diff options
Diffstat (limited to 'src/mame/drivers/vixen.cpp')
-rw-r--r-- | src/mame/drivers/vixen.cpp | 780 |
1 files changed, 0 insertions, 780 deletions
diff --git a/src/mame/drivers/vixen.cpp b/src/mame/drivers/vixen.cpp deleted file mode 100644 index 8ef4f63ca30..00000000000 --- a/src/mame/drivers/vixen.cpp +++ /dev/null @@ -1,780 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Curt Coder, Robbbert -/* - -Osborne 4 Vixen - -Main PCB Layout ---------------- - -TODO - -Notes: - Relevant IC's shown. - - CPU - Zilog Z8400APS Z80A CPU - FDC - SMC FDC1797 - 8155 - Intel P8155H - ROM0 - - ROM1,2 - AMD AM2732-1DC 4Kx8 EPROM - CN1 - keyboard connector - CN2 - - CN3 - - CN4 - floppy connector - CN5 - power connector - CN6 - composite video connector - SW1 - reset switch - SW2 - - - -I/O PCB Layout --------------- - -TODO - -Notes: - Relevant IC's shown. - - 8155 - Intel P8155H - 8251 - AMD P8251A - CN1 - IEEE488 connector - CN2 - RS232 connector - CN3 - - -*/ - -/* - - TODO: - - - RS232 RI interrupt - - PCB layouts - -*/ - - -#include "emu.h" -#include "includes/vixen.h" - -#include "screen.h" -#include "softlist.h" -#include "speaker.h" - - -//************************************************************************** -// INTERRUPTS -//************************************************************************** - -void vixen_state::update_interrupt() -{ - int state = (m_cmd_d1 && m_fdint) || m_vsync;// || (!m_enb_srq_int && !m_srq) || (!m_enb_atn_int && !m_atn) || (!m_enb_xmt_int && m_txrdy) || (!m_enb_rcv_int && m_rxrdy); - - m_maincpu->set_input_line(INPUT_LINE_IRQ0, state ? ASSERT_LINE : CLEAR_LINE); -} - - -READ8_MEMBER( vixen_state::opram_r ) -{ - if (!machine().side_effects_disabled()) - membank("bank3")->set_entry(0); // read videoram - return m_program->read_byte(offset); -} - -READ8_MEMBER( vixen_state::oprom_r ) -{ - if (!machine().side_effects_disabled()) - membank("bank3")->set_entry(1); // read rom - return m_rom[offset]; -} - -READ8_MEMBER( vixen_state::status_r ) -{ - /* - - bit description - - 0 VSYNC enable - 1 FDINT enable - 2 VSYNC - 3 1 - 4 1 - 5 1 - 6 1 - 7 1 - - */ - - uint8_t data = 0xf8; - - // vertical sync interrupt enable - data |= m_cmd_d0; - - // floppy interrupt enable - data |= m_cmd_d1 << 1; - - // vertical sync - data |= m_vsync << 2; - - return data; -} - -WRITE8_MEMBER( vixen_state::cmd_w ) -{ - /* - - bit description - - 0 VSYNC enable - 1 FDINT enable - 2 - 3 - 4 - 5 - 6 - 7 - - */ - -// logerror("CMD %u\n", data); - - // vertical sync interrupt enable - m_cmd_d0 = BIT(data, 0); - - if (!m_cmd_d0) - { - // clear vertical sync - m_vsync = 0; - } - - // floppy interrupt enable - m_cmd_d1 = BIT(data, 1); - - update_interrupt(); -} - -READ8_MEMBER( vixen_state::ieee488_r ) -{ - /* - - bit description - - 0 ATN - 1 DAV - 2 NDAC - 3 NRFD - 4 EOI - 5 SRQ - 6 IFC - 7 REN - - */ - - uint8_t data = 0; - - /* attention */ - data |= m_ieee488->atn_r(); - - /* data valid */ - data |= m_ieee488->dav_r() << 1; - - /* data not accepted */ - data |= m_ieee488->ndac_r() << 2; - - /* not ready for data */ - data |= m_ieee488->nrfd_r() << 3; - - /* end or identify */ - data |= m_ieee488->eoi_r() << 4; - - /* service request */ - data |= m_ieee488->srq_r() << 5; - - /* interface clear */ - data |= m_ieee488->ifc_r() << 6; - - /* remote enable */ - data |= m_ieee488->ren_r() << 7; - - return data; -} - - -//------------------------------------------------- -// port3_r - serial status read -//------------------------------------------------- - -READ8_MEMBER( vixen_state::port3_r ) -{ - /* - - bit description - - 0 RI - 1 DCD - 2 1 - 3 1 - 4 1 - 5 1 - 6 1 - 7 1 - - */ - - uint8_t data = 0xfc; - - // ring indicator - data |= m_rs232->ri_r(); - - // data carrier detect - data |= m_rs232->dcd_r() << 1; - - return data; -} - - - -//************************************************************************** -// ADDRESS MAPS -//************************************************************************** - -// when M1 is inactive: read and write of data -void vixen_state::vixen_mem(address_map &map) -{ - map.unmap_value_high(); - map(0x0000, 0xefff).ram(); - map(0xf000, 0xffff).bankr("bank3").bankw("bank4").share("video_ram"); -} - -// when M1 is active: read opcodes -void vixen_state::bios_mem(address_map &map) -{ - map.unmap_value_high(); - map(0x0000, 0xefff).r(FUNC(vixen_state::opram_r)); - map(0xf000, 0xffff).r(FUNC(vixen_state::oprom_r)); -} - -void vixen_state::vixen_io(address_map &map) -{ - map.unmap_value_high(); - map.global_mask(0xff); - map(0x00, 0x03).rw(m_fdc, FUNC(fd1797_device::read), FUNC(fd1797_device::write)); - map(0x04, 0x04).mirror(0x03).rw(FUNC(vixen_state::status_r), FUNC(vixen_state::cmd_w)); - map(0x08, 0x08).mirror(0x01).rw(P8155H_TAG, FUNC(i8155_device::data_r), FUNC(i8155_device::data_w)); - map(0x0c, 0x0d).w(P8155H_TAG, FUNC(i8155_device::ale_w)); - map(0x10, 0x10).mirror(0x07).r(m_ieee488, FUNC(ieee488_device::dio_r)); - map(0x18, 0x18).mirror(0x07).r(FUNC(vixen_state::ieee488_r)); - map(0x20, 0x21).mirror(0x04).w(m_io_i8155, FUNC(i8155_device::ale_w)); - map(0x28, 0x28).mirror(0x05).rw(m_io_i8155, FUNC(i8155_device::data_r), FUNC(i8155_device::data_w)); - map(0x30, 0x31).mirror(0x06).rw(m_usart, FUNC(i8251_device::read), FUNC(i8251_device::write)); - map(0x38, 0x38).mirror(0x07).r(FUNC(vixen_state::port3_r)); -// AM_RANGE(0xf0, 0xff) Hard Disk? -} - - - -//************************************************************************** -// INPUT PORTS -//************************************************************************** - -INPUT_PORTS_START( vixen ) - PORT_START("KEY.0") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(0x1B) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TAB) PORT_CHAR(0x09) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(0x0D) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(0x27) PORT_CHAR(0x22) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']') - - PORT_START("KEY.1") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') - - PORT_START("KEY.2") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q') PORT_CHAR(0x11) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w') PORT_CHAR(0x17) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e') PORT_CHAR(0x05) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r') PORT_CHAR(0x12) - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t') PORT_CHAR(0x14) - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y') PORT_CHAR(0x19) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u') PORT_CHAR(0x15) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i') PORT_CHAR(0x09) - - PORT_START("KEY.3") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a') PORT_CHAR(0x01) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s') PORT_CHAR(0x13) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') PORT_CHAR(0x04) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f') PORT_CHAR(0x06) - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g') PORT_CHAR(0x07) - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h') PORT_CHAR(0x08) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') PORT_CHAR(0x0a) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k') PORT_CHAR(0x0b) - - PORT_START("KEY.4") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z') PORT_CHAR(0x1a) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') PORT_CHAR(0x18) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') PORT_CHAR(0x03) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v') PORT_CHAR(0x16) - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b') PORT_CHAR(0x02) - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n') PORT_CHAR(0x0e) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m') PORT_CHAR(0x0d) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') - - PORT_START("KEY.5") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("UP") PORT_CODE(KEYCODE_UP) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LEFT) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') PORT_CHAR(0x10) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o') PORT_CHAR(0x0f) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') - - PORT_START("KEY.6") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RIGHT") PORT_CODE(KEYCODE_RIGHT) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DOWN") PORT_CODE(KEYCODE_DOWN) - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') PORT_CHAR(0x1F) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_CHAR(0x7E) - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\\ |") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') PORT_CHAR(0x1C) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l') - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_CHAR(0x60) - - PORT_START("KEY.7") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL) PORT_CHAR(127) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('{') PORT_CHAR('}') - PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) - PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) - PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) - PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) - PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) - PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNC") PORT_CODE(KEYCODE_END) -INPUT_PORTS_END - - - -//************************************************************************** -// VIDEO -//************************************************************************** - -TIMER_DEVICE_CALLBACK_MEMBER(vixen_state::vsync_tick) -{ - if (m_cmd_d0) - { - m_vsync = 1; - update_interrupt(); - } -} - -void vixen_state::video_start() -{ - // register for state saving - save_item(NAME(m_alt)); - save_item(NAME(m_256)); - save_item(NAME(m_vsync)); -} - -uint32_t vixen_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) -{ - const pen_t *pen = m_palette->pens(); - uint8_t x, y, chr, gfx, inv, ra; - - for (y = 0; y < 26; y++) - { - for (ra = 0; ra < 10; ra++) - { - for (x = 0; x < 128; x++) - { - uint16_t sync_addr = ((y+1) << 7) + x + 1; // it's out by a row and a column - uint8_t sync_data = m_sync_rom[sync_addr & 0xfff]; - bool blank = BIT(sync_data, 4); - /* - int clrchadr = BIT(sync_data, 7); - int hsync = BIT(sync_data, 6); - int clrtxadr = BIT(sync_data, 5); - int vsync = BIT(sync_data, 3); - int comp_sync = BIT(sync_data, 2); - - logerror("SYNC %03x:%02x TXADR %u SCAN %u CHADR %u : COMPSYNC %u VSYNC %u BLANK %u CLRTXADR %u HSYNC %u CLRCHADR %u\n", - sync_addr,sync_data,txadr,scan,chadr,comp_sync,vsync,blank,clrtxadr,hsync,clrchadr); - */ - - chr = m_video_ram[(y<<7) + x]; - - if (m_256) - { - gfx = m_char_rom[(BIT(chr, 7) << 11) | (ra << 7) | (chr & 0x7f)]; - inv = m_alt ? 0xff : 0; - } - else - { - gfx = m_char_rom[(ra << 7) | (chr & 0x7f)]; - inv = BIT(chr, 7) ? 0xff : 0; - } - - gfx = (blank) ? 0 : (gfx ^ inv); - - for (int b = 0; b < 8; b++) - { - int color = BIT(gfx, 7 - b); - - bitmap.pix32((y * 10) + ra, (x * 8) + b) = pen[color]; - } - } - } - } - - return 0; -} - - - -//************************************************************************** -// SOUND -//************************************************************************** - -static DISCRETE_SOUND_START( vixen_discrete ) - DISCRETE_INPUT_LOGIC(NODE_01) - DISCRETE_SQUAREWAVE(NODE_02, NODE_01, (23.9616_MHz_XTAL / 15360).dvalue(), 100, 50, 0, 90) - DISCRETE_OUTPUT(NODE_02, 2000) -DISCRETE_SOUND_END - - - -//************************************************************************** -// DEVICE CONFIGURATION -//************************************************************************** - -//------------------------------------------------- -// I8155 interface -//------------------------------------------------- - -READ8_MEMBER( vixen_state::i8155_pa_r ) -{ - uint8_t data = 0xff; - - for (int i = 0; i < 8; i++) - if (!BIT(m_col, i)) data &= m_key[i]->read(); - - return data; -} - -WRITE8_MEMBER( vixen_state::i8155_pb_w ) -{ - m_col = data; -} - -WRITE8_MEMBER( vixen_state::i8155_pc_w ) -{ - /* - - bit description - - 0 DSEL1/ - 1 DSEL2/ - 2 DDEN/ - 3 ALT CHARSET/ - 4 256 CHARS - 5 BEEP ENABLE - 6 - 7 - - */ - - // drive select - floppy_image_device *floppy = nullptr; - - 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->mon_w(0); - - // density select - m_fdc->dden_w(BIT(data, 2)); - - // charset - m_alt = !BIT(data, 3); - m_256 = !BIT(data, 4); - - // beep enable - m_discrete->write(NODE_01, !BIT(data, 5)); -} - -//------------------------------------------------- -// I8155 IO interface -//------------------------------------------------- - -WRITE8_MEMBER( vixen_state::io_i8155_pb_w ) -{ - /* - - bit description - - PB0 ATN - PB1 DAV - PB2 NDAC - PB3 NRFD - PB4 EOI - PB5 SRQ - PB6 IFC - PB7 REN - - */ - - /* data valid */ - m_ieee488->host_atn_w(BIT(data, 0)); - - /* end or identify */ - m_ieee488->host_dav_w(BIT(data, 1)); - - /* remote enable */ - m_ieee488->host_ndac_w(BIT(data, 2)); - - /* attention */ - m_ieee488->host_nrfd_w(BIT(data, 3)); - - /* interface clear */ - m_ieee488->host_eoi_w(BIT(data, 4)); - - /* service request */ - m_ieee488->host_srq_w(BIT(data, 5)); - - /* not ready for data */ - m_ieee488->host_ifc_w(BIT(data, 6)); - - /* data not accepted */ - m_ieee488->host_ren_w(BIT(data, 7)); -} - -WRITE8_MEMBER( vixen_state::io_i8155_pc_w ) -{ - /* - - bit description - - PC0 select internal clock - PC1 ENB RING INT - PC2 ENB RCV INT - PC3 ENB XMT INT - PC4 ENB ATN INT - PC5 ENB SRQ INT - PC6 - PC7 - - */ - - m_int_clk = BIT(data, 0); - m_enb_ring_int = BIT(data, 1); - m_enb_rcv_int = BIT(data, 2); - m_enb_xmt_int = BIT(data, 3); - m_enb_atn_int = BIT(data, 4); - m_enb_srq_int = BIT(data, 5); -} - -WRITE_LINE_MEMBER( vixen_state::io_i8155_to_w ) -{ - if (m_int_clk) - { - m_usart->write_txc(state); - m_usart->write_rxc(state); - } -} - -//------------------------------------------------- -// i8251_interface usart_intf -//------------------------------------------------- - -WRITE_LINE_MEMBER( vixen_state::rxrdy_w ) -{ - m_rxrdy = state; - update_interrupt(); -} - -WRITE_LINE_MEMBER( vixen_state::txrdy_w ) -{ - m_txrdy = state; - update_interrupt(); -} - -//------------------------------------------------- -// IEEE488 interface -//------------------------------------------------- - -WRITE_LINE_MEMBER( vixen_state::srq_w ) -{ - m_srq = state; - update_interrupt(); -} - -WRITE_LINE_MEMBER( vixen_state::atn_w ) -{ - m_atn = state; - update_interrupt(); -} - -static void vixen_floppies(device_slot_interface &device) -{ - device.option_add("525dd", FLOPPY_525_DD); -} - -WRITE_LINE_MEMBER( vixen_state::fdc_intrq_w ) -{ - m_fdint = state; - update_interrupt(); -} - - - -//************************************************************************** -// MACHINE INITIALIZATION -//************************************************************************** - -IRQ_CALLBACK_MEMBER(vixen_state::vixen_int_ack) -{ - // D0 is pulled low - return 0xfe; -} - -void vixen_state::machine_start() -{ - // configure memory banking - - membank("bank3")->configure_entry(0, m_video_ram); - membank("bank3")->configure_entry(1, m_rom); - - membank("bank4")->configure_entry(0, m_video_ram); - - // register for state saving - save_item(NAME(m_col)); - save_item(NAME(m_cmd_d0)); - save_item(NAME(m_cmd_d1)); - save_item(NAME(m_fdint)); -} - -void vixen_state::machine_reset() -{ - membank("bank3")->set_entry(1); - - m_vsync = 0; - m_cmd_d0 = 0; - m_cmd_d1 = 0; - update_interrupt(); - - m_fdc->reset(); - m_io_i8155->reset(); - m_usart->reset(); - m_maincpu->set_state_int(Z80_PC, 0xf000); -} - - - -//************************************************************************** -// MACHINE CONFIGURATION -//************************************************************************** - -void vixen_state::vixen(machine_config &config) -{ - // basic machine hardware - Z80(config, m_maincpu, 23.9616_MHz_XTAL / 6); - m_maincpu->set_addrmap(AS_PROGRAM, &vixen_state::vixen_mem); - m_maincpu->set_addrmap(AS_OPCODES, &vixen_state::bios_mem); - m_maincpu->set_addrmap(AS_IO, &vixen_state::vixen_io); - m_maincpu->set_irq_acknowledge_callback(FUNC(vixen_state::vixen_int_ack)); - - // video hardware - screen_device &screen(SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER)); - screen.set_color(rgb_t::amber()); - screen.set_screen_update(FUNC(vixen_state::screen_update)); - screen.set_raw(23.9616_MHz_XTAL / 2, 96*8, 0*8, 81*8, 27*10, 0*10, 26*10); - - TIMER(config, "vsync").configure_scanline(FUNC(vixen_state::vsync_tick), SCREEN_TAG, 26*10, 27*10); - - PALETTE(config, m_palette, palette_device::MONOCHROME); - - // sound hardware - SPEAKER(config, "mono").front_center(); - DISCRETE(config, DISCRETE_TAG, vixen_discrete).add_route(ALL_OUTPUTS, "mono", 0.20); - - // devices - i8155_device &i8155(I8155(config, P8155H_TAG, 23.9616_MHz_XTAL / 6)); - i8155.in_pa_callback().set(FUNC(vixen_state::i8155_pa_r)); - i8155.out_pb_callback().set(FUNC(vixen_state::i8155_pb_w)); - i8155.out_pc_callback().set(FUNC(vixen_state::i8155_pc_w)); - - i8155_device &i8155_io(I8155(config, P8155H_IO_TAG, 23.9616_MHz_XTAL / 6)); - i8155_io.out_pa_callback().set(m_ieee488, FUNC(ieee488_device::host_dio_w)); - i8155_io.out_pb_callback().set(FUNC(vixen_state::io_i8155_pb_w)); - i8155_io.out_pc_callback().set(FUNC(vixen_state::io_i8155_pc_w)); - i8155_io.out_to_callback().set(FUNC(vixen_state::io_i8155_to_w)); - - I8251(config, m_usart, 0); - m_usart->txd_handler().set(m_rs232, FUNC(rs232_port_device::write_txd)); - m_usart->dtr_handler().set(m_rs232, FUNC(rs232_port_device::write_dtr)); - m_usart->rts_handler().set(m_rs232, FUNC(rs232_port_device::write_rts)); - m_usart->rxrdy_handler().set(FUNC(vixen_state::rxrdy_w)); - m_usart->txrdy_handler().set(FUNC(vixen_state::txrdy_w)); - - RS232_PORT(config, m_rs232, default_rs232_devices, nullptr); - m_rs232->rxd_handler().set(m_usart, FUNC(i8251_device::write_rxd)); - m_rs232->dsr_handler().set(m_usart, FUNC(i8251_device::write_dsr)); - - FD1797(config, m_fdc, 23.9616_MHz_XTAL / 24); - m_fdc->intrq_wr_callback().set(FUNC(vixen_state::fdc_intrq_w)); - FLOPPY_CONNECTOR(config, FDC1797_TAG":0", vixen_floppies, "525dd", floppy_image_device::default_floppy_formats).enable_sound(true); - FLOPPY_CONNECTOR(config, FDC1797_TAG":1", vixen_floppies, "525dd", floppy_image_device::default_floppy_formats).enable_sound(true); - IEEE488(config, m_ieee488); - m_ieee488->srq_callback().set(FUNC(vixen_state::srq_w)); - m_ieee488->atn_callback().set(FUNC(vixen_state::atn_w)); - - /* software lists */ - SOFTWARE_LIST(config, "disk_list").set_original("vixen"); - - // internal ram - RAM(config, RAM_TAG).set_default_size("64K"); -} - - - -//************************************************************************** -// ROMS -//************************************************************************** - -ROM_START( vixen ) - ROM_REGION( 0x1000, Z8400A_TAG, 0 ) - ROM_LOAD( "osborne 4 mon rom v1.04 3p40082-03 a0a9.4c", 0x0000, 0x1000, CRC(5f1038ce) SHA1(e6809fac23650bbb4689e58edc768d917d80a2df) ) // OSBORNE 4 MON ROM / V1.04 3P40082-03 / A0A9 (c) OCC 1985 - - ROM_REGION( 0x1000, "video", 0 ) - ROM_LOAD( "v1.10.3j", 0x0000, 0x1000, CRC(1f93e2d7) SHA1(0c479bfd3ac8d9959c285c020d0096930a9c6867) ) - - ROM_REGION( 0x1000, "chargen", 0 ) - ROM_LOAD( "v1.00 l.1j", 0x0000, 0x1000, CRC(f97c50d9) SHA1(39f73afad68508c4b8a4d241c064f9978098d8f2) ) -ROM_END - - - -//************************************************************************** -// DRIVER INITIALIZATION -//************************************************************************** - -void vixen_state::init_vixen() -{ - m_program = &m_maincpu->space(AS_PROGRAM); -} - - - -//************************************************************************** -// SYSTEM DRIVERS -//************************************************************************** - -// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS -COMP( 1984, vixen, 0, 0, vixen, vixen, vixen_state, init_vixen, "Osborne", "Vixen", 0 ) |