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-rw-r--r--src/mess/machine/c65.c1336
1 files changed, 0 insertions, 1336 deletions
diff --git a/src/mess/machine/c65.c b/src/mess/machine/c65.c
index 8060f05c54c..8b137891791 100644
--- a/src/mess/machine/c65.c
+++ b/src/mess/machine/c65.c
@@ -1,1337 +1 @@
-/***************************************************************************
- commodore c65 home computer
- peter.trauner@jk.uni-linz.ac.at
- documention
- www.funet.fi
- ***************************************************************************/
-#include "emu.h"
-
-#include "includes/c65.h"
-#include "cpu/m6502/m4510.h"
-#include "sound/mos6581.h"
-#include "machine/mos6526.h"
-#include "bus/cbmiec/cbmiec.h"
-#include "machine/ram.h"
-#include "video/vic4567.h"
-#include "imagedev/cassette.h"
-#include "crsshair.h"
-#include "formats/cbm_tap.h"
-
-#define VERBOSE_LEVEL 0
-#define DBG_LOG( MACHINE, N, M, A ) \
- do { \
- if(VERBOSE_LEVEL >= N) \
- { \
- if( M ) \
- logerror("%11.6f: %-24s", MACHINE.time().as_double(), (char*) M ); \
- logerror A; \
- } \
- } while (0)
-
-
-
-/***********************************************
-
- Input Reading - Common Components
-
-***********************************************/
-
-/* These are needed by c64, c65 and c128, each machine has also additional specific
-components in its INTERRUPT_GEN */
-
-/* keyboard lines */
-UINT8 c64_keyline[10];
-
-void cbm_common_init(void)
-{
- int i;
-
- for (i = 0; i < ARRAY_LENGTH(c64_keyline); i++)
- c64_keyline[i] = 0xff;
-}
-
-static TIMER_CALLBACK( lightpen_tick )
-{
- if (((machine.root_device().ioport("CTRLSEL")->read() & 0x07) == 0x04) || ((machine.root_device().ioport("CTRLSEL")->read() & 0x07) == 0x06))
- {
- /* enable lightpen crosshair */
- crosshair_set_screen(machine, 0, CROSSHAIR_SCREEN_ALL);
- }
- else
- {
- /* disable lightpen crosshair */
- crosshair_set_screen(machine, 0, CROSSHAIR_SCREEN_NONE);
- }
-}
-
-void cbm_common_interrupt( device_t *device )
-{
- int value, i;
- int controller1 = device->machine().root_device().ioport("CTRLSEL")->read() & 0x07;
- int controller2 = device->machine().root_device().ioport("CTRLSEL")->read() & 0x70;
- static const char *const c64ports[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7" };
-
- /* Lines 0-7 : common keyboard */
- for (i = 0; i < 8; i++)
- {
- value = 0xff;
- value &= ~device->machine().root_device().ioport(c64ports[i])->read();
-
- /* Shift Lock is mapped on Left Shift */
- if ((i == 1) && (device->machine().root_device().ioport("SPECIAL")->read() & 0x40))
- value &= ~0x80;
-
- c64_keyline[i] = value;
- }
-
-
- value = 0xff;
- switch(controller1)
- {
- case 0x00:
- value &= ~device->machine().root_device().ioport("JOY1_1B")->read(); /* Joy1 Directions + Button 1 */
- break;
-
- case 0x01:
- if (device->machine().root_device().ioport("OTHER")->read() & 0x40) /* Paddle2 Button */
- value &= ~0x08;
- if (device->machine().root_device().ioport("OTHER")->read() & 0x80) /* Paddle1 Button */
- value &= ~0x04;
- break;
-
- case 0x02:
- if (device->machine().root_device().ioport("OTHER")->read() & 0x02) /* Mouse Button Left */
- value &= ~0x10;
- if (device->machine().root_device().ioport("OTHER")->read() & 0x01) /* Mouse Button Right */
- value &= ~0x01;
- break;
-
- case 0x03:
- value &= ~(device->machine().root_device().ioport("JOY1_2B")->read() & 0x1f); /* Joy1 Directions + Button 1 */
- break;
-
- case 0x04:
-/* was there any input on the lightpen? where is it mapped? */
-// if (device->machine().root_device().ioport("OTHER")->read() & 0x04) /* Lightpen Signal */
-// value &= ?? ;
- break;
-
- case 0x07:
- break;
-
- default:
- logerror("Invalid Controller 1 Setting %d\n", controller1);
- break;
- }
-
- c64_keyline[8] = value;
-
-
- value = 0xff;
- switch(controller2)
- {
- case 0x00:
- value &= ~device->machine().root_device().ioport("JOY2_1B")->read(); /* Joy2 Directions + Button 1 */
- break;
-
- case 0x10:
- if (device->machine().root_device().ioport("OTHER")->read() & 0x10) /* Paddle4 Button */
- value &= ~0x08;
- if (device->machine().root_device().ioport("OTHER")->read() & 0x20) /* Paddle3 Button */
- value &= ~0x04;
- break;
-
- case 0x20:
- if (device->machine().root_device().ioport("OTHER")->read() & 0x02) /* Mouse Button Left */
- value &= ~0x10;
- if (device->machine().root_device().ioport("OTHER")->read() & 0x01) /* Mouse Button Right */
- value &= ~0x01;
- break;
-
- case 0x30:
- value &= ~(device->machine().root_device().ioport("JOY2_2B")->read() & 0x1f); /* Joy2 Directions + Button 1 */
- break;
-
- case 0x40:
-/* was there any input on the lightpen? where is it mapped? */
-// if (device->machine().root_device().ioport("OTHER")->read() & 0x04) /* Lightpen Signal */
-// value &= ?? ;
- break;
-
- case 0x70:
- break;
-
- default:
- logerror("Invalid Controller 2 Setting %d\n", controller2);
- break;
- }
-
- c64_keyline[9] = value;
-
-// vic2_frame_interrupt does nothing so this is not necessary
-// vic2_frame_interrupt (device);
-
- /* check if lightpen has been chosen as input: if so, enable crosshair */
- device->machine().scheduler().timer_set(attotime::zero, FUNC(lightpen_tick));
-
- set_led_status (device->machine(), 1, device->machine().root_device().ioport("SPECIAL")->read() & 0x40 ? 1 : 0); /* Shift Lock */
- set_led_status (device->machine(), 0, device->machine().root_device().ioport("CTRLSEL")->read() & 0x80 ? 1 : 0); /* Joystick Swap */
-}
-
-
-/***********************************************
-
- CIA Common Handlers
-
-***********************************************/
-
-/* These are shared by c64, c65 and c128. c65 and c128 also have additional specific
-components (to select/read additional keyboard lines) */
-
-/*
- * CIA 0 - Port A
- * bits 7-0 keyboard line select
- * bits 7,6: paddle select( 01 port a, 10 port b)
- * bit 4: joystick a fire button
- * bits 3,2: Paddles port a fire button
- * bits 3-0: joystick a direction
- *
- * CIA 0 - Port B
- * bits 7-0: keyboard raw values
- * bit 4: joystick b fire button, lightpen select
- * bits 3,2: paddle b fire buttons (left,right)
- * bits 3-0: joystick b direction
- *
- * flag cassette read input, serial request in
- * irq to irq connected
- */
-
-UINT8 cbm_common_cia0_port_a_r( device_t *device, UINT8 output_b )
-{
- UINT8 value = 0xff;
-
- if (!(output_b & 0x80))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x80)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x80)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x80)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x80)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x80)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x80)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x80)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x80)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x40))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x40)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x40)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x40)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x40)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x40)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x40)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x40)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x40)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x20))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x20)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x20)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x20)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x20)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x20)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x20)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x20)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x20)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x10))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x10)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x10)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x10)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x10)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x10)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x10)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x10)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x10)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x08))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x08)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x08)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x08)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x08)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x08)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x08)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x08)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x08)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x04))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x04)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x04)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x04)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x04)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x04)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x04)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x04)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x04)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x02))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x02)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x02)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x02)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x02)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x02)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x02)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x02)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x02)) t &= ~0x01;
- value &= t;
- }
-
- if (!(output_b & 0x01))
- {
- UINT8 t = 0xff;
- if (!(c64_keyline[7] & 0x01)) t &= ~0x80;
- if (!(c64_keyline[6] & 0x01)) t &= ~0x40;
- if (!(c64_keyline[5] & 0x01)) t &= ~0x20;
- if (!(c64_keyline[4] & 0x01)) t &= ~0x10;
- if (!(c64_keyline[3] & 0x01)) t &= ~0x08;
- if (!(c64_keyline[2] & 0x01)) t &= ~0x04;
- if (!(c64_keyline[1] & 0x01)) t &= ~0x02;
- if (!(c64_keyline[0] & 0x01)) t &= ~0x01;
- value &= t;
- }
-
- if ( device->machine().root_device().ioport("CTRLSEL")->read() & 0x80 )
- value &= c64_keyline[8];
- else
- value &= c64_keyline[9];
-
- return value;
-}
-
-UINT8 cbm_common_cia0_port_b_r( device_t *device, UINT8 output_a )
-{
- UINT8 value = 0xff;
-
- if (!(output_a & 0x80)) value &= c64_keyline[7];
- if (!(output_a & 0x40)) value &= c64_keyline[6];
- if (!(output_a & 0x20)) value &= c64_keyline[5];
- if (!(output_a & 0x10)) value &= c64_keyline[4];
- if (!(output_a & 0x08)) value &= c64_keyline[3];
- if (!(output_a & 0x04)) value &= c64_keyline[2];
- if (!(output_a & 0x02)) value &= c64_keyline[1];
- if (!(output_a & 0x01)) value &= c64_keyline[0];
-
- if ( device->machine().root_device().ioport("CTRLSEL")->read() & 0x80 )
- value &= c64_keyline[9];
- else
- value &= c64_keyline[8];
-
- return value;
-}
-
-
-/***********************************************
-
- CBM Cartridges
-
-***********************************************/
-
-
-/* All the cartridge specific code has been moved
- to machine/ drivers. Once more informations
- surface about the cart expansions for systems
- in c65.c, c128.c, cbmb.c and pet.c, the shared
- code could be refactored to have here the
- common functions */
-
-
-
-/***********************************************
-
- CBM Datasette Tapes
-
-***********************************************/
-
-#if 0
-const cassette_interface cbm_cassette_interface =
-{
- cbm_cassette_formats,
- NULL,
- (cassette_state) (CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED),
- NULL
-};
-#endif
-
-
-/*UINT8 *c65_basic; */
-/*UINT8 *c65_kernal; */
-/*UINT8 *c65_dos; */
-/*UINT8 *c65_monitor; */
-/*UINT8 *c65_graphics; */
-
-
-void c65_state::c65_nmi( )
-{
- if (m_nmilevel != (ioport("SPECIAL")->read() & 0x80) || m_cia1_irq) /* KEY_RESTORE */
- {
- m_maincpu->set_input_line(INPUT_LINE_NMI, (ioport("SPECIAL")->read() & 0x80) || m_cia1_irq);
-
- m_nmilevel = (ioport("SPECIAL")->read() & 0x80) || m_cia1_irq;
- }
-}
-
-
-/***********************************************
-
- CIA Interfaces
-
-***********************************************/
-
-/*
- * CIA 0 - Port A keyboard line select
- * CIA 0 - Port B keyboard line read
- *
- * flag cassette read input, serial request in
- * irq to irq connected
- *
- * see machine/cbm.c
- */
-
-READ8_MEMBER(c65_state::c65_cia0_port_a_r)
-{
- UINT8 cia0portb = m_cia0->pb_r(space, 0);
-
- return cbm_common_cia0_port_a_r(m_cia0, cia0portb);
-}
-
-READ8_MEMBER(c65_state::c65_cia0_port_b_r)
-{
- UINT8 value = 0xff;
- UINT8 cia0porta = m_cia0->pa_r(space, 0);
-
- value &= cbm_common_cia0_port_b_r(m_cia0, cia0porta);
-
- if (!(m_6511_port & 0x02))
- value &= m_keyline;
-
- return value;
-}
-
-WRITE8_MEMBER(c65_state::c65_cia0_port_b_w)
-{
-// was there lightpen support in c65 video chip?
-// vic3_device *vic3 = machine().device<vic3_device>("vic3");
-// vic3->lightpen_write(data & 0x10);
-}
-
-void c65_state::c65_irq( int level )
-{
- if (level != m_old_level)
- {
- DBG_LOG(machine(), 3, "mos4510", ("irq %s\n", level ? "start" : "end"));
- m_maincpu->set_input_line(M4510_IRQ_LINE, level);
- m_old_level = level;
- }
-}
-
-/* is this correct for c65 as well as c64? */
-WRITE_LINE_MEMBER(c65_state::c65_cia0_interrupt)
-{
- m_cia0_irq = state;
- c65_irq(state || m_vicirq);
-}
-
-/* is this correct for c65 as well as c64? */
-WRITE_LINE_MEMBER(c65_state::c65_vic_interrupt)
-{
-#if 1
- if (state != m_vicirq)
- {
- c65_irq (state || m_cia0_irq);
- m_vicirq = state;
- }
-#endif
-}
-
-/*
- * CIA 1 - Port A
- * bit 7 serial bus data input
- * bit 6 serial bus clock input
- * bit 5 serial bus data output
- * bit 4 serial bus clock output
- * bit 3 serial bus atn output
- * bit 2 rs232 data output
- * bits 1-0 vic-chip system memory bank select
- *
- * CIA 1 - Port B
- * bit 7 user rs232 data set ready
- * bit 6 user rs232 clear to send
- * bit 5 user
- * bit 4 user rs232 carrier detect
- * bit 3 user rs232 ring indicator
- * bit 2 user rs232 data terminal ready
- * bit 1 user rs232 request to send
- * bit 0 user rs232 received data
- *
- * flag restore key or rs232 received data input
- * irq to nmi connected ?
- */
-READ8_MEMBER(c65_state::c65_cia1_port_a_r)
-{
- UINT8 value = 0xff;
-
- if (!m_iec->clk_r())
- value &= ~0x40;
-
- if (!m_iec->data_r())
- value &= ~0x80;
-
- return value;
-}
-
-WRITE8_MEMBER(c65_state::c65_cia1_port_a_w)
-{
- static const int helper[4] = {0xc000, 0x8000, 0x4000, 0x0000};
-
- m_iec->atn_w(!BIT(data, 3));
- m_iec->clk_w(!BIT(data, 4));
- m_iec->data_w(!BIT(data, 5));
-
- m_vicaddr = m_memory + helper[data & 0x03];
-}
-
-WRITE_LINE_MEMBER(c65_state::c65_cia1_interrupt)
-{
- m_cia1_irq = state;
- c65_nmi();
-}
-
-/***********************************************
-
- Memory Handlers
-
-***********************************************/
-
-/* processor has only 1 mega address space !? */
-/* and system 8 megabyte */
-/* dma controller and bankswitch hardware ?*/
-READ8_MEMBER( c65_state::c65_read_mem )
-{
- UINT8 result;
- if (offset <= 0x0ffff)
- result = m_memory[offset];
- else
- result = space.read_byte(offset);
- return result;
-}
-
-WRITE8_MEMBER( c65_state::c65_write_mem )
-{
- if (offset <= 0x0ffff)
- m_memory[offset] = data;
- else
- space.write_byte(offset, data);
-}
-
-/* dma chip at 0xd700
- used:
- writing banknumber to offset 2
- writing hibyte to offset 1
- writing lobyte to offset 0
- cpu holded, dma transfer(data at address) executed, cpu activated
-
- command data:
- 0 command (0 copy, 3 fill)
- 1,2 length
- 3,4,5 source
- 6,7,8 dest
- 9 subcommand
- 10 mod
-
- version 1:
- seldom copy (overlapping) from 0x402002 to 0x402008
- (making place for new line in basic area)
- for whats this bit 0x400000, or is this really the address?
- maybe means add counter to address for access,
- so allowing up or down copies, and reordering copies
-
- version 2:
- cmd 0x30 used for this
-*/
-void c65_state::c65_dma_port_w( int offset, int value )
-{
- PAIR pair, src, dst, len;
- UINT8 cmd, fill;
- int i;
- address_space &space = m_maincpu->space(AS_PROGRAM);
-
- switch (offset & 3)
- {
- case 2:
- case 1:
- m_dma.data[offset & 3] = value;
- break;
- case 0:
- pair.b.h3 = 0;
- pair.b.h2 = m_dma.data[2];
- pair.b.h = m_dma.data[1];
- pair.b.l = m_dma.data[0]=value;
- cmd = c65_read_mem(space, pair.d++);
- len.w.h = 0;
- len.b.l = c65_read_mem(space, pair.d++);
- len.b.h = c65_read_mem(space, pair.d++);
- src.b.h3 = 0;
- fill = src.b.l = c65_read_mem(space, pair.d++);
- src.b.h = c65_read_mem(space, pair.d++);
- src.b.h2 = c65_read_mem(space, pair.d++);
- dst.b.h3 = 0;
- dst.b.l = c65_read_mem(space, pair.d++);
- dst.b.h = c65_read_mem(space, pair.d++);
- dst.b.h2 = c65_read_mem(space, pair.d++);
-
- switch (cmd)
- {
- case 0:
- if (src.d == 0x3ffff) m_dump_dma = 1;
- if (m_dump_dma)
- DBG_LOG(space.machine(), 1,"dma copy job",
- ("len:%.4x src:%.6x dst:%.6x sub:%.2x modrm:%.2x\n",
- len.w.l, src.d, dst.d, c65_read_mem(space, pair.d),
- c65_read_mem(space, pair.d + 1) ) );
- if ((m_dma.version == 1)
- && ( (src.d&0x400000) || (dst.d & 0x400000)))
- {
- if (!(src.d & 0x400000))
- {
- dst.d &= ~0x400000;
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, dst.d--, c65_read_mem(space, src.d++));
- }
- else if (!(dst.d & 0x400000))
- {
- src.d &= ~0x400000;
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, dst.d++, c65_read_mem(space, src.d--));
- }
- else
- {
- src.d &= ~0x400000;
- dst.d &= ~0x400000;
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, --dst.d, c65_read_mem(space, --src.d));
- }
- }
- else
- {
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, dst.d++, c65_read_mem(space, src.d++));
- }
- break;
- case 3:
- DBG_LOG(space.machine(), 3,"dma fill job",
- ("len:%.4x value:%.2x dst:%.6x sub:%.2x modrm:%.2x\n",
- len.w.l, fill, dst.d, c65_read_mem(space, pair.d),
- c65_read_mem(space, pair.d + 1)));
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, dst.d++, fill);
- break;
- case 0x30:
- DBG_LOG(space.machine(), 1,"dma copy down",
- ("len:%.4x src:%.6x dst:%.6x sub:%.2x modrm:%.2x\n",
- len.w.l, src.d, dst.d, c65_read_mem(space, pair.d),
- c65_read_mem(space, pair.d + 1) ) );
- for (i = 0; i < len.w.l; i++)
- c65_write_mem(space, dst.d--,c65_read_mem(space, src.d--));
- break;
- default:
- DBG_LOG(space.machine(), 1,"dma job",
- ("cmd:%.2x len:%.4x src:%.6x dst:%.6x sub:%.2x modrm:%.2x\n",
- cmd,len.w.l, src.d, dst.d, c65_read_mem(space, pair.d),
- c65_read_mem(space, pair.d + 1)));
- }
- break;
- default:
- DBG_LOG(space.machine(), 1, "dma chip write", ("%.3x %.2x\n", offset, value));
- break;
- }
-}
-
-int c65_state::c65_dma_port_r( int offset )
-{
- /* offset 3 bit 7 in progress ? */
- DBG_LOG(machine(), 2, "dma chip read", ("%.3x\n", offset));
- return 0x7f;
-}
-
-void c65_state::c65_6511_port_w( int offset, int value )
-{
- if (offset == 7)
- {
- m_6511_port = value;
- }
- DBG_LOG(machine(), 2, "r6511 write", ("%.2x %.2x\n", offset, value));
-}
-
-int c65_state::c65_6511_port_r( int offset )
-{
- int data = 0xff;
-
- if (offset == 7)
- {
- if (ioport("SPECIAL")->read() & 0x20)
- data &= ~1;
- }
- DBG_LOG(machine(), 2, "r6511 read", ("%.2x\n", offset));
-
- return data;
-}
-
-/* one docu states custom 4191 disk controller
- (for 2 1MB MFM disk drives, 1 internal, the other extern (optional) 1565
- with integrated 512 byte buffer
-
- 0->0 reset ?
-
- 0->1, 0->0, wait until 2 positiv, 1->0 ???
-
- 0->0, 0 not 0 means no drive ???, other system entries
-
-
- reg 0 write/read
- 0,1 written
- bit 1 set
- bit 2 set
- bit 3 set
- bit 4 set
-
-
- reg 0 read
- bit 0
- bit 1
- bit 2
- 0..2 ->$1d4
-
- reg 1 write
- $01 written
- $18 written
- $46 written
- $80 written
- $a1 written
- $01 written, dec
- $10 written
-
- reg 2 read/write?(lsr)
- bit 2
- bit 4
- bit 5 busy waiting until zero, then reading reg 7
- bit 6 operation not activ flag!? or set overflow pin used
- bit 7 busy flag?
-
- reg 3 read/write?(rcr)
- bit 1
- bit 3
- bit 7 busy flag?
-
- reg 4
- track??
- 0 written
- read -> $1d2
- cmp #$50
- bcs
-
-
- reg 5
- sector ??
- 1 written
- read -> $1d3
- cmp #$b bcc
-
-
- reg 6
- head ??
- 0 written
- read -> $1d1
- cmp #2 bcc
-
- reg 7 read
- #4e written
- 12 times 0, a1 a1 a1 fe written
-
- reg 8 read
- #ff written
- 16 times #ff written
-
- reg 9
- #60 written
-
-might use the set overflow input
-
-$21a6c 9a6c format
-$21c97 9c97 write operation
-$21ca0 9ca0 get byte?
-$21cab 9cab read reg 7
-$21caf 9caf write reg 7
-$21cb3
-*/
-
-#define FDC_LOST 4
-#define FDC_CRC 8
-#define FDC_RNF 0x10
-#define FDC_BUSY 0x80
-#define FDC_IRQ 0x200
-
-#define FDC_CMD_MOTOR_SPIN_UP 0x10
-
-#if 0
-void c65_state::c65_fdc_state(void)
-{
- switch (m_fdc.state)
- {
- case FDC_CMD_MOTOR_SPIN_UP:
- if (machine().time() - m_fdc.time)
- {
- m_fdc.state = 0;
- m_fdc.status &= ~FDC_BUSY;
- }
- break;
- }
-}
-#endif
-
-void c65_state::c65_fdc_w( int offset, int data )
-{
- DBG_LOG(machine(), 1, "fdc write", ("%.5x %.2x %.2x\n", machine().device("maincpu")->safe_pc(), offset, data));
- switch (offset & 0xf)
- {
- case 0:
- m_fdc.reg[0] = data;
- break;
- case 1:
- m_fdc.reg[1] = data;
- switch (data & 0xf9)
- {
- case 0x20: // wait for motor spin up
- m_fdc.status &= ~(FDC_IRQ|FDC_LOST|FDC_CRC|FDC_RNF);
- m_fdc.status |= FDC_BUSY;
- m_fdc.time = machine().time();
- m_fdc.state = FDC_CMD_MOTOR_SPIN_UP;
- break;
- case 0: // cancel
- m_fdc.status &= ~(FDC_BUSY);
- m_fdc.state = 0;
- break;
- case 0x80: // buffered write
- case 0x40: // buffered read
- case 0x81: // unbuffered write
- case 0x41: // unbuffered read
- case 0x30:case 0x31: // step
- break;
- }
- break;
- case 2: case 3: // read only
- break;
- case 4:
- m_fdc.reg[offset & 0xf] = data;
- m_fdc.track = data;
- break;
- case 5:
- m_fdc.reg[offset & 0xf] = data;
- m_fdc.sector = data;
- break;
- case 6:
- m_fdc.reg[offset & 0xf] = data;
- m_fdc.head = data;
- break;
- case 7:
- m_fdc.buffer[m_fdc.cpu_pos++] = data;
- break;
- default:
- m_fdc.reg[offset & 0xf] = data;
- break;
- }
-}
-
-int c65_state::c65_fdc_r( int offset )
-{
- UINT8 data = 0;
- switch (offset & 0xf)
- {
- case 0:
- data = m_fdc.reg[0];
- break;
- case 1:
- data = m_fdc.reg[1];
- break;
- case 2:
- data = m_fdc.status;
- break;
- case 3:
- data = m_fdc.status >> 8;
- break;
- case 4:
- data = m_fdc.track;
- break;
- case 5:
- data = m_fdc.sector;
- break;
- case 6:
- data = m_fdc.head;
- break;
- case 7:
- data = m_fdc.buffer[m_fdc.cpu_pos++];
- break;
- default:
- data = m_fdc.reg[offset & 0xf];
- break;
- }
- DBG_LOG(machine(), 1, "fdc read", ("%.5x %.2x %.2x\n", machine().device("maincpu")->safe_pc(), offset, data));
- return data;
-}
-
-/* version 1 ramcheck
- write 0:0
- read write read write 80000,90000,f0000
- write 0:8
- read write read write 80000,90000,f0000
-
- version 2 ramcheck???
- read 0:
- write 0:0
- read 0:
- first read and second read bit 0x80 set --> nothing
- write 0:0
- read 0
- write 0:ff
-*/
-
-READ8_MEMBER( c65_state::c65_ram_expansion_r )
-{
- UINT8 data = 0xff;
- if (m_ram->size() > (128 * 1024))
- data = m_expansion_ram.reg;
- return data;
-}
-
-WRITE8_MEMBER( c65_state::c65_ram_expansion_w )
-{
- offs_t expansion_ram_begin;
- offs_t expansion_ram_end;
-
- if (m_ram->size() > (128 * 1024))
- {
- m_expansion_ram.reg = data;
-
- expansion_ram_begin = 0x80000;
- expansion_ram_end = 0x80000 + (m_ram->size() - 128*1024) - 1;
-
- if (data == 0x00) {
- space.install_readwrite_bank(expansion_ram_begin, expansion_ram_end,"bank16");
- membank("bank16")->set_base(m_ram->pointer() + 128*1024);
- } else {
- space.nop_readwrite(expansion_ram_begin, expansion_ram_end);
- }
- }
-}
-
-WRITE8_MEMBER( c65_state::c65_write_io )
-{
- mos6581_device *sid_0 = machine().device<mos6581_device>("sid_r");
- mos6581_device *sid_1 = machine().device<mos6581_device>("sid_l");
- vic3_device *vic3 = machine().device<vic3_device>("vic3");
-
- switch (offset & 0xf00)
- {
- case 0x000:
- if (offset < 0x80)
- vic3->port_w(space, offset & 0x7f, data);
- else if (offset < 0xa0)
- c65_fdc_w(offset & 0x1f, data);
- else
- {
- c65_ram_expansion_w(space, offset & 0x1f, data, mem_mask);
- /*ram expansion crtl optional */
- }
- break;
- case 0x100:
- case 0x200:
- case 0x300:
- vic3->palette_w(space, offset - 0x100, data);
- break;
- case 0x400:
- if (offset<0x420) /* maybe 0x20 */
- sid_0->write(space, offset & 0x3f, data);
- else if (offset<0x440)
- sid_1->write(space, offset & 0x3f, data);
- else
- DBG_LOG(machine(), 1, "io write", ("%.3x %.2x\n", offset, data));
- break;
- case 0x500:
- DBG_LOG(machine(), 1, "io write", ("%.3x %.2x\n", offset, data));
- break;
- case 0x600:
- c65_6511_port_w(offset & 0xff,data);
- break;
- case 0x700:
- c65_dma_port_w(offset & 0xff, data);
- break;
- }
-}
-
-WRITE8_MEMBER( c65_state::c65_write_io_dc00 )
-{
- switch (offset & 0xf00)
- {
- case 0x000:
- m_cia0->write(space, offset, data);
- break;
- case 0x100:
- m_cia1->write(space, offset, data);
- break;
- case 0x200:
- case 0x300:
- DBG_LOG(machine(), 1, "io write", ("%.3x %.2x\n", offset+0xc00, data));
- break;
- }
-}
-
-READ8_MEMBER( c65_state::c65_read_io )
-{
- mos6581_device *sid_0 = machine().device<mos6581_device>("sid_r");
- mos6581_device *sid_1 = machine().device<mos6581_device>("sid_l");
- vic3_device *vic3 = machine().device<vic3_device>("vic3");
-
- switch (offset & 0xf00)
- {
- case 0x000:
- if (offset < 0x80)
- return vic3->port_r(space, offset & 0x7f);
- if (offset < 0xa0)
- return c65_fdc_r(offset & 0x1f);
- else
- {
- return c65_ram_expansion_r(space, offset & 0x1f, mem_mask);
- /*return; ram expansion crtl optional */
- }
- case 0x100:
- case 0x200:
- case 0x300:
- /* read only !? */
- DBG_LOG(machine(), 1, "io read", ("%.3x\n", offset));
- break;
- case 0x400:
- if (offset < 0x420)
- return sid_0->read(space, offset & 0x3f);
- if (offset < 0x440)
- return sid_1->read(space, offset & 0x3f);
- DBG_LOG(machine(), 1, "io read", ("%.3x\n", offset));
- break;
- case 0x500:
- DBG_LOG(machine(), 1, "io read", ("%.3x\n", offset));
- break;
- case 0x600:
- return c65_6511_port_r(offset&0xff);
- case 0x700:
- return c65_dma_port_r(offset&0xff);
- }
- return 0xff;
-}
-
-READ8_MEMBER( c65_state::c65_read_io_dc00 )
-{
- switch (offset & 0x300)
- {
- case 0x000:
- return m_cia0->read(space, offset);
- case 0x100:
- return m_cia1->read(space, offset);
- case 0x200:
- case 0x300:
- DBG_LOG(machine(), 1, "io read", ("%.3x\n", offset+0xc00));
- break;
- }
- return 0xff;
-}
-
-
-/*
-d02f:
- init a5 96 written (seems to be switch to c65 or vic3 mode)
- go64 0 written
-*/
-
-/* bit 1 external sync enable (genlock)
- bit 2 palette enable
- bit 6 vic3 c65 character set */
-WRITE8_MEMBER(c65_state::c65_bankswitch_interface)
-{
- DBG_LOG(machine(), 2, "c65 bankswitch", ("%.2x\n",data));
-
- if (m_io_on)
- {
- if (data & 1)
- {
- membank("bank8")->set_base(m_colorram + 0x400);
- membank("bank9")->set_base(m_colorram + 0x400);
- m_maincpu->space(AS_PROGRAM).install_read_bank(0x0dc00, 0x0dfff, "bank8");
- m_maincpu->space(AS_PROGRAM).install_write_bank(0x0dc00, 0x0dfff, "bank9");
- }
- else
- {
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x0dc00, 0x0dfff, read8_delegate(FUNC(c65_state::c65_read_io_dc00),this));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x0dc00, 0x0dfff, write8_delegate(FUNC(c65_state::c65_write_io_dc00),this));
- }
- }
-
- m_io_dc00_on = !(data & 1);
-#if 0
- /* cartridge roms !?*/
- if (data & 0x08)
- membank("bank1")->set_base(m_roml);
- else
- membank("bank1")->set_base(m_memory + 0x8000);
-
- if (data & 0x10)
- membank("bank2")->set_base(m_basic);
- else
- membank("bank2")->set_base(m_memory + 0xa000);
-#endif
- if ((m_old_value^data) & 0x20)
- {
- /* bankswitching faulty when doing actual page */
- if (data & 0x20)
- membank("bank3")->set_base(m_basic);
- else
- membank("bank3")->set_base(m_memory + 0xc000);
- }
- m_charset_select = data & 0x40;
-#if 0
- /* cartridge roms !?*/
- if (data & 0x80)
- membank("bank8")->set_base(m_kernal);
- else
- membank("bank6")->set_base(m_memory + 0xe000);
-#endif
- m_old_value = data;
-}
-
-void c65_state::c65_bankswitch( )
-{
- int data, loram, hiram, charen;
-
- data = 0x00; // machine().device<m4510_device>("maincpu")->get_port();
- if (data == m_old_data)
- return;
-
- DBG_LOG(machine(), 1, "bankswitch", ("%d\n", data & 7));
- loram = (data & 1) ? 1 : 0;
- hiram = (data & 2) ? 1 : 0;
- charen = (data & 4) ? 1 : 0;
-
- if ((!m_game && m_exrom) || (loram && hiram && !m_exrom))
- membank("bank1")->set_base(m_roml);
- else
- membank("bank1")->set_base(m_memory + 0x8000);
-
- if ((!m_game && m_exrom && hiram) || (!m_exrom))
- membank("bank2")->set_base(m_romh);
- else if (loram && hiram)
- membank("bank2")->set_base(m_basic);
- else
- membank("bank2")->set_base(m_memory + 0xa000);
-
- if ((!m_game && m_exrom) || (charen && (loram || hiram)))
- {
- m_io_on = 1;
- membank("bank6")->set_base(m_colorram);
- membank("bank7")->set_base(m_colorram);
-
- if (m_io_dc00_on)
- {
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x0dc00, 0x0dfff, read8_delegate(FUNC(c65_state::c65_read_io_dc00),this));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x0dc00, 0x0dfff, write8_delegate(FUNC(c65_state::c65_write_io_dc00),this));
- }
- else
- {
- m_maincpu->space(AS_PROGRAM).install_read_bank(0x0dc00, 0x0dfff, "bank8");
- m_maincpu->space(AS_PROGRAM).install_write_bank(0x0dc00, 0x0dfff, "bank9");
- membank("bank8")->set_base(m_colorram + 0x400);
- membank("bank9")->set_base(m_colorram + 0x400);
- }
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x0d000, 0x0d7ff, read8_delegate(FUNC(c65_state::c65_read_io),this));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x0d000, 0x0d7ff, write8_delegate(FUNC(c65_state::c65_write_io),this));
- }
- else
- {
- m_io_on = 0;
- membank("bank5")->set_base(m_memory + 0xd000);
- membank("bank7")->set_base(m_memory + 0xd800);
- membank("bank9")->set_base(m_memory + 0xdc00);
- if (!charen && (loram || hiram))
- {
- membank("bank4")->set_base(m_chargen);
- membank("bank6")->set_base(m_chargen + 0x800);
- membank("bank8")->set_base(m_chargen + 0xc00);
- }
- else
- {
- membank("bank4")->set_base(m_memory + 0xd000);
- membank("bank6")->set_base(m_memory + 0xd800);
- membank("bank8")->set_base(m_memory + 0xdc00);
- }
- m_maincpu->space(AS_PROGRAM).install_read_bank(0x0d000, 0x0d7ff, "bank4");
- m_maincpu->space(AS_PROGRAM).install_write_bank(0x0d000, 0x0d7ff, "bank5");
- }
-
- if (!m_game && m_exrom)
- {
- membank("bank10")->set_base(m_romh);
- }
- else
- {
- if (hiram)
- {
- membank("bank10")->set_base(m_kernal);
- }
- else
- {
- membank("bank10")->set_base(m_memory + 0xe000);
- }
- }
- m_old_data = data;
-}
-
-#ifdef UNUSED_FUNCTION
-void c65_state::c65_colorram_write( int offset, int value )
-{
- m_colorram[offset & 0x7ff] = value | 0xf0;
-}
-#endif
-
-/*
- * only 14 address lines
- * a15 and a14 portlines
- * 0x1000-0x1fff, 0x9000-0x9fff char rom
- */
-READ8_MEMBER(c65_state::c65_dma_read)
-{
- if (!m_game && m_exrom)
- {
- if (offset < 0x3000)
- return m_memory[offset];
- return m_romh[offset & 0x1fff];
- }
- if ((m_vicaddr == m_memory) || (m_vicaddr == m_memory + 0x8000))
- {
- if (offset < 0x1000)
- return m_vicaddr[offset & 0x3fff];
- if (offset < 0x2000) {
- if (m_charset_select)
- return m_chargen[offset & 0xfff];
- else
- return m_chargen[offset & 0xfff];
- }
- return m_vicaddr[offset & 0x3fff];
- }
- return m_vicaddr[offset & 0x3fff];
-}
-
-READ8_MEMBER(c65_state::c65_dma_read_color)
-{
- if (m_c64mode)
- return m_colorram[offset & 0x3ff] & 0xf;
- return m_colorram[offset & 0x7ff];
-}
-
-void c65_state::c65_common_driver_init( )
-{
- m_memory = auto_alloc_array_clear(machine(), UINT8, 0x10000);
- membank("bank11")->set_base(m_memory + 0x00000);
- membank("bank12")->set_base(m_memory + 0x08000);
- membank("bank13")->set_base(m_memory + 0x0a000);
- membank("bank14")->set_base(m_memory + 0x0c000);
- membank("bank15")->set_base(m_memory + 0x0e000);
-
- cbm_common_init();
- m_keyline = 0xff;
-
- m_pal = 0;
- m_charset_select = 0;
- m_6511_port = 0xff;
- m_vicirq = 0;
- m_old_data = -1;
-
- /* C65 had no datasette port */
- m_tape_on = 0;
- m_game = 1;
- m_exrom = 1;
-
- /*memset(m_memory + 0x40000, 0, 0x800000 - 0x40000); */
-}
-
-DRIVER_INIT_MEMBER(c65_state,c65)
-{
- m_dma.version = 2;
- c65_common_driver_init();
-}
-
-DRIVER_INIT_MEMBER(c65_state,c65pal)
-{
- m_dma.version = 1;
- c65_common_driver_init();
- m_pal = 1;
-}
-
-MACHINE_START_MEMBER(c65_state,c65)
-{
- /* clear upper memory */
- memset(m_ram->pointer() + 128*1024, 0xff, m_ram->size() - 128*1024);
-
-//removed cbm_drive_0_config (SERIAL, 10);
-//removed cbm_drive_1_config (SERIAL, 11);
- m_vicaddr = m_memory;
-
- m_c64mode = 0;
-
- c65_bankswitch_interface(m_maincpu->space(AS_PROGRAM),0,0xff);
- c65_bankswitch();
-}
-
-
-INTERRUPT_GEN_MEMBER(c65_state::c65_frame_interrupt)
-{
- int value;
-
- c65_nmi();
-
- /* common keys input ports */
- cbm_common_interrupt(&device);
-
- /* c65 specific: function keys input ports */
- value = 0xff;
-
- value &= ~ioport("FUNCT")->read();
- m_keyline = value;
-}