6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-12-27 01:31:42 +00:00
Code Issues Projects Releases Wiki Activity

Merge pull request #71 from TomHarte/IRQBenchTest

Browse Source 
Introduces a one-cycle cost to setting 6522 timers
This commit is contained in:
Thomas Harte 2016-11-05 13:00:35 -04:00 committed by GitHub
commit e5de9c8607
4 changed files with 27 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Components/6522/6522.hpp
View File

@ -90,7 +90,7 @@ template <class T> class MOS6522 {
_registers.interrupt_flags &= ~InterruptFlag::Timer1;
if(address == 0x05)
{
_registers.timer[0] = _registers.timer_latch[0];
_registers.next_timer[0] = _registers.timer_latch[0];
_timer_is_running[0] = true;
}
reevaluate_interrupts();
@ -100,7 +100,7 @@ template <class T> class MOS6522 {
case 0x8: _registers.timer_latch[1] = value; break;
case 0x9:
_registers.interrupt_flags &= ~InterruptFlag::Timer2;
_registers.timer[1] = _registers.timer_latch[1] | (uint16_t)(value << 8);
_registers.next_timer[1] = _registers.timer_latch[1] | (uint16_t)(value << 8);
_timer_is_running[1] = true;
reevaluate_interrupts();
break;
@ -242,7 +242,9 @@ template <class T> class MOS6522 {
else\
_registers.timer[0] --;\
\
_registers.timer[1] --;
_registers.timer[1] --; \
if(_registers.next_timer[0] >= 0) { _registers.timer[0] = (uint16_t)_registers.next_timer[0]; _registers.next_timer[0] = -1; }\
if(_registers.next_timer[1] >= 0) { _registers.timer[1] = (uint16_t)_registers.next_timer[1]; _registers.next_timer[1] = -1; }\
// IRQ is raised on the half cycle after overflow
#define phase1() \
@ -367,6 +369,7 @@ template <class T> class MOS6522 {
struct Registers {
uint8_t output[2], input[2], data_direction[2];
uint16_t timer[2], timer_latch[2], last_timer[2];
int next_timer[2];
uint8_t shift;
uint8_t auxiliary_control, peripheral_control;
uint8_t interrupt_flags, interrupt_enable;
@ -377,7 +380,8 @@ template <class T> class MOS6522 {
output{0, 0}, input{0, 0}, data_direction{0, 0},
auxiliary_control(0), peripheral_control(0),
interrupt_flags(0), interrupt_enable(0),
last_timer{0, 0}, timer_needs_reload(false) {}
last_timer{0, 0}, timer_needs_reload(false),
next_timer{-1, -1} {}
} _registers;
// control state

2
Machines/Oric/Oric.cpp
View File

@ -52,7 +52,7 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
// 024D = 0 => fast; otherwise slow
// E6C9 = read byte: return byte in A
if(address == 0xe6c9 && _use_fast_tape_hack && operation == CPU6502::BusOperation::ReadOpcode)
if(address == 0xe6c9 && _use_fast_tape_hack && operation == CPU6502::BusOperation::ReadOpcode && _via.tape->has_tape() && !_via.tape->get_tape()->is_at_end())
{
uint8_t next_byte = _via.tape->get_next_byte(!_ram[0x024d]);
set_value_of_register(CPU6502::A, next_byte);

15
OSBindings/Mac/Clock SignalTests/6522Tests.swift
View File

@ -24,6 +24,9 @@ class MOS6522Tests: XCTestCase {
$0.setValue(10, forRegister: 4)
$0.setValue(0, forRegister: 5)
// complete the setting cycle
$0.run(forHalfCycles: 2)
// run for 5 cycles
$0.run(forHalfCycles: 10)
@ -42,6 +45,9 @@ class MOS6522Tests: XCTestCase {
// change the low-byte latch
$0.setValue(0x40, forRegister: 8)
// complete the cycle
$0.run(forHalfCycles: 2)
// chek that the new latched value hasn't been copied
XCTAssert($0.value(forRegister: 8) == 0x10, "Low order byte should be 0x10; was \($0.value(forRegister: 8))")
XCTAssert($0.value(forRegister: 9) == 0x20, "High order byte should be 0x20; was \($0.value(forRegister: 9))")
@ -49,6 +55,9 @@ class MOS6522Tests: XCTestCase {
// write the low-byte latch
$0.setValue(0x50, forRegister: 9)
// complete the cycle
$0.run(forHalfCycles: 2)
// chek that the latched value has been copied
XCTAssert($0.value(forRegister: 8) == 0x40, "Low order byte should be 0x50; was \($0.value(forRegister: 8))")
XCTAssert($0.value(forRegister: 9) == 0x50, "High order byte should be 0x40; was \($0.value(forRegister: 9))")
@ -63,6 +72,9 @@ class MOS6522Tests: XCTestCase {
$0.setValue(0x40, forRegister: 11)
$0.setValue(0x40 | 0x80, forRegister: 14)
// complete the cycle to set initial values
$0.run(forHalfCycles: 2)
// run for 16 cycles
$0.run(forHalfCycles: 32)
@ -103,6 +115,9 @@ class MOS6522Tests: XCTestCase {
// ask to output 0x8c
$0.setValue(0x8c, forRegister: 0)
// complete the cycle
$0.run(forHalfCycles: 2)
// set current input as 0xda
$0.portBInput = 0xda

5
Outputs/Speaker.hpp
View File

@ -90,11 +90,12 @@ class Speaker {
protected:
void enqueue(std::function<void(void)> function)
{
_queue->enqueue(function);
function();
// _queue->enqueue(function);
}
void flush()
{
_queue->flush();
// _queue->flush();
}
std::unique_ptr<int16_t> _buffer_in_progress;