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comment fixes and variable name clarify (n/w)

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This commit is contained in:
Lord-Nightmare 2016-09-06 13:03:19 -04:00
parent 29663a2bad
commit 9d45c72a63
2 changed files with 5 additions and 5 deletions
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2
src/mame/drivers/arkanoid.cpp
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@ -799,7 +799,7 @@ static ADDRESS_MAP_START( arkanoid_map, AS_PROGRAM, 8, arkanoid_state )
AM_RANGE(0xc000, 0xc7ff) AM_RAM
AM_RANGE(0xd000, 0xd001) AM_DEVWRITE("aysnd", ay8910_device, address_data_w)
AM_RANGE(0xd001, 0xd001) AM_DEVREAD("aysnd", ay8910_device, data_r)
AM_RANGE(0xd008, 0xd008) AM_WRITE(arkanoid_d008_w) /* gfx bank, flip screen etc. */
AM_RANGE(0xd008, 0xd008) AM_WRITE(arkanoid_d008_w) /* gfx bank, flip screen, 68705 reset, etc. */
AM_RANGE(0xd00c, 0xd00c) AM_READ_PORT("SYSTEM") /* 2 bits from the 68705 */
AM_RANGE(0xd010, 0xd010) AM_READ_PORT("BUTTONS") AM_DEVWRITE("watchdog", watchdog_timer_device, reset_w)
AM_RANGE(0xd018, 0xd018) AM_READWRITE(arkanoid_Z80_mcu_r, arkanoid_Z80_mcu_w) /* input from the 68705 */

8
src/mame/machine/arkanoid.cpp
View File

@ -125,20 +125,20 @@ TIMER_CALLBACK_MEMBER(arkanoid_state::timer_68705_increment)
READ8_MEMBER(arkanoid_state::arkanoid_68705_port_c_r)
{
int res = 0;
int port_c_in = 0;
/* bit 0 is latch 1 on ic26, is high if m_Z80HasWritten(latch 1) is set */
if (m_Z80HasWritten)
res |= 0x01;
port_c_in |= 0x01;
/* bit 1 is the negative output of latch 2 on ic26, is high if m_68705write is clear */
if (!m_MCUHasWritten)
res |= 0x02;
port_c_in |= 0x02;
/* bit 2 is an output, to clear latch 1, return whatever state it was set to in m_port_c_out */
/* bit 3 is an output, to set latch 2, return whatever state it was set to in m_port_c_out */
return (m_port_c_internal & m_ddr_c) | (res & ~m_ddr_c);
return (m_port_c_internal & m_ddr_c) | (port_c_in & ~m_ddr_c);
}
WRITE8_MEMBER(arkanoid_state::arkanoid_68705_port_c_w)