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Diffstat (limited to 'src/mess/machine/microtan.c')
-rw-r--r--src/mess/machine/microtan.c855
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diff --git a/src/mess/machine/microtan.c b/src/mess/machine/microtan.c
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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;
-}