// license:BSD-3-Clause
// copyright-holders:Nathan Woods,R. Belmont
/*********************************************************************
apple2gs.c
Apple IIgs code
Apple IIgs specific softswitches:
C019 - RDVBLBAR
bits 7 - set during vblank (when at scanline 192 or higher)
C022 - TBCOLOR
bits 7-4 - text foreground color
bits 3-0 - text background color
C023 - VGCINT
bit 7 - set for interrupt generated by VGC
bit 6 - set during one second interrupt
bit 5 - set during scanline interrupt
bit 4 - set during external interrupt
bit 3 - ???
bit 2 - set for interrupt every second
bit 1 - set for scanline interrupt
bit 0 - set for external interrupt
C025 - KEYMODREG (comes from ?)
bit 7 - option key pressed
bit 6 - command key presssed
bit 5 - modified latch
bit 4 - keypad key pressed
bit 3 - repeating
bit 2 - caps lock latched
bit 1 - control key pressed
bit 0 - shift key pressed
C027 - KMSTATUS (GLU system status)
bit 7 - set if mouse register full
bit 6 - mouse interrupt enable flag
bit 5 - set if data register full
bit 4 - data interrupt enabled
bit 3 - set if key data full
bit 2 - key data interurpt enabled
bit 1 - clear if horizontal mouse data, set if vertical
bit 0 - command register full
C029 - NEWVIDEO
bit 7 - 1 for Super Hi-Res mode, 0 for old Apple II video modes
bit 6 - 1 to enable memory linearization (2000-9D00 in banks 01/E1), 0 for physical layout
bit 5 - 1 to display double hi-res mode in monochrome, 0 for color
bit 4 - ???
bit 3 - ???
bit 2 - ???
bit 1 - ???
bit 0 - ???
C02D - SLTROMSEL
C031 - DISKREG
bit 7 - set to select head on 3.5" drive
bit 6 - set to enable 3.5" drive, clear to enable 5.25" drive
C035 - SHADOW
bit 7 - ???
bit 6 - set to inhibit I/O and LC operations ($C000-$FFFF)
bit 5 - ???
bit 4 - set to inhibit shadowing aux hires page
bit 3 - set to inhibit shadowing super hires video
bit 2 - set to inhibit shadowing hires page 2
bit 1 - set to inhibit shadowing hires page 2
bit 0 - set to inhibit shadowing text pages
C036 - CYAREG
bit 7 - clear for slow speed, set for hi speed
bit 6 - ???
bit 5 - ???
bit 4 - shadow in all RAM banks
bit 3 - slot 7 motor on
bit 2 - slot 6 motor on
bit 1 - slot 5 motor on
bit 0 - slot 4 motor on
C041 - INTEN
bit 4 - set to enable quarter second interrupts
bit 3 - set to enable VBL interrupts
bit 2 - set to enable Mega II mouse switch interrupts
bit 1 - set to enable Mega II mouse movement interrupts
bit 0 - set to enable Mega II mouse mouse operation
C046 - DIAGTYPE/INTFLAG
bit 7 - set if mouse button currently down
bit 6 - set if mouse button down on last read
bit 5 - set for AN3
bit 4 - set if currently in quarter second interrupt
bit 3 - set if currently in VBL interrupt
bit 2 - set if currently in Mega II mouse switch interrupt
bit 1 - set if currently in Mega II mouse movement interrupt
bit 0 - set if system IRQ line asserted
C047 - CLRVBLINT
C068 - STATEREG
bit 7 - ALTZP status
bit 6 - PAGE2 status
bit 5 - RAMRD status
bit 4 - RAMWRT status
bit 3 - !LCRAM status (inverted)
bit 2 - LCRAM2 status
bit 1 - ROMBANK status (unimplemented)
bit 0 - INTCXROM status
*********************************************************************/
#include "emu.h"
#include "includes/apple2gs.h"
#include "includes/apple2.h"
#include "machine/applefdc.h"
#include "machine/sonydriv.h"
#include "machine/8530scc.h"
#include "imagedev/flopdrv.h"
#include "cpu/g65816/g65816.h"
#include "sound/es5503.h"
#include "machine/ram.h"
#include "debugger.h"
#define LOG_C0XX 0
#define LOG_ADB 0
#define LOG_IRQ 0
/* -----------------------------------------------------------------------
* Apple IIgs clock
* ----------------------------------------------------------------------- */
void apple2gs_state::process_clock()
{
uint8_t operation;
seconds_t current_interval;
/* update clock_curtime */
current_interval = machine().time().seconds();
m_clock_curtime += current_interval - m_clock_curtime_interval;
m_clock_curtime_interval = current_interval;
switch(m_clock_mode)
{
case CLOCKMODE_IDLE:
m_clock_read = (m_clock_data >> 7);
m_clock_reg1 = (m_clock_data >> 2) & 0x03;
operation = (m_clock_data >> 4) & 0x07;
if ((m_clock_data & 0x40) == 0x00)
{
switch(operation)
{
case 0x00:
/* read/write seconds register */
m_clock_mode = CLOCKMODE_TIME;
break;
case 0x03:
/* internal registers */
if (m_clock_reg1 & 0x02)
{
m_clock_mode = CLOCKMODE_BRAM2;
m_clock_reg1 = (m_clock_data & 0x07) << 5;
}
else
{
m_clock_mode = CLOCKMODE_INTERNALREGS;
}
break;
default:
//fatalerror("NYI\n");
break;
}
}
break;
case CLOCKMODE_BRAM1:
if (m_clock_read)
m_clock_data = m_clock_bram[m_clock_reg1];
else
m_clock_bram[m_clock_reg1] = m_clock_data;
m_clock_mode = CLOCKMODE_IDLE;
break;
case CLOCKMODE_BRAM2:
m_clock_reg1 |= (m_clock_data >> 2) & 0x1F;
m_clock_mode = CLOCKMODE_BRAM1;
break;
case CLOCKMODE_INTERNALREGS:
switch (m_clock_reg1)
{
case 0x00:
/* test register */
break;
case 0x01:
/* write protect register */
break;
}
m_clock_mode = CLOCKMODE_IDLE;
break;
case CLOCKMODE_TIME:
if (m_clock_data & 0x40)
{
m_clock_data = m_clock_curtime >> (m_clock_reg1 * 8);
}
else
{
m_clock_curtime &= ~(0xFF << (m_clock_reg1 * 8));
m_clock_curtime |= m_clock_data << (m_clock_reg1 * 8);
}
m_clock_mode = CLOCKMODE_IDLE;
break;
default:
//fatalerror("NYI\n");
break;
}
}
/* -----------------------------------------------------------------------
* Interrupts
* ----------------------------------------------------------------------- */
const char *apple2gs_state::apple2gs_irq_name(uint16_t irq_mask)
{
switch(irq_mask)
{
case IRQ_KBD_SRQ: return "IRQ_KBD_SRQ";
case IRQ_ADB_DATA: return "IRQ_ADB_DATA";
case IRQ_ADB_MOUSE: return "IRQ_ADB_MOUSE";
case IRQ_VGC_SCANLINE: return "IRQ_VGC_SCANLINE";
case IRQ_VGC_SECOND: return "IRQ_VGC_SECOND";
case IRQ_INTEN_QSECOND: return "IRQ_INTEN_QSECOND";
case IRQ_INTEN_VBL: return "IRQ_INTEN_VBL";
case IRQ_DOC: return "IRQ_DOC";
case IRQ_SLOT: return "IRQ_SLOT";
}
return nullptr;
}
void apple2gs_state::apple2gs_add_irq(uint16_t irq_mask)
{
if ((m_pending_irqs & irq_mask) == 0x00)
{
if (LOG_IRQ)
logerror("apple2gs_add_irq(): adding %s\n", apple2gs_irq_name(irq_mask));
m_pending_irqs |= irq_mask;
m_maincpu->set_input_line(G65816_LINE_IRQ, m_pending_irqs ? ASSERT_LINE : CLEAR_LINE);
}
}
void apple2gs_state::apple2gs_remove_irq(uint16_t irq_mask)
{
if (m_pending_irqs & irq_mask)
{
if (LOG_IRQ)
logerror("apple2gs_remove_irq(): removing %s\n", apple2gs_irq_name(irq_mask));
m_pending_irqs &= ~irq_mask;
m_maincpu->set_input_line(G65816_LINE_IRQ, m_pending_irqs ? ASSERT_LINE : CLEAR_LINE);
}
}
WRITE_LINE_MEMBER(apple2gs_state::apple2gs_doc_irq)
{
if (state)
{
apple2gs_add_irq(IRQ_DOC);
}
else
{
apple2gs_remove_irq(IRQ_DOC);
}
}
/* Clock interrupt */
TIMER_CALLBACK_MEMBER(apple2gs_state::apple2gs_clock_tick)
{
if ((m_vgcint & 0x04) && !(m_vgcint & 0x40))
{
m_vgcint |= 0xc0;
apple2gs_add_irq(IRQ_VGC_SECOND);
}
}
/* Quarter-second interrupt */
TIMER_CALLBACK_MEMBER(apple2gs_state::apple2gs_qsecond_tick)
{
if ((m_inten & 0x10) && !(m_intflag & 0x10))
{
m_intflag |= 0x10;
apple2gs_add_irq(IRQ_INTEN_QSECOND);
}
}
/* -----------------------------------------------------------------------
* ADB
* ----------------------------------------------------------------------- */
#if !RUN_ADB_MICRO
uint8_t apple2gs_state::adb_read_memory(uint32_t address)
{
if (address < ARRAY_LENGTH(m_adb_memory))
return m_adb_memory[address];
else
return 0x00;
}
void apple2gs_state::adb_write_memory(uint32_t address, uint8_t data)
{
if (address < ARRAY_LENGTH(m_adb_memory))
m_adb_memory[address] = data;
}
void apple2gs_state::adb_set_mode(uint8_t mode)
{
m_adb_mode = mode;
}
void apple2gs_state::adb_set_config(uint8_t b1, uint8_t b2, uint8_t b3)
{
/* ignore for now */
}
void apple2gs_state::adb_post_response(const uint8_t *bytes, size_t length)
{
assert(length < ARRAY_LENGTH(m_adb_response_bytes));
memcpy(m_adb_response_bytes, bytes, length);
m_adb_state = ADBSTATE_INRESPONSE;
m_adb_response_length = length;
m_adb_response_pos = 0;
}
void apple2gs_state::adb_post_response_1(uint8_t b)
{
adb_post_response(&b, 1);
}
void apple2gs_state::adb_post_response_2(uint8_t b1, uint8_t b2)
{
uint8_t b[2];
b[0] = b1;
b[1] = b2;
adb_post_response(b, 2);
}
void apple2gs_state::adb_do_command()
{
int device;
uint32_t address;
uint8_t val;
m_adb_state = ADBSTATE_IDLE;
if (LOG_ADB)
logerror("adb_do_command(): adb_command=0x%02x\n", m_adb_command);
switch(m_adb_command)
{
case 0x00: /* ??? */
break;
case 0x03: /* flush keyboard buffer */
break;
case 0x04: /* set modes */
adb_set_mode(m_adb_mode | m_adb_command_bytes[0]);
break;
case 0x05: /* clear modes */
adb_set_mode(m_adb_mode & ~m_adb_command_bytes[0]);
break;
case 0x06: /* set config */
adb_set_config(m_adb_command_bytes[0], m_adb_command_bytes[1], m_adb_command_bytes[2]);
break;
case 0x07: /* synchronize */
adb_set_mode(m_adb_command_bytes[0]);
adb_set_config(m_adb_command_bytes[1], m_adb_command_bytes[2], m_adb_command_bytes[3]);
break;
case 0x08: /* write memory */
address = m_adb_command_bytes[0];
val = m_adb_command_bytes[1];
adb_write_memory(address, val);
break;
case 0x09: /* read memory */
address = (m_adb_command_bytes[1] << 8) | m_adb_command_bytes[0];
adb_post_response_1(adb_read_memory(address));
break;
case 0x0a: /* ??? */
case 0x0b: /* ??? */
break;
case 0x0d: /* get version */
adb_post_response_1(0x06);
break;
case 0x0e: /* read available charsets */
adb_post_response_2(0x01, 0x00);
break;
case 0x0f: /* read available layouts */
adb_post_response_2(0x01, 0x00);
break;
case 0x12: /* mystery command 0x12 */
case 0x13: /* mystery command 0x13 */
break;
case 0xb0: case 0xb1: case 0xb2: case 0xb3:
case 0xb4: case 0xb5: case 0xb6: case 0xb7:
case 0xb8: case 0xb9: case 0xba: case 0xbb:
case 0xbc: case 0xbd: case 0xbe: case 0xbf:
/* send data to device */
device = m_adb_command & 0x0f;
if (device == m_adb_address_keyboard)
{
}
else if (device == m_adb_address_mouse)
{
}
break;
case 0xf2:
break;
default:
fatalerror("ADB command 0x%02x unimplemented\n", m_adb_command);
}
m_adb_kmstatus |= 0x20;
}
uint8_t apple2gs_state::adb_read_datareg()
{
uint8_t result;
switch(m_adb_state)
{
case ADBSTATE_INRESPONSE:
result = m_adb_response_bytes[m_adb_response_pos++];
if (m_adb_response_pos >= m_adb_response_length)
{
m_adb_state = ADBSTATE_IDLE;
m_adb_latent_result = result;
m_adb_kmstatus &= ~0x20;
}
break;
default:
result = 0; //m_adb_latent_result & 0x7f;
break;
}
if (LOG_ADB)
logerror("adb_read_datareg(): result=0x%02x\n", result);
return result;
}
void apple2gs_state::adb_write_datareg(uint8_t data)
{
if (LOG_ADB)
logerror("adb_write_datareg(): data=0x%02x\n", data);
switch(m_adb_state)
{
case ADBSTATE_IDLE:
m_adb_command = data;
m_adb_command_length = 0;
m_adb_command_pos = 0;
// printf("ADB command %02x\n", data);
switch(data)
{
case 0x00: /* ??? */
case 0x01: /* abort */
/* do nothing for now */
break;
case 0x03: /* flush keyboard buffer */
m_adb_command_length = 0;
break;
case 0x04: /* set modes */
case 0x05: /* clear modes */
m_adb_command_length = 1;
break;
case 0x06: /* set config */
m_adb_command_length = 3;
break;
case 0x07: /* synchronize */
if (m_is_rom3)
m_adb_command_length = 8; // ROM 3 has 8 bytes: mode byte, 3 config bytes, kbd/mouse params, disk eject options
else
m_adb_command_length = 4; // ROM 0/1 has 4 bytes sync
break;
case 0x08: /* write memory */
case 0x09: /* read memory */
m_adb_command_length = 2;
break;
case 0x0a: /* ??? */
case 0x0b: /* ??? */
m_adb_command_length = 0;
break;
case 0x0d: /* get version */
m_adb_command_length = 0;
break;
case 0x0e: /* read available charsets */
m_adb_command_length = 0;
m_adb_state = ADBSTATE_INCOMMAND; /* HACK */
break;
case 0x0f: /* read available layouts */
m_adb_command_length = 0;
m_adb_state = ADBSTATE_INCOMMAND; /* HACK */
break;
case 0x12: /* mystery command 0x12 */
case 0x13: /* mystery command 0x13 */
m_adb_command_length = 2;
break;
case 0x70: /* disable SRQ device 0 */
case 0x71: /* disable SRQ device 1 */
case 0x72: /* disable SRQ device 2 */
case 0x73: /* disable SRQ device 3 */
/* ignore for now */
break;
case 0xb0: case 0xb1: case 0xb2: case 0xb3:
case 0xb4: case 0xb5: case 0xb6: case 0xb7:
case 0xb8: case 0xb9: case 0xba: case 0xbb:
case 0xbc: case 0xbd: case 0xbe: case 0xbf:
/* send data to device */
m_adb_command_length = 2;
break;
case 0xf2:
break;
default:
fatalerror("ADB command 0x%02x unimplemented\n", data);
}
if (m_adb_command_length > 0)
{
m_adb_state = ADBSTATE_INCOMMAND;
if (LOG_ADB)
logerror("adb_write_datareg(): in command length %u\n", (unsigned) m_adb_command_length);
}
break;
case ADBSTATE_INCOMMAND:
assert(m_adb_command_pos < ARRAY_LENGTH(m_adb_command_bytes));
// printf("ADB param %02x\n", data);
m_adb_command_bytes[m_adb_command_pos++] = data;
break;
case ADBSTATE_INRESPONSE:
m_adb_state = ADBSTATE_IDLE;
break;
}
/* do command if necessary */
if ((m_adb_state == ADBSTATE_INCOMMAND) && (m_adb_command_pos >= m_adb_command_length))
adb_do_command();
}
// real rom 3 h/w reads 0x90 when idle, 0x98 when key pressed
// current MESS reads back 0xb0 when idle
uint8_t apple2gs_state::adb_read_kmstatus()
{
return m_adb_kmstatus;
}
void apple2gs_state::adb_write_kmstatus(uint8_t data)
{
m_adb_kmstatus &= ~0x54;
m_adb_kmstatus |= data & 0x54;
}
uint8_t apple2gs_state::adb_read_mousedata()
{
uint8_t result = 0x00;
uint8_t absolute;
int8_t delta;
if (m_adb_kmstatus & 0x80) // mouse register full
{
if (m_adb_kmstatus & 0x02) // H/V mouse data select
{
absolute = m_mouse_y;
delta = m_mouse_dy;
m_adb_kmstatus &= ~0x82;
apple2gs_remove_irq(IRQ_ADB_MOUSE);
}
else
{
absolute = m_mouse_x;
delta = m_mouse_dx;
m_adb_kmstatus |= 0x02;
}
if (delta > 63)
delta = 63;
else if (delta < -64)
delta = -64;
result = (absolute & 0x80) | (delta & 0x7F);
}
return result;
}
int8_t apple2gs_state::seven_bit_diff(uint8_t v1, uint8_t v2)
{
v1 -= v2;
if (v1 & 0x40)
v1 |= 0x80;
else
v1 &= ~0x80;
return v1;
}
void apple2gs_state::adb_check_mouse()
{
uint8_t new_mouse_x, new_mouse_y;
/* read mouse values */
if ((m_adb_kmstatus & 0x80) == 0x00)
{
new_mouse_x = m_adb_mousex->read();
new_mouse_y = m_adb_mousey->read();
if ((m_mouse_x != new_mouse_x) || (m_mouse_y != new_mouse_y))
{
m_mouse_dx = seven_bit_diff(new_mouse_x, m_mouse_x);
m_mouse_dy = seven_bit_diff(new_mouse_y, m_mouse_y);
m_mouse_x = new_mouse_x;
m_mouse_y = new_mouse_y;
m_adb_kmstatus |= 0x80;
m_adb_kmstatus &= ~0x02;
if (m_adb_kmstatus & 0x40)
apple2gs_add_irq(IRQ_ADB_MOUSE);
}
}
}
#endif
void apple2gs_state::apple2gs_set_scanint(uint8_t data)
{
/* second interrupt */
if ((m_vgcint & 0x40) && !(data & 0x40))
{
apple2gs_remove_irq(IRQ_VGC_SECOND);
m_vgcint &= ~0xC0;
}
/* scanline interrupt */
if ((m_vgcint & 0x20) && !(data & 0x20))
{
apple2gs_remove_irq(IRQ_VGC_SCANLINE);
m_vgcint &= ~0xA0;
}
if (m_pending_irqs & (IRQ_VGC_SECOND | IRQ_VGC_SCANLINE))
m_vgcint |= 0x80;
}
TIMER_CALLBACK_MEMBER(apple2gs_state::apple2gs_scanline_tick)
{
int scanline;
scanline = m_screen->vpos();
m_screen->update_partial(scanline);
/* check scanline interrupt bits if we're in super hi-res and the current scanline is within the active display area */
if ((m_newvideo & 0x80) && (scanline >= (BORDER_TOP-1)) && (scanline < (200+BORDER_TOP-1)))
{
uint8_t scb;
scb = m_slowmem[0x19D00 + scanline - BORDER_TOP + 1];
if (scb & 0x40)
{
// scanline int flag is set even when the actual interrupt is disabled
m_vgcint |= 0x20;
// see if the interrupt is also enabled and trigger it if so
if (m_vgcint & 0x02)
{
m_vgcint |= 0x80;
apple2gs_add_irq(IRQ_VGC_SCANLINE);
}
}
}
if (scanline == (192+BORDER_TOP))
{
/* VBL interrupt */
if ((m_inten & 0x08) && !(m_intflag & 0x08))
{
m_intflag |= 0x08;
apple2gs_add_irq(IRQ_INTEN_VBL);
}
}
/* check the mouse status */
if ((scanline % 8) == 0)
{
#if !RUN_ADB_MICRO
adb_check_mouse();
#endif
/* call Apple II interrupt handler */
if ((m_screen->vpos() % 8) == 7)
{
//apple2_interrupt(m_maincpu);
/* TODO: check me! */
m_screen->update_partial(m_screen->vpos());
}
}
m_scanline_timer->adjust(m_screen->time_until_pos((scanline+1)%262, 0));
}
/* -----------------------------------------------------------------------
* Sound handlers
* ----------------------------------------------------------------------- */
READ8_MEMBER( apple2gs_state::gssnd_r )
{
uint8_t ret = 0;
switch (offset)
{
case 0: // control
ret = m_sndglu_ctrl;
break;
case 1: // data read
ret = m_sndglu_dummy_read;
if (m_sndglu_ctrl & 0x40) // docram access
{
uint8_t *docram = memregion("es5503")->base();
m_sndglu_dummy_read = docram[m_sndglu_addr];
}
else
{
m_sndglu_dummy_read = m_es5503->read(space, m_sndglu_addr);
}
if (m_sndglu_ctrl & 0x20) // auto-increment
{
m_sndglu_addr++;
}
break;
case 2: // addr l
ret = m_sndglu_addr & 0xff;
break;
case 3: // addr h
ret = (m_sndglu_addr >> 8) & 0xff;
break;
}
return ret;
}
WRITE8_MEMBER( apple2gs_state::gssnd_w )
{
switch (offset)
{
case 0: // control
m_sndglu_ctrl = data & 0x7f; // make sure DOC is never busy
if (!(m_sndglu_ctrl & 0x40)) // clear hi byte of address pointer on DOC access
{
m_sndglu_addr &= 0xff;
}
break;
case 1: // data write
if (m_sndglu_ctrl & 0x40) // docram access
{
uint8_t *docram = memregion("es5503")->base();
docram[m_sndglu_addr] = data;
}
else
{
m_es5503->write(space, m_sndglu_addr, data);
}
if (m_sndglu_ctrl & 0x20) // auto-increment
{
m_sndglu_addr++;
}
break;
case 2: // addr l
m_sndglu_addr &= 0xff00;
m_sndglu_addr |= data;
break;
case 3: // addr h
m_sndglu_addr &= 0x00ff;
m_sndglu_addr |= data<<8;
break;
}
}
/* -----------------------------------------------------------------------
* IO handlers
* ----------------------------------------------------------------------- */
// apple2gs_get_vpos - return the correct vertical counter value for the current scanline,
// keeping borders in mind.
int apple2gs_state::apple2gs_get_vpos()
{
int result, scan;
static const uint8_t top_border_vert[BORDER_TOP] =
{
0xfa, 0xfa, 0xfa, 0xfa, 0xfb, 0xfb, 0xfb, 0xfb,
0xfc, 0xfc, 0xfc, 0xfd, 0xfd, 0xfe, 0xfe, 0xff,
};
scan = m_screen->vpos();
if (scan < BORDER_TOP)
{
result = top_border_vert[scan];
}
else
{
result = scan - BORDER_TOP + 0x100 + 1;
}
return result;
}
READ8_MEMBER( apple2gs_state::apple2gs_c0xx_r )
{
uint8_t result;
if(machine().side_effects_disabled())
{
return 0;
}
offset &= 0xFF;
switch(offset)
{
#if RUN_ADB_MICRO
case 0x00: /* C000 - KEYDATA */
result = keyglu_816_read(GLU_C000);
break;
case 0x10: /* C010 - KBDSTRB */
result = keyglu_816_read(GLU_C010);
break;
#endif
case 0x19: /* C019 - RDVBLBAR */
result = (m_screen->vpos() >= (192+BORDER_TOP)) ? 0x80 : 0x00;
break;
case 0x22: /* C022 - TBCOLOR */
result = (m_fgcolor << 4) | m_bgcolor;
break;
case 0x23: /* C023 - VGCINT */
result = m_vgcint;
break;
case 0x24: /* C024 - MOUSEDATA */
#if RUN_ADB_MICRO
result = keyglu_816_read(GLU_MOUSEX);
#else
result = adb_read_mousedata();
#endif
break;
case 0x25: /* C025 - KEYMODREG */
#if RUN_ADB_MICRO
result = keyglu_816_read(GLU_KEYMOD);
#else
result = 0;
{
uint8_t temp = m_kbspecial->read();
if (temp & 1) // capslock
{
result |= 4;
}
if (temp & 6) // shift
{
result |= 1;
}
if (temp & 8) // control
{
result |= 2;
}
if (temp & 0x10) // open apple/command
{
result |= 0x40;
}
if (temp & 0x20) // option
{
result |= 0x80;
}
// keypad is a little rough right now
if (m_lastchar >= 0x28 && m_lastchar <= 0x2d)
{
result |= 0x10;
}
else if (m_lastchar >= 0x32 && m_lastchar <= 0x3f)
{
result |= 0x10;
}
else if (m_lastchar >= 0x100 && m_lastchar <= 0x101)
{
result |= 0x10;
}
else if (m_lastchar >= 0x109 && m_lastchar <= 0x10a)
{
result |= 0x10;
}
}
#endif
break;
case 0x26: /* C026 - DATAREG */
#if RUN_ADB_MICRO
result = keyglu_816_read(GLU_DATA);
#else
result = adb_read_datareg();
#endif
break;
case 0x27: /* C027 - KMSTATUS */
#if RUN_ADB_MICRO
result = keyglu_816_read(GLU_SYSSTAT);
#else
result = adb_read_kmstatus();
#endif
break;
case 0x29: /* C029 - NEWVIDEO */
result = m_newvideo;
break;
case 0x2B: /* C02B - LANGSEL */
result = m_langsel;
break;
case 0x2D: /* C02D - SLTROMSEL */
result = m_sltromsel;
break;
case 0x2E: /* C02E - VERTCNT */
result = apple2gs_get_vpos() >> 1;
break;
case 0x2F: /* C02F - HORIZCNT */
result = m_screen->hpos() / 11;
if (result > 0)
{
result += 0x40;
}
if (apple2gs_get_vpos() & 1)
{
result |= 0x80;
}
break;
case 0x31: /* C031 - DISKREG */
result = m_fdc_diskreg;
break;
case 0x33: /* C033 - CLOCKDATA */
result = m_clock_data;
break;
case 0x34: /* C034 - CLOCKCTL */
result = m_clock_control;
break;
case 0x35: /* C035 - SHADOW */
result = m_shadow;
break;
case 0x36: /* C036 - CYAREG */
result = m_cyareg;
break;
case 0x38: /* C038 - SCCBREG */
result = m_scc->cb_r(space, 0, mem_mask);
break;
case 0x39: /* C039 - SCCAREG */
result = m_scc->ca_r(space, 0, mem_mask);
break;
case 0x3A: /* C03A - SCCBDATA */
result = m_scc->db_r(space, 0, mem_mask);
break;
case 0x3B: /* C03B - SCCADATA */
result = m_scc->da_r(space, 0, mem_mask);
break;
case 0x3C: /* C03C - SOUNDCTL */
case 0x3D: /* C03D - SOUNDDATA */
case 0x3E: /* C03E - SOUNDADRL */
case 0x3F: /* C03F - SOUNDADRH */
result = gssnd_r(space, offset & 0x03, mem_mask);
break;
case 0x41: /* C041 - INTEN */
result = m_inten;
break;
case 0x46: /* C046 - INTFLAG */
result = m_intflag;
break;
case 0x68: /* C068 - STATEREG */
result = ((m_flags & VAR_ALTZP) ? 0x80 : 0x00)
| ((m_flags & VAR_PAGE2) ? 0x40 : 0x00)
| ((m_flags & VAR_RAMRD) ? 0x20 : 0x00)
| ((m_flags & VAR_RAMWRT) ? 0x10 : 0x00)
| ((m_flags & VAR_LCRAM) ? 0x00 : 0x08)
| ((m_flags & VAR_LCRAM2) ? 0x04 : 0x00)
| ((m_flags & VAR_INTCXROM)? 0x01 : 0x00);
break;
case 0x71: case 0x72: case 0x73:
case 0x74: case 0x75: case 0x76: case 0x77:
case 0x78: case 0x79: case 0x7a: case 0x7b:
case 0x7c: case 0x7d: case 0x7e: case 0x7f:
offset |= (memregion("maincpu")->bytes() - 1) & ~0x3FFF;
result = m_rom[offset];
break;
case 0x21: /* C021 - MONOCOLOR */
case 0x2C: /* C02C - CHARROM */
result = 0x00;
break;
// slot 6 registers should go to applefdc if slot 6 not "Your Card"
case 0xe0: case 0xe1: case 0xe2: case 0xe3: case 0xe4: case 0xe5: case 0xe6: case 0xe7:
case 0xe8: case 0xe9: case 0xea: case 0xeb: case 0xec: case 0xed: case 0xee: case 0xef:
if ((m_sltromsel & (1 << 6)) == 0)
{
result = m_fdc->read(offset);
}
else
{
result = apple2_c0xx_r(space, offset, 0);
}
break;
default:
if (offset < 0x80)
{
result = apple2_c0xx_r(space, offset, 0);
}
else
{
result = apple2_c080_r(space, offset, 0);
}
break;
}
if (LOG_C0XX)
logerror("apple2gs_c0xx_r(): offset=0x%02x result=0x%02x\n", offset, result);
return result;
}
WRITE8_MEMBER( apple2gs_state::apple2gs_c0xx_w )
{
offset &= 0xFF;
if (LOG_C0XX)
logerror("apple2gs_c0xx_w(): offset=0x%02x data=0x%02x\n", offset, data);
switch(offset)
{
#if RUN_ADB_MICRO
case 0x10:
break;
#endif
case 0x22: /* C022 - TBCOLOR */
m_fgcolor = (data >> 4) & 0x0F;
m_bgcolor = (data >> 0) & 0x0F;
break;
case 0x23: /* C023 - VGCINT */
m_vgcint &= ~0x0F;
m_vgcint |= data & 0x0F;
break;
case 0x24: /* C024 - MOUSEDATA */
case 0x25: /* C025 - KEYMODREG */
case 0x28: /* C028 - ROMBANK */
case 0x2C: /* C02C - CHARROM */
case 0x2E: /* C02E - VERTCNT */
case 0x2F: /* C02F - HORIZCNT */
/* ignore these writes */
break;
case 0x26: /* C026 - DATAREG */
#if RUN_ADB_MICRO
keyglu_816_write(GLU_COMMAND, data);
#else
adb_write_datareg(data);
#endif
break;
case 0x27: /* C027 - KMSTATUS */
#if RUN_ADB_MICRO
keyglu_816_write(GLU_SYSSTAT, data);
#else
adb_write_kmstatus(data);
#endif
break;
case 0x29: /* C029 - NEWVIDEO */
m_newvideo = data;
break;
case 0x2B: /* C02B - LANGSEL */
m_langsel = data;
break;
case 0x2D: /* C02D - SLTROMSEL */
m_sltromsel = data;
apple2_update_memory();
break;
case 0x31: /* C031 - DISKREG */
apple2_iwm_setdiskreg(data);
break;
case 0x32: /* C032 - SCANINT */
apple2gs_set_scanint(data);
break;
case 0x33: /* C033 - CLOCKDATA */
m_clock_data = data;
break;
case 0x34: /* C034 - CLOCKCTL */
m_clock_control = data & 0x7F;
m_bordercolor = data & 0x0F;
if (data & 0x80)
process_clock();
break;
case 0x35: /* C035 - SHADOW */
if (m_shadow != data)
{
m_shadow = data;
apple2_update_memory();
}
break;
case 0x36: /* C036 - CYAREG */
m_cyareg = data & ~0x20;
m_maincpu->set_unscaled_clock((data & 0x80) ? APPLE2GS_14M/5 : APPLE2GS_7M/7);
break;
case 0x38: /* C038 - SCCBREG */
m_scc->cb_w(space, 0, data);
break;
case 0x39: /* C039 - SCCAREG */
m_scc->ca_w(space, 0, data);
break;
case 0x3A: /* C03A - SCCBDATA */
m_scc->db_w(space, 0, data);
break;
case 0x3B: /* C03B - SCCADATA */
m_scc->da_w(space, 0, data);
break;
case 0x3C: /* C03C - SOUNDCTL */
case 0x3D: /* C03D - SOUNDDATA */
case 0x3E: /* C03E - SOUNDADRL */
case 0x3F: /* C03F - SOUNDADRH */
gssnd_w(space, offset & 0x03, data, mem_mask);
break;
case 0x41: /* C041 - INTEN */
m_inten = data & 0x1F;
if ((m_inten & 0x10) == 0x00)
apple2gs_remove_irq(IRQ_INTEN_QSECOND);
if ((m_inten & 0x08) == 0x00)
apple2gs_remove_irq(IRQ_INTEN_VBL);
break;
case 0x47: /* C047 - CLRVBLINT */
m_intflag &= ~0x18;
apple2gs_remove_irq(IRQ_INTEN_QSECOND);
apple2gs_remove_irq(IRQ_INTEN_VBL);
break;
case 0x68: /* C068 - STATEREG */
apple2_setvar(
((data & 0x80) ? VAR_ALTZP : 0) |
((data & 0x40) ? VAR_PAGE2 : 0) |
((data & 0x20) ? VAR_RAMRD : 0) |
((data & 0x10) ? VAR_RAMWRT : 0) |
((data & 0x08) ? 0 : VAR_LCRAM) |
((data & 0x04) ? VAR_LCRAM2 : 0) |
((data & 0x01) ? VAR_INTCXROM : 0),
VAR_ALTZP | VAR_PAGE2 | VAR_RAMRD | VAR_RAMWRT | VAR_LCRAM | VAR_LCRAM2 | VAR_INTCXROM);
break;
// slot 6 registers should go to applefdc if slot 6 not "Your Card"
case 0xe0: case 0xe1: case 0xe2: case 0xe3: case 0xe4: case 0xe5: case 0xe6: case 0xe7:
case 0xe8: case 0xe9: case 0xea: case 0xeb: case 0xec: case 0xed: case 0xee: case 0xef:
if ((m_sltromsel & (1 << 6)) == 0)
{
m_fdc->write(offset, data);
}
else
{
apple2_c0xx_w(space, offset, data, 0);
}
break;
default:
if (offset < 0x80)
{
apple2_c0xx_w(space, offset, data, 0);
}
else
{
apple2_c080_w(space, offset, data, 0);
}
break;
}
}
/* -----------------------------------------------------------------------
* Memory management
* ----------------------------------------------------------------------- */
WRITE8_MEMBER( apple2gs_state::apple2gs_main0400_w )
{
offset += 0x000400;
m_rambase[offset] = data;
if (!(m_shadow & 0x01))
{
m_slowmem[offset] = data;
}
}
WRITE8_MEMBER( apple2gs_state::apple2gs_aux0400_w )
{
offset += 0x010400;
m_rambase[offset] = data;
if (!(m_shadow & 0x01))
{
m_slowmem[offset] = data;
}
}
WRITE8_MEMBER( apple2gs_state::apple2gs_main2000_w )
{
offset += 0x002000;
m_rambase[offset] = data;
if (!(m_shadow & 0x02))
{
m_slowmem[offset] = data;
}
}
WRITE8_MEMBER( apple2gs_state::apple2gs_aux2000_w )
{
offset += 0x012000;
m_rambase[offset] = data;
if (!(m_shadow & 0x12) || !(m_shadow & 0x08))
{
m_slowmem[offset] = data;
}
}
WRITE8_MEMBER( apple2gs_state::apple2gs_main4000_w )
{
offset += 0x004000;
m_rambase[offset] = data;
if ((offset >= 0x004000) && (offset <= 0x005FFF))
{
if (!(m_shadow & 0x04))
m_slowmem[offset] = data;
}
}
WRITE8_MEMBER( apple2gs_state::apple2gs_aux4000_w )
{
offset += 0x014000;
m_rambase[offset] = data;
if ((offset >= 0x014000) && (offset <= 0x015FFF))
{
if (!(m_shadow & 0x14) || !(m_shadow & 0x08))
m_slowmem[offset] = data;
}
else if ((offset >= 0x016000) && (offset <= 0x019FFF))
{
if (!(m_shadow & 0x08))
{
m_slowmem[offset] = data;
if (offset >= 0x19e00)
{
int color = (offset - 0x19e00) >> 1;
m_shr_palette[color] = rgb_t(
((m_slowmem[0x19E00 + (color * 2) + 1] >> 0) & 0x0F) * 17,
((m_slowmem[0x19E00 + (color * 2) + 0] >> 4) & 0x0F) * 17,
((m_slowmem[0x19E00 + (color * 2) + 0] >> 0) & 0x0F) * 17);
}
}
}
}
static void apple2gs_mem_000000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
meminfo->read_mem = (state->m_flags & VAR_ALTZP) ? 0x010000 : 0x000000;
meminfo->write_mem = (state->m_flags & VAR_ALTZP) ? 0x010000 : 0x000000;
}
static void apple2gs_mem_000200(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x010200 : 0x000200;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x010200 : 0x000200;
}
static void apple2gs_mem_000400(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_flags & VAR_80STORE)
{
meminfo->read_mem = (state->m_flags & VAR_PAGE2) ? 0x010400 : 0x000400;
meminfo->write_mem = (state->m_flags & VAR_PAGE2) ? 0x010400 : 0x000400;
meminfo->write_handler = (state->m_flags & VAR_PAGE2) ? &state->write_delegates_2gs0400[0] : &state->write_delegates_2gs0400[1];
}
else
{
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x010400 : 0x000400;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x010400 : 0x000400;
meminfo->write_handler = (state->m_flags & VAR_RAMWRT) ? &state->write_delegates_2gs0400[0] : &state->write_delegates_2gs0400[1];
}
}
static void apple2gs_mem_000800(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x010800 : 0x000800;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x010800 : 0x000800;
}
static void apple2gs_mem_002000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if ((state->m_flags & (VAR_80STORE|VAR_HIRES)) == (VAR_80STORE|VAR_HIRES))
{
meminfo->read_mem = (state->m_flags & VAR_PAGE2) ? 0x012000 : 0x002000;
meminfo->write_mem = (state->m_flags & VAR_PAGE2) ? 0x012000 : 0x002000;
meminfo->write_handler = (state->m_flags & VAR_PAGE2) ? &state->write_delegates_2gs2000[0] : &state->write_delegates_2gs2000[1];
}
else
{
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x012000 : 0x002000;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x012000 : 0x002000;
meminfo->write_handler = (state->m_flags & VAR_RAMWRT) ? &state->write_delegates_2gs2000[0] : &state->write_delegates_2gs2000[1];
}
}
static void apple2gs_mem_004000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x014000 : 0x004000;
meminfo->write_handler = (state->m_flags & VAR_RAMWRT) ? &state->write_delegates_2gs4000[0] : &state->write_delegates_2gs4000[1];
}
static void apple2gs_mem_xxD000(running_machine &machine,apple2_meminfo *meminfo, uint32_t lcmem)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_flags & VAR_LCRAM)
{
if (state->m_flags & VAR_LCRAM2)
meminfo->read_mem = lcmem | 0x00C000;
else
meminfo->read_mem = lcmem | 0x00D000;
}
else
{
meminfo->read_mem = 0x03D000 | APPLE2_MEM_ROM;
}
if (state->m_flags & VAR_LCWRITE)
{
if (state->m_flags & VAR_LCRAM2)
meminfo->write_mem = lcmem | 0x00C000;
else
meminfo->write_mem = lcmem | 0x00D000;
}
else
{
meminfo->write_mem = APPLE2_MEM_FLOATING;
}
}
static void apple2gs_mem_xxE000(running_machine &machine,apple2_meminfo *meminfo, uint32_t lcmem)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_flags & VAR_LCRAM)
meminfo->read_mem = lcmem | 0x00E000;
else
meminfo->read_mem = 0x03E000 | APPLE2_MEM_ROM;
if (state->m_flags & VAR_LCWRITE)
meminfo->write_mem = lcmem | 0x00E000;
else
meminfo->write_mem = APPLE2_MEM_FLOATING;
}
static void apple2gs_mem_00D000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_shadow & 0x40)
{
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x01D000 : 0x00D000;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x01D000 : 0x00D000;
}
else
{
apple2gs_mem_xxD000(machine,meminfo, (state->m_flags & VAR_ALTZP) ? 0x010000 : 0x000000);
}
}
static void apple2gs_mem_00E000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_shadow & 0x40)
{
meminfo->read_mem = (state->m_flags & VAR_RAMRD) ? 0x01E000 : 0x00E000;
meminfo->write_mem = (state->m_flags & VAR_RAMWRT) ? 0x01E000 : 0x00E000;
}
else
{
apple2gs_mem_xxE000(machine,meminfo, (state->m_flags & VAR_ALTZP) ? 0x010000 : 0x000000);
}
}
static void apple2gs_mem_01D000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_shadow & 0x40)
{
meminfo->read_mem = 0x01D000;
meminfo->write_mem = 0x01D000;
}
else
{
apple2gs_mem_xxD000(machine,meminfo, 0x010000);
}
}
static void apple2gs_mem_01E000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_state *state = machine.driver_data<apple2gs_state>();
if (state->m_shadow & 0x40)
{
meminfo->read_mem = 0x01E000;
meminfo->write_mem = 0x01E000;
}
else
{
apple2gs_mem_xxE000(machine,meminfo, 0x010000);
}
}
static void apple2gs_mem_E0D000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_mem_xxD000(machine,meminfo, 0x000000 | APPLE2_MEM_AUX);
}
static void apple2gs_mem_E0E000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_mem_xxE000(machine,meminfo, 0x000000 | APPLE2_MEM_AUX);
}
static void apple2gs_mem_E1D000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_mem_xxD000(machine,meminfo, 0x010000 | APPLE2_MEM_AUX);
}
static void apple2gs_mem_E1E000(running_machine &machine,offs_t begin, offs_t end, apple2_meminfo *meminfo)
{
apple2gs_mem_xxE000(machine,meminfo, 0x010000 | APPLE2_MEM_AUX);
}
static const apple2_memmap_entry apple2gs_memmap_entries[] =
{
{ 0x000000, 0x0001FF, apple2gs_mem_000000, A2MEM_MONO },
{ 0x000200, 0x0003FF, apple2gs_mem_000200, A2MEM_DUAL },
{ 0x000400, 0x0007FF, apple2gs_mem_000400, A2MEM_DUAL },
{ 0x000800, 0x001FFF, apple2gs_mem_000800, A2MEM_DUAL },
{ 0x002000, 0x003FFF, apple2gs_mem_002000, A2MEM_DUAL },
{ 0x004000, 0x00BFFF, apple2gs_mem_004000, A2MEM_DUAL },
{ 0x00D000, 0x00DFFF, apple2gs_mem_00D000, A2MEM_DUAL },
{ 0x00E000, 0x00FFFF, apple2gs_mem_00E000, A2MEM_DUAL },
{ 0x01D000, 0x01DFFF, apple2gs_mem_01D000, A2MEM_DUAL },
{ 0x01E000, 0x01FFFF, apple2gs_mem_01E000, A2MEM_DUAL },
{ 0xE0D000, 0xE0DFFF, apple2gs_mem_E0D000, A2MEM_DUAL },
{ 0xE0E000, 0xE0FFFF, apple2gs_mem_E0E000, A2MEM_DUAL },
{ 0xE1D000, 0xE1DFFF, apple2gs_mem_E1D000, A2MEM_DUAL },
{ 0xE1E000, 0xE1FFFF, apple2gs_mem_E1E000, A2MEM_DUAL },
{ 0 }
};
uint8_t *apple2gs_state::apple2gs_getslotmem(offs_t address)
{
uint8_t *rom;
address %= 0x00FFFF;
assert(address >= 0xC000);
assert(address <= 0xCFFF);
rom = m_rom;
rom += 0x030000 % memregion("maincpu")->bytes();
return &rom[address];
}
uint8_t apple2gs_state::apple2gs_xxCxxx_r(address_space &space, offs_t address)
{
uint8_t result;
int slot;
if ((m_shadow & 0x40) && ((address & 0xF00000) == 0x000000)) // shadow all banks and C0xx?
{
result = m_ram->pointer()[address];
}
else if ((address & 0x000F00) == 0x000000) // accessing C0xx?
{
result = apple2gs_c0xx_r(m_maincpu->space(AS_PROGRAM), address, 0);
}
else
{
device_a2bus_card_interface *slotdevice;
slot = (address & 0x000F00) / 0x100;
if (slot <= 7) // slots 1-7, it's the slot
{
slotdevice = m_a2bus->get_a2bus_card(slot);
// is this slot internal or "Your Card"?
if ((m_sltromsel & (1 << slot)) == 0)
{
// accessing a slot mapped to internal, let's put back the internal ROM
m_a2_cnxx_slot = -1;
apple2_update_memory();
result = *apple2gs_getslotmem(address);
}
else
{
// accessing a slot mapped to "Your Card", C800 should belong to that card
if (slotdevice != nullptr)
{
if (slotdevice->take_c800())
{
m_a2_cnxx_slot = slot;
apple2_update_memory();
}
result = slotdevice->read_cnxx(address&0xff);
}
else
{
result = apple2_getfloatingbusvalue();
}
}
}
else // C800-CFFF, not cards
{
slotdevice = nullptr;
// if CFFF accessed, reset C800 area to internal ROM
if(!machine().side_effects_disabled())
{
if ((address & 0xfff) == 0xfff)
{
m_a2_cnxx_slot = -1;
apple2_update_memory();
}
}
if ( m_a2_cnxx_slot >= 0 && m_a2_cnxx_slot <= 7 )
{
slotdevice = m_a2bus->get_a2bus_card(m_a2_cnxx_slot);
}
if (slotdevice)
{
result = slotdevice->read_c800(address&0x7ff);
}
else
{
result = *apple2gs_getslotmem(address);
}
}
}
return result;
}
void apple2gs_state::apple2gs_xxCxxx_w(address_space &space, offs_t address, uint8_t data)
{
int slot;
// if CFFF accessed, reset C800 area to internal ROM
if(!machine().side_effects_disabled())
{
if ((address & 0xfff) == 0xfff)
{
m_a2_cnxx_slot = -1;
apple2_update_memory();
}
}
if ((m_shadow & 0x40) && ((address & 0xF00000) == 0x000000))
{
m_ram->pointer()[address] = data;
}
else if ((address & 0x000F00) == 0x000000)
{
apple2gs_c0xx_w(m_maincpu->space(AS_PROGRAM), address, data, 0);
}
else
{
device_a2bus_card_interface *slotdevice;
slot = (address & 0x000F00) / 0x100;
if (slot <= 7) // slots 1-7, it's the slot
{
slotdevice = m_a2bus->get_a2bus_card(slot);
// is this slot internal or "Your Card"?
if ((m_sltromsel & (1 << slot)) == 0)
{
// accessing a slot mapped to internal, let's put back the internal ROM
m_a2_cnxx_slot = -1;
apple2_update_memory();
*apple2gs_getslotmem(address) = data;
}
else
{
// accessing a slot mapped to "Your Card", C800 should belong to that card if it can take it
if (slotdevice != nullptr)
{
if (slotdevice->take_c800())
{
m_a2_cnxx_slot = slot;
apple2_update_memory();
}
slotdevice->write_cnxx(address&0xff, data);
}
// (else slot is your card but there's no card inserted so the write goes nowhere)
}
}
else // C800-CFFF, not cards
{
slotdevice = nullptr;
// if CFFF accessed, reset C800 area to internal ROM
if ((address & 0xfff) == 0xfff)
{
m_a2_cnxx_slot = -1;
apple2_update_memory();
}
if ( m_a2_cnxx_slot >= 0 && m_a2_cnxx_slot <= 7 )
{
slotdevice = m_a2bus->get_a2bus_card(m_a2_cnxx_slot);
}
if (slotdevice)
{
slotdevice->write_c800(address&0x7ff, data);
}
else
{
*apple2gs_getslotmem(address) = data;
}
}
}
}
READ8_MEMBER( apple2gs_state::apple2gs_00Cxxx_r ) { return apple2gs_xxCxxx_r(space, offset | 0x00C000); }
READ8_MEMBER( apple2gs_state::apple2gs_01Cxxx_r ) { return apple2gs_xxCxxx_r(space, offset | 0x01C000); }
READ8_MEMBER( apple2gs_state::apple2gs_E0Cxxx_r ) { return apple2gs_xxCxxx_r(space, offset | 0xE0C000); }
READ8_MEMBER( apple2gs_state::apple2gs_E1Cxxx_r ) { return apple2gs_xxCxxx_r(space, offset | 0xE1C000); }
WRITE8_MEMBER( apple2gs_state::apple2gs_00Cxxx_w ) { apple2gs_xxCxxx_w(space, offset | 0x00C000, data); }
WRITE8_MEMBER( apple2gs_state::apple2gs_01Cxxx_w ) { apple2gs_xxCxxx_w(space, offset | 0x01C000, data); }
WRITE8_MEMBER( apple2gs_state::apple2gs_E0Cxxx_w ) { apple2gs_xxCxxx_w(space, offset | 0xE0C000, data); }
WRITE8_MEMBER( apple2gs_state::apple2gs_E1Cxxx_w ) { apple2gs_xxCxxx_w(space, offset | 0xE1C000, data); }
WRITE8_MEMBER( apple2gs_state::apple2gs_Exxxxx_w )
{
m_slowmem[offset] = data;
}
WRITE8_MEMBER( apple2gs_state::apple2gs_E004xx_w ) { apple2gs_Exxxxx_w(space, offset + 0x00400, data, mem_mask); }
WRITE8_MEMBER( apple2gs_state::apple2gs_E02xxx_w ) { apple2gs_Exxxxx_w(space, offset + 0x02000, data, mem_mask); }
WRITE8_MEMBER( apple2gs_state::apple2gs_E104xx_w ) { apple2gs_Exxxxx_w(space, offset + 0x10400, data, mem_mask); }
WRITE8_MEMBER( apple2gs_state::apple2gs_E12xxx_w ) { apple2gs_Exxxxx_w(space, offset + 0x12000, data, mem_mask); }
WRITE8_MEMBER( apple2gs_state::apple2gs_slowmem_w )
{
m_slowmem[offset] = data;
if ((offset >= 0x19e00) && (offset < 0x19fff))
{
int color = (offset - 0x19e00) >> 1;
m_shr_palette[color] = rgb_t(
((m_slowmem[0x19E00 + (color * 2) + 1] >> 0) & 0x0F) * 17,
((m_slowmem[0x19E00 + (color * 2) + 0] >> 4) & 0x0F) * 17,
((m_slowmem[0x19E00 + (color * 2) + 0] >> 0) & 0x0F) * 17);
}
}
// Because the bank address multiplexes on the 65816 data bus, reading a memory area
// which doesn't drive the bus results in reading back the bank number.
READ8_MEMBER(apple2gs_state::apple2gs_bank_echo_r)
{
return m_echo_bank + (offset>>16);
}
void apple2gs_state::apple2gs_setup_memory()
{
address_space& space = m_maincpu->space(AS_PROGRAM);
offs_t begin, end;
apple2_memmap_config cfg;
/* allocate memory for E00000-E1FFFF */
m_slowmem = make_unique_clear<uint8_t[]>(128*1024);
save_pointer(m_slowmem.get(), "APPLE2GS_SLOWMEM", 128*1024);
// install expanded memory
// fair warning: other code assumes banks 0 and 1 are the first 128k of the RAM device, so you must install bank 1 at 0x10000
// otherwise nothing works :)
if (m_is_rom3)
{
int ramsize = m_ram->size();
// ROM 03 hardware: the quoted "1 MB" for a base machine doesn't include banks e0/e1, so map accordingly
space.install_readwrite_bank(0x010000, ramsize - 1, "bank1");
membank("bank1")->set_base(m_ram->pointer() + 0x010000);
space.install_read_handler( ramsize, 0xdfffff, read8_delegate(FUNC(apple2gs_state::apple2gs_bank_echo_r),this));
m_echo_bank = (ramsize >> 16);
}
else
{
int ramsize = m_ram->size()-0x30000;
// ROM 00/01 hardware: the quoted "256K" for a base machine *does* include banks e0/e1.
space.install_readwrite_bank(0x010000, ramsize - 1 + 0x10000, "bank1");
membank("bank1")->set_base(m_ram->pointer() + 0x010000);
space.install_read_handler( ramsize + 0x10000, 0xdfffff, read8_delegate(FUNC(apple2gs_state::apple2gs_bank_echo_r),this));
m_echo_bank = (ramsize+0x10000) >> 16;
}
/* install hi memory */
space.install_read_bank(0xe00000, 0xe1ffff, "bank2");
space.install_write_handler(0xe00000, 0xe1ffff, write8_delegate(FUNC(apple2gs_state::apple2gs_slowmem_w),this));
space.install_write_handler(0xe00400, 0xe007ff, write8_delegate(FUNC(apple2gs_state::apple2gs_E004xx_w),this));
space.install_write_handler(0xe02000, 0xe03fff, write8_delegate(FUNC(apple2gs_state::apple2gs_E02xxx_w),this));
space.install_write_handler(0xe10400, 0xe107ff, write8_delegate(FUNC(apple2gs_state::apple2gs_E104xx_w),this));
space.install_write_handler(0xe12000, 0xe13fff, write8_delegate(FUNC(apple2gs_state::apple2gs_E12xxx_w),this));
membank("bank2")->set_base(m_slowmem.get());
/* install alternate ROM bank */
begin = 0x1000000 - memregion("maincpu")->bytes();
end = 0xffffff;
space.install_read_bank(begin, end, "bank3");
membank("bank3")->set_base(m_rom);
/* install new xxC000-xxCFFF handlers */
space.install_read_handler(0x00c000, 0x00cfff, read8_delegate(FUNC(apple2gs_state::apple2gs_00Cxxx_r),this));
space.install_write_handler(0x00c000, 0x00cfff, write8_delegate(FUNC(apple2gs_state::apple2gs_00Cxxx_w),this));
space.install_read_handler(0x01c000, 0x01cfff, read8_delegate(FUNC(apple2gs_state::apple2gs_01Cxxx_r),this));
space.install_write_handler(0x01c000, 0x01cfff, write8_delegate(FUNC(apple2gs_state::apple2gs_01Cxxx_w),this));
space.install_read_handler(0xe0c000, 0xe0cfff, read8_delegate(FUNC(apple2gs_state::apple2gs_E0Cxxx_r),this));
space.install_write_handler(0xe0c000, 0xe0cfff, write8_delegate(FUNC(apple2gs_state::apple2gs_E0Cxxx_w),this));
space.install_read_handler(0xe1c000, 0xe1cfff, read8_delegate(FUNC(apple2gs_state::apple2gs_E1Cxxx_r),this));
space.install_write_handler(0xe1c000, 0xe1cfff, write8_delegate(FUNC(apple2gs_state::apple2gs_E1Cxxx_w),this));
/* install aux memory writes (for shadowing) */
space.install_write_handler(0x010400, 0x0107FF, write8_delegate(FUNC(apple2gs_state::apple2gs_aux0400_w), this));
space.install_write_handler(0x012000, 0x013FFF, write8_delegate(FUNC(apple2gs_state::apple2gs_aux2000_w), this));
space.install_write_handler(0x014000, 0x019FFF, write8_delegate(FUNC(apple2gs_state::apple2gs_aux4000_w), this));
/* setup the Apple II memory system */
memset(&cfg, 0, sizeof(cfg));
cfg.first_bank = 4;
cfg.memmap = apple2gs_memmap_entries;
cfg.auxmem = m_slowmem.get();
cfg.auxmem_length = 0x20000;
apple2_setup_memory(&cfg);
}
/* -----------------------------------------------------------------------
* Driver Init
* ----------------------------------------------------------------------- */
READ8_MEMBER(apple2gs_state::apple2gs_read_vector)
{
return m_maincpu->space(AS_PROGRAM).read_byte(offset | 0xFFFFE0);
}
MACHINE_RESET_MEMBER(apple2gs_state,apple2gs)
{
apple2gs_refresh_delegates();
// call "base class" machine reset to set up m_rambase and the language card
machine_reset();
m_cur_slot6_image = nullptr;
m_newvideo = 0x00;
m_vgcint = 0x00;
m_langsel = 0x00;
m_sltromsel = 0x00;
m_cyareg = 0x80;
m_inten = 0x00;
m_intflag = 0x00;
m_shadow = 0x00;
m_pending_irqs = 0x00;
m_mouse_x = 0x00;
m_mouse_y = 0x00;
m_mouse_dx = 0x00;
m_mouse_dy = 0x00;
#if !RUN_ADB_MICRO
m_adb_state = ADBSTATE_IDLE;
m_adb_kmstatus = 0x00;
m_adb_command = 0;
m_adb_mode = 0;
m_adb_latent_result = 0;
m_adb_command_length = 0;
m_adb_command_pos = 0;
memset(m_adb_command_bytes, 0, sizeof(m_adb_command_bytes));
memset(m_adb_response_bytes, 0, sizeof(m_adb_response_bytes));
m_adb_response_length = 0;
m_adb_response_pos = 0;
memset(m_adb_memory, 0, sizeof(m_adb_memory));
m_adb_address_keyboard = 2;
m_adb_address_mouse = 3;
#endif
/* init time */
m_clock_data = 0;
m_clock_control =0;
m_clock_read = 0;
m_clock_reg1 = 0;
m_clock_mode = CLOCKMODE_IDLE;
m_clock_curtime = 0;
m_clock_curtime_interval = 0;
m_sndglu_ctrl = 0x00;
m_sndglu_addr = 0;
m_sndglu_dummy_read = 0;
m_adb_dtime = 0;
m_last_adb_time = 0;
}
MACHINE_START_MEMBER(apple2gs_state,apple2gscommon)
{
apple2gs_refresh_delegates();
m_machinetype = APPLE_IIGS;
apple2eplus_init_common(nullptr);
/* setup globals */
m_is_rom3 = true;
machine().device<nvram_device>("nvram")->set_base(m_clock_bram, sizeof(m_clock_bram));
/* save state stuff. note that the driver takes care of docram. */
uint8_t* ram = m_ram->pointer();
save_pointer(ram, "APPLE2GS_RAM", m_ram->size());
save_item(m_newvideo, "NEWVIDEO");
save_item(m_bordercolor, "BORDERCOLOR");
save_item(m_vgcint, "VGCINT");
save_item(m_langsel, "LANGSEL");
save_item(m_sltromsel, "SLTROMSEL");
save_item(m_cyareg, "CYAREG");
save_item(m_inten, "INTEN");
save_item(m_intflag, "INTFLAG");
save_item(m_shadow, "SHADOW");
save_item(m_pending_irqs, "PENDIRQ");
save_item(m_mouse_x, "MX");
save_item(m_mouse_y, "MY");
save_item(m_mouse_dx, "MDX");
save_item(m_mouse_dy, "MDY");
save_item(m_clock_data, "CLKDATA");
save_item(m_clock_control, "CLKCTRL");
save_item(m_clock_read, "CLKRD");
save_item(m_clock_reg1, "CLKREG1");
save_item(m_clock_curtime, "CLKCURTIME");
save_item(m_clock_curtime_interval, "CLKCURTIMEINT");
// save_item(m_clock_mode, "CLKMODE");
save_item(NAME(m_clock_bram));
#if !RUN_ADB_MICRO
save_item(NAME(m_adb_memory));
save_item(NAME(m_adb_command_bytes));
save_item(NAME(m_adb_response_bytes));
// save_item(m_adb_state, "ADB/m_adb_state");
save_item(m_adb_command, "ADB/m_adb_command");
save_item(m_adb_mode, "ADB/m_adb_mode");
save_item(m_adb_kmstatus, "ADB/m_adb_kmstatus");
save_item(m_adb_latent_result, "ADB/m_adb_latent_result");
save_item(m_adb_command_length, "ADB/m_adb_command_length");
save_item(m_adb_command_pos, "ADB/m_adb_command_pos");
save_item(m_adb_response_length, "ADB/m_adb_response_length");
save_item(m_adb_response_pos, "ADB/m_adb_response_pos");
save_item(m_adb_address_keyboard, "ADB/m_adb_address_keyboard");
save_item(m_adb_address_mouse, "ADB/m_adb_address_mouse");
#endif
save_item(m_sndglu_ctrl, "SNDGLUCTRL");
save_item(m_sndglu_addr, "SNDGLUADDR");
save_item(m_sndglu_dummy_read, "SNDGLUDUMMYRD");
save_item(m_echo_bank, "ECHOBANK");
m_clock_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(apple2gs_state::apple2gs_clock_tick),this));
m_clock_timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1));
m_qsecond_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(apple2gs_state::apple2gs_qsecond_tick),this));
m_qsecond_timer->adjust(attotime::from_usec(266700), 0, attotime::from_usec(266700));
m_scanline_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(apple2gs_state::apple2gs_scanline_tick),this));
m_scanline_timer->adjust(attotime::never);
// fire on scanline zero
m_scanline_timer->adjust(m_screen->time_until_pos(0, 0));
}
MACHINE_START_MEMBER(apple2gs_state,apple2gs)
{
MACHINE_START_CALL_MEMBER(apple2gscommon);
apple2gs_setup_memory();
}
MACHINE_START_MEMBER(apple2gs_state,apple2gsr1)
{
MACHINE_START_CALL_MEMBER(apple2gscommon);
m_is_rom3 = false;
apple2gs_setup_memory();
}
void apple2gs_state::apple2gs_refresh_delegates()
{
write_delegates_2gs0400[0] = write8_delegate(FUNC(apple2gs_state::apple2gs_aux0400_w), this);
write_delegates_2gs0400[1] = write8_delegate(FUNC(apple2gs_state::apple2gs_main0400_w), this);
write_delegates_2gs2000[0] = write8_delegate(FUNC(apple2gs_state::apple2gs_aux2000_w), this);
write_delegates_2gs2000[1] = write8_delegate(FUNC(apple2gs_state::apple2gs_main2000_w), this);
write_delegates_2gs4000[0] = write8_delegate(FUNC(apple2gs_state::apple2gs_aux4000_w), this);
write_delegates_2gs4000[1] = write8_delegate(FUNC(apple2gs_state::apple2gs_main4000_w), this);
}
/* -----------------------------------------------------------------------
* Keym_glu / low-level ADB emulation
* ----------------------------------------------------------------------- */
#if RUN_ADB_MICRO
uint8_t apple2gs_state::keyglu_mcu_read(uint8_t offset)
{
uint8_t rv = m_glu_regs[offset];
// printf("MCU reads reg %x\n", offset);
// the command full flag is cleared by the MCU reading
// first the KGS register and then the command register
if ((offset == GLU_COMMAND) && (m_glu_mcu_read_kgs))
{
m_glu_regs[GLU_KG_STATUS] &= ~KGS_COMMAND_FULL;
m_glu_mcu_read_kgs = false;
// printf("MCU reads COMMAND = %02x (drop command full)\n", rv);
}
// prime for the next command register read to clear the command full flag
if (offset == GLU_KG_STATUS)
{
m_glu_mcu_read_kgs = true;
}
return rv;
}
void apple2gs_state::keyglu_mcu_write(uint8_t offset, uint8_t data)
{
m_glu_regs[offset] = data;
// printf("MCU writes %02x to reg %x\n", data, offset);
switch (offset)
{
case GLU_MOUSEX:
case GLU_MOUSEY:
m_glu_regs[GLU_KG_STATUS] |= KGS_MOUSEX_FULL;
m_glu_mouse_read_stat = false; // signal next read will be mouse X
break;
case GLU_ANY_KEY_DOWN: // bit 7 is the actual flag here; both MCU programs write either 0x7f or 0xff
// printf("%d to ANY_KEY_DOWN (PC=%x)\n", data, m_adbmicro->pc());
if (data & 0x80)
{
m_glu_regs[GLU_KG_STATUS] |= KGS_ANY_KEY_DOWN | KGS_KEYSTROBE;
}
break;
case GLU_DATA:
m_glu_regs[GLU_KG_STATUS] |= KGS_DATA_FULL;
m_glu_816_read_dstat = false;
// printf("MCU writes %02x to DATA\n", data);
break;
}
}
/*
Keym_glu registers map as follows on the 816:
C000 = key data + any key down, clears strobe
C010 = clears keystrobe
C024 MOUSEDATA = reads GLU mouseX and mouseY
C025 KEYMODREG = reads GLU keymod register
C026 DATAREG = writes from the 816 go to COMMAND, reads from DATA
C027 KMSTATUS = GLU system status register
*/
uint8_t apple2gs_state::keyglu_816_read(uint8_t offset)
{
switch (offset)
{
case GLU_C000:
{
uint8_t rv;
rv = m_glu_regs[GLU_KEY_DATA] & 0x7f;
if (m_glu_regs[GLU_KG_STATUS] & KGS_KEYSTROBE)
{
rv |= 0x80;
}
return rv;
}
break;
case GLU_C010:
{
uint8_t rv;
rv = m_glu_regs[GLU_KEY_DATA] & 0x7f;
if (m_glu_regs[GLU_KG_STATUS] & KGS_KEYSTROBE)
{
rv |= 0x80;
}
m_glu_regs[GLU_KG_STATUS] &= ~KGS_KEYSTROBE;
return rv;
}
break;
case GLU_MOUSEX:
case GLU_MOUSEY:
if (!m_glu_mouse_read_stat)
{
m_glu_mouse_read_stat = 1;
return m_glu_regs[GLU_MOUSEY];
}
return m_glu_regs[GLU_MOUSEX];
case GLU_SYSSTAT:
// regenerate sysstat bits
m_glu_sysstat &= ~0xab; // mask off read/write bits
if (m_glu_regs[GLU_KG_STATUS] & KGS_COMMAND_FULL)
{
m_glu_sysstat |= 1;
}
if (m_glu_regs[GLU_KG_STATUS] & m_glu_mouse_read_stat)
{
m_glu_sysstat |= 2;
}
if (m_glu_regs[GLU_KG_STATUS] & KGS_KEYSTROBE)
{
m_glu_sysstat |= 8;
}
if (m_glu_regs[GLU_KG_STATUS] & KGS_DATA_FULL)
{
m_glu_sysstat |= 0x20;
}
if (m_glu_regs[GLU_KG_STATUS] & KGS_MOUSEX_FULL)
{
m_glu_sysstat |= 0x80;
}
m_glu_816_read_dstat = true;
// printf("816 gets %02x in sysstat (data avail %02x)\n", m_glu_sysstat, m_glu_sysstat & 0x20);
return m_glu_sysstat;
case GLU_DATA:
if (m_glu_816_read_dstat)
{
m_glu_816_read_dstat = false;
m_glu_regs[GLU_KG_STATUS] &= ~KGS_DATA_FULL;
// printf("816 reads %02x from DATA\n", m_glu_regs[GLU_DATA]);
}
return m_glu_regs[GLU_DATA];
default:
return m_glu_regs[offset];
break;
}
return 0xff;
}
void apple2gs_state::keyglu_816_write(uint8_t offset, uint8_t data)
{
if (offset < GLU_C000)
{
m_glu_regs[offset&7] = data;
}
switch (offset)
{
case GLU_C010:
m_glu_regs[GLU_KG_STATUS] &= ~KGS_KEYSTROBE;
break;
case GLU_COMMAND:
// printf("816 sets COMMAND to %02x (raise command full)\n", data);
m_glu_regs[GLU_KG_STATUS] |= KGS_COMMAND_FULL;
break;
case GLU_SYSSTAT:
m_glu_sysstat &= 0xab; // clear the non-read-only fields
m_glu_sysstat |= (data & ~0xab);
break;
}
}
#endif