// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
#include "emu.h"
#include "includes/gamepock.h"
#include "cpu/upd7810/upd7810.h"
void gamepock_state::hd44102ch_w( int which, int c_d, uint8_t data )
{
if ( c_d )
{
uint8_t y;
/* Data */
m_hd44102ch[which].ram[ m_hd44102ch[which].address ] = data;
/* Increment/decrement Y counter */
y = ( m_hd44102ch[which].address & 0x3F ) + m_hd44102ch[which].y_inc;
if ( y == 0xFF )
{
y = 49;
}
if ( y == 50 )
{
y = 0;
}
m_hd44102ch[which].address = ( m_hd44102ch[which].address & 0xC0 ) | y;
}
else
{
/* Command */
switch ( data )
{
case 0x38: /* Display off */
m_hd44102ch[which].enabled = 0;
break;
case 0x39: /* Display on */
m_hd44102ch[which].enabled = 1;
break;
case 0x3A: /* Y decrement mode */
m_hd44102ch[which].y_inc = 0xFF;
break;
case 0x3B: /* Y increment mode */
m_hd44102ch[which].y_inc = 0x01;
break;
case 0x3E: /* Display start page #0 */
case 0x7E: /* Display start page #1 */
case 0xBE: /* Display start page #2 */
case 0xFE: /* Display start page #3 */
m_hd44102ch[which].start_page = data & 0xC0;
break;
default:
if ( ( data & 0x3F ) < 50 )
{
m_hd44102ch[which].address = data;
}
break;
}
}
}
void gamepock_state::hd44102ch_init( int which )
{
memset( &m_hd44102ch[which], 0, sizeof( HD44102CH ) );
m_hd44102ch[which].y_inc = 0x01;
}
void gamepock_state::lcd_update()
{
/* Check whether HD44102CH #1 is enabled */
if ( m_port_a & 0x08 )
{
hd44102ch_w( 0, m_port_a & 0x04, m_port_b );
}
/* Check whether HD44102CH #2 is enabled */
if ( m_port_a & 0x10 )
{
hd44102ch_w( 1, m_port_a & 0x04, m_port_b );
}
/* Check whether HD44102CH #3 is enabled */
if ( m_port_a & 0x20 )
{
hd44102ch_w( 2, m_port_a & 0x04, m_port_b );
}
}
WRITE8_MEMBER( gamepock_state::port_a_w )
{
uint8_t old_port_a = m_port_a;
m_port_a = data;
if ( ! ( old_port_a & 0x02 ) && ( m_port_a & 0x02 ) )
{
lcd_update();
}
}
WRITE8_MEMBER( gamepock_state::port_b_w )
{
m_port_b = data;
}
READ8_MEMBER( gamepock_state::port_b_r )
{
logerror("gamepock_port_b_r: not implemented\n");
return 0xFF;
}
READ8_MEMBER( gamepock_state::port_c_r )
{
uint8_t data = 0xFF;
if ( m_port_a & 0x80 )
{
data &= ioport("IN0")->read();
}
if ( m_port_a & 0x40 )
{
data &= ioport("IN1")->read();
}
return data;
}
void gamepock_state::machine_reset()
{
hd44102ch_init( 0 );
hd44102ch_init( 1 );
hd44102ch_init( 2 );
if (m_cart->exists())
m_maincpu->space(AS_PROGRAM).install_read_handler(0x4000,0xbfff, read8sm_delegate(*m_cart, FUNC(generic_slot_device::read_rom)));
}
uint32_t gamepock_state::screen_update_gamepock(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint8_t ad;
/* Handle HD44102CH #0 */
ad = m_hd44102ch[0].start_page;
for ( int i = 0; i < 4; i++ )
{
for ( int j = 0; j < 50; j++ )
{
bitmap.pix16(i * 8 + 0, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x01 ) ? 0 : 1;
bitmap.pix16(i * 8 + 1, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x02 ) ? 0 : 1;
bitmap.pix16(i * 8 + 2, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x04 ) ? 0 : 1;
bitmap.pix16(i * 8 + 3, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x08 ) ? 0 : 1;
bitmap.pix16(i * 8 + 4, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x10 ) ? 0 : 1;
bitmap.pix16(i * 8 + 5, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x20 ) ? 0 : 1;
bitmap.pix16(i * 8 + 6, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x40 ) ? 0 : 1;
bitmap.pix16(i * 8 + 7, 49 - j ) = ( m_hd44102ch[0].ram[ad+j] & 0x80 ) ? 0 : 1;
}
ad += 0x40;
}
/* Handle HD44102CH #1 */
ad = m_hd44102ch[1].start_page;
for ( int i = 4; i < 8; i++ )
{
for ( int j = 0; j < 50; j++ )
{
bitmap.pix16(i * 8 + 0, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x01 ) ? 0 : 1;
bitmap.pix16(i * 8 + 1, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x02 ) ? 0 : 1;
bitmap.pix16(i * 8 + 2, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x04 ) ? 0 : 1;
bitmap.pix16(i * 8 + 3, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x08 ) ? 0 : 1;
bitmap.pix16(i * 8 + 4, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x10 ) ? 0 : 1;
bitmap.pix16(i * 8 + 5, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x20 ) ? 0 : 1;
bitmap.pix16(i * 8 + 6, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x40 ) ? 0 : 1;
bitmap.pix16(i * 8 + 7, j ) = ( m_hd44102ch[1].ram[ad+j] & 0x80 ) ? 0 : 1;
}
ad += 0x40;
}
/* Handle HD44102CH #2 */
ad = m_hd44102ch[2].start_page;
for ( int i = 0; i < 4; i++ )
{
for ( int j = 0; j < 25; j++ )
{
bitmap.pix16(i * 8 + 0, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x01 ) ? 0 : 1;
bitmap.pix16(i * 8 + 1, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x02 ) ? 0 : 1;
bitmap.pix16(i * 8 + 2, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x04 ) ? 0 : 1;
bitmap.pix16(i * 8 + 3, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x08 ) ? 0 : 1;
bitmap.pix16(i * 8 + 4, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x10 ) ? 0 : 1;
bitmap.pix16(i * 8 + 5, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x20 ) ? 0 : 1;
bitmap.pix16(i * 8 + 6, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x40 ) ? 0 : 1;
bitmap.pix16(i * 8 + 7, 50 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x80 ) ? 0 : 1;
}
for ( int j = 25; j < 50; j++ )
{
bitmap.pix16(32 + i * 8 + 0, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x01 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 1, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x02 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 2, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x04 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 3, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x08 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 4, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x10 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 5, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x20 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 6, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x40 ) ? 0 : 1;
bitmap.pix16(32 + i * 8 + 7, 25 + j ) = ( m_hd44102ch[2].ram[ad+j] & 0x80 ) ? 0 : 1;
}
ad += 0x40;
}
return 0;
}
/* This is called whenever the T0 pin switches state */
WRITE_LINE_MEMBER(gamepock_state::gamepock_to_w)
{
m_speaker->level_w(state & 1);
}