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rainbow: kbd leds (nw)

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This commit is contained in:
cracyc 2016-06-03 17:12:03 -05:00
parent e9cbd65325
commit c9e7cd4dc9
1 changed files with 10 additions and 11 deletions
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21
src/mame/machine/dec_lk201.cpp
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@ -592,9 +592,9 @@ WRITE8_MEMBER( lk201_device::ddr_w )
{
// printf("%02x to PORT %c DDR (PC=%x)\n", data, 'A' + offset, m_maincpu->pc());
send_port(space, offset, ports[offset] & data);
UINT8 olddata = ddrs[offset];
ddrs[offset] = data;
send_port(space, offset, ports[offset] & olddata);
}
READ8_MEMBER( lk201_device::ports_r )
@ -613,14 +613,17 @@ READ8_MEMBER( lk201_device::ports_r )
WRITE8_MEMBER( lk201_device::ports_w )
{
send_port(space, offset, data);
UINT8 olddata = ports[offset];
ports[offset] = data;
send_port(space, offset, olddata & ddrs[offset]);
}
void lk201_device::send_port(address_space &space, UINT8 offset, UINT8 data)
void lk201_device::send_port(address_space &space, UINT8 offset, UINT8 olddata)
{
// printf("PORT %c write %02x (DDR = %02x) (PC=%x)\n", 'A' + offset, data, ddrs[offset], m_maincpu->pc());
UINT8 porta = ports[0] & ddrs[0];
UINT8 portb = ports[1] & ddrs[1];
UINT8 portc = ports[2] & ddrs[2];
switch (offset)
{
@ -632,13 +635,9 @@ void lk201_device::send_port(address_space &space, UINT8 offset, UINT8 data)
case 2: // port C
// Check for keyboard read strobe
if (((data & 0x40) == 0) && (ports[offset] & 0x40))
if (((portc & 0x40) == 0) && (olddata & 0x40))
{
#ifndef KEYBOARD_WORKAROUND
UINT8 porta = ports[0] & ddrs[0];
UINT8 portb = ports[1] & ddrs[1];
UINT8 portc = ports[2] & ddrs[2];
if (porta & 0x1) kbd_data = m_kbd0->read();
if (porta & 0x2) kbd_data = m_kbd1->read();
if (porta & 0x4) kbd_data = m_kbd2->read();
@ -659,7 +658,7 @@ void lk201_device::send_port(address_space &space, UINT8 offset, UINT8 data)
if (portc & 0x2) kbd_data = m_kbd17->read();
}
// Check for LED update strobe
if (((data & 0x80) == 0) && (ports[offset] & 0x80))
if (((portc & 0x80) == 0) && (olddata & 0x40))
{
// Lower nibble contains the LED values (1 = on, 0 = off)
machine().output().set_value("led_wait" , (led_data & 0x1) == 0);