// license:BSD-3-Clause // copyright-holders:Robbbert,AJR /************************************************************************************************************ Control Data Corporation CDC 721 Terminal (Viking) 2013-08-13 Skeleton *************************************************************************************************************/ #include "emu.h" #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "machine/bankdev.h" #include "machine/i8255.h" #include "machine/input_merger.h" #include "machine/ins8250.h" #include "machine/nvram.h" #include "machine/output_latch.h" #include "machine/z80ctc.h" #include "video/tms9927.h" #include "screen.h" class cdc721_state : public driver_device { public: cdc721_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_bank_16k(*this, {"block0", "block4", "block8", "blockc"}) , m_rom_chargen(*this, "chargen") , m_ram_chargen(*this, "chargen") , m_videoram(*this, "videoram") , m_nvram(*this, "nvram") { } void cdc721(machine_config &config); private: uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); DECLARE_PALETTE_INIT(cdc721); DECLARE_WRITE8_MEMBER(interrupt_mask_w); DECLARE_WRITE8_MEMBER(misc_w); DECLARE_WRITE8_MEMBER(lights_w); DECLARE_WRITE8_MEMBER(block_select_w); DECLARE_WRITE8_MEMBER(nvram_w); template DECLARE_WRITE_LINE_MEMBER(int_w); TIMER_CALLBACK_MEMBER(update_interrupts); IRQ_CALLBACK_MEMBER(restart_cb); template DECLARE_WRITE_LINE_MEMBER(foreign_char_bank_w); void io_map(address_map &map); void mem_map(address_map &map); void block0_map(address_map &map); void block4_map(address_map &map); void block8_map(address_map &map); void blockc_map(address_map &map); virtual void machine_start() override; virtual void machine_reset() override; u8 m_flashcnt; u8 m_foreign_char_bank; u8 m_pending_interrupts; u8 m_active_interrupts; u8 m_interrupt_mask; required_device m_maincpu; required_device_array m_bank_16k; required_region_ptr m_rom_chargen; required_shared_ptr m_ram_chargen; required_shared_ptr m_videoram; required_shared_ptr m_nvram; }; WRITE8_MEMBER(cdc721_state::interrupt_mask_w) { m_interrupt_mask = data ^ 0xff; machine().scheduler().synchronize(timer_expired_delegate(FUNC(cdc721_state::update_interrupts), this)); } template WRITE_LINE_MEMBER(cdc721_state::int_w) { if (BIT(m_pending_interrupts, Line) == state) return; if (state) m_pending_interrupts |= 0x01 << Line; else m_pending_interrupts &= ~(0x01 << Line); machine().scheduler().synchronize(timer_expired_delegate(FUNC(cdc721_state::update_interrupts), this)); } TIMER_CALLBACK_MEMBER(cdc721_state::update_interrupts) { m_active_interrupts = m_pending_interrupts & m_interrupt_mask; m_maincpu->set_input_line(INPUT_LINE_IRQ0, m_active_interrupts != 0 ? ASSERT_LINE : CLEAR_LINE); } IRQ_CALLBACK_MEMBER(cdc721_state::restart_cb) { // IM 2 vector is produced through a SN74LS148N priority encoder plus some buffers and a latch // The CTC vector is not even fetched u8 vector = 0x00; u8 active = m_active_interrupts; while (vector < 0x0e && !BIT(active, 0)) { active >>= 1; vector += 0x02; } return vector; } WRITE8_MEMBER(cdc721_state::misc_w) { // 7: Stop Refresh Operation // 6: Enable RAM Char Gen // 5: Enable Block Cursor // 4: Reverse Video // 3: 132/80 // 2: Enable Blink // 1: Enable Blinking Cursor // 0: Alarm logerror("%s: %d-column display selected\n", machine().describe_context(), BIT(data, 3) ? 132 : 80); } WRITE8_MEMBER(cdc721_state::block_select_w) { logerror("%s: Bank select = %02X\n", machine().describe_context(), data); for (int b = 0; b < 4; b++) { m_bank_16k[b]->set_bank(data & 3); data >>= 2; } } WRITE8_MEMBER(cdc721_state::nvram_w) { m_nvram[offset] = data & 0x0f; } template WRITE_LINE_MEMBER(cdc721_state::foreign_char_bank_w) { if (state) m_foreign_char_bank |= 1 << Bit; else m_foreign_char_bank &= ~(1 << Bit); } void cdc721_state::mem_map(address_map &map) { map(0x0000, 0x3fff).rw("block0", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8)); map(0x4000, 0x7fff).rw("block4", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8)); map(0x8000, 0xbfff).rw("block8", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8)); map(0xc000, 0xffff).rw("blockc", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8)); } void cdc721_state::block0_map(address_map &map) { map(0x0000, 0x3fff).rom().region("resident", 0); map(0x8000, 0xbfff).ram(); } void cdc721_state::block4_map(address_map &map) { map(0x0000, 0x00ff).mirror(0x2700).ram().share("nvram").w(this, FUNC(cdc721_state::nvram_w)); map(0x0800, 0x0bff).mirror(0x2400).ram().share("chargen"); // 2x P2114AL-2 map(0x8000, 0xbfff).rom().region("16krom", 0); map(0xc000, 0xffff).ram(); } void cdc721_state::block8_map(address_map &map) { map(0x0000, 0x3fff).rom().region("rompack", 0); map(0x4000, 0x7fff).ram(); } void cdc721_state::blockc_map(address_map &map) { map(0x0000, 0x1fff).ram(); map(0x2000, 0x3fff).ram().share("videoram"); map(0x4000, 0x40ff).mirror(0x2700).ram().share("nvram").w(this, FUNC(cdc721_state::nvram_w)); map(0x4800, 0x4bff).mirror(0x2400).ram().share("chargen"); } void cdc721_state::io_map(address_map &map) { map.global_mask(0xff); map(0x00, 0x03).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0x10, 0x1f).rw("crtc", FUNC(crt5037_device::read), FUNC(crt5037_device::write)); map(0x20, 0x27).rw("kbduart", FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); map(0x30, 0x33).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x40, 0x47).rw("comuart", FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); map(0x50, 0x50).w("ledlatch", FUNC(output_latch_device::write)); map(0x70, 0x70).w(this, FUNC(cdc721_state::block_select_w)); map(0x80, 0x87).rw("pauart", FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); map(0x90, 0x97).rw("pbuart", FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); } static INPUT_PORTS_START( cdc721 ) INPUT_PORTS_END void cdc721_state::machine_reset() { for (auto &bank : m_bank_16k) bank->set_bank(0); } void cdc721_state::machine_start() { m_pending_interrupts = 0; m_active_interrupts = 0; m_interrupt_mask = 0; m_foreign_char_bank = 0; save_item(NAME(m_pending_interrupts)); save_item(NAME(m_active_interrupts)); save_item(NAME(m_interrupt_mask)); save_item(NAME(m_foreign_char_bank)); } /* F4 Character Displayer */ static const gfx_layout cdc721_charlayout = { 8, 16, /* 8 x 16 characters */ 256, /* 256 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 7, 6, 5, 4, 3, 2, 1, 0 }, /* y offsets */ { 0*8, 0x100*8, 0x200*8, 0x300*8, 0x400*8, 0x500*8, 0x600*8, 0x700*8, 0x800*8, 0x900*8, 0xa00*8, 0xb00*8, 0xc00*8, 0xd00*8, 0xe00*8, 0xf00*8 }, 8 /* every char takes 16 x 1 bytes */ }; static GFXDECODE_START( gfx_cdc721 ) GFXDECODE_ENTRY( "chargen", 0x0000, cdc721_charlayout, 0, 1 ) GFXDECODE_END PALETTE_INIT_MEMBER( cdc721_state, cdc721 ) { 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 */ } uint32_t cdc721_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { uint8_t y,ra,chr,gfx,attr,pen; uint16_t sy=0,x; m_flashcnt++; for (y = 0; y < 30; y++) { uint16_t ma = m_videoram[y * 2] | m_videoram[y * 2 + 1] << 8; for (ra = 0; ra < 16; ra++) { uint16_t *p = &bitmap.pix16(sy++); for (x = 0; x < 160; x+=2) { pen = 1; chr = m_videoram[(x + ma) & 0x1fff]; attr = m_videoram[(x + ma + 1) & 0x1fff]; gfx = m_rom_chargen[chr | (ra << 8) ]; if (BIT(attr, 0)) // blank pen = 0; if (BIT(attr, 1) && (ra == 14)) // underline gfx = 0xff; if (BIT(attr, 4)) // dim pen = 2; if (BIT(attr, 2)) // rv gfx ^= 0xff; if (BIT(attr, 3) && BIT(m_flashcnt, 6)) // blink gfx = 0; /* Display a scanline of a character */ *p++ = BIT(gfx, 0) ? pen : 0; *p++ = BIT(gfx, 1) ? pen : 0; *p++ = BIT(gfx, 2) ? pen : 0; *p++ = BIT(gfx, 3) ? pen : 0; *p++ = BIT(gfx, 4) ? pen : 0; *p++ = BIT(gfx, 5) ? pen : 0; *p++ = BIT(gfx, 6) ? pen : 0; *p++ = BIT(gfx, 7) ? pen : 0; } } } return 0; } MACHINE_CONFIG_START(cdc721_state::cdc721) // basic machine hardware MCFG_DEVICE_ADD("maincpu", Z80, 6_MHz_XTAL) // Zilog Z8400B (Z80B) MCFG_DEVICE_PROGRAM_MAP(mem_map) MCFG_DEVICE_IO_MAP(io_map) MCFG_DEVICE_IRQ_ACKNOWLEDGE_DRIVER(cdc721_state, restart_cb) MCFG_DEVICE_ADD("block0", ADDRESS_MAP_BANK, 0) MCFG_DEVICE_ADDRESS_MAP(0, block0_map) MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE) MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8) MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000) MCFG_DEVICE_ADD("block4", ADDRESS_MAP_BANK, 0) MCFG_DEVICE_ADDRESS_MAP(0, block4_map) MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE) MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8) MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000) MCFG_DEVICE_ADD("block8", ADDRESS_MAP_BANK, 0) MCFG_DEVICE_ADDRESS_MAP(0, block8_map) MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE) MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8) MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000) MCFG_DEVICE_ADD("blockc", ADDRESS_MAP_BANK, 0) MCFG_DEVICE_ADDRESS_MAP(0, blockc_map) MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE) MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8) MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000) MCFG_NVRAM_ADD_0FILL("nvram") // MCM51L01C45 (256x4) + battery /* 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(cdc721_state, screen_update) MCFG_SCREEN_SIZE(640, 480) MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 479) MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD("palette", 3) MCFG_PALETTE_INIT_OWNER(cdc721_state, cdc721) MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_cdc721) MCFG_DEVICE_ADD("crtc", CRT5037, 12.936_MHz_XTAL / 8) MCFG_TMS9927_CHAR_WIDTH(8) MCFG_DEVICE_ADD("ctc", Z80CTC, 6_MHz_XTAL) // Zilog Z8430B (M1 pulled up) MCFG_Z80CTC_INTR_CB(WRITELINE(*this, cdc721_state, int_w<6>)) MCFG_Z80CTC_ZC1_CB(WRITELINE("ctc", z80ctc_device, trg2)) //MCFG_Z80CTC_ZC2_CB(WRITELINE("comuart", ins8250_device, rclk_w)) MCFG_DEVICE_ADD("ppi", I8255A, 0) MCFG_I8255_OUT_PORTB_CB(WRITE8(*this, cdc721_state, interrupt_mask_w)) MCFG_I8255_OUT_PORTC_CB(WRITE8(*this, cdc721_state, misc_w)) MCFG_DEVICE_ADD("ledlatch", OUTPUT_LATCH, 0) MCFG_OUTPUT_LATCH_BIT0_HANDLER(OUTPUT("error")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT1_HANDLER(OUTPUT("alert")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT2_HANDLER(OUTPUT("lock")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT3_HANDLER(OUTPUT("message")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT4_HANDLER(OUTPUT("prog1")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT5_HANDLER(OUTPUT("prog2")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT6_HANDLER(OUTPUT("prog3")) MCFG_DEVCB_INVERT MCFG_OUTPUT_LATCH_BIT7_HANDLER(OUTPUT("dsr")) MCFG_DEVCB_INVERT MCFG_DEVICE_ADD("comuart", INS8250, 1.8432_MHz_XTAL) MCFG_INS8250_OUT_INT_CB(WRITELINE(*this, cdc721_state, int_w<0>)) MCFG_INS8250_OUT_TX_CB(WRITELINE("comm", rs232_port_device, write_txd)) MCFG_INS8250_OUT_DTR_CB(WRITELINE("comm", rs232_port_device, write_dtr)) MCFG_INS8250_OUT_RTS_CB(WRITELINE("comm", rs232_port_device, write_rts)) MCFG_DEVICE_ADD("comm", RS232_PORT, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(WRITELINE("comuart", ins8250_device, rx_w)) MCFG_RS232_DSR_HANDLER(WRITELINE("comuart", ins8250_device, dsr_w)) MCFG_RS232_DCD_HANDLER(WRITELINE("comuart", ins8250_device, dcd_w)) MCFG_RS232_CTS_HANDLER(WRITELINE("comuart", ins8250_device, cts_w)) MCFG_RS232_RI_HANDLER(WRITELINE("comuart", ins8250_device, ri_w)) MCFG_DEVICE_ADD("kbduart", INS8250, 1.8432_MHz_XTAL) MCFG_INS8250_OUT_INT_CB(WRITELINE(*this, cdc721_state, int_w<5>)) MCFG_INS8250_OUT_DTR_CB(WRITELINE(*this, cdc721_state, foreign_char_bank_w<2>)) //MCFG_INS8250_OUT_RTS_CB(WRITELINE(*this, cdc721_state, alarm_high_low_w)) MCFG_INS8250_OUT_OUT1_CB(WRITELINE(*this, cdc721_state, foreign_char_bank_w<1>)) MCFG_INS8250_OUT_OUT2_CB(WRITELINE(*this, cdc721_state, foreign_char_bank_w<0>)) MCFG_DEVICE_ADD("pauart", INS8250, 1.8432_MHz_XTAL) MCFG_INS8250_OUT_INT_CB(WRITELINE("int2", input_merger_device, in_w<1>)) MCFG_INS8250_OUT_TX_CB(WRITELINE("cha", rs232_port_device, write_txd)) MCFG_INS8250_OUT_DTR_CB(WRITELINE("cha", rs232_port_device, write_dtr)) MCFG_INS8250_OUT_RTS_CB(WRITELINE("cha", rs232_port_device, write_rts)) MCFG_DEVICE_ADD("cha", RS232_PORT, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(WRITELINE("pauart", ins8250_device, rx_w)) MCFG_RS232_DSR_HANDLER(WRITELINE("pauart", ins8250_device, dsr_w)) MCFG_RS232_DCD_HANDLER(WRITELINE("pauart", ins8250_device, dcd_w)) MCFG_RS232_CTS_HANDLER(WRITELINE("pauart", ins8250_device, cts_w)) MCFG_RS232_RI_HANDLER(WRITELINE("pauart", ins8250_device, ri_w)) MCFG_DEVICE_ADD("pbuart", INS8250, 1.8432_MHz_XTAL) MCFG_INS8250_OUT_INT_CB(WRITELINE("int2", input_merger_device, in_w<0>)) MCFG_INS8250_OUT_TX_CB(WRITELINE("chb", rs232_port_device, write_txd)) MCFG_INS8250_OUT_DTR_CB(WRITELINE("chb", rs232_port_device, write_dtr)) MCFG_INS8250_OUT_RTS_CB(WRITELINE("chb", rs232_port_device, write_rts)) MCFG_DEVICE_ADD("chb", RS232_PORT, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(WRITELINE("pbuart", ins8250_device, rx_w)) MCFG_RS232_DSR_HANDLER(WRITELINE("pbuart", ins8250_device, dsr_w)) MCFG_RS232_DCD_HANDLER(WRITELINE("pbuart", ins8250_device, dcd_w)) MCFG_RS232_CTS_HANDLER(WRITELINE("pbuart", ins8250_device, cts_w)) MCFG_RS232_RI_HANDLER(WRITELINE("pbuart", ins8250_device, ri_w)) MCFG_INPUT_MERGER_ANY_HIGH("int2") // 74S05 (open collector) MCFG_INPUT_MERGER_OUTPUT_HANDLER(WRITELINE(*this, cdc721_state, int_w<2>)) MACHINE_CONFIG_END ROM_START( cdc721 ) ROM_REGION( 0x4000, "resident", 0 ) ROM_LOAD( "66315359", 0x0000, 0x2000, CRC(20ff3eb4) SHA1(5f15cb14893d75a46dc66d3042356bb054d632c2) ) ROM_LOAD( "66315361", 0x2000, 0x2000, CRC(21d59d09) SHA1(9c087537d68c600ddf1eb9b009cf458231c279f4) ) ROM_REGION( 0x4000, "16krom", 0 ) ROM_LOAD( "66315360", 0x0000, 0x1000, CRC(feaa0fc5) SHA1(f06196553a1f10c07b2f7e495823daf7ea26edee) ) //ROM_FILL(0x0157,1,0xe0) ROM_REGION( 0x4000, "rompack", ROMREGION_ERASE00 ) ROM_REGION( 0x2000, "chargen", 0 ) ROM_LOAD( "66315039", 0x0000, 0x1000, CRC(5c9aa968) SHA1(3ec7c5f25562579e6ed3fda7562428ff5e6b9550) ) ROM_LOAD( "66307828", 0x1000, 0x1000, CRC(ac97136f) SHA1(0d280e1aa4b9502bd390d260f83af19bf24905cd) ) // foreign character ROM ROM_END COMP( 1981, cdc721, 0, 0, cdc721, cdc721, cdc721_state, empty_init, "Control Data Corporation", "721 Display Terminal", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )