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Attempted to add support for the most basic of control line output, and slightly to optimise the Vic.

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This commit is contained in:
Thomas Harte
2016-07-01 19:01:22 -04:00
parent 2bc87ee095
commit 7fa010a463
3 changed files with 99 additions and 49 deletions
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Components/6522/6522.hpp
+18 -2
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@@ -108,9 +108,24 @@ template <class T> class MOS6522 {
case 0xa: _registers.shift = value; break;
// Control
case 0xb: _registers.auxiliary_control = value; break;
case 0xb:
_registers.auxiliary_control = value;
break;
case 0xc:
printf("Peripheral control %02x\n", value);
_registers.peripheral_control = value;
switch(value & 0x0e)
{
default: break;
case 0x0c: static_cast<T *>(this)->set_control_line_output(Port::A, Line::Two, false); break;
case 0x0e: static_cast<T *>(this)->set_control_line_output(Port::A, Line::Two, true); break;
}
switch(value & 0xe0)
{
default: break;
case 0xc0: static_cast<T *>(this)->set_control_line_output(Port::B, Line::Two, false); break;
case 0xe0: static_cast<T *>(this)->set_control_line_output(Port::B, Line::Two, true); break;
}
break;
// Interrupt control
@@ -176,7 +191,7 @@ template <class T> class MOS6522 {
return 0xff;
}
inline void set_control_line(Port port, Line line, bool value)
inline void set_control_line_input(Port port, Line line, bool value)
{
switch(line)
{
@@ -270,6 +285,7 @@ template <class T> class MOS6522 {
uint8_t get_port_input(Port port) { return 0xff; }
void set_port_output(Port port, uint8_t value, uint8_t direction_mask) {}
bool get_control_line(Port port, Line line) { return true; }
void set_control_line_output(Port port, Line line, bool value) {}
// void set_interrupt_status(bool status) {}
// Input/output multiplexer