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Diffstat (limited to 'src/mess/machine/sorcerer.c')
-rw-r--r--src/mess/machine/sorcerer.c492
1 files changed, 0 insertions, 492 deletions
diff --git a/src/mess/machine/sorcerer.c b/src/mess/machine/sorcerer.c
deleted file mode 100644
index 25fb66015e3..00000000000
--- a/src/mess/machine/sorcerer.c
+++ /dev/null
@@ -1,492 +0,0 @@
-// license:GPL-2.0+
-// copyright-holders:Kevin Thacker, Robbbert
-/******************************************************************************
-
- Exidy Sorcerer machine functions
-
-*******************************************************************************/
-
-#include "includes/sorcerer.h"
-#include "machine/z80bin.h"
-
-#if SORCERER_USING_RS232
-
-/* The serial code (which was never connected to the outside) is disabled for now. */
-
-/* timer for sorcerer serial chip transmit and receive */
-
-TIMER_CALLBACK_MEMBER(sorcerer_state::sorcerer_serial_tc)
-{
- /* if rs232 is enabled, uart is connected to clock defined by bit6 of port fe.
- Transmit and receive clocks are connected to the same clock */
-
- /* if rs232 is disabled, receive clock is linked to cassette hardware */
- if (m_fe & 0x80)
- {
- /* connect to rs232 */
- }
-}
-#endif
-
-
-void sorcerer_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
-{
- switch (id)
- {
- case TIMER_SERIAL:
-#if SORCERER_USING_RS232
- sorcerer_serial_tc(ptr, param);
-#endif
- break;
- case TIMER_CASSETTE:
- sorcerer_cassette_tc(ptr, param);
- break;
- case TIMER_RESET:
- sorcerer_reset(ptr, param);
- break;
- default:
- assert_always(FALSE, "Unknown id in sorcerer_state::device_timer");
- }
-}
-
-
-/* timer to read cassette waveforms */
-
-TIMER_CALLBACK_MEMBER(sorcerer_state::sorcerer_cassette_tc)
-{
- UINT8 cass_ws = 0;
- switch (m_fe & 0xc0) /*/ bit 7 low indicates cassette */
- {
- case 0x00: /* Cassette 300 baud */
-
- /* loading a tape - this is basically the same as the super80.
- We convert the 1200/2400 Hz signal to a 0 or 1, and send it to the uart. */
-
- m_cass_data.input.length++;
-
- cass_ws = ((((m_fe & 0x20) ? m_cassette2 : m_cassette1))->input() > +0.02) ? 1 : 0;
-
- if (cass_ws != m_cass_data.input.level)
- {
- m_cass_data.input.level = cass_ws;
- m_cass_data.input.bit = ((m_cass_data.input.length < 0x6) || (m_cass_data.input.length > 0x20)) ? 1 : 0;
- m_cass_data.input.length = 0;
- m_uart->set_input_pin(AY31015_SI, m_cass_data.input.bit);
- }
-
- /* saving a tape - convert the serial stream from the uart, into 1200 and 2400 Hz frequencies.
- Synchronisation of the frequency pulses to the uart is extremely important. */
-
- m_cass_data.output.length++;
- if (!(m_cass_data.output.length & 0x1f))
- {
- cass_ws = m_uart->get_output_pin(AY31015_SO);
- if (cass_ws != m_cass_data.output.bit)
- {
- m_cass_data.output.bit = cass_ws;
- m_cass_data.output.length = 0;
- }
- }
-
- if (!(m_cass_data.output.length & 3))
- {
- if (!((m_cass_data.output.bit == 0) && (m_cass_data.output.length & 4)))
- {
- m_cass_data.output.level ^= 1; // toggle output this, except on 2nd half of low bit
- ((m_fe & 0x20) ? m_cassette2 : m_cassette1)->output(m_cass_data.output.level ? -1.0 : +1.0);
- }
- }
- return;
-
- case 0x40: /* Cassette 1200 baud */
- /* loading a tape */
- m_cass_data.input.length++;
-
- cass_ws = ((((m_fe & 0x20) ? m_cassette2 : m_cassette1))->input() > +0.02) ? 1 : 0;
-
- if (cass_ws != m_cass_data.input.level || m_cass_data.input.length == 10)
- {
- m_cass_data.input.bit = ((m_cass_data.input.length < 10) || (m_cass_data.input.length > 0x20)) ? 1 : 0;
- if ( cass_ws != m_cass_data.input.level )
- {
- m_cass_data.input.length = 0;
- m_cass_data.input.level = cass_ws;
- }
- m_uart->set_input_pin(AY31015_SI, m_cass_data.input.bit);
- }
-
- /* saving a tape - convert the serial stream from the uart, into 600 and 1200 Hz frequencies. */
-
- m_cass_data.output.length++;
- if (!(m_cass_data.output.length & 7))
- {
- cass_ws = m_uart->get_output_pin(AY31015_SO);
- if (cass_ws != m_cass_data.output.bit)
- {
- m_cass_data.output.bit = cass_ws;
- m_cass_data.output.length = 0;
- }
- }
-
- if (!(m_cass_data.output.length & 7))
- {
- if (!((m_cass_data.output.bit == 0) && (m_cass_data.output.length & 8)))
- {
- m_cass_data.output.level ^= 1; // toggle output this, except on 2nd half of low bit
- ((m_fe & 0x20) ? m_cassette2 : m_cassette1)->output(m_cass_data.output.level ? -1.0 : +1.0);
- }
- }
- return;
- }
-}
-
-
-/* after the first 4 bytes have been read from ROM, switch the ram back in */
-TIMER_CALLBACK_MEMBER(sorcerer_state::sorcerer_reset)
-{
- membank("boot")->set_entry(0);
-}
-
-WRITE8_MEMBER(sorcerer_state::sorcerer_fc_w)
-{
- m_uart->set_transmit_data(data);
-}
-
-
-WRITE8_MEMBER(sorcerer_state::sorcerer_fd_w)
-{
- /* Translate data to control signals */
-
- m_uart->set_input_pin(AY31015_CS, 0);
- m_uart->set_input_pin(AY31015_NB1, BIT(data, 0));
- m_uart->set_input_pin(AY31015_NB2, BIT(data, 1));
- m_uart->set_input_pin(AY31015_TSB, BIT(data, 2));
- m_uart->set_input_pin(AY31015_EPS, BIT(data, 3));
- m_uart->set_input_pin(AY31015_NP, BIT(data, 4));
- m_uart->set_input_pin(AY31015_CS, 1);
-}
-
-WRITE8_MEMBER(sorcerer_state::sorcerer_fe_w)
-{
- UINT8 changed_bits = (m_fe ^ data) & 0xf0;
- m_fe = data;
-
- /* bits 0..3 */
- m_keyboard_line = data & 0x0f;
-
- if (!changed_bits) return;
-
- /* bits 4..5 */
- /* does user want to hear the sound? */
-
- if (!BIT(data, 7)) // cassette operations
- {
-#if SORCERER_USING_RS232
- m_serial_timer->adjust(attotime::zero);
-#endif
-
- bool sound = BIT(m_iop_config->read(), 3);
-
- m_cassette1->change_state(
- (BIT(data,4) & sound) ? CASSETTE_SPEAKER_ENABLED : CASSETTE_SPEAKER_MUTED, CASSETTE_MASK_SPEAKER);
-
- m_cassette2->change_state(
- (BIT(data,5) & sound) ? CASSETTE_SPEAKER_ENABLED : CASSETTE_SPEAKER_MUTED, CASSETTE_MASK_SPEAKER);
-
- /* cassette 1 motor */
- m_cassette1->change_state(
- (BIT(data,4)) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
-
- /* cassette 2 motor */
- m_cassette2->change_state(
- (BIT(data,5)) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
-
- if (data & 0x30)
- m_cassette_timer->adjust(attotime::zero, 0, attotime::from_hz(19200));
- else
- m_cassette_timer->adjust(attotime::zero);
- }
-#if SORCERER_USING_RS232
- else
- {
- m_serial_timer->adjust(attotime::zero, 0, attotime::from_hz(19200));
- m_cassette_timer->adjust(attotime::zero);
- }
-#endif
-
- // bit 6 baud rate */
- if (BIT(changed_bits, 6))
- {
- m_uart->set_receiver_clock(BIT(data, 6) ? 19200.0 : 4800.0);
- m_uart->set_transmitter_clock(BIT(data, 6) ? 19200.0 : 4800.0);
- }
-}
-
-WRITE8_MEMBER(sorcerer_state::sorcerer_ff_w)
-{
- /// TODO: create a sorcerer parallel slot with a 7 bit and 8 bit centronics adapter as two of the options
- /// TODO: figure out what role FE plays http://www.trailingedge.com/exidy/exidych7.html
- m_centronics->write_data0(BIT(data, 0));
- m_centronics->write_data1(BIT(data, 1));
- m_centronics->write_data2(BIT(data, 2));
- m_centronics->write_data3(BIT(data, 3));
- m_centronics->write_data4(BIT(data, 4));
- m_centronics->write_data5(BIT(data, 5));
- m_centronics->write_data6(BIT(data, 6));
-
- /* reading the config switch */
- switch (m_iop_config->read() & 0x02)
- {
- case 0: /* 7-bit port */
- /* bit 7 = strobe, bit 6..0 = data */
- m_centronics->write_data7(0);
- m_centronics->write_strobe(BIT(data, 7));
- break;
-
- case 2: /* 8-bit port */
- /* hardware strobe driven from port select, bit 7..0 = data */
- m_centronics->write_data7(BIT(data, 7));
- m_centronics->write_strobe(0);
- m_centronics->write_strobe(1);
- break;
- }
-}
-
-READ8_MEMBER(sorcerer_state::sorcerer_fc_r)
-{
- UINT8 data = m_uart->get_received_data();
- m_uart->set_input_pin(AY31015_RDAV, 0);
- m_uart->set_input_pin(AY31015_RDAV, 1);
- return data;
-}
-
-READ8_MEMBER(sorcerer_state::sorcerer_fd_r)
-{
- /* set unused bits high */
- UINT8 data = 0xe0;
-
- m_uart->set_input_pin(AY31015_SWE, 0);
- data |= m_uart->get_output_pin(AY31015_TBMT) ? 0x01 : 0;
- data |= m_uart->get_output_pin(AY31015_DAV ) ? 0x02 : 0;
- data |= m_uart->get_output_pin(AY31015_OR ) ? 0x04 : 0;
- data |= m_uart->get_output_pin(AY31015_FE ) ? 0x08 : 0;
- data |= m_uart->get_output_pin(AY31015_PE ) ? 0x10 : 0;
- m_uart->set_input_pin(AY31015_SWE, 1);
-
- return data;
-}
-
-READ8_MEMBER(sorcerer_state::sorcerer_fe_r)
-{
- /* bits 6..7
- - hardware handshakes from user port
- - not emulated
- - tied high, allowing PARIN and PAROUT bios routines to run */
-
- UINT8 data = 0xc0;
-
- /* bit 5 - vsync */
- data |= m_iop_vs->read();
-
- /* bits 4..0 - keyboard data */
- data |= m_iop_x[m_keyboard_line]->read();
-
- return data;
-}
-
-/******************************************************************************
- Snapshot Handling
-******************************************************************************/
-
-SNAPSHOT_LOAD_MEMBER( sorcerer_state,sorcerer)
-{
- UINT8 *RAM = memregion(m_maincpu->tag())->base();
- address_space &space = m_maincpu->space(AS_PROGRAM);
- UINT8 header[28];
- unsigned char s_byte;
-
- /* check size */
- if (snapshot_size != 0x1001c)
- {
- image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Snapshot must be 65564 bytes");
- image.message("Snapshot must be 65564 bytes");
- return IMAGE_INIT_FAIL;
- }
-
- /* get the header */
- image.fread( &header, sizeof(header));
-
- /* write it to ram */
- for (int i = 0; i < 0xc000; i++)
- {
- image.fread( &s_byte, 1);
- space.write_byte(i, s_byte);
- }
- image.fread( RAM+0xc000, 0x4000);
-
- /* patch CPU registers */
- m_maincpu->set_state_int(Z80_I, header[0]);
- m_maincpu->set_state_int(Z80_HL2, header[1] | (header[2] << 8));
- m_maincpu->set_state_int(Z80_DE2, header[3] | (header[4] << 8));
- m_maincpu->set_state_int(Z80_BC2, header[5] | (header[6] << 8));
- m_maincpu->set_state_int(Z80_AF2, header[7] | (header[8] << 8));
- m_maincpu->set_state_int(Z80_HL, header[9] | (header[10] << 8));
- m_maincpu->set_state_int(Z80_DE, header[11] | (header[12] << 8));
- m_maincpu->set_state_int(Z80_BC, header[13] | (header[14] << 8));
- m_maincpu->set_state_int(Z80_IY, header[15] | (header[16] << 8));
- m_maincpu->set_state_int(Z80_IX, header[17] | (header[18] << 8));
- m_maincpu->set_state_int(Z80_IFF1, header[19]&2 ? 1 : 0);
- m_maincpu->set_state_int(Z80_IFF2, header[19]&4 ? 1 : 0);
- m_maincpu->set_state_int(Z80_R, header[20]);
- m_maincpu->set_state_int(Z80_AF, header[21] | (header[22] << 8));
- m_maincpu->set_state_int(STATE_GENSP, header[23] | (header[24] << 8));
- m_maincpu->set_state_int(Z80_IM, header[25]);
- m_maincpu->set_pc(header[26] | (header[27] << 8));
-
- return IMAGE_INIT_PASS;
-}
-
-void sorcerer_state::machine_start()
-{
- m_cassette_timer = timer_alloc(TIMER_CASSETTE);
-#if SORCERER_USING_RS232
- m_serial_timer = timer_alloc(TIMER_SERIAL);
-#endif
-
- UINT16 endmem = 0xbfff;
-
- address_space &space = m_maincpu->space(AS_PROGRAM);
- /* configure RAM */
- switch (m_ram->size())
- {
- case 8*1024:
- space.unmap_readwrite(0x2000, endmem);
- break;
-
- case 16*1024:
- space.unmap_readwrite(0x4000, endmem);
- break;
-
- case 32*1024:
- space.unmap_readwrite(0x8000, endmem);
- break;
- }
-
- if (m_cart->exists())
- space.install_read_handler(0xc000, 0xdfff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_cart));
-}
-
-MACHINE_START_MEMBER(sorcerer_state,sorcererd)
-{
- m_cassette_timer = timer_alloc(TIMER_CASSETTE);
-#if SORCERER_USING_RS232
- m_serial_timer = timer_alloc(TIMER_SERIAL);
-#endif
-
- UINT16 endmem = 0xbbff;
-
- address_space &space = m_maincpu->space(AS_PROGRAM);
- /* configure RAM */
- switch (m_ram->size())
- {
- case 8*1024:
- space.unmap_readwrite(0x2000, endmem);
- break;
-
- case 16*1024:
- space.unmap_readwrite(0x4000, endmem);
- break;
-
- case 32*1024:
- space.unmap_readwrite(0x8000, endmem);
- break;
- }
-
- if (m_cart->exists())
- space.install_read_handler(0xc000, 0xdfff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_cart));
-}
-
-void sorcerer_state::machine_reset()
-{
- address_space &space = m_maincpu->space(AS_PROGRAM);
-
- /* Initialize cassette interface */
- m_cass_data.output.length = 0;
- m_cass_data.output.level = 1;
- m_cass_data.input.length = 0;
- m_cass_data.input.bit = 1;
-
- m_fe = 0xff;
- sorcerer_fe_w(space, 0, 0, 0xff);
-
- membank("boot")->set_entry(1);
- timer_set(attotime::from_usec(10), TIMER_RESET);
-}
-
-
-/*-------------------------------------------------
- QUICKLOAD_LOAD_MEMBER( sorcerer_state, sorcerer )
--------------------------------------------------*/
-
-QUICKLOAD_LOAD_MEMBER( sorcerer_state, sorcerer )
-{
- UINT16 execute_address, start_address, end_address;
- int autorun;
- address_space &space = m_maincpu->space(AS_PROGRAM);
-
- /* load the binary into memory */
- if (z80bin_load_file(&image, space, file_type, &execute_address, &start_address, &end_address) == IMAGE_INIT_FAIL)
- return IMAGE_INIT_FAIL;
-
- /* is this file executable? */
- if (execute_address != 0xffff)
- {
- /* check to see if autorun is on (I hate how this works) */
- autorun = m_iop_config->read() & 1;
-
- if ((execute_address >= 0xc000) && (execute_address <= 0xdfff) && (space.read_byte(0xdffa) != 0xc3))
- return IMAGE_INIT_FAIL; /* can't run a program if the cartridge isn't in */
-
- /* Since Exidy Basic is by Microsoft, it needs some preprocessing before it can be run.
- 1. A start address of 01D5 indicates a basic program which needs its pointers fixed up.
- 2. If autorunning, jump to C689 (command processor), else jump to C3DD (READY prompt).
- Important addresses:
- 01D5 = start (load) address of a conventional basic program
- C858 = an autorun basic program will have this exec address on the tape
- C3DD = part of basic that displays READY and lets user enter input */
-
- if ((start_address == 0x1d5) || (execute_address == 0xc858))
- {
- UINT8 i;
- static const UINT8 data[]={
- 0xcd, 0x26, 0xc4, // CALL C426 ;set up other pointers
- 0x21, 0xd4, 1, // LD HL,01D4 ;start of program address (used by C689)
- 0x36, 0, // LD (HL),00 ;make sure dummy end-of-line is there
- 0xc3, 0x89, 0xc6 // JP C689 ;run program
- };
-
- for (i = 0; i < ARRAY_LENGTH(data); i++)
- space.write_byte(0xf01f + i, data[i]);
-
- if (!autorun)
- space.write_word(0xf028,0xc3dd);
-
- /* tell BASIC where program ends */
- space.write_byte(0x1b7, end_address & 0xff);
- space.write_byte(0x1b8, (end_address >> 8) & 0xff);
-
- if ((execute_address != 0xc858) && autorun)
- space.write_word(0xf028, execute_address);
-
- m_maincpu->set_pc(0xf01f);
- }
- else
- {
- if (autorun)
- m_maincpu->set_pc(execute_address);
- }
-
- }
-
- return IMAGE_INIT_PASS;
-}