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Added a deliberately failing data direction test.

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This commit is contained in:
Thomas Harte 2016-06-18 16:40:01 -04:00
parent 2282b59768
commit eea850cd12
3 changed files with 49 additions and 0 deletions
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20
OSBindings/Mac/Clock SignalTests/6522Tests.swift
View File

@ -16,6 +16,8 @@ class MOS6522Tests: XCTestCase {
action(bridge)
}
// MARK: Timer tests
func testTimerCount() {
with6522 {
// set timer 1 to a value of $000a
@ -90,4 +92,22 @@ class MOS6522Tests: XCTestCase {
XCTAssert($0.valueForRegister(5) == 0x00, "High order byte should be 0x00; was \($0.valueForRegister(5))")
}
}
// MARK: Data direction tests
func testDataDirection() {
with6522 {
// set low four bits of register B as output, the top four as input
$0.setValue(0x0f, forRegister: 2)
// ask to output 0x8c
$0.setValue(0x8c, forRegister: 0)
// set current input as 0xda
$0.portBInput = 0xda
// test that the result of reading register B is therefore 0x8a
XCTAssert($0.valueForRegister(0) == 0x8a, "Data direction register should mix input and output; got \($0.valueForRegister(0))")
}
}
}

2
OSBindings/Mac/Clock SignalTests/MOS6522Bridge.h
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@ -11,6 +11,8 @@
@interface MOS6522Bridge : NSObject
@property (nonatomic, readonly) BOOL irqLine;
@property (nonatomic) uint8_t portBInput;
@property (nonatomic) uint8_t portAInput;
- (void)setValue:(uint8_t)value forRegister:(NSUInteger)registerNumber;
- (uint8_t)valueForRegister:(NSUInteger)registerNumber;

27
OSBindings/Mac/Clock SignalTests/MOS6522Bridge.mm
View File

@ -15,11 +15,18 @@ class VanillaVIA: public MOS::MOS6522<VanillaVIA> {
public:
MOS6522Bridge *bridge;
bool irq_line;
uint8_t port_a_value;
uint8_t port_b_value;
void set_interrupt_status(bool new_status)
{
irq_line = new_status;
}
uint8_t get_port_input(int port)
{
return port ? port_b_value : port_a_value;
}
};
@implementation MOS6522Bridge
@ -57,4 +64,24 @@ class VanillaVIA: public MOS::MOS6522<VanillaVIA> {
return _via.irq_line;
}
- (void)setPortAInput:(uint8_t)portAInput
{
_via.port_a_value = portAInput;
}
- (uint8_t)portAInput
{
return _via.port_a_value;
}
- (void)setPortBInput:(uint8_t)portBInput
{
_via.port_b_value = portBInput;
}
- (uint8_t)portBInput
{
return _via.port_b_value;
}
@end