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Fixed test and added basic implementation of data direction.

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This commit is contained in:
Thomas Harte 2016-06-18 17:17:03 -04:00
parent eea850cd12
commit f4915c5ad6
3 changed files with 22 additions and 16 deletions
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32
Components/6522/6522.hpp
View File

@ -35,17 +35,17 @@ template <class T> class MOS6522 {
{
case 0x0:
_registers.output[1] = value;
static_cast<T *>(this)->set_port_output(1, value); // TODO: handshake
break;
case 0x1:
_registers.output[0] = value;
static_cast<T *>(this)->set_port_output(0, value); // TODO: handshake
static_cast<T *>(this)->set_port_output(1, value, _registers.data_direction[1]); // TODO: handshake
break;
case 0xf:
// No handshake, so write directly
case 0x1:
_registers.output[0] = value;
static_cast<T *>(this)->set_port_output(0, value);
static_cast<T *>(this)->set_port_output(0, value, _registers.data_direction[0]); // TODO: handshake
break;
// // No handshake, so write directly
// _registers.output[0] = value;
// static_cast<T *>(this)->set_port_output(0, value);
// break;
case 0x2:
_registers.data_direction[1] = value;
@ -104,10 +104,9 @@ template <class T> class MOS6522 {
// printf("6522 %p: %d\n", this, address);
switch(address)
{
// case 0x0: return (_registers.auxiliary_control & 0x40) ? _registers.input[1] : static_cast<T *>(this)->get_port_input(1);
case 0x0: return _registers.output[1];//static_cast<T *>(this)->get_port_input(1);
case 0x0: return get_port_input(1, _registers.data_direction[1], _registers.output[1]);
case 0xf: // TODO: handshake, latching
case 0x1: return static_cast<T *>(this)->get_port_input(0);
case 0x1: return get_port_input(0, _registers.data_direction[0], _registers.output[0]);
case 0x2: return _registers.data_direction[1];
case 0x3: return _registers.data_direction[0];
@ -202,11 +201,18 @@ template <class T> class MOS6522 {
{}
private:
// Intended to be overridden
uint8_t get_port_input(int port) { return 0xff; }
void set_port_output(int port, uint8_t value) {}
// Expected to be overridden
uint8_t get_port_input(int port) { return 0xff; }
void set_port_output(int port, uint8_t value, uint8_t direction_mask) {}
// void set_interrupt_status(bool status) {}
// Input/output multiplexer
uint8_t get_port_input(int port, uint8_t output_mask, uint8_t output)
{
uint8_t input = static_cast<T *>(this)->get_port_input(port);
return (input & ~output_mask) | (output & output_mask);
}
// Phase toggle
bool _is_phase2;

4
Machines/Vic-20/Vic20.hpp
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@ -75,9 +75,9 @@ class KeyboardVIA: public MOS::MOS6522<KeyboardVIA>, public MOS::MOS6522IRQDeleg
return 0xff;
}
void set_port_output(int port, uint8_t value) {
void set_port_output(int port, uint8_t value, uint8_t mask) {
if(port)
_activation_mask = value;
_activation_mask = (value & mask) | (~mask);
}
KeyboardVIA() {

2
OSBindings/Mac/Clock SignalTests/6522Tests.swift
View File

@ -98,7 +98,7 @@ class MOS6522Tests: XCTestCase {
func testDataDirection() {
with6522 {
// set low four bits of register B as output, the top four as input
$0.setValue(0x0f, forRegister: 2)
$0.setValue(0xf0, forRegister: 2)
// ask to output 0x8c
$0.setValue(0x8c, forRegister: 0)