea7) SHA1(3a84c098474b05d5cbe1939a3e15f66d06470581) ) ROM_LOAD( "74ls288.u77", 0x0040, 0x0020, CRC(946e03b0) SHA1(24240bdd7bdf507a5b51628fb36ad1266fc53a28) ) ROM_END COMP( 1982, zorba, 0, 0, zorba, zorba, zorba_state, zorba, "Telcon Industries", "Zorba", GAME_NOT_WORKING )