static WRITE16_HANDLER(dbzcontrol_w)
{
/* bit 10 = enable '246 readback */
COMBINE_DATA(&dbz2_control);
if (data & 0x400)
{
K053246_set_OBJCHA_line(ASSERT_LINE);
}
else
{
K053246_set_OBJCHA_line(CLEAR_LINE);
}
}
void simpsons_coin_counter_w( int offset, int data )
{
/* bit 0,1 coin counters */
coin_counter_w(0,data & 0x01);
coin_counter_w(1,data & 0x02);
/* bit 2 selects mono or stereo sound */
/* bit 3 = enable char ROM reading through the video RAM */
K052109_set_RMRD_line((data & 0x08) ? ASSERT_LINE : CLEAR_LINE);
/* bit 4 = INIT (unknown) */
/* bit 5 = enable sprite ROM reading */
K053246_set_OBJCHA_line((~data & 0x20) ? ASSERT_LINE : CLEAR_LINE);
}
static WRITE16_HANDLER( control2_w )
{
if(ACCESSING_LSB) {
/* bit 0 is data */
/* bit 1 is cs (active low) */
/* bit 2 is clock (active high) */
/* bit 3 (unknown: coin) */
/* bit 5 is enable irq 6 */
/* bit 7 (unknown: enable irq 5?) */
EEPROM_write_bit(data & 0x01);
EEPROM_set_cs_line((data & 0x02) ? CLEAR_LINE : ASSERT_LINE);
EEPROM_set_clock_line((data & 0x04) ? ASSERT_LINE : CLEAR_LINE);
cur_control2 = data;
/* bit 6 = enable sprite ROM reading */
K053246_set_OBJCHA_line((data & 0x0040) ? ASSERT_LINE : CLEAR_LINE);
}
}
static WRITE16_HANDLER( eeprom_w )
{
logerror("%06x: write %04x to 108000\n",activecpu_get_pc(),data);
if (ACCESSING_LSB)
{
/* bit 0 = coin counter */
coin_counter_w(0,data & 0x01);
/* bit 2 is data */
/* bit 3 is clock (active high) */
/* bit 4 is cs (active low) */
EEPROM_write_bit(data & 0x04);
EEPROM_set_cs_line((data & 0x10) ? CLEAR_LINE : ASSERT_LINE);
EEPROM_set_clock_line((data & 0x08) ? ASSERT_LINE : CLEAR_LINE);
}
if (ACCESSING_MSB)
{
/* bit 8 = enable sprite ROM reading */
K053246_set_OBJCHA_line((data & 0x0100) ? ASSERT_LINE : CLEAR_LINE);
/* bit 9 = enable char ROM reading through the video RAM */
K052109_set_RMRD_line((data & 0x0200) ? ASSERT_LINE : CLEAR_LINE);
}
}