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add portdirection regs

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This commit is contained in:
Michaël Banaan Ananas 2011-09-13 22:54:42 +00:00
parent cca1ef2e20
commit 2bc73a1276
1 changed files with 68 additions and 18 deletions
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86
src/emu/cpu/m37710/m37710.c
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@ -398,6 +398,8 @@ static void m37710_recalc_timer(m37710i_cpu_struct *cpustate, int timer)
static UINT8 m37710_internal_r(m37710i_cpu_struct *cpustate, int offset)
{
UINT8 d;
#if M37710_DEBUG
if (offset > 1)
logerror("m37710_internal_r from %02x: %s (PC=%x)\n", (int)offset, m37710_rnames[(int)offset], REG_PB<<16 | REG_PC);
@ -407,23 +409,50 @@ static UINT8 m37710_internal_r(m37710i_cpu_struct *cpustate, int offset)
{
// ports
case 0x02: // p0
return cpustate->io->read_byte(M37710_PORT0);
d = cpustate->m37710_regs[0x04];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT0)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x03: // p1
return cpustate->io->read_byte(M37710_PORT1);
d = cpustate->m37710_regs[0x05];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT1)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x06: // p2
return cpustate->io->read_byte(M37710_PORT2);
d = cpustate->m37710_regs[0x08];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT2)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x07: // p3
return cpustate->io->read_byte(M37710_PORT3);
d = cpustate->m37710_regs[0x09];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT3)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x0a: // p4
return cpustate->io->read_byte(M37710_PORT4);
d = cpustate->m37710_regs[0x0c];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT4)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x0b: // p5
return cpustate->io->read_byte(M37710_PORT5);
d = cpustate->m37710_regs[0x0d];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT5)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x0e: // p6
return cpustate->io->read_byte(M37710_PORT6);
d = cpustate->m37710_regs[0x10];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT6)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x0f: // p7
return cpustate->io->read_byte(M37710_PORT7);
d = cpustate->m37710_regs[0x11];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT7)&~d) | (cpustate->m37710_regs[offset]&d);
break;
case 0x12: // p8
return cpustate->io->read_byte(M37710_PORT8);
d = cpustate->m37710_regs[0x14];
if (d != 0xff)
return (cpustate->io->read_byte(M37710_PORT8)&~d) | (cpustate->m37710_regs[offset]&d);
break;
// A-D regs
case 0x20:
@ -472,12 +501,15 @@ static UINT8 m37710_internal_r(m37710i_cpu_struct *cpustate, int offset)
default:
return cpustate->m37710_regs[offset];
}
return cpustate->m37710_regs[offset];
}
static void m37710_internal_w(m37710i_cpu_struct *cpustate, int offset, UINT8 data)
{
int i;
UINT8 prevdata;
UINT8 d;
#if M37710_DEBUG
if (offset != 0x60) // filter out watchdog
@ -491,31 +523,49 @@ static void m37710_internal_w(m37710i_cpu_struct *cpustate, int offset, UINT8 da
{
// ports
case 0x02: // p0
cpustate->io->write_byte(M37710_PORT0, data);
d = cpustate->m37710_regs[0x04];
if (d != 0)
cpustate->io->write_byte(M37710_PORT0, data&d);
break;
case 0x03: // p1
cpustate->io->write_byte(M37710_PORT1, data);
d = cpustate->m37710_regs[0x05];
if (d != 0)
cpustate->io->write_byte(M37710_PORT1, data&d);
break;
case 0x06: // p2
cpustate->io->write_byte(M37710_PORT2, data);
d = cpustate->m37710_regs[0x08];
if (d != 0)
cpustate->io->write_byte(M37710_PORT2, data&d);
break;
case 0x07: // p3
cpustate->io->write_byte(M37710_PORT3, data);
d = cpustate->m37710_regs[0x09];
if (d != 0)
cpustate->io->write_byte(M37710_PORT3, data&d);
break;
case 0x0a: // p4
cpustate->io->write_byte(M37710_PORT4, data);
d = cpustate->m37710_regs[0x0c];
if (d != 0)
cpustate->io->write_byte(M37710_PORT4, data&d);
break;
case 0x0b: // p5
cpustate->io->write_byte(M37710_PORT5, data);
d = cpustate->m37710_regs[0x0d];
if (d != 0)
cpustate->io->write_byte(M37710_PORT5, data&d);
break;
case 0x0e: // p6
cpustate->io->write_byte(M37710_PORT6, data);
d = cpustate->m37710_regs[0x10];
if (d != 0)
cpustate->io->write_byte(M37710_PORT6, data&d);
break;
case 0x0f: // p7
cpustate->io->write_byte(M37710_PORT7, data);
d = cpustate->m37710_regs[0x11];
if (d != 0)
cpustate->io->write_byte(M37710_PORT7, data&d);
break;
case 0x12: // p8
cpustate->io->write_byte(M37710_PORT8, data);
d = cpustate->m37710_regs[0x14];
if (d != 0)
cpustate->io->write_byte(M37710_PORT8, data&d);
break;
case 0x40: // count start