void msm6222b_device::data_w(UINT8 data)
{
if(adc & 0x80) {
int adr = adc & 0x7f;
if(two_line) {
if((adr >= 40 && adr < 64) || adr >= 64+40)
adr = -1;
if(adr >= 64)
adr += 40-64;
} else {
if(adr >= 80)
adr = -1;
}
if(adr != -1) {
ddram[adr] = data;
if(shift_on_write)
shift_step(cursor_direction);
else
cursor_step(cursor_direction);
}
} else {
if(adc < 8*8) {
cgram[adc] = data;
cursor_step(cursor_direction);
}
}
}
void msm6222b_device::control_w(UINT8 data)
{
int cmd;
for(cmd = 7; cmd >= 0 && !(data & (1<<cmd)); cmd--);
switch(cmd) {
case 0:
memset(ddram, 0x20, sizeof(ddram));
adc = 0x00;
break;
case 1:
adc = 0x00;
shift = 0x00;
break;
case 2:
shift_on_write = data & 1;
cursor_direction = data & 2;
break;
case 3:
display_on = data & 4;
cursor_on = data & 2;
cursor_blinking = data & 1;
break;
case 4:
if(data & 8)
shift_step(data & 4);
else
cursor_step(data & 4);
break;
case 5:
two_line = data & 8;
double_height = (data & 0xc) == 4;
// Bit 4 is 4bits/8bits data access
break;
case 6:
adc = data & 0x3f;
break;
case 7:
adc = data; // Bit 7 is set
break;
}
}
void sed1200_device::control_w(UINT8 data)
{
switch(data) {
case 0x04: case 0x05:
cursor_direction = data & 0x01;
break;
case 0x06: case 0x07:
cursor_step();
break;
case 0x08: case 0x09:
cursor_full = data & 0x01;
break;
case 0x0a: case 0x0b:
cursor_blinking = data & 0x01;
break;
case 0x0c: case 0x0d:
display_on = data & 0x01;
break;
case 0x0e: case 0x0f:
cursor_on = data & 0x01;
break;
case 0x10:
soft_reset();
break;
case 0x12: case 0x13:
break; // Number of lines selection
default:
if((data & 0xf0) == 0x20)
cgram_address = (data & 3)*8;
else if((data & 0xe0) == 0x40) {
cgram[cgram_address++] = data;
if(cgram_address == 4*8)
cgram_address = 0;
} else if(data & 0x80) {
cursor_address = data & 0x40 ? 10 : 0;
cursor_address += (data & 0x3f) >= 10 ? 9 : data & 0x3f;
}
break;
}
}
void sed1200_device::data_w(UINT8 data)
{
ddram[cursor_address] = data;
cursor_step();
}
