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(MESS) cbm2: 8088 WIP. (nw)

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This commit is contained in:
Curt Coder 2012-12-20 19:32:02 +00:00
parent 886412243b
commit befcbf655f
1 changed files with 24 additions and 9 deletions
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33
src/mess/drivers/cbm2.c
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@ -4,7 +4,6 @@
- 8088 board
- CIA timers fail in burn-in test
- NTSC variants unable to load from disk
- shift lock
- Hungarian keyboard
- cbm620hu charom banking?
@ -344,14 +343,16 @@ WRITE8_MEMBER( cbm2_state::write )
READ8_MEMBER( cbm2_state::ext_read )
{
int ras = 1, cas = 1, refen = 1, eras = 1, ecas = 0;
/*int ras = 1, cas = 1, refen = 1, eras = 1, ecas = 0;
int casseg1 = 1, casseg2 = 1, casseg3 = 1, casseg4 = 1, rasseg1 = 1, rasseg2 = 1, rasseg3 = 1, rasseg4 = 1;
this->read_pla(offset, ras, cas, refen, eras, ecas, &casseg1, &casseg2, &casseg3, &casseg4, &rasseg1, &rasseg2, &rasseg3, &rasseg4);
this->read_pla(offset, ras, cas, refen, eras, ecas, &casseg1, &casseg2, &casseg3, &casseg4, &rasseg1, &rasseg2, &rasseg3, &rasseg4);*/
UINT8 data = 0xff;
if (!casseg1)
if (offset < 0x40000)
data = m_ram->pointer()[offset];
/*if (!casseg1)
{
data = m_ram->pointer()[offset & 0xffff];
}
@ -366,7 +367,7 @@ READ8_MEMBER( cbm2_state::ext_read )
if (!casseg4 && (m_ram->size() > 0x30000))
{
data = m_ram->pointer()[0x30000 | (offset & 0xffff)];
}
}*/
return data;
}
@ -378,7 +379,7 @@ READ8_MEMBER( cbm2_state::ext_read )
WRITE8_MEMBER( cbm2_state::ext_write )
{
int ras = 1, cas = 1, refen = 1, eras = 1, ecas = 0;
/*int ras = 1, cas = 1, refen = 1, eras = 1, ecas = 0;
int casseg1 = 1, casseg2 = 1, casseg3 = 1, casseg4 = 1, rasseg1 = 1, rasseg2 = 1, rasseg3 = 1, rasseg4 = 1;
this->read_pla(offset, ras, cas, refen, eras, ecas, &casseg1, &casseg2, &casseg3, &casseg4, &rasseg1, &rasseg2, &rasseg3, &rasseg4);
@ -398,7 +399,10 @@ WRITE8_MEMBER( cbm2_state::ext_write )
if (!casseg4 && (m_ram->size() > 0x30000))
{
m_ram->pointer()[0x30000 | (offset & 0xffff)] = data;
}
}*/
if (offset < 0x40000)
m_ram->pointer()[offset] = data;
}
@ -1787,6 +1791,7 @@ WRITE8_MEMBER( cbm2_state::ext_tpi_pb_w )
// _BUSY2
if (!BIT(data, 0))
{
logerror("BUSY2 1\n");
m_busy2 = 1;
m_busen1 = m_dramon;
}
@ -1805,11 +1810,19 @@ WRITE8_MEMBER( cbm2_state::ext_tpi_pc_w )
2
3
4
5 U22 CLK
5 U22B CLK
6
7
*/
// _BUSY2
if (BIT(data, 5))
{
logerror("BUSY2 1\n");
m_busy2 = 1;
m_busen1 = m_dramon;
}
}
static const tpi6525_interface ext_tpi_intf =
@ -1878,11 +1891,13 @@ WRITE8_MEMBER( cbm2_state::ext_cia_pb_w )
// _BUSY2
if (!BIT(data, 0))
{
logerror("BUSY2 1\n");
m_busy2 = 1;
m_busen1 = m_dramon;
}
else if (!BIT(data, 6))
{
logerror("BUSY2 0\n");
m_busy2 = 0;
m_busen1 = 0;
}