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attache: better method of retrieving the upper 8 bits of the I/O address lines (no whatsnew)

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This commit is contained in:
mahlemiut 2013-05-21 10:10:54 +00:00
parent aeeb15c39c
commit 5fcb2d1e38
1 changed files with 28 additions and 31 deletions
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59
src/mess/drivers/attache.c
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@ -287,26 +287,23 @@ READ8_MEMBER(attache_state::pio_portA_r)
{
UINT8 ret = 0xff;
if(m_operation_enable)
switch(m_pio_select)
{
switch(m_pio_select)
{
case PIO_SEL_8910_DATA:
ret = m_psg->data_r(space,0);
break;
case PIO_SEL_5832_READ:
ret = m_rtc->data_r(space,0);
break;
case PIO_SEL_5101_READ:
ret = m_cmos_ram[m_cmos_select] & 0x0f;
break;
case PIO_SEL_LATCH:
ret = 0xff; // Write-only?
break;
case PIO_SEL_NOP:
logerror("PIO: NOP read\n");
break;
}
case PIO_SEL_8910_DATA:
ret = m_psg->data_r(space,0);
break;
case PIO_SEL_5832_READ:
ret = m_rtc->data_r(space,0);
break;
case PIO_SEL_5101_READ:
ret = m_cmos_ram[m_cmos_select] & 0x0f;
break;
case PIO_SEL_LATCH:
ret = 0xff; // Write-only?
break;
case PIO_SEL_NOP:
logerror("PIO: NOP read\n");
break;
// logerror("PIO: Port A read operation %i returning %02x\n",m_pio_select,ret);
}
@ -341,6 +338,7 @@ void attache_state::operation_strobe(address_space& space, UINT8 data)
case PIO_SEL_5101_WRITE:
m_cmos_select = (m_cmos_select & 0xf0) | (data & 0x0f);
m_cmos_ram[m_cmos_select] = data & 0x0f;
logerror("CMOS: write %02x to byte %02x\n",data & 0x0f, m_cmos_select);
break;
case PIO_SEL_5101_READ:
m_cmos_select = (m_cmos_select & 0xf0) | (data & 0x0f);
@ -402,7 +400,7 @@ WRITE8_MEMBER(attache_state::pio_portB_w)
READ8_MEMBER(attache_state::display_data_r)
{
UINT8 ret = 0xff;
UINT8 param = m_maincpu->state_int(Z80_B);
UINT8 param = (offset & 0xff00) >> 8;
switch(m_current_cmd)
{
@ -424,7 +422,7 @@ READ8_MEMBER(attache_state::display_data_r)
WRITE8_MEMBER(attache_state::display_data_w)
{
UINT8 param = m_maincpu->state_int(Z80_B);
UINT8 param = (offset & 0xff00) >> 8;
switch(m_current_cmd)
{
case DISP_CRTC:
@ -438,7 +436,7 @@ WRITE8_MEMBER(attache_state::display_data_w)
m_char_ram[(m_char_line*128)+(param & 0x7f)] = data;
break;
default:
logerror("Unimplemented display operation %02x data %02x\n",m_current_cmd,data);
logerror("Unimplemented display operation %02x data %02x param %02x\n",m_current_cmd,data,param);
}
}
@ -531,15 +529,14 @@ static ADDRESS_MAP_START( attache_map , AS_PROGRAM, 8, attache_state)
ADDRESS_MAP_END
static ADDRESS_MAP_START( attache_io , AS_IO, 8, attache_state)
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0xe0, 0xed) AM_DEVREADWRITE("dma",am9517a_device,read,write)
AM_RANGE(0xee, 0xee) AM_WRITE(display_command_w)
AM_RANGE(0xef, 0xef) AM_READWRITE(dma_mask_r, dma_mask_w)
AM_RANGE(0xf0, 0xf3) AM_DEVREADWRITE("sio",z80sio_device,read_alt,write_alt)
AM_RANGE(0xf4, 0xf7) AM_DEVREADWRITE("ctc",z80ctc_device,read,write)
AM_RANGE(0xf8, 0xfb) AM_DEVREADWRITE("pio",z80pio_device,read_alt,write_alt)
AM_RANGE(0xfc, 0xfd) AM_DEVICE("fdc",upd765a_device,map)
AM_RANGE(0xfe, 0xfe) AM_READWRITE(display_data_r, display_data_w)
AM_RANGE(0xe0, 0xed) AM_DEVREADWRITE("dma",am9517a_device,read,write) AM_MIRROR(0xff00)
AM_RANGE(0xee, 0xee) AM_WRITE(display_command_w) AM_MIRROR(0xff00)
AM_RANGE(0xef, 0xef) AM_READWRITE(dma_mask_r, dma_mask_w) AM_MIRROR(0xff00)
AM_RANGE(0xf0, 0xf3) AM_DEVREADWRITE("sio",z80sio_device,read_alt,write_alt) AM_MIRROR(0xff00)
AM_RANGE(0xf4, 0xf7) AM_DEVREADWRITE("ctc",z80ctc_device,read,write) AM_MIRROR(0xff00)
AM_RANGE(0xf8, 0xfb) AM_DEVREADWRITE("pio",z80pio_device,read_alt,write_alt) AM_MIRROR(0xff00)
AM_RANGE(0xfc, 0xfd) AM_DEVICE("fdc",upd765a_device,map) AM_MIRROR(0xff00)
AM_RANGE(0xfe, 0xfe) AM_READWRITE(display_data_r, display_data_w) AM_MIRROR(0xff00) AM_MASK(0xffff)
// 0xff - RAM Virtual Map Data
ADDRESS_MAP_END