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|
/***************************************************************************
wswan.c
Machine file to handle emulation of the Bandai WonderSwan.
Anthony Kruize
Wilbert Pol
TODO:
SRAM sizes should be in kbit instead of kbytes(?). This raises a few
interesting issues:
- mirror of smaller <64KBYTE/512kbit sram sizes
- banking when using 1M or 2M sram sizes
***************************************************************************/
#include "includes/wswan.h"
#define INTERNAL_EEPROM_SIZE 1024
enum enum_system { TYPE_WSWAN=0, TYPE_WSC };
static const UINT8 ws_portram_init[256] =
{
0x00, 0x00, 0x00/*?*/, 0xbb, 0x00, 0x00, 0x00, 0x26, 0xfe, 0xde, 0xf9, 0xfb, 0xdb, 0xd7, 0x7f, 0xf5,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x9e, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x99, 0xfd, 0xb7, 0xdf,
0x30, 0x57, 0x75, 0x76, 0x15, 0x73, 0x70/*77?*/, 0x77, 0x20, 0x75, 0x50, 0x36, 0x70, 0x67, 0x50, 0x77,
0x57, 0x54, 0x75, 0x77, 0x75, 0x17, 0x37, 0x73, 0x50, 0x57, 0x60, 0x77, 0x70, 0x77, 0x10, 0x73,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00,
0x87, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x4f, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xdb, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x42, 0x00, 0x83, 0x00,
0x2f, 0x3f, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1,
0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1,
0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1,
0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1
};
/*
Some fake bios code to initialize some registers and set up some things on the wonderswan.
The code from f:ffe0 which gets copied to 0:0400 is taken from a wonderswan crystal's initial
memory settings. Lacking real bios dumps we will use this....
The setting of SP to 2000h is what's needed to get Wonderswan Colloseum to boot.
f000:ffc0
FC cld
BC 00 20 mov sp,2000h
68 00 00 push 0000h
07 pop es
68 00 F0 push F000h
1F pop ds
BF 00 04 mov di,0400h
BE E0 FF mov si,FFE0h
B9 10 00 mov cx,0010h
F3 A4 rep movsb
B0 2F mov al,2Fh
E6 C0 out al,C0h
EA 00 04 00 00 jmp 0000:0400
f000:ffe0
E4 A0 in al, A0h
0C 01 or al,01h
E6 A0 out al,A0h
EA 00 00 FF FF jmp FFFFh:0000h
*/
static const UINT8 ws_fake_bios_code[] = {
0xfc, 0xbc, 0x00, 0x20, 0x68, 0x00, 0x00, 0x07, 0x68, 0x00, 0xf0, 0x1f, 0xbf, 0x00, 0x04, 0xbe,
0xe0, 0xff, 0xb9, 0x10, 0x00, 0xf3, 0xa4, 0xb0, 0x2f, 0xe6, 0xc0, 0xea, 0x00, 0x04, 0x00, 0x00,
0xe4, 0xa0, 0x0c, 0x01, 0xe6, 0xa0, 0xea, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
0xea, 0xc0, 0xff, 0x00, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
void wswan_state::wswan_handle_irqs()
{
if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_HBLTMR )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_HBLTMR );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_VBL )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_VBL );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_VBLTMR )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_VBLTMR );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_LCMP )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_LCMP );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_SRX )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_SRX );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_RTC )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_RTC );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_KEY )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_KEY );
}
else if ( m_ws_portram[0xb2] & m_ws_portram[0xb6] & WSWAN_IFLAG_STX )
{
m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_ws_portram[0xb0] + WSWAN_INT_STX );
}
else
{
m_maincpu->set_input_line(0, CLEAR_LINE );
}
}
void wswan_state::wswan_set_irq_line(int irq)
{
if ( m_ws_portram[0xb2] & irq )
{
m_ws_portram[0xb6] |= irq;
wswan_handle_irqs();
}
}
void wswan_state::wswan_clear_irq_line(int irq)
{
m_ws_portram[0xb6] &= ~irq;
wswan_handle_irqs();
}
void wswan_state::wswan_register_save()
{
save_item(NAME(m_ws_portram));
save_item(NAME(m_internal_eeprom));
save_item(NAME(m_bios_disabled));
save_item(NAME(m_rotate));
save_item(NAME(m_vdp.layer_bg_enable));
save_item(NAME(m_vdp.layer_fg_enable));
save_item(NAME(m_vdp.sprites_enable));
save_item(NAME(m_vdp.window_sprites_enable));
save_item(NAME(m_vdp.window_fg_mode));
save_item(NAME(m_vdp.current_line));
save_item(NAME(m_vdp.line_compare));
save_item(NAME(m_vdp.sprite_table_address));
save_item(NAME(m_vdp.sprite_table_buffer));
save_item(NAME(m_vdp.sprite_first));
save_item(NAME(m_vdp.sprite_count));
save_item(NAME(m_vdp.layer_bg_address));
save_item(NAME(m_vdp.layer_fg_address));
save_item(NAME(m_vdp.window_fg_left));
save_item(NAME(m_vdp.window_fg_top));
save_item(NAME(m_vdp.window_fg_right));
save_item(NAME(m_vdp.window_fg_bottom));
save_item(NAME(m_vdp.window_sprites_left));
save_item(NAME(m_vdp.window_sprites_top));
save_item(NAME(m_vdp.window_sprites_right));
save_item(NAME(m_vdp.window_sprites_bottom));
save_item(NAME(m_vdp.layer_bg_scroll_x));
save_item(NAME(m_vdp.layer_bg_scroll_y));
save_item(NAME(m_vdp.layer_fg_scroll_x));
save_item(NAME(m_vdp.layer_fg_scroll_y));
save_item(NAME(m_vdp.lcd_enable));
save_item(NAME(m_vdp.icons));
save_item(NAME(m_vdp.color_mode));
save_item(NAME(m_vdp.colors_16));
save_item(NAME(m_vdp.tile_packed));
save_item(NAME(m_vdp.timer_hblank_enable));
save_item(NAME(m_vdp.timer_hblank_mode));
save_item(NAME(m_vdp.timer_hblank_reload));
save_item(NAME(m_vdp.timer_vblank_enable));
save_item(NAME(m_vdp.timer_vblank_mode));
save_item(NAME(m_vdp.timer_vblank_reload));
save_item(NAME(m_vdp.timer_vblank_count));
save_item(NAME(m_vdp.main_palette));
save_item(NAME(m_sound_dma.source));
save_item(NAME(m_sound_dma.size));
save_item(NAME(m_sound_dma.enable));
if (m_cart->exists())
m_cart->save_nvram();
machine().save().register_postload(save_prepost_delegate(FUNC(wswan_state::wswan_postload), this));
}
void wswan_state::wswan_postload()
{
address_space &space = m_maincpu->space(AS_PROGRAM);
// restore the vdp pointers
m_vdp.vram = (UINT8*)space.get_read_ptr(0);
m_vdp.palette_vram = (UINT8*)space.get_read_ptr((m_system_type == TYPE_WSC) ? 0xfe00 : 0);
}
void wswan_state::common_start()
{
m_ws_bios_bank = auto_alloc_array(machine(), UINT8, 0x10000);
memcpy(m_ws_bios_bank + 0xffc0, ws_fake_bios_code, 0x40);
m_vdp.timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(wswan_state::wswan_scanline_interrupt),this), &m_vdp);
m_vdp.timer->adjust(attotime::from_ticks(256, 3072000), 0, attotime::from_ticks(256, 3072000));
wswan_register_save();
machine().device<nvram_device>("nvram")->set_base(m_internal_eeprom, INTERNAL_EEPROM_SIZE);
if (m_cart->exists())
{
// ROM
m_maincpu->space(AS_PROGRAM).install_read_handler(0x20000, 0x2ffff, read8_delegate(FUNC(ws_cart_slot_device::read_rom20),(ws_cart_slot_device*)m_cart));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x30000, 0x3ffff, read8_delegate(FUNC(ws_cart_slot_device::read_rom30),(ws_cart_slot_device*)m_cart));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x40000, 0xeffff, read8_delegate(FUNC(ws_cart_slot_device::read_rom40),(ws_cart_slot_device*)m_cart));
// SRAM
if (m_cart->get_type() == WS_SRAM)
{
m_maincpu->space(AS_PROGRAM).install_read_handler(0x10000, 0x1ffff, read8_delegate(FUNC(ws_cart_slot_device::read_ram),(ws_cart_slot_device*)m_cart));
m_maincpu->space(AS_PROGRAM).install_write_handler(0x10000, 0x1ffff, write8_delegate(FUNC(ws_cart_slot_device::write_ram),(ws_cart_slot_device*)m_cart));
}
}
}
void wswan_state::machine_start()
{
common_start();
m_system_type = TYPE_WSWAN;
}
MACHINE_START_MEMBER(wswan_state,wscolor)
{
common_start();
m_system_type = TYPE_WSC;
}
void wswan_state::machine_reset()
{
address_space &space = m_maincpu->space(AS_PROGRAM);
m_bios_disabled = 0;
m_ws_ram = (UINT8*) m_maincpu->space(AS_PROGRAM).get_read_ptr(0);
memset(m_ws_ram, 0, 0xffff);
if (m_cart->exists())
m_rotate = m_cart->get_is_rotated();
else
m_rotate = 0;
/* Intialize ports */
memcpy(m_ws_portram, ws_portram_init, 256);
/* Initialize VDP */
memset(&m_vdp, 0, sizeof(m_vdp));
m_vdp.vram = (UINT8*)space.get_read_ptr(0);
m_vdp.palette_vram = (UINT8*)space.get_read_ptr(( m_system_type == TYPE_WSC ) ? 0xFE00 : 0 );
m_vdp.current_line = 145; /* Randomly chosen, beginning of VBlank period to give cart some time to boot up */
m_vdp.color_mode = 0;
m_vdp.colors_16 = 0;
m_vdp.tile_packed = 0;
render_target *target = machine().render().first_target();
target->set_view(m_rotate);
/* Initialize sound DMA */
memset(&m_sound_dma, 0, sizeof(m_sound_dma));
}
READ8_MEMBER( wswan_state::bios_r )
{
if (!m_bios_disabled)
return m_ws_bios_bank[offset];
else
return m_cart->read_rom40(space, offset + 0xb0000);
}
READ8_MEMBER( wswan_state::port_r )
{
UINT8 value = m_ws_portram[offset];
if (offset != 2)
logerror("PC=%X: port read %02X\n", m_maincpu->pc(), offset);
switch (offset)
{
case 0x02: // Current line
value = m_vdp.current_line;
break;
case 0x4a: // Sound DMA source address (low)
value = m_sound_dma.source & 0xff;
break;
case 0x4b: // Sound DMA source address (high)
value = (m_sound_dma.source >> 8) & 0xff;
break;
case 0x4c: // Sound DMA source memory segment
value = (m_sound_dma.source >> 16) & 0xff;
break;
case 0x4e: // Sound DMA transfer size (low)
value = m_sound_dma.size & 0xff;
break;
case 0x4f: // Sound DMA transfer size (high)
value = (m_sound_dma.size >> 8) & 0xff;
break;
case 0x52: // Sound DMA start/stop
value = m_sound_dma.enable;
break;
case 0xa0: // Hardware type
// Bit 0 - Disable/enable Bios
// Bit 1 - Determine mono/color
// Bit 2 - Determine color/crystal
value = value & ~ 0x02;
if (m_system_type == TYPE_WSC)
value |= 2;
break;
case 0xa8:
value = m_vdp.timer_hblank_count & 0xff;
break;
case 0xa9:
value = m_vdp.timer_hblank_count >> 8;
break;
case 0xaa:
value = m_vdp.timer_vblank_count & 0xff;
break;
case 0xab:
value = m_vdp.timer_vblank_count >> 8;
break;
case 0xc0:
case 0xc1:
case 0xc2:
case 0xc3:
case 0xc4: // EEPROM data
case 0xc5: // EEPROM data
case 0xc6:
case 0xc7:
case 0xc8:
case 0xc9:
case 0xca:
case 0xcb: // RTC data
case 0xcc:
case 0xcd:
case 0xce:
case 0xcf:
value = m_cart->read_io(space, offset & 0x0f);
break;
}
return value;
}
WRITE8_MEMBER( wswan_state::port_w )
{
address_space &mem = m_maincpu->space(AS_PROGRAM);
UINT8 input;
logerror("PC=%X: port write %02X <- %02X\n", m_maincpu->pc(), offset, data);
switch (offset)
{
case 0x00: /* Display control
Bit 0 - Background layer enable
Bit 1 - Foreground layer enable
Bit 2 - Sprites enable
Bit 3 - Sprite window enable
Bit 4-5 - Foreground window configuration
00 - Foreground layer is displayed inside and outside foreground window area
01 - Unknown
10 - Foreground layer is displayed only inside foreground window area
11 - Foreground layer is displayed outside foreground window area
Bit 6-7 - Unknown
*/
m_vdp.layer_bg_enable = data & 0x1;
m_vdp.layer_fg_enable = (data & 0x2) >> 1;
m_vdp.sprites_enable = (data & 0x4) >> 2;
m_vdp.window_sprites_enable = (data & 0x8) >> 3;
m_vdp.window_fg_mode = (data & 0x30) >> 4;
break;
case 0x01: /* Background colour
In 16 colour mode:
Bit 0-3 - Palette index
Bit 4-7 - Palette number
Otherwise:
Bit 0-2 - Main palette index
Bit 3-7 - Unknown
*/
break;
case 0x02: /* Current scanline
Bit 0-7 - Current scanline (Most likely read-only)
*/
logerror( "Write to current scanline! Current value: %d Data to write: %d\n", m_vdp.current_line, data );
/* Returning so we don't overwrite the value here, not that it
* really matters */
return;
case 0x03: /* Line compare
Bit 0-7 - Line compare
*/
m_vdp.line_compare = data;
logerror( "Write to line compare: %d\n", data );
break;
case 0x04: /* Sprite table base address
Bit 0-5 - Determine sprite table base address 0 0xxxxxx0 00000000
Bit 6-7 - Unknown
*/
m_vdp.sprite_table_address = ( data & 0x3F ) << 9;
break;
case 0x05: /* Number of sprite to start drawing with
Bit 0-7 - First sprite number
*/
//m_vdp.sprite_first = data;
if (data) logerror("non-zero first sprite %d\n", m_vdp.sprite_first);
break;
case 0x06: /* Number of sprites to draw
Bit 0-7 - Number of sprites to draw
*/
//m_vdp.sprite_count = data;
break;
case 0x07: /* Background/Foreground table base addresses
Bit 0-2 - Determine background table base address 00xxx000 00000000
Bit 3 - Unknown
Bit 4-6 - Determine foreground table base address 00xxx000 00000000
Bit 7 - Unknown
*/
m_vdp.layer_bg_address = (data & 0x7) << 11;
m_vdp.layer_fg_address = (data & 0x70) << 7;
break;
case 0x08: /* Left coordinate of foreground window
Bit 0-7 - Left coordinate of foreground window area
*/
m_vdp.window_fg_left = data;
break;
case 0x09: /* Top coordinate of foreground window
Bit 0-7 - Top coordinatte of foreground window area
*/
m_vdp.window_fg_top = data;
break;
case 0x0a: /* Right coordinate of foreground window
Bit 0-7 - Right coordinate of foreground window area
*/
m_vdp.window_fg_right = data;
break;
case 0x0b: /* Bottom coordinate of foreground window
Bit 0-7 - Bottom coordinate of foreground window area
*/
m_vdp.window_fg_bottom = data;
break;
case 0x0c: /* Left coordinate of sprite window
Bit 0-7 - Left coordinate of sprite window area
*/
m_vdp.window_sprites_left = data;
break;
case 0x0d: /* Top coordinate of sprite window
Bit 0-7 - Top coordinate of sprite window area
*/
m_vdp.window_sprites_top = data;
break;
case 0x0e: /* Right coordinate of sprite window
Bit 0-7 - Right coordinate of sprite window area
*/
m_vdp.window_sprites_right = data;
break;
case 0x0f: /* Bottom coordinate of sprite window
Bit 0-7 - Bottom coordiante of sprite window area
*/
m_vdp.window_sprites_bottom = data;
break;
case 0x10: /* Background layer X scroll
Bit 0-7 - Background layer X scroll
*/
m_vdp.layer_bg_scroll_x = data;
break;
case 0x11: /* Background layer Y scroll
Bit 0-7 - Background layer Y scroll
*/
m_vdp.layer_bg_scroll_y = data;
break;
case 0x12: /* Foreground layer X scroll
Bit 0-7 - Foreground layer X scroll
*/
m_vdp.layer_fg_scroll_x = data;
break;
case 0x13: /* Foreground layer Y scroll
Bit 0-7 - Foreground layer Y scroll
*/
m_vdp.layer_fg_scroll_y = data;
break;
case 0x14: /* LCD control
Bit 0 - LCD enable
Bit 1-7 - Unknown
*/
m_vdp.lcd_enable = data & 0x1;
break;
case 0x15: /* LCD icons
Bit 0 - LCD sleep icon enable
Bit 1 - Vertical position icon enable
Bit 2 - Horizontal position icon enable
Bit 3 - Dot 1 icon enable
Bit 4 - Dot 2 icon enable
Bit 5 - Dot 3 icon enable
Bit 6-7 - Unknown
*/
m_vdp.icons = data; /* ummmmm */
break;
case 0x1c: /* Palette colors 0 and 1
Bit 0-3 - Gray tone setting for main palette index 0
Bit 4-7 - Gray tone setting for main palette index 1
*/
if (m_system_type == TYPE_WSC)
{
int i = 15 - ( data & 0x0F );
int j = 15 - ( ( data & 0xF0 ) >> 4 );
m_vdp.main_palette[0] = ( i << 8 ) | ( i << 4 ) | i;
m_vdp.main_palette[1] = ( j << 8 ) | ( j << 4 ) | j;
}
else
{
m_vdp.main_palette[0] = data & 0x0F;
m_vdp.main_palette[1] = ( data & 0xF0 ) >> 4;
}
break;
case 0x1d: /* Palette colors 2 and 3
Bit 0-3 - Gray tone setting for main palette index 2
Bit 4-7 - Gray tone setting for main palette index 3
*/
if (m_system_type == TYPE_WSC)
{
int i = 15 - ( data & 0x0F );
int j = 15 - ( ( data & 0xF0 ) >> 4 );
m_vdp.main_palette[2] = ( i << 8 ) | ( i << 4 ) | i;
m_vdp.main_palette[3] = ( j << 8 ) | ( j << 4 ) | j;
}
else
{
m_vdp.main_palette[2] = data & 0x0F;
m_vdp.main_palette[3] = ( data & 0xF0 ) >> 4;
}
break;
case 0x1e: /* Palette colors 4 and 5
Bit 0-3 - Gray tone setting for main palette index 4
Bit 4-7 - Gray tone setting for main paeltte index 5
*/
if (m_system_type == TYPE_WSC)
{
int i = 15 - ( data & 0x0F );
int j = 15 - ( ( data & 0xF0 ) >> 4 );
m_vdp.main_palette[4] = ( i << 8 ) | ( i << 4 ) | i;
m_vdp.main_palette[5] = ( j << 8 ) | ( j << 4 ) | j;
}
else
{
m_vdp.main_palette[4] = data & 0x0F;
m_vdp.main_palette[5] = ( data & 0xF0 ) >> 4;
}
break;
case 0x1f: /* Palette colors 6 and 7
Bit 0-3 - Gray tone setting for main palette index 6
Bit 4-7 - Gray tone setting for main palette index 7
*/
if (m_system_type == TYPE_WSC)
{
int i = 15 - ( data & 0x0F );
int j = 15 - ( ( data & 0xF0 ) >> 4 );
m_vdp.main_palette[6] = ( i << 8 ) | ( i << 4 ) | i;
m_vdp.main_palette[7] = ( j << 8 ) | ( j << 4 ) | j;
}
else
{
m_vdp.main_palette[6] = data & 0x0F;
m_vdp.main_palette[7] = ( data & 0xF0 ) >> 4;
}
break;
case 0x20: /* tile/sprite palette settings
Bit 0-3 - Palette 0 index 0
Bit 4-7 - Palette 0 index 1 */
case 0x21: /* Bit 0-3 - Palette 0 index 2
Bit 4-7 - Palette 0 index 3 */
case 0x22: /* Bit 0-3 - Palette 1 index 0
Bit 4-7 - Palette 1 index 1 */
case 0x23: /* Bit 0-3 - Palette 1 index 2
Bit 4-7 - Palette 1 index 3 */
case 0x24: /* Bit 0-3 - Palette 2 index 0
Bit 4-7 - Palette 2 index 1 */
case 0x25: /* Bit 0-3 - Palette 2 index 2
Bit 4-7 - Palette 2 index 3 */
case 0x26: /* Bit 0-3 - Palette 3 index 0
Bit 4-7 - Palette 3 index 1 */
case 0x27: /* Bit 0-3 - Palette 3 index 2
Bit 4-7 - Palette 3 index 3 */
case 0x28: /* Bit 0-3 - Palette 4 index 0
Bit 4-7 - Palette 4 index 1 */
case 0x29: /* Bit 0-3 - Palette 4 index 2
Bit 4-7 - Palette 4 index 3 */
case 0x2a: /* Bit 0-3 - Palette 5 index 0
Bit 4-7 - Palette 5 index 1 */
case 0x2b: /* Bit 0-3 - Palette 5 index 2
Bit 4-7 - Palette 5 index 3 */
case 0x2c: /* Bit 0-3 - Palette 6 index 0
Bit 4-7 - Palette 6 index 1 */
case 0x2d: /* Bit 0-3 - Palette 6 index 2
Bit 4-7 - Palette 6 index 3 */
case 0x2e: /* Bit 0-3 - Palette 7 index 0
Bit 4-7 - Palette 7 index 1 */
case 0x2f: /* Bit 0-3 - Palette 7 index 2
Bit 4-7 - Palette 7 index 3 */
case 0x30: /* Bit 0-3 - Palette 8 / Sprite Palette 0 index 0
Bit 4-7 - Palette 8 / Sprite Palette 0 index 1 */
case 0x31: /* Bit 0-3 - Palette 8 / Sprite Palette 0 index 2
Bit 4-7 - Palette 8 / Sprite Palette 0 index 3 */
case 0x32: /* Bit 0-3 - Palette 9 / Sprite Palette 1 index 0
Bit 4-7 - Palette 9 / Sprite Palette 1 index 1 */
case 0x33: /* Bit 0-3 - Palette 9 / Sprite Palette 1 index 2
Bit 4-7 - Palette 9 / Sprite Palette 1 index 3 */
case 0x34: /* Bit 0-3 - Palette 10 / Sprite Palette 2 index 0
Bit 4-7 - Palette 10 / Sprite Palette 2 index 1 */
case 0x35: /* Bit 0-3 - Palette 10 / Sprite Palette 2 index 2
Bit 4-7 - Palette 10 / Sprite Palette 2 index 3 */
case 0x36: /* Bit 0-3 - Palette 11 / Sprite Palette 3 index 0
Bit 4-7 - Palette 11 / Sprite Palette 3 index 1 */
case 0x37: /* Bit 0-3 - Palette 11 / Sprite Palette 3 index 2
Bit 4-7 - Palette 11 / Sprite Palette 3 index 3 */
case 0x38: /* Bit 0-3 - Palette 12 / Sprite Palette 4 index 0
Bit 4-7 - Palette 12 / Sprite Palette 4 index 1 */
case 0x39: /* Bit 0-3 - Palette 12 / Sprite Palette 4 index 2
Bit 4-7 - Palette 12 / Sprite Palette 4 index 3 */
case 0x3a: /* Bit 0-3 - Palette 13 / Sprite Palette 5 index 0
Bit 4-7 - Palette 13 / Sprite Palette 5 index 1 */
case 0x3b: /* Bit 0-3 - Palette 13 / Sprite Palette 5 index 2
Bit 4-7 - Palette 13 / Sprite Palette 5 index 3 */
case 0x3c: /* Bit 0-3 - Palette 14 / Sprite Palette 6 index 0
Bit 4-7 - Palette 14 / Sprite Palette 6 index 1 */
case 0x3d: /* Bit 0-3 - Palette 14 / Sprite Palette 6 index 2
Bit 4-7 - Palette 14 / Sprite Palette 6 index 3 */
case 0x3e: /* Bit 0-3 - Palette 15 / Sprite Palette 7 index 0
Bit 4-7 - Palette 15 / Sprite Palette 7 index 1 */
case 0x3f: /* Bit 0-3 - Palette 15 / Sprite Palette 7 index 2
Bit 4-7 - Palette 15 / Sprite Palette 7 index 3 */
break;
case 0x40: /* DMA source address (low)
Bit 0-7 - DMA source address bit 0-7
*/
case 0x41: /* DMA source address (high)
Bit 0-7 - DMA source address bit 8-15
*/
case 0x42: /* DMA source bank
Bit 0-7 - DMA source bank number
*/
case 0x43: /* DMA destination bank
Bit 0-7 - DMA destination bank number
*/
case 0x44: /* DMA destination address (low)
Bit 0-7 - DMA destination address bit 0-7
*/
case 0x45: /* DMA destination address (high)
Bit 0-7 - DMA destination address bit 8-15
*/
case 0x46: /* Size of copied data (low)
Bit 0-7 - DMA size bit 0-7
*/
case 0x47: /* Size of copied data (high)
Bit 0-7 - DMA size bit 8-15
*/
break;
case 0x48: /* DMA control
Bit 0-6 - Unknown
Bit 7 - DMA stop/start
*/
if (data & 0x80)
{
UINT32 src, dst;
UINT16 length;
src = m_ws_portram[0x40] + (m_ws_portram[0x41] << 8) + (m_ws_portram[0x42] << 16);
dst = m_ws_portram[0x44] + (m_ws_portram[0x45] << 8) + (m_ws_portram[0x43] << 16);
length = m_ws_portram[0x46] + (m_ws_portram[0x47] << 8);
for ( ; length > 0; length--)
{
mem.write_byte(dst, mem.read_byte(src));
src++;
dst++;
}
#ifdef MAME_DEBUG
logerror("DMA src:%X dst:%X length:%d\n", src, dst, length);
#endif
m_ws_portram[0x40] = src & 0xff;
m_ws_portram[0x41] = (src >> 8) & 0xff;
m_ws_portram[0x44] = dst & 0xff;
m_ws_portram[0x45] = (dst >> 8) & 0xff;
m_ws_portram[0x46] = length & 0xff;
m_ws_portram[0x47] = (length >> 8) & 0xff;
data &= 0x7f;
}
break;
case 0x4a: /* Sound DMA source address (low)
Bit 0-7 - Sound DMA source address bit 0-7
*/
m_sound_dma.source = (m_sound_dma.source & 0x0fff00) | data;
break;
case 0x4b: /* Sound DMA source address (high)
Bit 0-7 - Sound DMA source address bit 8-15
*/
m_sound_dma.source = (m_sound_dma.source & 0x0f00ff) | (data << 8);
break;
case 0x4c: /* Sound DMA source memory segment
Bit 0-3 - Sound DMA source address segment
Bit 4-7 - Unknown
*/
m_sound_dma.source = (m_sound_dma.source & 0xffff) | ((data & 0x0f) << 16);
break;
case 0x4d: /* Unknown */
break;
case 0x4e: /* Sound DMA transfer size (low)
Bit 0-7 - Sound DMA transfer size bit 0-7
*/
m_sound_dma.size = (m_sound_dma.size & 0xff00) | data;
break;
case 0x4f: /* Sound DMA transfer size (high)
Bit 0-7 - Sound DMA transfer size bit 8-15
*/
m_sound_dma.size = (m_sound_dma.size & 0xff) | (data << 8);
break;
case 0x50: /* Unknown */
case 0x51: /* Unknown */
break;
case 0x52: /* Sound DMA start/stop
Bit 0-6 - Unknown
Bit 7 - Sound DMA stop/start
*/
m_sound_dma.enable = data;
break;
case 0x60: /* Video mode
Bit 0-4 - Unknown
Bit 5 - Packed mode 0 = not packed mode, 1 = packed mode
Bit 6 - 4/16 colour mode select: 0 = 4 colour mode, 1 = 16 colour mode
Bit 7 - monochrome/colour mode select: 0 = monochrome mode, 1 = colour mode
*/
/*
* 111 - packed, 16 color, use 4000/8000, color
* 110 - not packed, 16 color, use 4000/8000, color
* 101 - packed, 4 color, use 2000, color
* 100 - not packed, 4 color, use 2000, color
* 011 - packed, 16 color, use 4000/8000, monochrome
* 010 - not packed, 16 color , use 4000/8000, monochrome
* 001 - packed, 4 color, use 2000, monochrome
* 000 - not packed, 4 color, use 2000, monochrome - Regular WS monochrome
*/
if (m_system_type == TYPE_WSC)
{
m_vdp.color_mode = data & 0x80;
m_vdp.colors_16 = data & 0x40;
m_vdp.tile_packed = data & 0x20;
}
break;
case 0x80: /* Audio 1 freq (lo)
Bit 0-7 - Audio channel 1 frequency bit 0-7
*/
case 0x81: /* Audio 1 freq (hi)
Bit 0-7 - Audio channel 1 frequency bit 8-15
*/
case 0x82: /* Audio 2 freq (lo)
Bit 0-7 - Audio channel 2 frequency bit 0-7
*/
case 0x83: /* Audio 2 freq (hi)
Bit 0-7 - Audio channel 2 frequency bit 8-15
*/
case 0x84: /* Audio 3 freq (lo)
Bit 0-7 - Audio channel 3 frequency bit 0-7
*/
case 0x85: /* Audio 3 freq (hi)
Bit 0-7 - Audio channel 3 frequency bit 8-15
*/
case 0x86: /* Audio 4 freq (lo)
Bit 0-7 - Audio channel 4 frequency bit 0-7
*/
case 0x87: /* Audio 4 freq (hi)
Bit 0-7 - Audio channel 4 frequency bit 8-15
*/
case 0x88: /* Audio 1 volume
Bit 0-3 - Right volume audio channel 1
Bit 4-7 - Left volume audio channel 1
*/
case 0x89: /* Audio 2 volume
Bit 0-3 - Right volume audio channel 2
Bit 4-7 - Left volume audio channel 2
*/
case 0x8a: /* Audio 3 volume
Bit 0-3 - Right volume audio channel 3
Bit 4-7 - Left volume audio channel 3
*/
case 0x8b: /* Audio 4 volume
Bit 0-3 - Right volume audio channel 4
Bit 4-7 - Left volume audio channel 4
*/
case 0x8c: /* Sweep step
Bit 0-7 - Sweep step
*/
case 0x8d: /* Sweep time
Bit 0-7 - Sweep time
*/
case 0x8e: /* Noise control
Bit 0-2 - Noise generator type
Bit 3 - Reset
Bit 4 - Enable
Bit 5-7 - Unknown
*/
case 0x8f: /* Sample location
Bit 0-7 - Sample address location 0 00xxxxxx xx000000
*/
case 0x90: /* Audio control
Bit 0 - Audio 1 enable
Bit 1 - Audio 2 enable
Bit 2 - Audio 3 enable
Bit 3 - Audio 4 enable
Bit 4 - Unknown
Bit 5 - Audio 2 voice mode enable
Bit 6 - Audio 3 sweep mode enable
Bit 7 - Audio 4 noise mode enable
*/
case 0x91: /* Audio output
Bit 0 - Mono select
Bit 1-2 - Output volume
Bit 3 - External stereo
Bit 4-6 - Unknown
Bit 7 - External speaker (Read-only, set by hardware)
*/
case 0x92: /* Noise counter shift register (lo)
Bit 0-7 - Noise counter shift register bit 0-7
*/
case 0x93: /* Noise counter shift register (hi)
Bit 0-6 - Noise counter shift register bit 8-14
bit 7 - Unknown
*/
case 0x94: /* Master volume
Bit 0-3 - Master volume
Bit 4-7 - Unknown
*/
m_sound->port_w(space, offset, data);
break;
case 0xa0: /* Hardware type - this is probably read only
Bit 0 - Enable cartridge slot and/or disable bios
Bit 1 - Hardware type: 0 = WS, 1 = WSC
Bit 2-7 - Unknown
*/
if ((data & 0x01) && !m_bios_disabled)
m_bios_disabled = 1;
break;
case 0xa2: /* Timer control
Bit 0 - HBlank Timer enable
Bit 1 - HBlank Timer mode: 0 = one shot, 1 = auto reset
Bit 2 - VBlank Timer(1/75s) enable
Bit 3 - VBlank Timer mode: 0 = one shot, 1 = auto reset
Bit 4-7 - Unknown
*/
m_vdp.timer_hblank_enable = BIT(data, 0);
m_vdp.timer_hblank_mode = BIT(data, 1);
m_vdp.timer_vblank_enable = BIT(data, 2);
m_vdp.timer_vblank_mode = BIT(data, 3);
break;
case 0xa4: /* HBlank timer frequency (low) - reload value
Bit 0-7 - HBlank timer reload value bit 0-7
*/
m_vdp.timer_hblank_reload &= 0xff00;
m_vdp.timer_hblank_reload += data;
m_vdp.timer_hblank_count = m_vdp.timer_hblank_reload;
break;
case 0xa5: /* HBlank timer frequency (high) - reload value
Bit 8-15 - HBlank timer reload value bit 8-15
*/
m_vdp.timer_hblank_reload &= 0xff;
m_vdp.timer_hblank_reload += data << 8;
m_vdp.timer_hblank_count = m_vdp.timer_hblank_reload;
break;
case 0xa6: /* VBlank timer frequency (low) - reload value
Bit 0-7 - VBlank timer reload value bit 0-7
*/
m_vdp.timer_vblank_reload &= 0xff00;
m_vdp.timer_vblank_reload += data;
m_vdp.timer_vblank_count = m_vdp.timer_vblank_reload;
break;
case 0xa7: /* VBlank timer frequency (high) - reload value
Bit 0-7 - VBlank timer reload value bit 8-15
*/
m_vdp.timer_vblank_reload &= 0xff;
m_vdp.timer_vblank_reload += data << 8;
m_vdp.timer_vblank_count = m_vdp.timer_vblank_reload;
break;
case 0xa8: /* HBlank counter (low)
Bit 0-7 - HBlank counter bit 0-7
*/
case 0xa9: /* HBlank counter (high)
Bit 0-7 - HBlank counter bit 8-15
*/
case 0xaa: /* VBlank counter (low)
Bit 0-7 - VBlank counter bit 0-7
*/
case 0xab: /* VBlank counter (high)
Bit 0-7 - VBlank counter bit 8-15
*/
break;
case 0xb0: /* Interrupt base vector
Bit 0-7 - Interrupt base vector
*/
break;
case 0xb1: /* Communication byte
Bit 0-7 - Communication byte
*/
break;
case 0xb2: /* Interrupt enable
Bit 0 - Serial transmit interrupt enable
Bit 1 - Key press interrupt enable
Bit 2 - RTC alarm interrupt enable
Bit 3 - Serial receive interrupt enable
Bit 4 - Drawing line detection interrupt enable
Bit 5 - VBlank timer interrupt enable
Bit 6 - VBlank interrupt enable
Bit 7 - HBlank timer interrupt enable
*/
break;
case 0xb3: /* serial communication control
Bit 0 - Receive complete
Bit 1 - Error
Bit 2 - Send complete
Bit 3-4 - Unknown
Bit 5 - Send data interrupt generation
Bit 6 - Connection speed: 0 = 9600 bps, 1 = 38400 bps
bit 7 - Receive data interrupt generation
*/
// data |= 0x02;
m_ws_portram[0xb1] = 0xff;
if (data & 0x80)
{
// m_ws_portram[0xb1] = 0x00;
data |= 0x04;
}
if (data & 0x20)
{
// data |= 0x01;
}
break;
case 0xb5: /* Read controls
Bit 0-3 - Current state of input lines (read-only)
Bit 4-6 - Select line of inputs to read
001 - Read Y cursors
010 - Read X cursors
100 - Read START,A,B buttons
Bit 7 - Unknown
*/
data = data & 0xf0;
switch (data)
{
case 0x10: /* Read Y cursors: Y1 - Y2 - Y3 - Y4 */
input = m_cursy->read();
if (m_rotate) // reorient controls if the console is rotated
{
if (input & 0x01) data |= 0x02;
if (input & 0x02) data |= 0x04;
if (input & 0x04) data |= 0x08;
if (input & 0x08) data |= 0x01;
}
else
data = data | input;
break;
case 0x20: /* Read X cursors: X1 - X2 - X3 - X4 */
input = m_cursx->read();
if (m_rotate) // reorient controls if the console is rotated
{
if (input & 0x01) data |= 0x02;
if (input & 0x02) data |= 0x04;
if (input & 0x04) data |= 0x08;
if (input & 0x08) data |= 0x01;
}
else
data = data | input;
break;
case 0x40: /* Read buttons: START - A - B */
data = data | m_buttons->read();
break;
}
break;
case 0xb6: /* Interrupt acknowledge
Bit 0 - Serial transmit interrupt acknowledge
Bit 1 - Key press interrupt acknowledge
Bit 2 - RTC alarm interrupt acknowledge
Bit 3 - Serial receive interrupt acknowledge
Bit 4 - Drawing line detection interrupt acknowledge
Bit 5 - VBlank timer interrupt acknowledge
Bit 6 - VBlank interrupt acknowledge
Bit 7 - HBlank timer interrupt acknowledge
*/
wswan_clear_irq_line(data);
data = m_ws_portram[0xb6];
break;
case 0xba: /* Internal EEPROM data (low)
Bit 0-7 - Internal EEPROM data transfer bit 0-7
*/
case 0xbb: /* Internal EEPROM data (high)
Bit 0-7 - Internal EEPROM data transfer bit 8-15
*/
break;
case 0xbc: /* Internal EEPROM address (low)
Bit 0-7 - Internal EEPROM address bit 1-8
*/
case 0xbd: /* Internal EEPROM address (high)
Bit 0 - Internal EEPROM address bit 9(?)
Bit 1-7 - Unknown
Only 1KByte internal EEPROM??
*/
break;
case 0xbe: /* Internal EEPROM command
Bit 0 - Read complete (read only)
Bit 1 - Write complete (read only)
Bit 2-3 - Unknown
Bit 4 - Read
Bit 5 - Write
Bit 6 - Protect
Bit 7 - Initialize
*/
if (data & 0x20)
{
UINT16 addr = ( ( ( m_ws_portram[0xbd] << 8 ) | m_ws_portram[0xbc] ) << 1 ) & 0x1FF;
m_internal_eeprom[ addr ] = m_ws_portram[0xba];
m_internal_eeprom[ addr + 1 ] = m_ws_portram[0xbb];
data |= 0x02;
}
else if ( data & 0x10 )
{
UINT16 addr = ( ( ( m_ws_portram[0xbd] << 8 ) | m_ws_portram[0xbc] ) << 1 ) & 0x1FF;
m_ws_portram[0xba] = m_internal_eeprom[ addr ];
m_ws_portram[0xbb] = m_internal_eeprom[ addr + 1];
data |= 0x01;
}
else
{
logerror( "Unsupported internal EEPROM command: %X\n", data );
}
break;
case 0xc0: // ROM bank $40000-$fffff
case 0xc1: // SRAM bank
case 0xc2: // ROM bank $20000-$2ffff
case 0xc3: // ROM bank $30000-$3ffff
case 0xc4:
case 0xc5:
case 0xc6: // EEPROM address / command
case 0xc7: // EEPROM address / command
case 0xc8: // EEPROM command
case 0xc9:
case 0xca: // RTC command
case 0xcb: // RTC data
case 0xcc:
case 0xcd:
case 0xce:
case 0xcf:
m_cart->write_io(space, offset & 0x0f, data);
break;
default:
logerror( "Write to unsupported port: %X - %X\n", offset, data );
break;
}
/* Update the port value */
m_ws_portram[offset] = data;
}
TIMER_CALLBACK_MEMBER(wswan_state::wswan_scanline_interrupt)
{
if( m_vdp.current_line < 144 )
{
wswan_refresh_scanline();
}
/* Decrement 12kHz (HBlank) counter */
if ( m_vdp.timer_hblank_enable && m_vdp.timer_hblank_reload != 0 )
{
m_vdp.timer_hblank_count--;
logerror( "timer_hblank_count: %X\n", m_vdp.timer_hblank_count );
if ( m_vdp.timer_hblank_count == 0 )
{
if ( m_vdp.timer_hblank_mode )
{
m_vdp.timer_hblank_count = m_vdp.timer_hblank_reload;
}
else
{
m_vdp.timer_hblank_reload = 0;
}
logerror( "trigerring hbltmr interrupt\n" );
wswan_set_irq_line( WSWAN_IFLAG_HBLTMR );
}
}
/* Handle Sound DMA */
if ( ( m_sound_dma.enable & 0x88 ) == 0x80 )
{
address_space &space = m_maincpu->space(AS_PROGRAM );
/* TODO: Output sound DMA byte */
port_w( space, 0x89, space.read_byte(m_sound_dma.source ) );
m_sound_dma.size--;
m_sound_dma.source = ( m_sound_dma.source + 1 ) & 0x0FFFFF;
if ( m_sound_dma.size == 0 )
{
m_sound_dma.enable &= 0x7F;
}
}
// m_vdp.current_line = (m_vdp.current_line + 1) % 159;
if( m_vdp.current_line == 144 ) // buffer sprite table
{
memcpy(m_vdp.sprite_table_buffer, &m_vdp.vram[m_vdp.sprite_table_address], 512);
m_vdp.sprite_count = m_ws_portram[0x06];
m_vdp.sprite_first = m_ws_portram[0x05]; // always zero?
}
if( m_vdp.current_line == 144 )
{
wswan_set_irq_line( WSWAN_IFLAG_VBL );
/* Decrement 75Hz (VBlank) counter */
if ( m_vdp.timer_vblank_enable && m_vdp.timer_vblank_reload != 0 )
{
m_vdp.timer_vblank_count--;
logerror( "timer_vblank_count: %X\n", m_vdp.timer_vblank_count );
if ( m_vdp.timer_vblank_count == 0 )
{
if ( m_vdp.timer_vblank_mode )
{
m_vdp.timer_vblank_count = m_vdp.timer_vblank_reload;
}
else
{
m_vdp.timer_vblank_reload = 0;
}
logerror( "triggering vbltmr interrupt\n" );
wswan_set_irq_line( WSWAN_IFLAG_VBLTMR );
}
}
}
// m_vdp.current_line = (m_vdp.current_line + 1) % 159;
if ( m_vdp.current_line == m_vdp.line_compare )
{
wswan_set_irq_line( WSWAN_IFLAG_LCMP );
}
m_vdp.current_line = (m_vdp.current_line + 1) % 159;
}
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