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Diffstat (limited to 'src/mess/machine/microtan.c')
-rw-r--r-- | src/mess/machine/microtan.c | 855 |
1 files changed, 0 insertions, 855 deletions
diff --git a/src/mess/machine/microtan.c b/src/mess/machine/microtan.c deleted file mode 100644 index 4fca3fe18ca..00000000000 --- a/src/mess/machine/microtan.c +++ /dev/null @@ -1,855 +0,0 @@ -// license:GPL-2.0+ -// copyright-holders:Juergen Buchmueller -/****************************************************************************** - * Microtan 65 - * - * machine driver - * - * Juergen Buchmueller <pullmoll@t-online.de>, Jul 2000 - * - * Thanks go to Geoff Macdonald <mail@geoff.org.uk> - * for his site http:://www.geo255.redhotant.com - * and to Fabrice Frances <frances@ensica.fr> - * for his site http://www.ifrance.com/oric/microtan.html - * - *****************************************************************************/ - -/* Core includes */ -#include "emu.h" -#include "includes/microtan.h" - -/* Components */ -#include "cpu/m6502/m6502.h" -#include "machine/6522via.h" -#include "machine/mos6551.h" -#include "sound/ay8910.h" - -/* Devices */ -#include "imagedev/cassette.h" -//#include "imagedev/snapquik.h" - - -#ifndef VERBOSE -#define VERBOSE 0 -#endif - -#define LOG(x) do { if (VERBOSE) logerror x; } while (0) - - - - -static const char keyboard[8][9][8] = { - { /* normal */ - { 27,'1','2','3','4','5','6','7'}, - {'8','9','0','-','=','`',127, 9}, - {'q','w','e','r','t','y','u','i'}, - {'o','p','[',']', 13,127, 0, 0}, - {'a','s','d','f','g','h','j','k'}, - {'l',';', 39, 92, 0,'z','x','c'}, - {'v','b','n','m',',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Shift */ - { 27,'!','@','#','$','%','^','&'}, - {'*','(',')','_','+','~',127, 9}, - {'Q','W','E','R','T','Y','U','I'}, - {'O','P','{','}', 13,127, 0, 0}, - {'A','S','D','F','G','H','J','K'}, - {'L',':','"','|', 0,'Z','X','C'}, - {'V','B','N','M','<','>','?', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Control */ - { 27,'1','2','3','4','5','6','7'}, - {'8','9','0','-','=','`',127, 9}, - { 17, 23, 5, 18, 20, 25, 21, 9}, - { 15, 16, 27, 29, 13,127, 0, 0}, - { 1, 19, 4, 6, 7, 8, 10, 11}, - { 12,';', 39, 28, 0, 26, 24, 3}, - { 22, 2, 14, 13,',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Shift+Control */ - { 27,'!', 0,'#','$','%', 30,'&'}, - {'*','(',')', 31,'+','~',127, 9}, - { 17, 23, 5, 18, 20, 25, 21, 9}, - { 15, 16, 27, 29, 13,127, 0, 0}, - { 1, 19, 4, 6, 7, 8, 10, 11}, - { 12,':','"', 28, 0, 26, 24, 3}, - { 22, 2, 14, 13,',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* CapsLock */ - { 27,'1','2','3','4','5','6','7'}, - {'8','9','0','-','=','`',127, 9}, - {'Q','W','E','R','T','Y','U','I'}, - {'O','P','[',']', 13,127, 0, 0}, - {'A','S','D','F','G','H','J','K'}, - {'L',';', 39, 92, 0,'Z','X','C'}, - {'V','B','N','M',',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Shift+CapsLock */ - { 27,'!','@','#','$','%','^','&'}, - {'*','(',')','_','+','~',127, 9}, - {'Q','W','E','R','T','Y','U','I'}, - {'O','P','{','}', 13,127, 0, 0}, - {'A','S','D','F','G','H','J','K'}, - {'L',':','"','|', 0,'Z','X','C'}, - {'V','B','N','M','<','>','?', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Control+CapsLock */ - { 27,'1','2','3','4','5','6','7'}, - {'8','9','0','-','=','`',127, 9}, - { 17, 23, 5, 18, 20, 25, 21, 9}, - { 15, 16, 27, 29, 13,127, 0, 0}, - { 1, 19, 4, 6, 7, 8, 10, 11}, - { 12,';', 39, 28, 0, 26, 24, 3}, - { 22, 2, 14, 13,',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, - { /* Shift+Control+CapsLock */ - { 27,'!', 0,'#','$','%', 30,'&'}, - {'*','(',')', 31,'+','~',127, 9}, - { 17, 23, 5, 18, 20, 25, 21, 9}, - { 15, 16, 27, 29, 13,127, 0, 0}, - { 1, 19, 4, 6, 7, 8, 10, 11}, - { 12,':','"', 28, 0, 26, 24, 3}, - { 22, 2, 14, 13,',','.','/', 0}, - { 10,' ','-',',', 13,'.','0','1'}, - {'2','3','4','5','6','7','8','9'}, - }, -}; - -UINT8 microtan_state::read_dsw() -{ - UINT8 result; - switch(machine().phase()) - { - case MACHINE_PHASE_RESET: - case MACHINE_PHASE_RUNNING: - result = ioport("DSW")->read(); - break; - - default: - result = 0x00; - break; - } - return result; -} - -void microtan_state::microtan_set_irq_line() -{ - /* The 6502 IRQ line is active low and probably driven - by open collector outputs (guess). Since MAME/MESS use - a non-0 value for ASSERT_LINE we OR the signals here */ - m_maincpu->set_input_line(0, m_via_0_irq_line | m_via_1_irq_line | m_kbd_irq_line); -} - -/************************************************************** - * VIA callback functions for VIA #0 - **************************************************************/ -READ8_MEMBER(microtan_state::via_0_in_a) -{ - int data = ioport("JOY")->read(); - LOG(("microtan_via_0_in_a %02X\n", data)); - return data; -} - -WRITE8_MEMBER(microtan_state::via_0_out_a) -{ - LOG(("microtan_via_0_out_a %02X\n", data)); -} - -WRITE8_MEMBER(microtan_state::via_0_out_b) -{ - LOG(("microtan_via_0_out_b %02X\n", data)); - /* bit #7 is the cassette output signal */ - m_cassette->output(data & 0x80 ? +1.0 : -1.0); -} - -WRITE_LINE_MEMBER(microtan_state::via_0_out_ca2) -{ - LOG(("microtan_via_0_out_ca2 %d\n", state)); -} - -WRITE_LINE_MEMBER(microtan_state::via_0_out_cb2) -{ - LOG(("microtan_via_0_out_cb2 %d\n", state)); -} - -WRITE_LINE_MEMBER(microtan_state::via_0_irq) -{ - LOG(("microtan_via_0_irq %d\n", state)); - m_via_0_irq_line = state; - microtan_set_irq_line(); -} - -/************************************************************** - * VIA callback functions for VIA #1 - **************************************************************/ - -WRITE8_MEMBER(microtan_state::via_1_out_a) -{ - LOG(("microtan_via_1_out_a %02X\n", data)); -} - -WRITE8_MEMBER(microtan_state::via_1_out_b) -{ - LOG(("microtan_via_1_out_b %02X\n", data)); -} - -WRITE_LINE_MEMBER(microtan_state::via_1_out_ca2) -{ - LOG(("microtan_via_1_out_ca2 %d\n", state)); -} - -WRITE_LINE_MEMBER(microtan_state::via_1_out_cb2) -{ - LOG(("microtan_via_1_out_cb2 %d\n", state)); -} - -WRITE_LINE_MEMBER(microtan_state::via_1_irq) -{ - LOG(("microtan_via_1_irq %d\n", state)); - m_via_1_irq_line = state; - microtan_set_irq_line(); -} - -void microtan_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch (id) - { - case TIMER_READ_CASSETTE: - microtan_read_cassette(ptr, param); - break; - case TIMER_PULSE_NMI: - microtan_pulse_nmi(ptr, param); - break; - default: - assert_always(FALSE, "Unknown id in microtan_state::device_timer"); - } -} - - -TIMER_CALLBACK_MEMBER(microtan_state::microtan_read_cassette) -{ - double level = m_cassette->input(); - - LOG(("microtan_read_cassette: %g\n", level)); - if (level < -0.07) - m_via6522_0->write_cb2(0); - else if (level > +0.07) - m_via6522_0->write_cb2(1); -} - -READ8_MEMBER(microtan_state::microtan_sound_r) -{ - int data = 0xff; - LOG(("microtan_sound_r: -> %02x\n", data)); - return data; -} - -WRITE8_MEMBER(microtan_state::microtan_sound_w) -{ - LOG(("microtan_sound_w: <- %02x\n", data)); -} - - -READ8_MEMBER(microtan_state::microtan_bffx_r) -{ - int data = 0xff; - switch( offset & 3 ) - { - case 0: /* BFF0: read enables chunky graphics */ - m_chunky_graphics = 1; - LOG(("microtan_bff0_r: -> %02x (chunky graphics on)\n", data)); - break; - case 1: /* BFF1: read undefined (?) */ - LOG(("microtan_bff1_r: -> %02x\n", data)); - break; - case 2: /* BFF2: read undefined (?) */ - LOG(("microtan_bff2_r: -> %02x\n", data)); - break; - default: /* BFF3: read keyboard ASCII value */ - data = m_keyboard_ascii; - LOG(("microtan_bff3_r: -> %02x (keyboard ASCII)\n", data)); - } - return data; -} - - -/* This callback is called one clock cycle after BFF2 is written (delayed nmi) */ -TIMER_CALLBACK_MEMBER(microtan_state::microtan_pulse_nmi) -{ - m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE); -} - -WRITE8_MEMBER(microtan_state::microtan_bffx_w) -{ - switch( offset & 3 ) - { - case 0: /* BFF0: write reset keyboard interrupt flag */ - /* This removes bit 7 from the ASCII value of the last key pressed. */ - LOG(("microtan_bff0_w: %d <- %02x (keyboard IRQ clear )\n", offset, data)); - m_keyboard_ascii &= ~0x80; - m_kbd_irq_line = CLEAR_LINE; - microtan_set_irq_line(); - break; - case 1: /* BFF1: write delayed NMI */ - LOG(("microtan_bff1_w: %d <- %02x (delayed NMI)\n", offset, data)); - timer_set(m_maincpu->cycles_to_attotime(8), TIMER_PULSE_NMI); - break; - case 2: /* BFF2: write keypad column write (what is this meant for?) */ - LOG(("microtan_bff2_w: %d <- %02x (keypad column)\n", offset, data)); - m_keypad_column = data; - break; - default: /* BFF3: write disable chunky graphics */ - LOG(("microtan_bff3_w: %d <- %02x (chunky graphics off)\n", offset, data)); - m_chunky_graphics = 0; - } -} - -void microtan_state::store_key(int key) -{ - LOG(("microtan: store key '%c'\n", key)); - m_keyboard_ascii = key | 0x80; - m_kbd_irq_line = ASSERT_LINE; - microtan_set_irq_line(); -} - -INTERRUPT_GEN_MEMBER(microtan_state::microtan_interrupt) -{ - int mod, row, col, chg, newvar; - static const char *const keynames[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7", "ROW8" }; - - if( m_repeat ) - { - if( !--m_repeat ) - m_repeater = 4; - } - else if( m_repeater ) - { - m_repeat = m_repeater; - } - - - row = 9; - newvar = ioport("ROW8")->read(); - chg = m_keyrows[--row] ^ newvar; - - while ( !chg && row > 0) - { - newvar = ioport(keynames[row - 1])->read(); - chg = m_keyrows[--row] ^ newvar; - } - if (!chg) - --row; - - if (row >= 0) - { - m_repeater = 0x00; - m_mask = 0x00; - m_key = 0x00; - m_lastrow = row; - /* CapsLock LED */ - if( row == 3 && chg == 0x80 ) - set_led_status(machine(), 1, (m_keyrows[3] & 0x80) ? 0 : 1); - - if (newvar & chg) /* key(s) pressed ? */ - { - mod = 0; - - /* Shift modifier */ - if ( (m_keyrows[5] & 0x10) || (m_keyrows[6] & 0x80) ) - mod |= 1; - - /* Control modifier */ - if (m_keyrows[3] & 0x40) - mod |= 2; - - /* CapsLock modifier */ - if (m_keyrows[3] & 0x80) - mod |= 4; - - /* find newvar key */ - m_mask = 0x01; - for (col = 0; col < 8; col ++) - { - if (chg & m_mask) - { - newvar &= m_mask; - m_key = keyboard[mod][row][col]; - break; - } - m_mask <<= 1; - } - if( m_key ) /* normal key */ - { - m_repeater = 30; - store_key(m_key); - } - else - if( (row == 0) && (chg == 0x04) ) /* Ctrl-@ (NUL) */ - store_key(0); - m_keyrows[row] |= newvar; - } - else - { - m_keyrows[row] = newvar; - } - m_repeat = m_repeater; - } - else - if ( m_key && (m_keyrows[m_lastrow] & m_mask) && m_repeat == 0 ) - { - store_key(m_key); - } -} - -DRIVER_INIT_MEMBER(microtan_state,microtan) -{ - UINT8 *dst = memregion("gfx2")->base(); - int i; - address_space &space = m_maincpu->space(AS_PROGRAM); - - for (i = 0; i < 256; i++) - { - switch (i & 3) - { - case 0: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x00; break; - case 1: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xf0; break; - case 2: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x0f; break; - case 3: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xff; break; - } - dst += 4; - switch ((i >> 2) & 3) - { - case 0: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x00; break; - case 1: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xf0; break; - case 2: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x0f; break; - case 3: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xff; break; - } - dst += 4; - switch ((i >> 4) & 3) - { - case 0: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x00; break; - case 1: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xf0; break; - case 2: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x0f; break; - case 3: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xff; break; - } - dst += 4; - switch ((i >> 6) & 3) - { - case 0: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x00; break; - case 1: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xf0; break; - case 2: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0x0f; break; - case 3: dst[ 0] = dst[ 1] = dst[ 2] = dst[ 3] = 0xff; break; - } - dst += 4; - } - - switch (read_dsw() & 3) - { - case 0: // 1K only :) - space.nop_readwrite(0x0400, 0xbbff); - break; - case 1: // +7K TANEX - space.install_ram(0x0400, 0x1fff,NULL); - space.nop_readwrite(0x2000, 0xbbff); - break; - default: // +7K TANEX + 40K TANRAM - space.install_ram(0x0400, 0xbbff, NULL); - break; - } - - m_timer = timer_alloc(TIMER_READ_CASSETTE); - - m_via6522_0->write_ca1(1); - m_via6522_0->write_ca2(1); - - m_via6522_0->write_pb0(1); - m_via6522_0->write_pb1(1); - m_via6522_0->write_pb2(1); - m_via6522_0->write_pb3(1); - m_via6522_0->write_pb4(1); - m_via6522_0->write_pb5(1); - m_via6522_0->write_pb6(1); - m_via6522_0->write_pb7(1); - m_via6522_0->write_cb1(1); - m_via6522_0->write_cb2(1); - - m_via6522_1->write_pa0(1); - m_via6522_1->write_pa1(1); - m_via6522_1->write_pa2(1); - m_via6522_1->write_pa3(1); - m_via6522_1->write_pa4(1); - m_via6522_1->write_pa5(1); - m_via6522_1->write_pa6(1); - m_via6522_1->write_pa7(1); - m_via6522_1->write_ca1(1); - m_via6522_1->write_ca2(1); - - m_via6522_1->write_pb0(1); - m_via6522_1->write_pb1(1); - m_via6522_1->write_pb2(1); - m_via6522_1->write_pb3(1); - m_via6522_1->write_pb4(1); - m_via6522_1->write_pb5(1); - m_via6522_1->write_pb6(1); - m_via6522_1->write_pb7(1); - m_via6522_1->write_cb1(1); - m_via6522_1->write_cb2(1); -} - -void microtan_state::machine_reset() -{ - int i; - static const char *const keynames[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7", "ROW8" }; - - for (i = 1; i < 10; i++) - { - m_keyrows[i] = ioport(keynames[i-1])->read(); - } - set_led_status(machine(), 1, (m_keyrows[3] & 0x80) ? 0 : 1); -} - -int microtan_state::microtan_verify_snapshot(UINT8 *data, int size) -{ - if (size == 8263) - { - logerror("microtan_snapshot_id: magic size %d found\n", size); - return IMAGE_VERIFY_PASS; - } - else - { - if (4 + data[2] + 256 * data[3] + 1 + 16 + 16 + 16 + 1 + 1 + 16 + 16 + 64 + 7 == size) - { - logerror("microtan_snapshot_id: header RAM size + structures matches filesize %d\n", size); - return IMAGE_VERIFY_PASS; - } - } - - return IMAGE_VERIFY_FAIL; -} - -int microtan_state::parse_intel_hex(UINT8 *snapshot_buff, char *src) -{ - char line[128]; - int /*row = 0,*/ column = 0, last_addr = 0, last_size = 0; - - while (*src) - { - if (*src == '\r' || *src == '\n') - { - if (column) - { - unsigned int size, addr, null, b[32], cs, n; - - line[column] = '\0'; - /*row++;*/ - n = sscanf(line, ":%02x%04x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", - &size, &addr, &null, - &b[ 0], &b[ 1], &b[ 2], &b[ 3], &b[ 4], &b[ 5], &b[ 6], &b[ 7], - &b[ 8], &b[ 9], &b[10], &b[11], &b[12], &b[13], &b[14], &b[15], - &b[16], &b[17], &b[18], &b[19], &b[20], &b[21], &b[22], &b[23], - &b[24], &b[25], &b[26], &b[27], &b[28], &b[29], &b[30], &b[31], - &cs); - if (n == 0) - { - logerror("parse_intel_hex: malformed line [%s]\n", line); - } - else if (n == 1) - { - logerror("parse_intel_hex: only size found [%s]\n", line); - } - else if (n == 2) - { - logerror("parse_intel_hex: only size and addr found [%s]\n", line); - } - else if (n == 3) - { - logerror("parse_intel_hex: only size, addr and null found [%s]\n", line); - } - else - if (null != 0) - { - logerror("parse_intel_hex: warning null byte is != 0 [%s]\n", line); - } - else - { - int i, sum; - - n -= 3; - - sum = size + (addr & 0xff) + ((addr >> 8) & 0xff); - if (n != 32 + 1) - cs = b[n-1]; - - last_addr = addr; - last_size = n-1; - logerror("parse_intel_hex: %04X", addr); - for (i = 0; i < n-1; i++) - { - sum += b[i]; - snapshot_buff[addr++] = b[i]; - } - logerror("-%04X checksum %02X+%02X = %02X\n", addr-1, cs, sum & 0xff, (cs + sum) & 0xff); - } - } - column = 0; - } - else - { - line[column++] = *src; - } - src++; - } - /* register preset? */ - if (last_size == 7) - { - logerror("parse_intel_hex: registers (?) at %04X\n", last_addr); - memcpy(&snapshot_buff[8192+64], &snapshot_buff[last_addr], last_size); - } - return IMAGE_INIT_PASS; -} - -int microtan_state::parse_zillion_hex(UINT8 *snapshot_buff, char *src) -{ - char line[128]; - int parsing = 0, /*row = 0,*/ column = 0; - - while (*src) - { - if (parsing) - { - if (*src == '}') - parsing = 0; - else - { - if (*src == '\r' || *src == '\n') - { - if (column) - { - unsigned int addr, b[8], n; - - line[column] = '\0'; - /*row++;*/ - n = sscanf(line, "%x %x %x %x %x %x %x %x %x", &addr, &b[0], &b[1], &b[2], &b[3], &b[4], &b[5], &b[6], &b[7]); - if (n == 0) - { - logerror("parse_zillion_hex: malformed line [%s]\n", line); - } - else if (n == 1) - { - logerror("parse_zillion_hex: only addr found [%s]\n", line); - } - else - { - int i; - - logerror("parse_zillion_hex: %04X", addr); - for (i = 0; i < n-1; i++) - snapshot_buff[addr++] = b[i]; - logerror("-%04X\n", addr-1); - } - } - column = 0; - } - else - { - line[column++] = *src; - } - } - } - else - { - if (*src == '\r' || *src == '\n') - { - if (column) - { - int addr, n; - - /*row++;*/ - line[column] = '\0'; - n = sscanf(line, "G%x", (unsigned int *) &addr); - if (n == 1 && !snapshot_buff[8192+64+0] && !snapshot_buff[8192+64+1]) - { - logerror("microtan_hexfile_init: go addr %04X\n", addr); - snapshot_buff[8192+64+0] = addr & 0xff; - snapshot_buff[8192+64+1] = (addr >> 8) & 0xff; - } - } - column = 0; - } - else - { - line[column++] = *src; - } - if (*src == '{') - { - parsing = 1; - column = 0; - } - } - src++; - } - return IMAGE_INIT_PASS; -} - -void microtan_state::microtan_set_cpu_regs(const UINT8 *snapshot_buff, int base) -{ - logerror("microtan_snapshot_copy: PC:%02X%02X P:%02X A:%02X X:%02X Y:%02X SP:1%02X", - snapshot_buff[base+1], snapshot_buff[base+0], snapshot_buff[base+2], snapshot_buff[base+3], - snapshot_buff[base+4], snapshot_buff[base+5], snapshot_buff[base+6]); - m_maincpu->set_state_int(M6502_PC, snapshot_buff[base+0] + 256 * snapshot_buff[base+1]); - m_maincpu->set_state_int(M6502_P, snapshot_buff[base+2]); - m_maincpu->set_state_int(M6502_A, snapshot_buff[base+3]); - m_maincpu->set_state_int(M6502_X, snapshot_buff[base+4]); - m_maincpu->set_state_int(M6502_Y, snapshot_buff[base+5]); - m_maincpu->set_state_int(M6502_S, snapshot_buff[base+6]); -} - -void microtan_state::microtan_snapshot_copy(UINT8 *snapshot_buff, int snapshot_size) -{ - UINT8 *RAM = memregion("maincpu")->base(); - address_space &space = m_maincpu->space(AS_PROGRAM); - ay8910_device *ay8910 = machine().device<ay8910_device>("ay8910.1"); - - /* check for .DMP file format */ - if (snapshot_size == 8263) - { - int i, base; - /********** DMP format - * Lower 8k of RAM (0000 to 1fff) - * 64 bytes of chunky graphics bits (first byte bit is for character at 0200, bit 1=0201, etc) - * 7 bytes of CPU registers (PCL, PCH, PSW, A, IX, IY, SP) - */ - logerror("microtan_snapshot_copy: magic size %d found, assuming *.DMP format\n", snapshot_size); - - base = 0; - /* 8K of RAM from 0000 to 1fff */ - memcpy(RAM, &snapshot_buff[base], 8192); - base += 8192; - /* 64 bytes of chunky graphics info */ - for (i = 0; i < 32*16; i++) - { - m_chunky_buffer[i] = (snapshot_buff[base+i/8] >> (i&7)) & 1; - } - base += 64; - microtan_set_cpu_regs(snapshot_buff, base); - } - else - { - int i, ramend, base; - /********** M65 format ************************************ - * 2 bytes: File version - * 2 bytes: RAM size - * n bytes: RAM (0000 to RAM Size) - * 16 bytes: 1st 6522 (0xbfc0 to 0xbfcf) - * 16 bytes: 2ns 6522 (0xbfe0 to 0xbfef) - * 16 bytes: Microtan IO (0xbff0 to 0xbfff) - * 1 byte : Invaders sound (0xbc04) - * 1 byte : Chunky graphics state (0=off, 1=on) - * 16 bytes: 1st AY8910 registers - * 16 bytes: 2nd AY8910 registers - * 64 bytes: Chunky graphics bits (first byte bit 0 is for character at 0200, bit 1=0201, etc) - * 7 bytes: CPU registers (PCL, PCH, PSW, A, IX, IY, SP) - */ - ramend = snapshot_buff[2] + 256 * snapshot_buff[3]; - if (2 + 2 + ramend + 1 + 16 + 16 + 16 + 1 + 1 + 16 + 16 + 64 + 7 != snapshot_size) - { - logerror("microtan_snapshot_copy: size %d doesn't match RAM size %d + structure size\n", snapshot_size, ramend+1); - return; - } - - logerror("microtan_snapshot_copy: size %d found, assuming *.M65 format\n", snapshot_size); - base = 4; - memcpy(RAM, &snapshot_buff[base], snapshot_buff[2] + 256 * snapshot_buff[3] + 1); - base += ramend + 1; - - /* first set of VIA6522 registers */ - for (i = 0; i < 16; i++ ) - m_via6522_0->write(space, i, snapshot_buff[base++]); - - /* second set of VIA6522 registers */ - for (i = 0; i < 16; i++ ) - m_via6522_1->write(space, i, snapshot_buff[base++]); - - /* microtan IO bff0-bfff */ - for (i = 0; i < 16; i++ ) - { - RAM[0xbff0+i] = snapshot_buff[base++]; - if (i < 4) - microtan_bffx_w(space, i, RAM[0xbff0+i]); - } - - microtan_sound_w(space, 0, snapshot_buff[base++]); - m_chunky_graphics = snapshot_buff[base++]; - - /* first set of AY8910 registers */ - for (i = 0; i < 16; i++ ) - { - ay8910->address_w(generic_space(), 0, i); - ay8910->data_w(generic_space(), 0, snapshot_buff[base++]); - } - - /* second set of AY8910 registers */ - for (i = 0; i < 16; i++ ) - { - ay8910->address_w(generic_space(), 0, i); - ay8910->data_w(generic_space(), 0, snapshot_buff[base++]); - } - - for (i = 0; i < 32*16; i++) - { - m_chunky_buffer[i] = (snapshot_buff[base+i/8] >> (i&7)) & 1; - } - base += 64; - - microtan_set_cpu_regs(snapshot_buff, base); - } -} - -SNAPSHOT_LOAD_MEMBER( microtan_state, microtan ) -{ - UINT8 *snapshot_buff; - - snapshot_buff = (UINT8*)image.ptr(); - if (!snapshot_buff) - return IMAGE_INIT_FAIL; - - if (microtan_verify_snapshot(snapshot_buff, snapshot_size)==IMAGE_VERIFY_FAIL) - return IMAGE_INIT_FAIL; - - microtan_snapshot_copy(snapshot_buff, snapshot_size); - return IMAGE_INIT_PASS; -} - -QUICKLOAD_LOAD_MEMBER( microtan_state, microtan ) -{ - int snapshot_size = 8263; /* magic size */ - dynamic_buffer snapshot_buff(snapshot_size, 0); - std::vector<char> buff(quickload_size + 1); - int rc; - - image.fread(&buff[0], quickload_size); - - buff[quickload_size] = '\0'; - - if (buff[0] == ':') - rc = parse_intel_hex(&snapshot_buff[0], &buff[0]); - else - rc = parse_zillion_hex(&snapshot_buff[0], &buff[0]); - if (rc == IMAGE_INIT_PASS) - microtan_snapshot_copy(&snapshot_buff[0], snapshot_size); - return rc; -} |