6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-01-13 22:32:03 +00:00
Code Issues Projects Releases Wiki Activity

Added further comments.

Browse Source
This commit is contained in:
Thomas Harte 2016-07-10 08:01:16 -04:00
parent d8334edf4a
commit 824d9ea92b
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Machines/Commodore/1540/C1540.cpp
View File

@ -13,19 +13,22 @@ using namespace Commodore::C1540;
Machine::Machine()
{
// create a serial port and a VIA to run it
_serialPortVIA.reset(new SerialPortVIA);
_serialPort.reset(new SerialPort);
// attach the serial port to its VIA and vice versa
_serialPort->set_serial_port_via(_serialPortVIA);
_serialPortVIA->set_serial_port(_serialPort);
// set this instance as the delegate to receive interrupt requests from both VIAs
_serialPortVIA->set_delegate(this);
_driveVIA.set_delegate(this);
}
void Machine::set_serial_bus(std::shared_ptr<::Commodore::Serial::Bus> serial_bus)
{
_serialPort->set_serial_bus(serial_bus);
serial_bus->add_port(_serialPort);
Commodore::Serial::AttachPortAndBus(_serialPort, serial_bus);
}
unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value)
@ -42,6 +45,14 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
}
if(log) printf("[%c %04x] ", isReadOperation(operation) ? 'r' : 'w', address);*/
/*
Memory map (given that I'm unsure yet on any potential mirroring):
0x0000–0x07ff RAM
0x1800–0x180f the serial-port VIA
0x1c00–0x1c0f the drive VIA
0xc000–0xffff ROM
*/
if(address < 0x800)
{
if(isReadOperation(operation))
@ -84,5 +95,6 @@ void Machine::set_rom(const uint8_t *rom)
void Machine::mos6522_did_change_interrupt_status(void *mos6522)
{
// both VIAs are connected to the IRQ line
set_irq_line(_serialPortVIA->get_interrupt_line() || _driveVIA.get_interrupt_line());
}